RCS-9659_X_Instruction Manual_EN_Domestic General_X_R1.02_(EN_DYBH0319.0086.0003).pdf

RCS-9659

Auto Synchronizer

Instruction Manual

NR Electric Co., Ltd.

RCS-9659 Auto Synchronizer

NR ELECTRIC CO., LTD. i

Preface

Introduction

This guide and the relevant operating or service manual documentation for the equipment provide

full information on safe handling, commissioning and testing of this equipment.

Documentation for equipment ordered from NR Electric Co., Ltd. is dispatched separately from

manufactured goods and may not be received at the same time. Therefore this guide is provided

to ensure that printed information normally present on equipment is fully understood by the

recipient. Before carrying out any work on the equipment the user should be familiar with the contents of this

manual, and read relevant chapter carefully.

This chapter describes the safety precautions recommended when using the equipment. Before

installing and using the equipment, this chapter must be thoroughly read and understood.

Health and Safety

The information in this chapter of the equipment documentation is intended to ensure that

equipment is properly installed and handled in order to maintain it in a safe condition.

When electrical equipment is in operation, dangerous voltages will be present in certain parts of

the equipment. Failure to observe warning notices, incorrect use, or improper use may endanger

personnel and equipment and cause personal injury or physical damage.

Before working in the terminal strip area, the equipment must be isolated.

Proper and safe operation of the equipment depends on appropriate shipping and handling,

proper storage, installation and commissioning, and on careful operation, maintenance and

servicing. For this reason only qualified personnel may work on or operate the equipment.

Qualified personnel are individuals who:

Are familiar with the installation, commissioning, and operation of the equipment and of the

system to which it is being connected;

Are able to safely perform switching operations in accordance with accepted safety

engineering practices and are authorized to energize and de-energize equipment and to

isolate, ground, and label it;

Are trained in the care and use of safety apparatus in accordance with safety engineering

practices;

Are trained in emergency procedures (first aid).

Instructions and Warnings

The following indicators and standard definitions are used:


NR ELECTRIC CO., LTD. ii

DANGER means that dearth, severe personal injury, or considerable equipment damage will

occur if safety precautions are disregarded.

WARNING means that dearth, severe personal or considerable equipment damage could occur

if safety precautions are disregarded.

CAUTION means that light personal injury or equipment damage may occur if safety

precautions are disregarded. This particularly applies to damage to the device and to

resulting damage of the protected equipment.

WARNING!

The firmware may be upgraded to add new features or enhance/modify existing features, please

make sure that the version of this manual is compatible with the product in your hand.

WARNING!

During operation of electrical equipment, certain parts of these devices are under high voltage.

Severe personal injury or significant equipment damage could result from improper behavior.

Only qualified personnel should work on this equipment or in the vicinity of this equipment. The se

personnel must be familiar with all warnings and service procedures described in this manual, as

well as safety regulations.

In particular, the general facility and safety regulations for work with high-voltage equipment must

be observed. Noncompliance may result in dearth, injury, or significant equipment damage.

DANGER!

Never allow the current transformer (CT) secondary circuit connected to this equipment to be

opened while the primary system is live. Opening the CT circuit will produce a dangerously high

voltage.

WARNING!

Exposed terminals

Do not touch the exposed terminals of this equipment while the power is on, as the high voltage

generated is dangerous

Residual voltage

Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It

takes a few seconds for the voltage to discharge.

CAUTION!

Earth


NR ELECTRIC CO., LTD. iii

The earthing terminal of the equipment must be securely earthed

Operating environment

The equipment must only be used within the range of ambient environment detailed in the

specification and in an environment free of abnormal vibration.

Ratings

Before applying AC voltage and current or the DC power supply to the equipment, check that they

conform to the equipment ratings.

Printed circuit board

Do not attach and remove printed circuit boards when DC power to the equipment is on, as this

may cause the equipment to malfunction.

External circuit

When connecting the output contacts of the equipment to an external circuit, carefully check the

supply voltage used in order to prevent the connected circuit from overheating.

Connection cable

Carefully handle the connection cable without applying excessive force.

Copyright

Version: R1.02

P/N: EN_DYBH0319.0086.0003

Copyright NR 2008. All rights reserved

We reserve all rights to this document and to the information

contained herein. Improper use in particular reproduction and

dissemination to third parties is strictly forbidden except where

expressly authorized.

The information in this manual is carefully checked periodically,

and necessary corrections will be included in future editions. If

nevertheless any errors are detected, suggestions for correction or

improvement are greatly appreciated.

We reserve the rights to make technical improvements without

notice.

NR ELECTRIC CO., LTD.

69 Suyuan Avenue, Jiangning, Nanjing 211102, China

Tel: 86-25-87178185, Fax: 86-25-87178208

Website: www.nari -relays.com

Email: international@nari -relays.com


NR ELECTRIC CO., LTD. iv


NR ELECTRIC CO., LTD. v

Table of Contents

Preface ........................................................................................................................................ i

Introduction ......................................................................................................................... i

Health and Safety ................................................................................................................ i

Instructions and Warnings .................................................................................................. i

Table of Contents....................................................................................................................... v

Chapter 1 Introduction .............................................................................................................. 1

1.1 Application .................................................................................................................... 1

1.2 Functions ...................................................................................................................... 1

1.3 Features ........................................................................................................................ 2

1.4 Ordering ........................................................................................................................ 2

Chapter 2 Technical Data .......................................................................................................... 5

2.1 Electrical Specifications ............................................................................................... 5

2.1.1 Analog Voltage Input Ratings ............................................................................. 5

2.1.2 Power supply ...................................................................................................... 5

2.1.3 Binary input......................................................................................................... 5

2.1.4 Binary output ...................................................................................................... 5

2.1.5 Power supply output for Opto-coupler .............................................................. 6

2.2 Mechanical Specifications............................................................................................ 6

2.3 Ambient Temperature and Humidity Range ................................................................ 6

2.4 Rear Communication Port ............................................................................................ 7

2.5 Type Tests ..................................................................................................................... 8

2.5.1 Environmental tests ............................................................................................ 8

2.5.2 Mechanical tests ................................................................................................. 8

2.5.3 Electrical tests .................................................................................................... 8

2.5.4 Electromagnetic compatibility ........................................................................... 9

2.6 Certifications................................................................................................................. 9

2.7 Functional Specification............................................................................................. 10


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2.7.1 Accurate Operating Scope ............................................................................... 10

2.7.2 Synchronism Check function........................................................................... 10

Chapter 3 Functional Description ............................................................................................11

3.1 Synchronizing Modes ..................................................................................................11

3.1.1 Automatic Synchronizing Mode ........................................................................11

3.1.2 Semi-automatic Synchronizing Mode .............................................................. 13

3.1.3 Manual Synchronizing Mode ............................................................................ 16

3.2 Block Function............................................................................................................ 18

3.3 Time Synchronization................................................................................................. 18

Chapter 4 Automatic Supervision........................................................................................... 21

4.1 General Description .................................................................................................... 21

4.2 Synchronizer Self-supervision................................................................................... 21

4.2.1 Hardware Supervision ...................................................................................... 21

4.2.2 Check Setting .................................................................................................... 21

4.2.3 Voltage drift Supervision and auto adjustment ............................................... 21

4.2.4 DSP sampling Supervision............................................................................... 22

4.2.5 CPU sampling Supervision .............................................................................. 22

4.2.6 Opto-coupler power Supervision ..................................................................... 22

4.2.7 Synchronism Point Supervision ...................................................................... 22

4.2.8 System Voltage Supervision ............................................................................ 22

4.2.9 Voltage Transformer Supervision VTS ..................................................... 22

4.2.10 Circuit Breaker Closing Supervision ............................................................. 23

4.3 Understand the Alarms ............................................................................................... 23

Chapter 5 Metering and Recording......................................................................................... 25


