Capacitor Protection Relays and Monitoring Device

Zhuhai Wanlida Electric Co., Ltd. http://www.zhwld.com

User’s Manual for MCPR-610Hb capacitor

protection and monitoring device

Prepared by：

Proofed by：

Approved by：

Document No.: WLD [K]-JY-222-2010 Version No.: V2.03.01

Date of publication: Oct ,2010

Copyright: Zhuhai Wanlida Electric Co., Ltd.

Note: Our company reserves the right to modify this manual. For any inconsistency

between the product and this manual, please contact us for relevant services.

Technical support hotline: 0756-3395398 Fax: 0756-3395500

User’s Manual for MCPR-610Hb capicitor protection and monitoring device WLD[K]-JY-222-2010

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F o r e w o r d

1. Model description

The structural type of the MCPR-600Hb series protection is Hb. MCPR-610Hb

supports A, B, C three-phase current protection, also supports A, C two-phase

current protection. When ordering, please statements.

2. Standards referenced

General specification for static protection, security and automatic equipment, DL

478-2001

Technical code for relaying protection and security automatic equipment

GB/T 14285-2006

Protective relay and automatic equipment design rules of power eequipment

GB50062-92

3. Caution

Negative sequence voltage involved in this series of protection is combined with

phase voltage, all of low voltage component depend on line voltage in compound

voltage block, if one of the three line voltages is lower than low voltage setting, low

voltage component will operates and unblock over current protection.

There are 4 standard curves of inverse protection involved in this series of protection,

if the fault current is higher than 15 times of rated current, the inverse protection

component as if the current is 15 times of rated current.

The appearance should be inspected before power is applied, to ensure that the

panel is OK without scratch, the screws are tightened, the device is grounded firmly,

all screws of plug-ins are tightened and in good contact.

When power is applied, the “Run” indicator on the panel should flash, digital tube

displays primary measuring result in cycle, protection and measuring data are

displayed on the lcd in cycle.

The terminal D25～D28 are measuring circuit of 4～20mA DC signal, when testing,

signal should be supplied by special equipment, direct apply signal of relay protection

tester is prohibited. (Can be selected or not)

When the device is equipped with ungrounded system, terminal D07，D08 are zero

sequence small current input terminal, the ac current input should be limited to within

2A, the measuring current input should be limited to 6A, pay attention to the signal

input when testing to avoid large signal applied so as to avoid damage to

components.


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Operating circuit inside the device is only applicable to DC power supply, if AC power

is used, it should be applied with rectifier and filter.

It is prohibited to plug or unplug the plug-ins, in order to avoid damage to the device.

It is prohibited to do digital output test when the device is running with primary

equipments.


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1. Product description

1.1 Scope of application

MCPR-610Hb microcomputer capacitor protection and monitoring device applies to

protection and monitoring devices for parallel capacitor banks in single Y, double Y, Δ

wiring in systems not directly grounded or grounding via resistor with voltage ratings of

below 110kV. It can be installed in site on the switchgear.

1.2 Function and specification

1.2.1Protective function

2-section definite time limit over-current protection(Two-step OC)

Zero sequence overcurrent protection(ZS Overcurrent)

Imbalanced current protection(Imbalance C)

Imbalanced voltage protection(Imbalance V)

Overvoltage protection(Overvoltage)

No-voltage protection(No-voltage)

Body protection（Body Protect）

PT Failure

Non-electric quantity protection（2 ways）(Non-electric) (Can be selected or not)

1.2.2Auxiliary functions

Harmonic spectrum analysis

Phase display

Small current grounding wire selection

Integral energy and Pulse energy(Pulse energy can be selected or not)

Device self-test failure alarm

Protection settings remote call up and modify

Fault oscillograph capture

One or two programmable 4 ~ 20mA output

Provide ethernet print function(manual print setting value, manual/auto print reports)

(Can be selected or not).

1.2.3measuring and control functions

Power measurement（ remote measurement）： Voltage, current, active power,

reactive power, active energy, reactive energy, power factor, power grid frequency,

non-electric quantity measurement(Can be selected or not) and so on.

Remote signal: 15 binary inputs, including: 12 for outside collection, 3-way for the

internal collection.

1.2.4Communication capability

2 standard RS485 multipoint communication ports


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2 industrial Ethernet ports(Can be selected or not)

Supports single, dual network communication, it is fully qualified for network

redundancy and backup

IEC-60870-5-103（RS485 communication mode ）、 IEC-60870-5-104（ industrial

Ethernet mode） standard communication protocol(Can be selected or not)

1.2.5 GPS clock synchronization function (Can be selected or not)

The device is able to receive GPS clock minute synchronization (or second

synchronization) through RS485 differentiate voltage, and it can be done with

monitoring system to accomplish GPS precise clock synchronization.

1.2.6 Device specifications

32-bit DSP microprocessor

Real-time multi-task operating system and C++ program techniques, realizing online

programming

Double-screen display (LCD Chinese display and nixie tube display), easy for

inspection

One or two ways 4~20mA DC quantity output, which can be set flexibly as any

corresponding electric quantity (such as current, voltage, power, frequency, etc.)

Collecting 2 ways of 4~20mA DC quantities for measurement of non-electric

quantities, such as temperature, pressure, and realizing online monitoring(Can be

selected or not)

Having the electric energy quality analysis function and perfect harmonic analysis

function

Integrating perfect metering functions

Excellent hardware interchangeability, easy user maintenance and reduced quantity

of spare parts

Protection output relays can be configured flexibly for user convenience

With remote/local changeover switch and trip/closing buttons, reducing the number of

elements on the board/cabinet panel and simplifying wiring

Using a 6U, 19/3” standard enclosure in a rear plug-in structure; the device can be

installed in site on a switchboard or combined in a centralized manner

1.2.7 Main technical specifications

Rated data Power supply: DC/AC 86~265V

Operating voltage: DC 220V or DC 110V

AC voltage: 100/ 3 V or 100V

AC current: 5A or 1A

Frequency: 50Hz

Power consumption


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DC circuit: <10W (normal operation); <15W (protection operation)

AC voltage circuit: <0.5VA/phase

AC current circuit: <1VA/phase (In = 5A); <0.5VA/phase (In = 1A).

Overload capability AC voltage circuit: 1.2Un, continuous operation

Current measuring circuit: 1.2Un, continuous operation

Protective current circuit: 2In, continuous operation

10In, allowing 10s

40In, allowing 1s

Range and error of setting value

Maximum range of setting value:

Voltage element: 1V~120V

Current element: 0.1In~20In

Frequency: 45.00Hz~55.00Hz

Timing element: 0.00s~100.00s

Error of setting value:

Current and voltage setting value: ≤±3% of setting value

Frequency setting value: ≤±0.02Hz

Slip error setting value: ≤±5% of setting value

Angle setting value: ≤±2°

Whole-group operation time (including relay’s intrinsic time):

Intrinsic operating time of current instantaneous over-current protection:

not greater than 40ms at 1.5 times the setting value

Intrinsic operating time of Difference instantaneous over-current

protection: not greater than 30ms at 2 times the setting value

Measuring accuracy AC current: Class 0.2

AC voltage: Class 0.2

4~20mA DC quantity input: ≤±1%

Power: Class 0.5

Integral energy: Class 1 (active), Class 2 (reactive)

Frequency: ≤±0.02Hz

SOE resolution: ≤2ms

Pulse width of pulse quantity: ≥10ms

4~20mA DC quantity output: ≤±1%

Capacity of trip/closing output contact

Can be connected to DC 250V, 8A for prolonged periods.

GPS clock synchronization error

Clock synchronization error≤2ms

Environmental conditions


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Ambient temperature:

Operating：-20℃～+55℃。

Storage：-25℃～+70℃, rainproof and snow-proof rooms with relative humidity not

greater than 80%, ambient air free of acid, alkaline or other corrosive and explosive gas;

no excitation quality is applied under the limits, the device shall not have any irreversible

change; after temperature restoration, the device shall operate properly.

Relative humidity: The average relative humidity of the most humid month shall not

be greater than 90% monthly, the average minimum temperature of this month not lower

than 25℃ and there shall be no surface condensation; at the highest temperature of

+40℃, the average maximum humidity shall not exceed 50%. Atmospheric pressure: 80kPa~110kPa (below relative altitude of 2wc)

1.2.8 Hardware structure

The device uses a 6U, 19/3” standard enclosure, with aluminum alloy casing and

installed by overall embedding. The display panel is mounted in the front, and the other

plug-in modules are rear mounted. From the rear view, the power, I/O, CPU and AC

plug-in modules are from the left to the right.

External dimensions and boring diagram

Structural and dimensional diagram Boring diagram for installation

Devices fabricated on-screen steps: first release on-screen stents unfastening

screws, remove the stents; installed the device on the screen from the front and push

until close to the fixed plate; install the stent 2, and then stent 1, and then use fastening


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screw to insertion hole from rear of stent1, and then screwed into stent 2 and tighten

screw; the stents from up and down are installed in the same way; use grounding screws

to connect grounding line.


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2.Function of the device

2.1 2-section definite time limit over-current protection (Two-step OC)

This device has 2 sections of definite time limit over-current protection, the current

and time setting values of each section can set separately, please set the control word to

put this two section protections on or off respectively. The protection operation logic is

shown in figure 2-1.

Figure2-1 Operation logic of definite time limit over-current protection

2.2 Zero Sequence Overcurrent Protection(ZS Overcurrent)

A one-section definite time limit zero sequence over-current protection is provided,

which can be set as trip or alarm. When two functions are all switched on, trip function is

elected and alarm function is released automatically. The operation logic is shown in

Figure 2-2.

For ungrounded systems, when a ground fault occurs in the system, the zero

sequence current of the ground fault point is basically a capacitive current with small

amplitude. If a zero sequence over-current relay is used for protecting it from ground

faults, its selectivity can hardly be guaranteed. The device uploads the amplitude and

direction of the zero sequence current by communication, and the upper computer

performs low current ground wire selection. When PT wiring is YY or there is a PT

failure(PT failure function should be switched on),the flag of state change shouldn’t be

transmitted.

Figure 2-2 Operation logic of zero sequence overcurrent protection

2.3 Imbalance Current Protection(Imbalance C)

To reflect any internal breakdown in the capacitor bank, the unbalanced current

protection is provided, whose operation logic is shown in figure 2-3.

Figure 2-3 Operation logic of imbalanced current protection

&≥1

T

Definite time overcurrentIa≥overcurrent setting valueIb≥overcurrent setting value

Ic≥overcurrent setting value

Protection output sequence

TsetOutput sequence

Io>Iset ON/OFF

TsetOutput sequence

Ip>Iset ON/OFF


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2.4 Imbalance Voltage Protection(Imbalance V)

The protection operation logic is shown in figure 2-4.

Figure 2-4 Operation logic of imbalanced voltage protection

2.5 Overvoltage protection(Overvoltage)

To prevent capacitor damage due to the system’s steady-state over-voltage, an

over-voltage protection is provided, which can be set as trip or alarm respectively. When

both are switched on, the trip function is selected and the alarm function is released

automatically. The protection operation logic is shown in figure 2-5.

Umax=Max{ Uab，Ubc，Uca}

Figure 2-5 Operation logic of overvoltage protection

2.6 No-voltage Protection(No-voltage)

To avoid system fault where the bus is de-energized and then re-energized by line

closing, so that the capacitor bank is damaged by closing over-voltage, the device is

provided with the no-voltage protection. The protection operation logic is shown in

Figure2-6.The no-voltage protection is set to select whether it is blocked by current

(blocked when the current is greater than the setting value), to avoid protection

mis-operation in case of PT failure.

Imax=Max{ Ia，Ib，Ic }

Figure 2-6 Operation logic of no-voltage protection

2.7 Body protection（Body Protect）

The device has 4 body protection and delay outputs, which are heavy gas trip, light

gas alarm, over-temperature trip and temperature alarm, the delay time and On/Off can

be set separately.

TsetOutput sequence

Up>Uset ON/OFF

TddyOutput

sequenceON/OFF

&

Umax>Uset

Circuit breaker at closing position

T Output

sequence

No - voltage protection

ON / OFF &

Circuit breaker at closing position

PT failure PT failure block

Umax < Ushy

Imax < Ibs

No - voltage current block


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2.8 PT Failure

PT failure criterions are different according as different wiring modes. It will block

under-voltage protection, compound voltage component and current directional

component. PT failure criterions are as follows:

V-V wiring mode

The current value of the phase with the maximum current is less than the maximum

load current(use the setting value of overload current).

① Maximum phase-phase voltage < 30V, and current of any phase > 0.1In;

② Negative sequence voltage > 8V.

If any of the above conditions is met, the delay (settable) will report PT failure, and

will return when failure disappears.

Y-Y wiring mode

The current value of the phase with the maximum current is less than the maximum

load current (use the setting value of overload current).

① When |Ua+Ub+Uc| >7V, and the modulus difference between the maximum and

minimum line voltages is greater than 18V, single-phase or 2-phase failure occurs;

② |Ua+Ub+Uc| >7V, the minimum line voltage is less than 18V, used for detecting

2-phase failure.

③ When MAX{Uab, Ubc, Uca}<7V, and the current of any phase > 0.1In, it is

regarded as PT 3-phase failure.

If any of the above conditions is met, and the time delay reached, the device

reports PT failure, the alarm will return when failure disappears.