5.2 Metering ...................................................................................................................... 25

5.3 Binary Input................................................................................................................. 26

5.4 Recording.................................................................................................................... 26

5.4.1 General description .......................................................................................... 26

5.4.2 Event recorder .................................................................................................. 27


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5.4.3 Disturbance recorder........................................................................................ 27

Chapter 6 Hardware Description............................................................................................. 29

6.1 Overview ..................................................................................................................... 29

6.2 Plug-in Modules .......................................................................................................... 30

6.2.1 DC Module (No.K DC) ....................................................................................... 30

6.2.2 AC Module (No.J AC) ........................................................................................ 31

6.2.3 LFP Module (No.H LFP) .................................................................................... 33

6.2.4 CPU Module (No.G CPU) .................................................................................. 33

6.2.5 COM module (No.F COM) ................................................................................. 34

6.2.6 OPT Module (No.E OPT) ................................................................................... 36

6.2.7 SIG Module (No.C SIG) ..................................................................................... 40

6.2.8 SIG Module (No.B SIG) ..................................................................................... 41

6.2.9 OUT Module (No.n OUT) ................................................................................... 42

Chapter 7 Settings ................................................................................................................... 45

7.1 Equipment Settings .................................................................................................... 45

7.2 Protection Settings ..................................................................................................... 47

7.3 IP address ................................................................................................................... 50

Chapter 8 HMI Operation Introduction ................................................................................... 51

8.1 Overview ..................................................................................................................... 51

8.1.1 Keypad operation.............................................................................................. 52

8.1.2 LED Indicators .................................................................................................. 53

8.1.3 Communication Ports ....................................................................................... 54

8.1.4 TARGET RESET Button .................................................................................... 54

8.2 Understand the HMI Menu Tree .................................................................................. 54

8.2.1 Overview............................................................................................................ 54

8.2.2 VALUES ............................................................................................................. 55

8.2.3 REPORT............................................................................................................. 56

8.2.4 PRINT................................................................................................................. 56

8.2.5 SETTINGS.......................................................................................................... 56

8.2.6 CLOCK............................................................................................................... 57


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8.2.7 VERSION ........................................................................................................... 57

8.2.8 LANGUAGE ....................................................................................................... 57

8.3 Understand the LCD Display ...................................................................................... 57

8.3.1 Main display under normal operation condition ............................................. 57

8.3.2 Display tripping report...................................................................................... 58

8.3.3 Display self-supervision report........................................................................ 58

8.3.4 Display status change of binary input report .................................................. 59

8.3.5 View the settings............................................................................................... 60

8.3.6 View Records .................................................................................................... 61

8.3.7 Printing reports and waveform ........................................................................ 61

8.4 Input Operation Through Keypad .............................................................................. 62

8.4.1 Change the Settings ......................................................................................... 62

8.4.2 Delete Fault Records and Event Records........................................................ 63

8.4.3 Adjusting Clock................................................................................................. 63

8.4.4 Check Version ................................................................................................... 64

Chapter 9 Communications .................................................................................................... 65


9.2 Rear Communication Port Information...................................................................... 65

9.2.1 RS-485 Interface................................................................................................ 65

9.2.2 Ethernet Interface ............................................................................................. 67

9.2.3 IEC60870-5-103 Communication ...................................................................... 68

9.3 IEC60870-5-103 Interface over Serial Port ................................................................. 68

9.3.1 Physical Connection and Link Layer ............................................................... 68

9.3.2 Initialization ....................................................................................................... 68

9.3.3 Time Synchronization ....................................................................................... 69

9.3.4 Spontaneous Events......................................................................................... 69

9.3.5 General Interrogation........................................................................................ 70

9.3.6 General Functions ............................................................................................ 70

9.3.7 Disturbance Records ........................................................................................ 70

9.4 IEC60870-5-103 Interface over Ethernet .................................................................... 71


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9.5 Messages Description for IEC61850 Protocol........................................................... 71

9.5.1 Overview............................................................................................................ 71

9.5.2 Communication profiles ................................................................................... 72

9.5.3 Server data organization .................................................................................. 73

9.5.4 Server features and configuration ................................................................... 74

9.5.5 ACSI conformance ............................................................................................ 77

Chapter 10 Installation and Commissioning .......................................................................... 81

10.1 Introduction............................................................................................................... 81

10.2 Safety Information .................................................................................................... 81

10.3 Overview.................................................................................................................... 83

10.4 Unpacking and Checking the Equipment ................................................................ 83

10.5 Installing the Protective Device ............................................................................... 84

10.5.1 Overview.......................................................................................................... 84

10.5.2 Dimensions ..................................................................................................... 84

10.5.3 Grounding Guidelines .................................................................................... 85

10.5.4 Cubicle Grounding.......................................................................................... 86

10.5.5 Ground Connection on the Device................................................................. 86

10.5.6 Grounding Strips and their Installation ......................................................... 87

10.5.7 Making the electrical connections ................................................................. 87

10.5.8 Typical Wiring.................................................................................................. 89

10.6 Check the External Circuitry .................................................................................... 90

10.7 Energizing the Equipment ........................................................................................ 91

10.7.1 Checking front panel LCD display ................................................................. 91

10.7.2 Setting the date and time................................................................................ 92

10.7.3 Checking light emitting diodes (LEDs) .......................................................... 92

10.8 Setting the Protective Device ................................................................................... 92

10.9 Establishing Connection and Verifying Communication........................................ 93

10.10 Verifying settings by secondary injection ............................................................. 93

10.10.1 Commissioning Tools ................................................................................... 93

10.10.2 Insulation test (if required) ........................................................................... 94


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10.10.3 Testing the AC Voltage Inputs ...................................................................... 94

10.10.4 Testing the Binary Inputs.............................................................................. 95

10.10.5 Synchronism Function ................................................................................. 96

10.11 Final Check.............................................................................................................. 96

Chapter 11 Maintenance .......................................................................................................... 97

11.1 Appearance Check .................................................................................................... 97

11.2 Failure Tracing and Repair ....................................................................................... 97

11.3 Replace Failed Modules............................................................................................ 98

11.4 Replace Button Battery............................................................................................. 99

11.5 Cleaning .................................................................................................................... 99

11.6 Storage ...................................................................................................................... 99

Chapter 12 Decommissioning and Disposal .........................................................................101

12.1 Decommissioning ....................................................................................................101

12.2 Disposal ...................................................................................................................101

Chapter 13 Manual Version History .......................................................................................103

Chapter 1 Introduction

NR ELECTRIC CO., LTD. 1


1.1 Application

RCS-9659 is a digital synchronizer that determines the proper time to initiate closing of circuit

breaker to parallel a generator and bus, or to reclose a line. In order to fulfill different application

requirements, it is equipped with three kinds of synchronizing modes: automatic synchronizing,

semi-automatic synchronizing and manual synchronizing. By monitoring frequency, voltage and

phase angle, RCS-9659 provides correction signals to governor of prime mover and voltage

regulator of generator for voltage matching and frequency matching. With a powerful and large

capacity, RCS-9659 provides the multi-generator paralleling solution. It can manage up to 10

circuit breakers synchronism.

Prime

mover

Frequency control

Voltage control

Clo

sin

g s

ignal

Circuit breaker

Station bus ABC rotation

Power Grid

GEN A sineBUS A sineGovernor

UG1

UG2

US1

US2

RCS-9659

VTS FDR25

Generator

Regulator

Figure 1.1-1 Typical Application of RCS-9659

1.2 Functions

Automatic synchronizing (25A)

Semi-automatic synchronizing (25SA

Manual synchronizing (25M)

Multi-generator paralleling solution: capability of 10 circuit breakers synchronization. To any

of the circuit breakers, frequency and voltage regulation can be done separately.