Figure 2-7 PT failure judgment logic

PT failure operation information

&

TPT

PT failure ON/OFF

|MaxU-MinU|>18V

&MinU<18V

&

MaxU<7V MaxU=Max(Uab,Ubc,Uca)MinU=Min(Uab,Ubc,Uca)

&

MaxU<30V

U2>8V

≥

&V-V wiring

Max{Ia,Ib,Ic}>0.1*In

≥

Max{Ia，Ib，Ic}<Igfh

&

≥

&

Max{Ia,Ib,Ic}>0.1*In

7V|cUbUaU|

7V|cUbUaU|

PT failure element


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2.9 Non-electric quantity protection（4-20mA input, this function is optional.

If do not choose ,the corresponding DCS input content in terminal

diagram has no meaning）(Non-electric)

The device has the 2-way non-electric quantity protection function, switched on/off by

control word.

2.10 Pulse energy/integral energy(Pulse energy can be selected or not)

Pulse energy

The pulse circuit of the device uses an internal power supply; passive energy pulses

are input from the outside; and accumulation of pulse energy is finished by the software.

Integral energy

The software accumulates active and reactive powers into active and reactive

energy in real time.

2.11 Wave Recorder

See the communication coding table for the protection voltage and current

waveform data collected by the recording unit.


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3.Setting of parameters and setting values of the device

3.1 System parameters

Parameter Range Description

Settings of setting value zone number（Setting Zone No.）

Setting value zone

number(Setting

Zone No.)

0-7 Set step:1（factory default 0）

Communication settings（Comm. Setting）

RS485

address(RS485

Address)

1-99 Set step:1（factory default 1）

RS485 baud

rate(RS485

Baudrate)

0-5

Set step:1（factory default 1）

0：2.4KB；1：4.8KB；2：9.6KB；3：19.2KB；4：38.4KB；

5：115.2KB；

Pulse confirmation

time(Pulse Input

Time)

1-1000ms Set step:1（factory default 1）

IP address(IP

Address)

It has four

sections. The

range of every

section is

0-255

One section set step:1（factory default 192.168.6.117）

Subnet mask

(Subnet Mask) One section set step:1（factory default 255.255.255.0）

KW default

value(KW Default) One section set step:1（factory default 8.168.6.1）

Setting of basic parameters(B.Parameters)

Rating Current（In） 0-1 Set step: 1 (factory default 0) 00: 5A; 01: 1A

PT Ratio 1-1500 Set step: 1 (factory default 1)

CT Ratio 1-5000 Set step: 1 (factory default 1)

CT Wiring Mode 0-1 Set step: 1 (factory default 0) 00: 3-phase; 01: 2-phase

PT Wiring Mode 0-1 Set step: 1 (factory default 0) 00: Y-Y; 01: V-V

Harmonic Channel 0-12

For harmonic calculation, select the corresponding

reference quantity:

0: exit from harmonic calculation function


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MCPR-610Hb:

1:Ia,2:Ib,3:Ic,4:I0,5:IA,6:IB,7:IC,8:Ua,9:Ub,10:Uc,11:U

P，12：IP

Wave Record 0-1 1/0: On/Off (factory default Off)

Earth Mode 0-2 00：ungrounded 01：grounded

D/A channel setting(D/A Setting)

DA1~2 Channel

Selection 0-14

Select DA1~2 to output corresponding reference

quantities:

0: No D/A output 1:IA, 2:IB, 3:IC, 4:Ua, 5:Ub, 6:Uc,

7:Uab, 8:Ubc,9:Uca,10:P,11:Q

Voltage reference quantity: 0-120V corresponding to

4mA-20mA.

Rating 5A：

Current reference quantity: 0-6A corresponding to

4mA-20mA,

Power reference quantity: 0-1000W corresponding to

4mA-20mA.

Rating 1A：

Current reference quantity: 0-1.2A corresponding to

4mA-20mA,

Power reference quantity: 0-200W corresponding to

4mA-20mA.

DA1～2 Adjustment

Factor 0.5-1.5 Adjust D/A channel 1～2（4-20mA） parameters

Pulse Energy

Pulse 1 0-4294967295 Set step: 1

Press “confirm” for reservation, and revert to last

menu.

Pulse 2 0-4294967295

Pulse 3 0-4294967295

Pulse 4 0-4294967295

Positive active

energy

0-4294967.295

kWh

Set step:0.001

Press “confirm” for reservation, and revert to last

menu.

Positive reactive

energy

0-4294967.295

kvh

Negative active

energy

0-4294967.295

kWh

Negative reactive 0-4294967.295


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energy kvh

Opening Count Clearing (Trip Times Clear)

Press “confirm” for reservation, and revert to last menu.

Channel factor setting(Channel Coef.)

Channel data 1～12 0.5-5

Set step:0.001（factory default 1）

Channel data 1-12 are corresponded to the channel

factor of analog quantity 1-12.

Channel data 13～

14 0.5-5

Set step:0.001（factory default 1）

Channel data 13,14 are corresponded to channel

factor of DC quantity 1,2.

3.2 List of setting values

Setting value Range Description

Pro

tect

ion O

n/O

ff w

ord

Instantaneous Protect

(Inst.PROT) 1/0 1/0: On/Off (factory default Off)

Delay Instantaneous Protect

(DT Overcurrent) 1/0 1/0: On/Off (factory default Off)

Zero Sequence Overcurrent

Alarm (ZS OC Alarm) 1/0 1/0: On/Off (factory default Off)

Zero Sequence Overcurrent

Trip (ZS OC Trip) 1/0 1/0: On/Off (factory default Off)

Overvoltage Alarm (Overvoltage

ALM) 1/0 1/0: On/Off (factory default Off)

Overvoltage Trip 1/0 1/0: On/Off (factory default Off)

No-voltage Protect

(No-voltage Trip) 1/0 1/0: On/Off (factory default Off)

No-voltage Current Lock

(NV Current Lock) 1/0 1/0: On/Off (factory default Off)

Heavy Gas Protect

(Heavy Gas Trip) 1/0 1/0: On/Off (factory default Off)

Light Gas Alarm 1/0 1/0: On/Off (factory default Off)

Over Temperature Trip

(Over Temp. Trip) 1/0 1/0: On/Off (factory default Off)

Temperature Alarm

(Temperature ALM) 1/0 1/0: On/Off (factory default Off)


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Non-electric Quantity 1

Protection (Non-electric 1) 1/0 1/0: On/Off (factory default Off)

Non-electric Quantity 2

Protection (Non-electric 2) 1/0 1/0: On/Off (factory default Off)

PT Failure Alarm 1/0 1/0: On/Off (factory default Off)

PT Failure Lock 1/0 1/0: On/Off (factory default Off)

Imbalance Voltage Protect

(Imbalance V PROT) 1/0 1/0: On/Off (factory default Off)

Imbalance Current Protect

(Imbalance C PROT) 1/0 1/0: On/Off (factory default Off)

2-section definite time limit over-current protection(Two-step OC)

Instantaneous Current

(Inst.Current) （0.1－20）In

Set step:0.01A(factory default

20In)

Definite Time Overcurrent

(DT Overcurrent) （0.1－20）In

Set step:0.01A(factory default

20In)

Instantaneous Time

(Inst.Time) 0.00-100.00s

Set step:0.01s(factory default

100s)

Definite Time Overcurrent Time

(DT OC Time) 0.00-100.00s

Set step:0.01s(factory default

100s)

ZS Overcurrent

Zero Sequence Overcurrent Value

(ZS OC Value) 0.00-2.00A

Set step: 0.01A (factory default

2A)

Zero Sequence Overcurrent Time

(ZS OC Time) 0.00-100.00s

Set step: 0.01s (factory default

100s)

Imbalance V

Imbalance Voltage (Imbalance V) 2－100V Set step: 0.01V (factory default

100V)

Imbalance Voltage Time

(Imbalance V Time) 0.00-100.00s

Set step: 0.01s (factory defaul t

100s)

Imbalance C

Imbalance Current (Imbalance C) (0.1-20) In Set step: 0.01A (factory default

20In)

Imbalance Current Time

(Imbalance C Time) 0.00-100.00s


100s)

Overvoltage

Overvoltage Value (Overvolt. Value) 50－120V Set step: 0.01V (factory defaul t

50V)


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Overvoltage Time (Overvolt. Time) 0.0-100.00s Set step: 0.01s (factory defaul t

100s)

No-voltage

No-voltage Value 5－100V Set step: 0.01V (factory defaul t

50V)

No-vol tage Current Lock

(NV Current Lock) 0－10.00A Set step: 0.01A (factory default 2A)

No-voltage Time 0.50-100.00s Set step: 0.01s (factory defaul t

100s)

Body protection(Body Protect)

Heavy Gas Time 0.0-100.00s Set step: 0.01s (factory defaul t

100s)

Light Gas Time 0.0-100.00s Set step: 0.01s (factory defaul t

100s)

Over Temperature Time

(Over T Time) 0.0-100.00s


100s)

Temperature Alarm Time

(Temp. Alarm Time) 0.0-100.00s


100s)

PT Failure

PT Failure Time 0.50-10.00s Set step: 0.01s (factory defaul t 10s)

Peakload Current （0.1－2）In Set step: 0.01A (factory default 1In)

Non-electric

Non-electric quantity 1 Value

(Non-elec.1 Value) 4.00-20.00mA

Set step: 0.01mA (factory default

20mA)

Non-electric quantity 2 Value

(Non-elec.2 Value) 4.00-20.00mA

Set step: 0.01mA (factory default

20mA)

Non-electric quantity 1 Time (Non-elec.1

Time) 0.00-100.00s


0s)

Non-electric quantity 2 Time (Non-elec.2

Time) 0.00-100.00s


0s)


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4.Description of binary input, output and analog quantity

4.1 Monitoring of analog quantities

Analog quantities can be monitored under the [Protection Data Display], [Measured

Data Display] and [Pulse Energy] menus in the [State Display] menu, press the ““,

““ keys to flip over. The factory precision of the device has been calibrated. The

protection current is calibrated at double the rated current and the measuring current at

a single rated current. The list is as follows:

Analog quantity

terminal

Analog quantity

name Test method

Terminals D01, D02 Protection Phase A

current (Ia)

Add double the rating, displayed deviation not

exceeding 1%

Terminals D03, D04 Protection Phase B

current (Ib)


exceeding 1%

Terminals D05, D06 Protection Phase C

current (Ic)


exceeding 1%

Terminals D07, D08 Zero sequence

current (I0)

Add 1A, displayed deviation not exceeding

0.2%

Terminals D09, D10 Measurement

Phase A current (IA)

Add a single rating, displayed deviation not

exceeding 0.2%


Phase B current (IB)


exceeding 0.2%


Phase C current (IC)


exceeding 0.2%

Terminals D15, D16 Phase A voltage

(Ua)

Add 50V, displayed deviation not exceeding

0.5%

Uab F system frequency Add 50V 50Hz, displayed deviation not

exceeding ±0.02Hz

Terminals D17, D18 Phase B voltage

(Ub)


0.5%

Terminals D19, D20 Phase C voltage

(Uc)


0.5%

Terminals D21、D22 Unbalance

voltage(Up)


0.5%

Terminals D23、D24 Unbalance

current(Ip)


exceeding 1%

Terminals D25, D26 4~20mA DC Input 1 Add 10mA, displayed deviation not exceeding

3%

Terminals D27, D28 4~20mA DC Input 2 Add 10mA, displayed deviation not exceeding

3%


-18-

Analog quantity

terminal

Analog quantity

name Test method

Add current to Terminals

D09, D10; D13, D14 by

polarity; Add voltage to

D15, D16; D17, D18;

D19, D20 by polarity

3-phase active

power

Add a single rating to current and 100V to line

voltage

Alter phase angle, displayed power deviation

not exceeding 0.5%

Add current to Terminals

D09, D10; D13, D14 by

polarity; Add voltage to

D15, D16; D17, D18;

D19, D20 by polarity

3-phase reactive

power

Add a single rating to current and 100V to line

voltage

Alter phase angle, displayed power deviation

not exceeding 2%

Terminal C12 to Terminal

C16 (common terminal of

pulse +24V)

Pulse 1 (MC1) Connect each point once, add 1 to the count



pulse +24V)




pulse +24V)




pulse +24V)


4.2 Monitoring of binary input

Binary input can be monitored under the [Binary input] menu in the [State Display]

menu, press the ““, ““ keys to flip over.

Terminals of

contact input Name of binary input Checking method

B01

Common terminal of binary

input -

（Used for connecting with the

negative pole of external

power DC220V and DC110V）

External power supply of 220V or 110V

DC can be applied, connect the

negative terminal to terminal B01,

positive terminal to terminal B02～B13,

in [Binary input] menu in the [State

Display], the status of binary input can

be seen.

The device also has a 24V DC

supply, if it is used, terminal B14 can be

connected to terminal B02 ～B13, in

[Binary input] menu in the [State

Display], the status of binary input can

B02 Breaker

B03 Trolley Run

B04 Trolley Test

B05 Earth Switch

B06 Spring

B07 Heavy Gas

B08 Light Gas


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B09 Over T Trip be seen.

Please note about the binary input

voltage upon ordering, it is set to

DC220V by default.

B10 Temp. Alarm

B11 Input 10

B12 Input 11

B13 Input 12

B14 Self-producting DC+24V

4.3 Monitoring of binary output

Binary output can be monitored under the [Binary output] menu, press the ““, “ “ keys

to flip over.

Terminals of contact

output

Name of binary

output Checking method

B15-B16 Device Failure

Select open and close menu, use “+”,

“-” key to operate and test the

corresponding terminals. B31-B32

and B34-B35 are common open

terminals that should close.