Remote/local control paralleling mode

Output of signal contacts

Output block signal to other equipments

Receive block signal from other equipments



Communicate with substation automation system via serial port on IEC60870-5-103 or

Ethernet port based on IEC60870-5-103 or IEC61850.

GPS clock synchronization PPS (pulse per second), PPM (pulse per minute), RS-485

difference level and IRIG-B synchronization.

Oscillograph,8 cycles ahead of closing signal and 2 cycles after closing signal.

1.3 Features

Based on DSP hardware platform, 14 bits high accuracy A/D converter. DSP performs data

acquisition, voltage, frequency and phase angle calculations, voltage and frequency

regulations and synchronism checking task. The breaker can be closed only when the

synchronism condition is met which is judged by DSP. Hereby, security is enhanced

significantly.

Frequency tracking technology is adopted. By the aid of that, real-time value of frequency,

voltage and phase are calculated with high precision on every sampling point.

The equipment uses an integral front panel and closed cabinet. High and low level signals

are separated strictly. With well designed software anti-EMI facilities, the equipments

capability of interference immunity is highly enhanced. Furthermore, its electromagnetic

radiation also satisfies relevant international standards.

Flexible communication function

2 RS-485 communication rear ports conform to IEC 60870-5-103 protocol

1 RS-485 communication rear ports for clock synchronization

4 rear Ethernet ports (optional), IEC 61850, or IEC 60870-5-103 over TCP/IP

Monitoring and Metering

Event Recorder including 64 reports of status change of binary input, 64 self-supervision

reports and 256 operating reports.

Disturbance recorder including 64 fault reports, and 24 waveforms (The file format of

disturbance recorder is compatible with international COMTRADE file.)

Friendly Human Machine interface User Interface

Friendly HMI interface with LCD and 9-button keypad on the front panel.

1 RS-232 communication faceplate port for testing and setting

1 RS-232 communication rear ports or RS-485 for printer

Auxiliary software - RCSPC

1.4 Ordering

Equipment type definition



Composition of type of varieties of the equipment is as follows:

RCS-9659 - XX - NN

num ber of O UT m odule

type of CO M m odule

type of the equipm ent

Figure 1.4-1 Varieties of RCS-9659 Synchronizer

As illustrated in Figure 1.4-1, type of COM module and number of OUT module are configurable.

Table 1.4-1 Equipment configuration

Suffix Possible value Description

XX

No COM module is comprised.

ST RS-485 serial port communication board is equipped. See section

0.

SF 100Mbps optical-fiber Ethernet communication board is

employed. See section 0.

NT 100Mbps RJ-45 twisted wire Ethernet communication board is fit.

See section 0.

NN 110 Number of synchronism output board

Two options are available for rated secondary current of CT inputs: 1A or 5A.

Four options are available for rated auxiliary voltage: 250V, 220V, 125V, 110V.

There are three types of COM module are optional mentioned above.

Chapter 2 Technical Data



2.1 Electrical Specifications

2.1.1 Analog Voltage Input Ratings

Per IEC 60255-6, IEC 60288

Rated Voltage 100V/ 3 , 110V/ 3 100V, 110V 200V

Linear to 100V 173V 230V

Thermal withstand -continuously -10s -1s

120V 200V 250V

120V 200V 250V

200V 350V 400V

Burden at rated



Bounce time 1ms 1ms

Breaking capacity at 250Vdc

0.4A resistance 0.2A inductive (L/R=40ms)

0.2A resistance 0.05A inductive (L/R=40ms)

Durability Loaded contact

Unloaded contact

100,000 operations minimum

10,000,000 operations minimum

Output mode Potential free contact

Making capacity >1000W at L/R=40ms

Max system voltage 250Vac/dc

Test voltage across open contact

1000Vac RMS for 1min

Short duration current 50A for 200ms

2.1.5 Power supply output for Opto-coupler

Rated Voltage 24V

Rated Current 200mA

Max current 500mA

2.2 Mechanical Specifications

Enclosure dimensions (WHD)

482.6177291 (unit: mm)

Mounting Way Flush mounted

Trepanning dimensions (WH)

450179, M6 screw

Housing color Silver grey

Weight per device Approx. 20kg

Display language English

Housing material Aluminum

Location of terminal Rear panel of the device

Protection class

Standard Per IEC60529:1989

Front side IP51 (Flush mounted)

Other sides IP30

Rear side, connection terminals

IP20

2.3 Ambient Temperature and Humidity Range

Standard IEC60255-6:1988

Operating

temperature -25C to +55C

Transport and storage temperature range

-40C to +70C

Permissible humidity 5%-95%, condensation not permissible



2.4 Rear Communication Port

Interface for communicating with RTU/SCADA

RS-485 (EIA)

Electrical

Port number 2

Baud rate 4800~38400bps

Transmission distance



RS-232 (EIA)

Prot number 1

Baud Rate 4800bps~38400bps

Printer type EPSON 300K printer

Safety level Isolation to ELV level

Interface for clock synchronization

RS-485 (EIA)

Port number 1

Transmission distance



Test voltage 5kV, unipolar impulses waveform 1.2/50s,source

energy 0.5J

Insulation resistance

measurements

Per IEC 60255-5:2000

Isolation resistance >100M, 500Vdc

2.5.4 Electromagnetic compatibility

1MHz burst disturbance test

Per IEC 60255-22-1 (idt IEC61000-4-12)

Common mode: class III 2.5KV

Differential mode: class III 1.0KV

Electrostatic discharge test

Per IEC60255-22-2 class IV

For contact discharge: 8kV

For air discharge: 15kV

Radio frequency interference tests

Per IEC 60255-22-3 class III

Frequency sweep

Radiated amplitude-modulated

10V/m (rms), f=801000MHz

Spot frequency

Radiated amplitude-modulated

10V/m (rms), f=80MHz/160MHz/450MHz/900MHz

Radiated pulse-modulated

10V/m (rms), f=900MHz

Fast transient disturbance tests

Per IEC 60255-22-4

Power supply, I/O, Earth: Class IV, 4kV, 2.5 kHz, 5/50ns

Communication terminals: Class IV, 2kV, 5 kHz, 5/50ns

Surge immunity test Per IEC 60255-22-5, 1.2/50us class III

Power supply, AC input, I/O port: 2kV, line to earth; 1kV line to line

Conducted RF Electromagnetic Disturbance

Per IEC 60255-22-6

Power supply, AC, I/O, Comm. Terminal: Class III, 10Vrms, 150 kHz~80MHz

Power Frequency Magnetic Field Immunity

Per IEC 61000-4-8:1993

Class 5: 100A/m for 1min, 1000A/m for 3s

Pulse Magnetic Field

Immunity

Per IEC 61000-4-9:1993

Class 5: 6.4/16s, 1000A/m for 3s

Damped oscillatory magnetic field immunity

IEC 61000-4-10:1993

Class 5: 100kHz & 1MHz100A/m

2.6 Certifications



ISO9001: 2000

ISO14001:2004

OHSAS18001: 1999

ISO10012:2003

CMMI L3

EMC: 89/336/EEC, EN50263:2000

Products safety(PS): 73/23/EEC, EN61010-1: 2001, EN60950: 2002

2.7 Functional Specification

2.7.1 Accurate Operating Scope

Voltage 0.4V100V

Frequency 45HZ55HZ

Time delay 0100S

df/dt 0.3HZ/S10HZ/S

2.7.2 Synchronism Check function

Synchronism points 0~10

Secondary rated voltage (system and generator)

57.70100.00V

Slip frequency 00.5 HZ

Frequency slip speed 110.00 HZ/S

Voltage difference 5%30%

Dead check threshold 5%30%

Corrected angle between system voltage and generator voltage

0330

Pulse wide of adjusting frequency 109999ms

Period of adjusting frequency 109999ms

Pulse wide of adjusting voltage 109999ms

period of adjusting voltage 109999ms

Pulse wide of closing a breaker 109999ms

The breaker closing time 20999ms

Resetting time of checking synchronism 20999s

Tolerance of voltage setting 3%xsetting

Tolerance of slip frequency 0.02HZ

Chapter 3 Functional Description



3.1 Synchronizing Modes

As described in section 1.2, RCS-9659 has three kinds of synchronizing modes. For each mode,

they have two sub-modes: synchronism checking mode and dead checking mode. Just as the

name implies, under synchronism checking mode, the circuit breaker is only permitted to be

closed while all synchronism conditions are met. Dead checking mode allows selection of various

low bus voltage conditions to enable breaker closing without synchronism check. This provides a

black start capability for the system. Three kinds of synchronizing modes are comprehensively

explained in the following sections.

3.1.1 Automatic Synchronizing Mode

When RCS-9659 is configured to work under automatic synchronizing mode, all functions are

provided automatically. RCS-9659 monitors slip frequency (frequency difference), slip speed,

voltage difference and phase angle difference issues control signal to adjust frequency and

voltage of generator for voltage matching and frequency matching, gives close command to the

breaker at the correct instant.

As shown the in logic diagram of automatic synchronizing mode Figure 3.1-1, under automatic

synchronizing mode, there are two sub-modes: synchronism checking mode and dead checking

mode.

Setting [En_DeadChk] determines whether RCS-9659 works as synchronism checking

([En_DeadChk] is 0) mode or dead checking ([En_DeadChk] is 1) way.

Procedure of closing circuit breaker under automatic synchronizing mode

(1) Energize the binary input [BI_AutoSync] manually.

(2) Issue a synchronism command remotely from a substation automation system or a control

center.

(3) RCS-9659 then adjust generator frequency and voltage by sending regulation pulse signals

to the prime mover governor and the voltage regulator according to predetermined settings

automatically.

(4) RCS-9659 will issue a closing command to a circuit breaker automatically when all the

synchronism parameters are within predetermined limits. The closing logic can also adopt

contact of sync-check relay to improve security further. Refer to .

(5) Remotely send a reset command to RCS-9659 to reset operation signals and LED

CLOSE.

If the dead checking mode is enabled ([En_DeadChk] is 1), immediate CB closure is enabled if

the system voltage or generator voltage is less than the setting [V_DeadChk_Sync].

By the way, the automatic synchronizing mode is suitable for a substation or a power plant where



automatic control system is equipped by the aid of which synchronism command can be issued to

RCS-9659 automatically by substation automation system or energy management system.

Logic scheme

Ug



[En_SyncRly]: it is the logic setting used to determine that whether the status of contac ts of

sync-check relay shall be used to back up RCS-9659s operation. Set 1 to adopt normally open

contact and normally closed contact of sync-check relay.

[V_Diff_Sync]: it is the permissible voltage difference for synchronism check.

[f_Diff_Sync]: it is the permissible slip frequrence for synchronism check.

[df/dt_Sync]: it is the permissible frequrence slip speed difference for synchronism check.

U_diff: it is the measured voltage difference.

f_diff: it is the measured slip frequency.

df/dt: is the measured frequency slip speed.

phi_dif: it is the measured angle difference.

Phi_Limit*, V_Limt*: they are constant settings that are unnecessary to modify as it has been

already set in the program.

Us: it represents three phase voltages of system side, e.g. Usa, Usb and Usc.

Ug: it represents three phase voltages of generator side, e.g. Uga, Ugb and Ugc.

VT Circuit Failure: it is the internal flag indicating that VT circuit failure is detected. If

[En_DeadChk] and [En_VTS] are set as 1, a detected VT circuit failure will block the CB closing

command output contact in the dead checking mode.

Block output: it is the NO contact (i.e. BO_Blk_n) on the OUTn board (n=1,2,,A) of RCS-9659

operating to block other equipment

Close CB: it is the NO contact (i.e. BO_Cls_n ) on the module OUTn board (n=1,2,,A) of

RCS-9659 operating to parallel generator or reclose a line.

3.1.2 Semi-automatic Synchronizing Mode

If RCS-9659 is configured to work under semi-automatic synchronizing mode, except that an

operator has to select wanted circuit breaker to close and to initiate synchronism process manually,

the other functions are provided automatically just the same as automatic synchronizing mode.

RCS-9659 monitors slip frequency (frequency difference), slip speed, voltage difference and

phase angle difference, issues control signal to adjust frequency and voltage of generator for

voltage matching and frequency matching, gives close command to the breaker at the correct

instant.

As shown in the logic diagram of automatic synchronizing mode Figure 3.1-2, under

semi-automatic synchronizing mode, there are two sub-modes: synchronism checking mode and

dead checking mode.

Setting [En_DeadChk] and binary input [BI_ManDeadChk] together determine whether RCS-9659

works as synchronism checking ([En_DeadChk] is set 0 or [BI_ManDeadChk] is de-energized)

mode or dead checking ([En_DeadChk] is set 1 and [BI_ManDeadChk] is energized) way. Refer

to Figure 3.1-2.



Procedure of closing circuit breaker under semi-automatic synchronizing mode

(1) Energize the binary input [BI_SemiSync] (refer to 6.2.6) manually.

(2) Select the expected circuit breaker by energizing the associated binary input

[BI_RmtSyncCmd_n]* (n=1,2,,A) manually.

(3) Initiate a synchronism process by energizing the binary input [BI_TrigSync] manually. After

the synchronism process has started, de-energize [BI_TrigSync].

(4) RCS-9659 will adjust generator frequency and voltage by sending regulation pulse signals

to the prime mover governor and the voltage regulator according to predetermined settings

automatically.

(5) RCS-9659 will issue a closing command to a circuit breaker automatically when all the

synchronism parameters are within predetermined limits. When synchronism checking other

than dead checking function is used, the closing logic can also adopt the contact of sync-check

relay to improve security further.

(6) Remotely or locally send a reset command to RCS-9659 to reset operation signals and LED

CLOSE.

(7) De-energize associated binary input [ManualSynCmd.n] (n=1,2,,A) manually.

If the dead checking mode is enabled ([En_DeadChk] is set 1 and [BI_ManDeadChk] is

energized), immediate CB closure is enabled if the system voltage or generator voltage is less

than the setting [V_DeadChk_Sync]. Refer to Figure 3.1-2.

The semi-automatic synchronizing mode is usually used for locally initiating synchronism process

or checking the synchronizer RCS-9659.

Logic scheme

1Ug



[BI_SemiSync]: it is the binary input on terminal E08 used to enable that RCS-9659 works in

semi-automatic synchronizing mode.

[BI_ManSynCmd_n]*: it is the binary input on terminal n28 used to select desired circuit breaker to

be closed.

[BI_TrigSync]: it is the binary input on terminal E23, by which RCS-9659 is triggered to initiate

synchronism process.

[BI_ManDeadChk]: it is the binary input on terminal E10. [BI_ManDeadChk] and [En_DeadChk]

are together used to enable dead checking mode.

[BI_ExtBlk]: it is the binary input on terminal E26, by which RCS-9659 can be blocked by an

external signal from other protection relays.

[BI_RunState]: it is a binary input on terminal E07 used to configure that RCS-9659 works in

normal operation mode or works in testing mode.

[BI_NC_SyncRly]: it is a binary input on terminal E20 used to adopt the status of the normal closed

contact of sync-check relay.

[En_DeadChk]: it is the logic setting used to enable RCS-9659 work under dead checking mode.

[V_DeadChk_Sync]: it is the setting used to judge whether the generator side or the system side is

dead or live.

[En_AutoReg]: it is the logic setting used to determine whether to adjust the frequency and voltage

automatically or not when paralleling a generator. Set 1 to enable the function.