B17-B18 Trip Signal

B19-B20 Alarm Signal

B21-B22 Output 4

B23-B24 Output 5

B25-B26 PROT Output 1

B27-B28 PROT Output 2

B29-B30 Output 8

B31-B32（common open） Output 9

B32-B33

B34-B35（common open） Output 10

B35-B36

A22-A23 Remote Trip

A22-A24 Remote Close


-20-

5.Operation instructions

5.1 Control panel of device

128*64 matrix LCD (The LCD will go off after a period of absence of keyboard

operation; the LCD will be illuminated automatically when any key is pressed or in

case of protection trip or alarm.)

Signal indicator: operation, communication, operation, alarm, backup, fault (of the

device)

Circuit breaker state indication: indicating the current state of the circuit breaker

(“Open”, “Close” position indication)

Remote/local selection signal, local opening/closing button

Key pad: , , , , Cancel, -, +, Enter, Revert

The 6-bit nixie tube displays the primary measured values in real time: IA, IB, IC, Uab,

Ubc, Uca, P, Q, Cosφ. (Please set the PT, CT transformation ratios properly in the System

Parameters menu). The maximum display range of the power on the nixie tube is: 99999. Note: Measurement IA: AA, measurement IB: bA, measurement IC:

CA, voltage Uab: AbkV, voltage Ubc: bCkV, voltage Uca:

CAkV, active power: PkW, reactive power: qkvar, power

factor: H


-21-

5.2 Instructions for use of key pad and LCD display

During the device’s normal operation, it will display the measuring current, power,

time in cycle. Press the “Enter” key to enter the main menu, which is a multi-level tree

menu. Press the ““, ““ keys to move the cursor to the desired entry, press the “Enter”

key to enter this entry, and press the “Cancel” key to return to the next higher level of

screen. If this screen is still a menu, continue to press the ““, ““ key to select the

desired entry, press the “Enter” key to enter the next level of screen, and press the

“Cancel” key to return to the next higher level of menu. If there is no menu screen, be

sure to press the “Cancel” key to return to the next higher level of menu. The main menu

is shown at the center of the following figure, with the corresponding submenus on both

sides.

The main interface displays the primary operating parameters in turn. The

maximum displayed value of the primary is 6000.0A. For systems with a rated current of

5A, the set CT transformation ratio shall not exceed 2000. If the primary power is greater

than 1000kW, the display unit is MW, otherwise is kW.


-22-

Main menu

1·State Display

2·Signal Revert

3·Report Display

4·Output Test

5·SYS Parameters

6·Setting Value

7·Clock Setting

8·Password

9·Version Info

Note 1：For setting value menu, see the description of each device.

State Display

The [State Display] menu contains 8 submenus, including protection data,

measuring data, binary input, pulse energy, angle display, harmonic data, DC

measurement and trip statistics. It is described as follows：

5．Parameters

Setting Zero No.

Comm. Setting

B. Parameters

D/A Setting

Pulse Energy

Trip Times Clear

Channel Coef.

1．State Dis.

Protection Data

Measuring Data

Binary Input

Pulse Energy

Phase Angle

Harmonic Data

DC Input Data

Trip Times

7．Clock setting

Date：□□-□□-□□

Time：□□:□□:□□

6．Settings（note 1）

Protection On/Off

。。。。。。

Note: See protection

setting table for detailed

8． Password

□□□□

Model：M□PR-600Hb

Version：V□.□□.□□

Date：20□□－□□－□□

CRC：□□□□□□□□H

3．Report Dis.

Trip Report

Binary Report

Event Report

Report Clear

2．Signal Revert

Enter

4．Output Test

Device Failure

Trip Signal

Alarm Signal

Output 4

Output 5

PROT Output 1

PROT Output 2

Output 8

Output 9

Output 10

Remote Close

Remote Trip

Operate All


-23-

Note: In the standard configurations, the input circuit has the connection to an

external 220VDC control power supply. When no DC control power supply or control

system is available on site, but a 110VDC control power supply is available, a 110VDC

control power supply may be used for direct connection through local hardware

adjustment, or the 24V power supply of the device may be used as the input power

1.1 Protection Data ↑ ↓

Ia = □□□·□□ A

Ib = □□□·□□ A

Ic = □□□·□□ A

Uab = □□□·□□ V

Ubc = □□□·□□ V

Uca = □□□·□□ V

U2 = □□□·□□ V

I0 = □□□·□□ A

。。。。。。

Protection CT secondary current value

PT secondary line voltage value

Zero sequence current

Measuring data ↑ ↓

IA = □□□·□□ A

IB = □□□·□□ A

IC = □□□·□□ A

Ua = □□□·□□ V

Ub = □□□·□□ V

Uc = □□□·□□ V

P = □□□□·□ W

Q = □□□□·□ var

Cosφ = □·□□□

。。。。。。

Measuring CT secondary current value

PT secondary phase voltage value

Cosine function for included angle of voltage and

current; for -90°<φ<90° , COSφ is positive; for

90°<φ<270° , COSφ is negative

Converted to PT, CT secondary active

power Converted to PT, CT secondary ractive

power

When closed, energy storage not completed

Binary Input ↑ ↓

Breaker： □

Trolley Run: □

Trolley test: □

Earth Switch : □

Spring: □

Heavy Gas： □

Light Gas ： □

Over T Trip： □

Temp. Alarm：□

Input 10 ： □

。。。。。。

Description varies with model, see corresponding terminal diagram

for details

At Closed, circuit breaker is at closed position; at Open, circuit breaker is at

open position. Note: The position of the circuit breaker relates to

protection logic, with fixed position.

When closed, trolley at operating position

When closed, closed position

When closed, trolley at test position

Negative sequence voltage


-24-

supply (when the input common terminal is +24V, terminal number: B14, Terminal B01 is

kept float). However, this must be specified upon ordering..

1.6 Harmonic ↑ ↓

I2： □□□·□□%

I3： □□□·□□%

I4： □□□·□□%

I5： □□□·□□%

。。。。。。

I11： □□□·□□%

2~11st harmonics for which analog channels have been selected in system

1.8 Trip Times

Total□□□□times

1.5 Phase Angle ↑ ↓

Ua： 0 0 0 ·0 0°

Ub：□□□·□□°

Uc：□□□·□□°

Ia：□□□·□□°

Ib：□□□·□□°

Ic：□□□·□□°

IA：□□□·□□°

IB：□□□·□□°

IC：□□□·□□°

。。。。。。

Phase angle relative to Ua, Ua as 0° by default. When

wiring method is VV, it displays line voltages relative to Uab,

the same as follows

Phase angle of protection current relative to Ua

Phase angle of measuring current relative to Ua

1.4 Pulse Energy ↑ ↓

MC1：□□□□□□□□□□

MC2：□□□□□□□□□□

MC3：□□□□□□□□□□

MC4：□□□□□□□□□□

＋□□□□□□□·□□□kWh

＋□□□□□□□·□□□kvh

－□□□□□□□·□□□kWh

－□□□□□□□·□□□kvh

Accumulation of the device’s real-time active and reactive calculations

over time, + for positive direction, - for negative direction.