[En_SyncRly]: it is the logic setting used to determine that whether the status of contacts of

sync-check relay shall be used to back up RCS-9659s operation. Set 1 to adopt normally open

contact and normally closed contact of sync-check relay.

[V_Diff_Sync]: it is the permissible voltage difference for synchronism check.

[f_Diff_Sync]: it is the permissible slip frequency for synchronism check.

[df/dt_Sync]: it is the permissible frequency slip speed difference for synchronism check.

U_dif: is the measured voltage difference.

f_dif: it is the measured slip frequency.

df/dt: it is the measured frequency slip speed.

phi_dif: it is the measured angle difference.

Phi_Limit*, V_Limt*: they are constant settings that are unnecessary to modify as it has been

already set in the program.

Us: it represents three phase voltages of system side, e.g. Usa, Usb and Usc.

Ug: it represents three phase voltages of generator side, e.g. Uga, Ugb and Ugc.

VT Circuit Failure: it is the internal flag indicating that VT circuit failure is detected. If



[En_DeadChk] and [En_VTS] are set as 1, a detected VT circuit failure will block the CB closing

command output contact in the dead checking mode.





3.1.3 Manual Synchronizing Mode

When RCS-9659 is configured to work under manual synchronizing mode, all functions have to be

performed manually. According to the information provided by the digital frequency and voltage

meters and synchroscope, the operator controls the speed and voltage of the generator as well as

the closure of the circuit breaker.

As shown in the logic diagram of automatic synchronizing mode Figure 3.1-3, under

semi-automatic synchronizing mode, there are two sub-modes: synchronism checking mode and

dead checking mode.

Binary input [BI_ManDeadChk] determines whether RCS-9659 works as synchronism checking

([BI_ManDeadChk] is de-energized) mode or dead checking ([BI_ManDeadChk] is energized)

way.

Procedure of closing circuit breaker under manual synchronizing mode

(1) Energize binary input [BI_ManSync] manually.

(2) Select expected circuit breaker by energizing associated binary input [BI_ManSynCmd_n]

(n=1,2,,A) manually.

(3) Initiate a synchronism process by energizing binary input [BI_TrigSync] manually.

(4) Adjust the generator frequency and voltage based on reading of frequency meter, and

voltage meter.

(5) Manually issue a closing command to the circuit breaker at the correct instant based on

reading of the synchroscope. When synchronism checking other than deadline checking

function is used, the closing contact can also be in series with the contact of sync-check relay to

improve security further.

(6) Locally send a reset command to RCS-9659 to reset operation signals and LED CLOSE.

Whether the circuit breaker will close or not, it may also depend on the status of the

[BI_ManDeadChk]. Refer to 6.2.6.

(7) De-energize the binary input [BI_TrigSync].

(8) De-energize associated binary input [BI_ManSyncCmd_n]* (n=1,2,,A) manually.

If Dead checking mode is enabled ([BI_ManDeadChk] is as 1) is energized, immediate CB

closure is enabled and the operator can issue closing command immediately. Refer to Figure

3.1-3.



The manual synchronizing mode is applicable for an application where there needs manual

operation. The major drawback is that an operator with enough knowledge to avoid damage to the

machinery is needed.

Logic scheme

[BI_ManSyncCmd_n]*

[BI_TrigSync]

[BI_ManSync]

[BI_NC_SyncRly]

[BI_ManDeadChk]

[BI_ManStepUp]

[BI_RunState]

[BI_ManStepDown]

[BI_ManAccel]

[BI_ExtBlk]

[BI_ManCls]

&

&

&

&

&

1

1

& &

[BI_ManDecel]

Block output

To voltage regulator

To voltage regulator

To prime mover governor

To prime mover governor

Close CB

Figure 3.1-3 Logic Diagram of Manual Synchronizing Mode

Where:

[BI_ManSync]: it is the binary input on terminal E05 used to enable that RCS-9659 works in

manual synchronizing mode.

[BI_ManSyncCmd_n]*: it is the binary input on terminal n28 used to select desired circuit breaker

to be closed.

[BI_TrigSync]: it is the binary input on terminal E23, by which RCS-9659 is triggered to initiate

synchronism process.

[BI_ManDeadChk]: it is the binary input on terminal E10. [BI_ManDeadChk] and [En_DeadChk]

are together used to enable Dead checking mode.

[BI_ManStepUp]: it is the binary input on terminal E09 used to increase the generator voltage.

[BI_ManStepDown]: it the binary input on terminal E09 used to decrease the generator voltage.

[BI_ManAccel]: it is the binary input on terminal E09 used to increase the generator frequency.

[BI_ManDecel]: it is the binary input on terminal E09 used to decrease the generator frequency.

[BI_ManCls]: it is the binary input on terminal E17, by which RCS-9659 is triggered to issue a

closing command to circuit breaker.

[BI_ExtBlk]: it is the binary input on terminal E26, by which RCS-9659 can be blocked by an

external signal from other protection relays.

[BI_RunState]: it is a binary input on terminal E07 used to configure that RCS-9659 works in

normal operation mode or works in testing mode.

[BI_NC_SyncRly]: it is a binary input on terminal E20 used to adopt the status of the normal closed

contact of sync-check relay.







3.2 Block Function

The digital synchronizer can either send block signals to other equipment or be blocked by other

protection relays (refer to6.2.6, the binary input [BI_ExtBlk]).

Once the synchronism process has started, two normal open output contacts provided by SIG

board via terminals C27-C28 and C29-C30 (for automatic or semi-automatic synchronizing mode)

or terminals B27-B28 and B29-B30 (for manual synchronizing mode) will close to issue block

signals to other protection relays. Refer to 6.2.7 and 6.2.8.

3.3 Time Synchronization

As the equipment Real Time Clock has small drift per day, therefore, in order to have a correct

time for time tagging of event or report etc., the operator should set its time periodically or it shou ld

be synchronized by a master clock automatically.

Time synchronization of RCS-9659 can be done by four means:

(1) IRIG-B signal input from external clock device via a RS-485 port named GPS pulse

(2) Differential signal of PPS or PPM from external clock device via a RS-485 port named

GPS pulse

(3) PPM or PPS input via binary input [GPS_Pulse] terminal E02 on OPT board E. Refer

to6.2.6 for detailed description.

(4) Clock message from substation automation system depending on protocol

The external clock device receives the synchronization signal from GPS antenna and then sends it

to RCS-9659 based on IRIG-B standard, as differential signal of PPM or PPS by means of

so-called synchronization bus. When the differential signal is a PPM input, setting [GPS_Pulse]

under EQUIP SETTINGS sub-menu should be set as 1, while if the differential signal is a PPS

input, the setting [GPS_Pulse] should be set as 0. A specific clock synchronization port RS-485

interface is dedicated for this application. Refer to 0.

Substation automation system clock synchronization depends on protocol. The clock message is

directly acquired by RCS-9659 through the substation automation system link. Clock message can

provide full information for a certain time as a way of year, date, hour, minute and second while

pulse input lacks these information.

Therefore, in general applications, clock message is usually combined with PPM or PPS input via

binary input, or combined with differential signal of PPM or PPS by means of the clock

synchronization port RS-485 with an accuracy of 1ms.

Moreover, the user could also set time and data directly using the local human-machine interface



(HMI) of the equipment.

RCS-9659 internal clock will then be adjusted accordingly. When the equipment is synchronized,

all events in TRIP REPORT, ALM REPORT and BI CHG REPORT and current measurement

have a time tag with synchronized attribute.

Chapter 4 Automatic Supervision



4.1 General Description

Though the protection system is in non-operating synchronism state under normal conditions, it is

waiting for a synchronism checking command and must execute it without fail. When the

equipment is in energizing process before the LED HEALTHY is on, the equipment needs to be

checked to ensure no errors. Therefore, the automatic supervision function, which checks the

health of the synchronizing system when startup and during a normal operation, plays an

important role.

The numerical synchronizer based on the microprocessor operations is suitable for implementing

this automatic supervision function of the synchronizing system.

In case a fault is detected during initialization when DC power supply is provided to the equipment,

the equipment will be blocked out, which means the synchronizer is out of service. Before you

must re-energize the synchronizer or reset CPU module by restarting equipment to make it back

into service, please find out the cause and inform the factory.

When a failure is detected by the automatic supervision, it is followed with an LCD message, LED

indication and alarm contact outputs. At the same time event recording will record the failure alarm

which can be viewed in event recording report and be printed.

4.2 Synchronizer Self-supervision

4.2.1 Hardware Supervision

The DSP, RAM, ROM chips on CPU module are monitored to ensure whether they are damaged

or have errors. If any one of them is detected damaged or having error, the equipment will be

blocked and issue the alarm [Alm_RAM] and [Alm_ROM]. At the same time the HEALTHY LED

being extinguished and the ALARM LED being lit.

4.2.2 Check Setting

RCS-9659 series has 10 setting groups protection settings for 10 synchronism points respectively.

The settings of each synchronism point setting are checked to ensure they are reasonable. If the

settings are checked error in DSP chip and CPU chip, an alarm [Alm_Setting] and [Alm_EEPROM]

are issued respectively. Meanwhile, LED HEALTH is extinguished and LED ALARM is lit on.

If these 10 setting groups are not all set, when the protective device is provided with DC power

supply first, an alarm [Alm_InvalidGrp] will be issued. If the secondary rated current of CT (I2n) in

equipment parameters is changed and the protection settings is not confirmed or some settings in

protection settings exceed setting range, the alarm [Alm_InvalidGrp] will be issued. At the same

time the HEALTHY LED is extinguished and the ALARM LED being lit.

4.2.3 Voltage drift Supervision and auto adjustment

Zero point of voltage may drift influenced by variation of temperature or other environment factors.



The equipment continually automatically traces the drift and adjusts it to normal value.

4.2.4 DSP sampling Supervision

AC sampling of DSP chip is monitored and if the samples are detected to be wrong, an alarm

[Alm_Smpl_DSP] will be issued and the equipment will be blocked. At the same time the

HEALTHY LED is extinguished and the ALARM LED being lit.

4.2.5 CPU sampling Supervision

The synchronizer compares the CPU sampling and DSP sampling. In normal condition, the

sampling should be the same for a certain AC input. If a sampling in CPU is detected to be

different largely with that in DSP, the alarm signal [Alm_Smpl_CPU] will be issued and the

synchronizer will be blocked. At the same time the HEALTHY LED is extinguished and the

ALARM LED being lit.

4.2.6 Opto-coupler power Supervision

Positive power supply of opto-coupler is continually monitored. If an error or damage has occurred,

the alarm [Alm_Pwr_Opto] will be issued with ALARM LED being lit, but the equipment will not

be blocked.

4.2.7 Synchronism Point Supervision

In the manual synchronizing mode, if two or more synchronism points are selected (i.e. two or

more binary inputs [BI_ManSyncCmd_n]* are energized at the same time, n=1, 2, , A) or no

synchronism point is selected (i.e. no binary input [BI_ManSyncCmd_n]* is energized, n=1, 2, ,

A) by an operator, but a synchronizing process is triggered by energizing the binary input

[BI_TrigSync], then the alarm signal [Alm_SyncPoint] will be issued with the ALARM LED being

lit, and the synchronizing function is blocked temporarily at the same time.

After the binary inputs of other synchronism points are de-energized and only one binary input of

synchronism point is kept being energized, then the alarm signal will reset with the ALARM LED

being extinguished. The synchronism checking of the point still can be carried out if the

synchronizer doesnt reset.

4.2.8 System Voltage Supervision

If the logic setting [En_DeadChk] is set as 0 and the system or generator voltage is tool low (less

than [V_DeadChk_Syn]) during a synchronism process (i.e. a synchronism process is triggered

manually or remotely), then the alarm signal [Alm_UV_Sys] will be issued with the ALARM LED

being lit, and synchronizing function is blocked temporarily at the same time.

After the system or generator voltage returns to a normal condition, the alarm signal will rest with

the ALARM LED being extinguished. The synchronism checking still can be carried out if the


4.2.9 Voltage Transformer Supervision VTS

If the logic setting [En_VTS] are set as 1 and the negative sequence voltage of the generator



side or system side is more than 8V, then the alarm signal [Alm_VTS] will be issued with the

ALARM LED being lit. If the logic setting [En_DeadChk] is set as 1 at the same time, the

synchronizing function is blocked temporarily.

After the generator or system voltage returns to a normal condition, the alarm signal will rest with

the ALARM LED being extinguished. The synchronism checking still can be carried out if the


4.2.10 Circuit Breaker Closing Supervision

After a closing pulse to close a circuit breaker is issued by the synchronizer, the alarm signal

[Alm_Fail_Cls] will be issued if the auxiliary contact of the circuit breaker doesnt return a signal

(i.e. the binary input [BI_AuxContact] is energized), which means the circuit breaker is failed to be

closed.

4.3 Understand the Alarms

The hardware circuits and operation conditions of the equipment are self-supervised continuously.

If any abnormal condition is detected, information or report will be displayed and a corresponding

alarm will be issued.

A common abnormality may block a certain number of functions while the other functions can still

work. However, if serious hardware failure or abnormality were detected, all functions will be

blocked and the LED HEALTHY will be extinguished and blocking signal will be given by the

corresponding contacts outputs BO_Fail. The synchronizer equipment then cannot work normally

and maintenance is required to eliminate the failure.

NOTE: If the synchronizer is blocked or alarm signal is sent during operation, please do

find out its reason with the help of self-diagnose record. If the reason can not be found at

site, please notice the factory NR. Please do not simply press button TARGET RESET

on the protection panel or re-power on the equipment.

Table 4.3-1 Repairmen suggestion for alarms information

No. Alarm Message Meaning Description

1 Alm_RAM CPU module RAM is damaged.

2 Alm_ROM CPU module ROM is damaged.

3 Alm_EEPROM Invalid settings in any setting group

4 Alm_InvalidGrp Invalid settings in active setting group

5 Alm_Smpl_CPU CPU chip sample differs too much from DSP sampling

6 Alm_Smpl_DSP DSP chip is damaged or DSP sampling is wrong

7 Alm_Setting Settings in active group are found error after setting check in DSP chip

When No.1~No.7 above alarm messages are displayed on the LCD, the LED HEALTHY is extinguished and the LED ALARM is it. At the same time the synchronizer equipment is blocked.

8 Alm_Pwr_Opto Loss of opto-coupler power supply.



No. Alarm Message Meaning Description

9 Alm_SyncPoint Two or more synchronism points are selected or no synchronism point is selected by the operator.

10 Alm_UV_Sys System voltage is too low.

11 Alm_VTS The secondary circuit of the voltage transformer of system or generator is abnormal.

12 Alm_Fail_Cls A circuit breaker is failed to close.

When the No.8~No.12 above alarm messages are issued on the LCD, the LED HEALTHY is still on, and the LED ALARM is lit. No.8 and No.9 alarm signals can result in blocking synchronizing process and please refer to the sections 4.2.7 and 4.2.8 respectively for details.

Handling suggestion

1. Inform manufacturer for maintenance.(No.1~No.7)

2. Check the power supply in the OPT module. (No.8)

3. Check whether two or more synchronism points are selected or no synchronism point is

selected on the SCP (Synchronization Control Panel). (No.9)

4. Check the sample value, the setting, and the corresponding VT secondary circuit of the

system voltage. (No.10)

5. Check the sample value, and the corresponding VT secondary circuit. (No.11)

6. Check whether the circuit breaker is failed to close, and if it has been closed, please check the

auxiliary contact of the circuit breaker and the corresponding binary input of the contact.