External pulse energy input counting (4-way)

1.7 DC Input ↑ ↓

DC1：□□□·□□mA

DC2：□□□·□□mA External DC input 4~20mA (2-way)


-25-

Signal revert

In the [Signal Revert] menu, press the “Enter” key, the signal relay and the

“Operation” indicator on the panel will be reset.

Report Display

The [Report Display] menu includes 4 submenus, including trip report, remote

signal report, event report and clear report. Event recording includes: device self-check

fault, device setting value modification, system parameter modification and setting zone

number modification, etc. Trip report can be record for the last 50 events, remote signal

report for 100, event report for 30 at most. Beyond this, the latest report will overwrite the

earliest one. Press the “Enter” key to enter the corresponding [To view xx report, please

enter report number: 00 ] menu, and enter any figure within storage volume, press the

“Enter” key to display the contents of that report. The screen is as follows:

Press key to see the specific operation value. Press and keys to flip over.

Operation values

Output test

After entering the [Output Test] menu, the correct password is required to enter the

[Output Test] menu. It displays the following:

Report No：□□ ↓

□□□□-□□-□□

□□：□□：□□：□□□□

□□□□□□

Report No. of this report

Year, month, day

Hour, minute, second and millisecond

Report content description

Ia = □□□·□□ A

Ib = □□□·□□ A

Ic = □□□·□□ A

Uab = □□□·□□ V

Ubc = □□□·□□ V

Uca = □□□·□□ V

U1 = □□□·□□ V

I1 = □□□·□□ A

I2 = □□□·□□ A

。。。。。。

Protection CT secondary value

Zero sequence voltage, current and negative

sequence current operate value corresponds

to different protection component.

Protection PT secondary value


-26-

Press “Enter”

——————＞

＜——————

Press “Cancel” key

System parameters

After entering the [System Parameters] menu, the correct password is required to

enter the [System Parameters] menu. It displays the following:

Setting zone number setting: range 00~07.

Communication setting

4．Output test ↑ ↓

Device Failure

Trip Signal

Alarm Signal

Output 4

Output 5

PROT Output 1

PROT Output 2

。。。。。。

Operate All

Device Failure

Close Open

Comm. setting ↑ ↓

RS485 Address

□□

RS485 Baud rate

□□

Pulse Input Time

□□□□ms

IP Address

□□□. □□□. □□□. □□□

Subnet Mask

□□□. □□□. □□□. □□□

K W Default

□□□. □□□. □□□. □□□

Communication address of device 01～99

00：2.4KB；01：4.8KB；02：9.6KB；03：

19.2KB；04：38.4KB；05：115.2KB

Confirmation time of 4-way pulse

energy, >10ms, < pulse width of

kilowatt-hour meter

For Ethernet communication

5．Parameters ↑↓

Setting Zone No.

Comm. Setting

Basic Parameters

D/A setting

Pulse Energy

Trip Time Clear

Channel Coef.


-27-

Setting of basic parameters (see the description of the protection device

for basic parameters)

D/A setting

The device has two 4~20mA outputs. The DA1~DA2 adjustment factor is used to

adjust the accuracy of the channel output. The DA1~DA2 channel selection is used to

select the corresponding analog quantity channel (see the description of the protection

device for specific reference quantities). In the accuracy test, make sure the field ground

is in good contact; otherwise the accuracy might be affected.

Pulse energy setting

Energy base numbers can be set, including Pulse 1, Pulse 2, Pulse 3, Pulse 4,

positive active energy, positive reactive energy, negative active energy and negative

reactive energy.

Clear trip count

Used for clearing the trip count.

Settings

After entering the password, you can enter the [Settings] menu. See the settings

description of the protection device for the detailed description.

Clock setting

A battery-back real-time clock is provided in the device, which can perform time

adjust remotely via the communication network or in-site time adjust in the [Time Setting]

menu.

Setting the CT secondary current rating 00：1A；01：5A

Setting the PT transformation ratio: 1～1500

Setting the CT transformation ratio: 1～5000

Setting the CT secondary wiring mode

00：3-phase；01：2-phase

Setting the CT secondary wiring mode

00：：YY；01：V V

Setting analog quantity channels 0~12 for harmonic

monitoring, select0 to exit from the harmonic calculation

function.

B. Parameters

Rating Current

□□

PT Ratio

□□□

CT Ratio

□□□

CT Wiring Mode

□□

PT Wiring Mode

□□

Harmonic Channel

□□

。。。。。。


-28-

Enter this menu and press the “Enter” key, the

clock will stop refreshing and a cursor will appear.

Move the cursor to the desired position for

modification by pressing the ““, ““ keys, modify

to the desired value with the “+”, “-” keys. Press

the “Enter” key to complete setting. If the

“Cancel” key is pressed, the setting will be

cancelled and the screen continues to refresh the

clock.

Password

The [Password] menu is used to modify the password for entry into the Settings,

System parameters and Output Test submenus. The initial password is provided by the

factory. The universal password is “1000”.

Move the cursor to the desired position for

modification by pressing the ““, ““ keys,

modify to the desired password with the “+”, “-”

keys. Press the “Enter” key to enter the new

password setting menu as above; press the

“Cancel” key to cancel the setting.

GPS clock synchronization

The GPS clock synchronization signal is input as rs485 differential voltage, the

device is able to receive GPS clock minute synchronization(or second synchronization).

If there is GPS signal, there will be and flashing on the bottom of cycle menu;

otherwise won’t.

The principle of GPS clock synchronization: The second pulse or minute pulse act

with the monitoring system, the time base with second precision is sent by monitoring

system, when the GPS second differential signal arrives, the time base is unified and the

milliseconds are cleared.

Version Info

Enter the [9. Version Info] menu under the main menu, the model, software version

and date of the device will be displayed.

Note: For a corresponding nonstandard model, the device’s displayed model does not

have to be changed.

7. Clock setting

Date：20□□－□□－□□

Time： □□：□□：□□

Pls enter password

0 0 0 0


-29-

MCPR-610Hb

D1(3,5)

D2(4,6) A01

D15

D17

D19 A02

D16(18,20)

14(16,18)

Ia’(Ib’,Ic’)

Ia(Ib,Ic)

Ua

Ub Power supply

Uc

Ua’(Ub’,Uc’)

6.Check of protection function

6.1 2-step definite time limit overcurrent protection (Two-step OC)

Connect as figure 5-1, put over-current protection in running.

Figure 6-1

Set in accordance with the table as follow, take the operating value and keep it in the

table. When over-current protection is operated, terminals B17-18,B25-B26 and B27-B28

should be connected.