(No.12)

Chapter 5 Metering and Recording



5.1 General Description

The synchronizer also provides some auxiliary functions, such as real-time data metering, binary

input status recording, event and disturbance recording, etc. All these make the synchronizer meet

the demands of the modern power grid requirements.

5.2 Metering

RCS-9659 performs continuous measurement of the analogue input quantities. The measurement

data shown below is displayed on the LCD of the synchronizer front panel or on the local or remote

PC.

Equipment samples 24 points per cycle. Calculate the RMS value in each interval and LCD will be

updated every 0.5 second. The following system quantities are displayed in RMS values of the

secondary side of CT and VT. This device has double CPU system (i.e. CPU and MON module),

so the sampled values of both modules will be displayed on LCD through different access menu.

NOTE: Ie and In mentioned in following sections are units. Ie is secondary rated current of

transformer and In is secondary rated current of CT.

Table 5.2-1 Measured values in MON module

No. Value Meaning Unit

1 Ua_S A-phase voltage of system side V

2 Ub_S B-phase voltage of system side V

3 Uc_S C-phase voltage of system side V

4 Ua_G A-phase voltage of generator side V

5 Ub_G B-phase voltage of generator side V

6 Uc_G C-phase voltage of generator side V

7 Udif Voltage difference. It equals to UGa - USa V

8 F_S System frequency (USa) Hz

9 F_G Generator frequency (UGa) Hz

10 Fdif Frequency difference. It equals to F_S - F_G Hz

11 Facc Delta of Facc. It equals to dif /dt Hz/s

12 Pdif The advance angle of the system voltage leading the generator

voltage.

13 Tcls Actual breaker closing time measured by RCS-9659 s

Path VALUES -> MEASUREMENT



Table 5.2-2 Relevant quantities of differential protection

No. Value Meaning Unit

1 (Ua_Ub)_S Phase angle between Ua_S and Ub_S

2 (Ub-Uc)_S Phase angle between Ub_S and Uc_S

3 (Uc-Ua)_S Phase angle between Uc_Sand Ua_S

4 (Ua-Ub)_G Phase angle between Ua_G and Ub_G

5 (Ub-Uc)_G Phase angle between Ub_G and Uc_G

6 (Uc-Ua)_G Phase angle between Uc_G and Ua_G

7 (US-UG)_a Phase angle between Ua_S and Ua_G

Path VALUES -> PHASE ANGLE

5.3 Binary Input

All the binary input changes are recorded in the synchronizer, and can be displayed on LCD locally

printed or sent to automation system of substation via communication channel.

Table 5.3-1 Binary input status list

No. Value Meaning

1 BI_AutoSync Binary input of enabling automatic synchronizing mode.

2 BI_SemiSync Binary input of enabling semi-automatic synchronizing mode.

3 BI_ManSync Binary input of enabling manual synchronizing mode.

4 BI_RunState Binary input of selecting running mode of the synchronizer.

5 BI_NC_SyncRly Binary input of the normally closed contact of the sync-check relay.

6 BI_NO_SyncRly Binary input of the normally open contact of the sync-check relay.

7 BI_Resv Reserved binary input.

8 BI_ManDeadChk Binary input of enabling the dead checking of the manual

synchronizing mode.

9 BI_AuxContact Binary input of auxiliary contact of a circuit breaker to be closed.

10 BI_TrigSync Binary input of manual triggering synchronism process.

11 BI_ExtBlk Binary input of external blocking signal.

12 BI_ManCls Binary input of manual closing signal.

13 BI_Pulse_GPS Binary input of GPS synchronizing pulse.

14 BI_Print Binary input of printing.

15 BI_BlkComm Binary input of blocking communication.

16 BI_RstTarg Binary input of resetting signal.

Path VALUES->BI STATE

5.4 Recording

5.4.1 General description

The RCS-9659 series provides the following recording functions:



Event recorder

Disturbance recorder

These records are displayed on the LCD of the synchronizer front panel or on the local or remote

PC. Navigate the menu to view the report through LCD screen.

5.4.2 Event recorder

Event recorder includes self-supervision report, status change of binary input report and operating

report. The equipment can store 64 records of each kind for self-supervision report and status

change of binary input report in non-volatile memory.

1. Self-supervision report

The equipment is under automatic supervision all the time. If there are any failure or abnormal

condition detected, such as, chip damaged, VT circuit failure and so on , it will be logged as an

event.

2. Status change of binary input report

When there is binary input is energized or de-energized, i.e., its state has changed from 0 to 1

or from 1 to 0, it will be logged as an event r.

3. Tripping reports

When a synchronizing process is triggered and a circuit breaker is closed, than a report

[Op_Clsed_CB] will be recorded as an event.

5.4.3 Disturbance recorder

RCS-9659 can save 24 pieces of waveforms of synchronizing operations. If a new synchronizing

operation occurs when 24 waveform records have been stored, the waveform of the first type of

fault report will be overwritten, and then the latest waveform record will overwrite the oldest one if

another new fault waveform is generated again. The synchronizer stores actual samples that are

taken at a rate of 24 samples per cycle. Besides the voltage waveform, binary inputs state and

measurement magnitudes are all recorded.

There are the following two ways to initiate RCS-9659s oscillographic process to records 8 cycles

waveforms before the initiating time and 2 cycles after the initiating time.

(1) Being initiated by the binary input [BI_AuxContact]

If the logic setting [En_AuxContact] is set as 1, oscillographic process will be initiated to record

waveforms when [BI_AuxContact] rises from 0 to 1, i.e. the time when breaker is closed.

(2) Being initiated by a time delay [t_Cls_CB]

If the logic setting [En_AuxContact] is set as 0, oscillographic process will be initiated to record

waveforms after a delay (i.e. setting [t_Cls_CB]), and the delay timer begins to time since

RCS-659 issuing a closing command to circuit breaker.

Chapter 6 Hardware Description



6.1 Overview

Modular structured digital synchronizer RCS-9659 is IEC 4U high and 19 wide and adopts an

integral faceplate.

Front panel and rear panel are shown in Figure 6.1-1 respectively.

RCS974AGTRANSFORMER AUXILIARY RELAY

HEALTHY

ALARM

SYNC

f

U

CLOSE

TARGET RESET

AUTO SYNCHRONIZER

NANJING NARI-RELAYS ELECTRIC CO., LTD

RCS9659

f

U

Figure 6.1-1 Front Panel of RCS-9659

OUTDC220V AC LPF CPU COM SIGSIGOPT OUT OUT OUTOUT OUT OUTOUT OUT OUT

K

DC

J

AC

F

COM

1

OUT

2

OUT

3

OUT

4

OUT

5

OUT

6

OUT

7

OUT

8

OUT

9

OUT

A

OUT

B

SIG

C

SIG

E

OPT

G

CPU

H

LFP

No.

Module

Figure 6.1-2 Rear View of RCS-9659

The digital synchronizer RCS -9659 comprises 8 plug-in modules as described in follow sections.

RCS-9659 comprises the following 18 plug-in modules. Figure 6.1-2 is rear view of the equipment

and shows disposition of these modules.

Table 6.1-1 Hardware configuration



No. Module Description

1 OUT Synchronism operating module

2 OUT Synchronism operating module (optional)








A OUT Synchronism operating module (optional)

B SIG Signal output module

C SIG Signal output module

E OPT Binary input opto-coupler module

F COM Communication module

G CPU Control nucleus of the equipment

H LFP Low-pass filter

J AC AC current and voltage input module

K DC DC power supply module

No.1~No.A OUT modules are configured according to the requirement of the applied-specific

project.

6.2 Plug-in Modules

6.2.1 DC Module (No.K DC)

DC power supply (250V/220V/125V/110 V) shall be connected to terminals K01(+) and K02 (-).

Through interference filter and power switch on the rear, DC/DC converter converts the DC power

supply to three voltage class +5V, 12V and +24V to supply to other modules of the equipment.

Terminal K04 (+) and terminal K05 (-) output 24V as power supply of OPT. Terminal K06 is surge

ground. The following figure shows rear view and connections of DC power supply module.



102

101

104

105

106

To other

modules To 24V OPT module

Ground

From DC power supply

DC/DC

5V

12V

24V

Inte

rfere

nce filt

er

101

102

103

104

105

GND

DC

1

106

Pwr +

Pwr -

Opto L -

Opto L +

+

Figure 6.2-1 Rear View and Connections of DC Module

WARNINGIt is only permitted to withdraw or insert the DC module or some other

modules when the auxiliary power is switched off.

6.2.2 AC Module (No.J AC)

Figure 6.2-2 shows rear view and typical connections of AC module.



A

B

C

To LPF

52G

n01

n02

n03

n04

n28(26)

n05

n06

n07

n08

from other OUT boardBUS

J05

J09

J13

J01

To LPF

n09

n10

n11

n12

n13

n14

n15

n16

from other OUT board

J21

J25

J29

J17

AC

J01

Syste

m V

oltage Input

J02

J03 J04

J05 J06

J07 J08

J09 J10

J11 J12

J13 J14

J15 J16

J17 J18

J19 J20

J21 J22

J23 J24

J25 J26

J27 J28

J29 J30 Genera

tor

Voltage Input

OUT board AC board

Syste

m V

oltage Input

Genera

tor

Voltage Input

Ub_S

Uc_S

Ua_S

Un_S

Ua_G

Ub_G

Uc_G

Un_G

Figure 6.2-2 Rear View and Typical Connections of AC Module

Both generator voltage and bus voltage on both sides of the breaker are inputted together, and

have a nominal rating of 100V or 100V/3V at 50/60Hz. As illustrated in Figure 6.2-2, secondary

voltage from voltage transformer (VT) on both sides of circuit breaker first enters into OUT board,

then passes a selective switchover circuit (remotely or locally controlled by terminal n26 (n28)).

After that, only one group of system voltage and generator voltage comes into No.J, the AC board.

Small VTs built in AC board provide isolation and converts the secondary voltage from VT to a

synchronizer acceptable level and then transfer it to LPF board for filtering. Following the low-pass

filter circuits, the analog signals enter into well-designed precise phase detecting circuit and high

accurate A/D converter. Then DSP will calculate the voltage, frequency and phase angle and

check the synchronism conditions independently. If RCS-9659 is configured to work as

synchronism checking mode, the breaker can be closed only when synchronism conditions are

met which is judged by DSP. The AC signal flow graph is proposed in Figure 6.2-3.



AC

board

LPF

board

CPU

board

OUT

board

52

GP

ow

er

Gri

d

BU

S

Figure 6.2-3 AC Signal Flow Graph

Furthermore, there is an earthing terminal on AC board. It shall be connected to station ground

grid.

NOTESince RCS-9659 calculates synchronism conditions according the voltages

inputted via channels Ua_S and Ua_G, these two channels must be led with appropriate

voltages.

DANGERNever allow the VT secondary circuit connected to the AC board or OUT board

to be short circuit while the primary system is live. Short the VT circuit will produce a

dangerously strong current.

6.2.3 LFP Module (No.H LFP)

This module is used to filter high frequency disturbance from the AC signal, regulate the input level

and provide an interface between the equipment and dedicated test instrument HELP-90A

developed by NR.

From module AC

From HELP-90AMeasurement in DSP Low-pass filterAdder

Figure 6.2-4 Block Diagram of LFP Module

6.2.4 CPU Module (No.G CPU)

Module CPU, control nucleus of the equipment, comprises monolithic micro controller CPU and

digital signal processor DSP. CPU finishes the following functions:

1 General fault detection



2 Event recorder and disturbance recorder (could be printed via serial port)

3 Print and communication with HMI

4 Communication with the host of SCADA system of the substation

DSP finishes the following functions:

5 Algorithm and logic of protection

Sampling rate of the equipment is 24 points per cycle. Parallel real time data is calculated for

algorithm and logic of protection at every sampling point. Hence, very high inherent reliability and

security are ensured.

6.2.5 COM module (No.F COM)

Module COM performs connection between the equipment and the SCADA system or RTU. Three

types are available.

To SAS

To SAS

To GPS for clock synchronism

To printer or controller

Type 5A

COM

7

8

9

1

2

3

4

5

6

10

11

12

RS-485 1A

RS-485 1B

Printer RX

Printer TX

Printer Ground

RS-485 1GND

RS-485 2A

RS-485 2B

RS-485 2GND

RS-485 A

RS-485 B

RS-485 GND

PORT 1 PORT 2 PORT 3 PORT 4

Type

Physical Layer

RS-485 RS-485 RS-485 RS-485/RS-232

Twisted pair wire Twisted pair wireTwisted pair wire Twisted pair wire

Figure 6.2-5 Rear view of type A and external connections of COM module

Optic Fibre

Optic Fibre



To SAS

To SAS

RS-485 A

RS-485 B

RS-485 GND

Printer RX

Printer TX

Printer Ground

1

2

3

4

5

6

Op.Fib.RX1

Op.Fib.TX1

Op.Fib.RX2

Op.Fib.TX2

Type 5B

COM

TX

TX

RX

RX


Type

Physical Layer

RS-485 RS-485 RS-485 RS-485/RS-232

Optic fibre Twisted pair wireOptic fibre Twisted pair wire

Figure 6.2-6 Rear view of type B and external connections of COM module





1

2

3

4

5

6

7

8

9

RS-485A

RS-485B

RS-485GND

RS-485A

RS-485B

RS-485GND

Printer RX

Printer TX

Printer Ground

To SAS

To SAS

To SAS

To SAS

To SAS

Ethernet 1

10/100 TX

Ethernet 4

10/100 TX

Ethernet 3

10/100 TX

Ethernet 2

10/100 TX

Type 5E

COM


Type

Physical Layer

Ethernet Ethernet Ethernet RS-485

Twisted pair

wire

Twisted pair

wire

Twisted pair

wire

Twisted pair

wire

PORT 5

RS-485/

RS-232

Twisted pair

wire

PORT 6 PORT 7

Ethernet RS-485

Twisted pair

wire

Twisted pair

wire

Figure 6.2-7 Rear view of type E and external connections of COM module

All ports used to communicate with SAS support IEC60870-5-103 protocol, moreover, Ethernet

port in COM modules of type 5E also supports IEC61850. From Figure 6.2-5 to Figure 6.2-7 shows

rear view of these types and their external connections.

All types are equipped with a RS-485 port for receiving second pulse signal (PPS-pulse per

second) from GPS and a port for printer. Printer port could be configured as RS-232 or RS-485 by

setting corresponding jumpers on the PCB (RS-232 default). If logic setting [En_Net_Print] is set to

1, printer port must be set as RS-485. Transmission rate of printer port can be set by the setting

[Printer_Baud] and should be the same with baud rate of the printer.

NOTE: For the port used to printer or controller, it can be configured as RS-485 or RS-232

by setting corresponding jumper of module COM. The port is configured as RS-232 by

shorting PIN 1 and PIN 2 and as RS-485 by shorting PIN 2 and PIN 3. As shown in Figure

6.2-8

PIN 1 PIN 2 PIN 3

RS-232RS-485

Figure 6.2-8 Print Port Configuration

There are three options to finish time synchronization:

1 Receiving PPS (pulse per second) and PPM (pulse per minute) via external contact

2 Receiving PPS, PPM and I

Documents

RCS-9659_X_Instruction Manual_EN_Domestic General_X_R1.02_(EN_DYBH0319.0086.0003).pdf