Current setting of

over-current (A) 1In 2In 5In 10In

Operating value

6.2 Zero Sequence Overcurrent Protection (ZS Overcurrent)

Connect as figure 5-2, put zero sequence over-current protection in running.

Figure 6-2

Set in accordance with the table as follow, take the operating value and keep it in the

table. When zero sequence over-current protection is operated, terminals B17-18, B25-26

and B27-B28 should be connected.

I0

I0’

Power supply

MCPR-610Hb

D7 A01

D8

A02


-30-

ZS OC Value (A) 0.20 0.50 1.00 1.50

Operating value

6.3 Imbalance Current Protection (Imbalance C)

Figure 6-3

Connect as figure 5-3, put unbalance current protection in running. Set in accordance

with the table as follow, take the operating value and keep it in the table. When unbalance

current protection is operated, terminals B17-18, B25-26 and B27-B28 should be

connected.

Imbalance Current (A) 1In 2 In 5 In 10 In

Operating value

6.4 Imbalance Voltage Protection (Imbalance V)

Connect as figure 5-4, put unbalance voltage protection in running. Set in accordance

with the table as follow, take the operating value and keep it in the table. When unbalance

voltage protection is operated, terminals B17-18, B25-26 and B27-B28 should be

connected.

Figure 6-4

Imbalance Voltage (V) 20 40 80 100

Operating value

MCPR-610Hb

D23 A01

D24 A02

Power supply

Ip

Ip’

MCPR-610Hb

D21 A01

D22 A02

Power supply

Up

Up’


-31-

6.5 Overvoltage Protection(Overvoltage)

Connect as figure 5-1, input A,B,C three phase voltages, put over-voltage protection in

running, connect terminals B01,B02 to simulate breaker closed. Set in accordance with the

table as follow, take the operating voltage and keep it in the table. When over-voltage

protection is operated, terminals B17-18, B25-26 and B27-B28 should be connected.

Overvoltage Value (V) 90 100 110 120

Operating value

6.6 No- voltage Protection(No-voltage)

Connect as figure 5-1, input A, B, C three phase voltages, put no voltage protection in

running, connect terminals B01, B02 to simulate breaker closed. Set in accordance with the

table as follow, take the operating voltage and keep it in the table. When no voltage

protection is operated, terminals B17-18, B25-26 and B27-B28 should be connected.

No-voltage Value (V) 20 40 60 80

Operating value

6.7 Body Protection(Body Protect)

Put heavy gas trip, light gas alarm, over-temperature trip, temperature alarm in running.

Set each protection delay values 0s.

Connect input signal to terminal B07, heavy gas trip will operate and operation signal

light will light, terminals B17-18, B25-26 and B27-B28 should be connected.

Connect input signal to terminal B08, light gas alarm will operate and alarm signal light

will light, terminals B19-20 should be connected.

Connect input signal to terminal B09, over-temperature trip will operate and operation

signal light will light, terminals B17-18, B25-26 and B27-B28 should be connected.

Connect input signal to terminal B10, temperature alarm will operate and alarm signal

light will light, terminals B19-20 should be connected.

6.8 PT Failure

Input 3-phase symmetric voltage（57.7V），disconnect any one or two phases, PT failure

will be alarmed; Take off voltage and input protection current greater than no current value;

the device should report PT failure (for the YY connection mode). Terminals B19-B20

should be connected.


-32-

Ip'Ip

1.Ia,Ib,Ic are protection currents.2.IA,IB,IC are measuring currents.3.Ua,Ub,Uc are protection voltages.4.Up is unbalanced voltage input,Ip is unbalanced current input.5.I0 is zero-sequence current.6.DCSIn is 2-way 4～20mA DC input.7.Net1,Net2 are ethernet interfaces,COM1,COM2 are 485 interfaces.8. If +24V on IO board is standard configuration or not,it is used as an input power supply only when using internal 24V.

Pulse 4（MC4）

Pulse 3（MC3）

Pulse 2（MC2）

(+24V)

Uc Uc'

Up Up'

Ub'Ub

Ua'Ua

IC'IC

D02

D04

D06

D08

D10

D12

D14

D16

D18

D20

D22

D24

I/OPOWER

B01B02

ON B06B05

B04B03

IaD01

IbD03

IcD05

IB

D07

OFFB10

B08

B09

B12

B14

B13

B11

B07

A02

A01

I0

D09

D11

IA

D13

D15

B17B18

B16

B19

B21B20

D17

D19

D21

D23

B23B24B25B26

B27B28B29

B22

A04

A06A05

B15A03

B30B31

B32

B34B35B36

B33

CPU

Ia'

Ib'

Ic'

IA'

AC

I0'

IB'

COM2A

COM2A

COM2B

COM2B

Debug

COM2

COM1

Net2

Net1

Run

C13

C17

DCS2+C19C20 DCS2-

C18 DCS1-

C16DCS1+

C14C15

C12

C10C11

COM1B

C08

C09

COM1B

COM1A

C06

C07

COM1A

C02

C04C05

C03

GPSB

GPSAC01

A21

A23A24

A22

A19

A20

A18

+WC

-WC

A10

A17

A16A15A14A13A12

A11

A08A09

A07

DCSIn2+

DCSIn2-

DCSIn1-

DCSIn1+D25

D27D28

D26

Pulse 1（MC1）

7.1 Diagram of terminals

Figure7-1 Terminal diagram of MCPR-610Hb microcomputer capacitor protection and

monitoring device

Ip'Ip

1.Ia,Ib,Ic are protection currents.2.IA,IB,IC are measuring currents.3.Ua,Ub,Uc are protection voltages.4.Up is unbalanced voltage input,Ip is unbalanced current input.5.I0 is zero-sequence current.6.DCSIn is 2-way 4～20mA DC input.7.Net1,Net2 are ethernet interfaces,COM1,COM2 are 485 interfaces.8. If +24V on IO board is standard configuration or not,it is used as an input power supply only when using internal 24V.

Pulse 4（MC4）

Pulse 3（MC3）

Pulse 2（MC2）

(+24V)

Uc Uc'

Up Up'

Ub'Ub

Ua'Ua

IC'IC

D02

D04

D06

D08

D10

D12

D14

D16

D18

D20

D22

D24

I/OPOWER

B01B02

ON B06B05

B04B03

IaD01

IbD03

IcD05

IB

D07

OFFB10

B08B09

B12

B14

B13

B11

B07

A02

A01

I0

D09

D11

IA

D13

D15

B17B18

B16

B19

B21B20

D17

D19

D21

D23

B23B24B25B26

B27B28B29

B22

A04

A06A05

B15A03

B30

B31

B32

B34B35B36

B33

CPU

Ia'

Ib'

Ic'

IA'

AC

I0'

IB'

COM2A

COM2A

COM2B

COM2B

Deb

ug

COM2

COM1

Net2

Net1

Run

C13

C17

DCS2+C19C20 DCS2-

C18 DCS1-

C16DCS1+

C14C15

C12

C10C11

COM1B

C08

C09

COM1B

COM1A

C06

C07

COM1A

C02

C04C05

C03

GPSB

GPSAC01

A21

A23A24

A22

A19

A20

A18

+WC

-WC

A10

A17

A16A15A14A13A12

A11

A08A09

A07

DCSIn2+

DCSIn2-

DCSIn1-

DCSIn1+D25

D27D28

D26

Pulse 1（MC1）


-33-

7.2 Typical wiring diagram of the device

Figure 7-2 Typical wiring diagram of MCPR-610Hb capacitor protection and monitoring

device

Unbalanced current

Measuring currentZero-sequence current

Protection currentUnbalanced voltageBus voltage

Note： 1.As shown as the figure,PT secondary is wye-connected, when V －V wiring is present, terminals D15,D20 is connected to phase

A of PT secondary, terminals D16,D17 are connected to phase B of PT secondary, terminals D18,D19 are connected to phase C of

PT secondary.

Shielded ground

Heavy Gas

C C

Pulse common point＋24V

Negative reactive pulse

Negative active pulse

Positive reactive pulse

Positive active pulse

DCSOut2-

DCSOut2+

DCSOut1-

Impulse 4（ 4）

Impulse 3（）

Circuit breaker

ccbbaa BBAA

DCSOut1+

COM B

COM B

COM A

COM A

Shielded ground

COM B

COM B

COM A

COM A

Impulse common terminal＋24V

Impulse 2（ 2）

Impulse 1（）

A

A

Input common

point-

Breaker

Trolley Run

Trolley Test

GEarth Switch

Spring

Light Gas

Over T Trip

Temp. Alarm

Input 10

Input 11

Input 12

Device

Failure

+WC

Manual trip input

Remote control trip

Device panel＋WC

Manual closing input

Remote control closure

Remote control common point

-WC

Closing coil

Trip position monitoring

Trip coil

Closing position monitoring

Closing position

Trip position

Power supply-

Shielded ground

Power off

Power supply+

Operating circuit

disconnected

a a b b c c

I/O plug-in unit

AC plug-in unit

Optical fiber communication port

Debugging port

MCPR-610Hb microcomputer capacitor protection and monitoring device

WC

WC

hase B hase C

Power plug-in unit

plug-in unit

CP

U

WC

WC

Device

Failure

PROT Output 2

Alarm Signal

Alarm Signal

Output 4

Output 4

Output 5

Output 5

TPROT Output 1

TPROT Output 1

PROT Output 2

Output 8

Output 9

normally open

Output 9

common point

Output 9

normally closed

Output 10

normally open

Output 10

common point

Output 10

normally closed

Output 8

Trip Signal

Trip Signal

DCSIn1-

DCSIn2-

DCSIn2+

DCSIn1+

AC plug-

in u

nit


-34-

Part 8 Operating circuit of MXPR-600Hb series device

8.1 Use of external changeover and operating switches

Traditional operating circuits are started by current, while a voltage maintaining

circuit realizes electric trip prevention. An anti-trip relay will be selected depending on

the current of the trip/closing circuit of the circuit breaker. However, this has poor

generality and can hardly be realized for circuit breakers with low trip and closing

currents (such as 10kV circuit breakers from AEG Company in Germany, whose trip and

closing currents are not greater than 0.2A). To simplify wiring and design finalization,

and to improve the generality of the product, we offer a new operating circuit shown

below.

Schematic diagram of operating circuit 1

TBJ2

TBJTCJ1

SHJ

YTJ

HBJA20

HBJ

Trip output

Remote trip

Electrical

Protection

TCJ2

STJ

STJ

1LP

JnTn3

Tn4

HWJA10

TWJA09

Manual trip

Trip position

DLA13

HWJ

TWJ

A08TWJ

A12HWJ

A14

A20

A07

A11

TCJ

SHJ

Trip position

TBJ1

Tn2

A24

Tn1

Jn

A22

YHJ

A18

A19

A17

A23

A15

Clos

ing

circ

uit

Trip

circuit

Protection

Trip

Fuse

Small bus

TQDL

HQDL

KK84 5

ZK2

2LP

7KK

686ZK

3ZK

1

A16

output

output

trip

closing

anti-trip


-35-

In the diagram, KK is a traditional operating switch, used for manual trip/closing

operations, ZK is a changeover switch, used for changeover of local and remote control.

When ZK is at the “Remote” position, the power of the remote control circuit will be

switched on, i.e., Terminal A22 of the device is connected to +KM, and the power of the

manual operating circuit is cut off, disabling manual closing and manual trip. On the

contrary, when ZK is at the “Local” position, the power of the manual operating circuit is

switched on and that of the remote control circuit is cut off.

Note: The dotted line outlines the internal circuit of the protection device. All our

devices marked with “anti-trip circuit” are designed on this operating circuit.

Terminals Tn1, Tn2 corresponding to the protection relay Jn are determined by the

corresponding protection output control word. Jn can be any one or more of Protection

outputs 1-8.

Whether local or remote control, the precondition to jump is Terminal A15 of the device

is always connected to +KM. After manual or remote controlled closing, if a short-circuit fault

occurs, the protection will operate to trip the circuit breaker. Though Terminal A15 of the

device is connected to +KM, the closing circuit is disconnected by TBJ1 and will not be

closed again. In this way, circuit breaker jump is effectively prevented.


-36-

8..2 Use of trip and closing buttons on the panel

Schematic diagram of operating circuit 2

In the diagram, KK1, KK2 and ZK are on the panel, in which KK1 and KK2 are

manual closing and manual trip buttons (the manual closing and manual trip contacts are

already connected to manual close in and manual trip in internally) , ZK is a changeover

switch for switching between the local/remote positions, completely replacing the

changeover and operating switches on the board/cabinet panel.

Note: The dotted line outlines the internal circuit of the protection device. When a

control button on the panel is used, Terminal +KM A21 on the panel must be connected

to +KM.

A21

A16

1ZK

3

ZK6 8 6

KK27

2LP

2ZK

54 8KK1

DL HQ

DLTQ

Small bus

Fuse

Trip

Trip circuit

Closing circuit

A15

A23

A17

A19

A18

YHJA22

JnTn1

A24

Tn2

TBJ1

Trip position

SHJ

TCJ

A11

A07

A20

A14

HWJA12

TWJA08

TWJ

HWJA13

DL

Manual trip

A09TWJ

A10

Control circuitHWJ

Tn4

Tn3

Jn

1LP

STJ

STJ

TCJ2

Protection

Electrical

Remote trip

Trip output

HBJA20

HBJ

YTJ

SHJ

TCJ1 TBJ

TBJ2

disconnected

output

closing

anti-trip

Documents

Capacitor Protection Relays and Monitoring Device