ECP 11-0512f Lucy VRN6a with MiCOM P124S Relay Test Formlibrary.ukpowernetworks.co.uk/library/asset/fe5f91a4-07b... · Web viewECP 11-0512f Lucy VRN6a with MiCOM P124S Relay Test

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Document Number: ECP 11-0512f

Version: 4.0

Date: 04/12/2015

LUCY VRN6A WITH MICOM P124S RELAY TEST FORM

Substation Name

Substation Number

Voltage

Switchgear

Installed Mode Free-standing () Transformer-mounted ()

Switchboard Number Manufacturer Lucy

Serial Number Type VRN6a

Protection CTs

CT Ratio (400/1 or 800/1)

Relay

Serial Number

Shunt Trip Coil (if fitted)

24-110V DC/110-240V AC ()

Protection Settings (specified by planner/designer)

Overcurrent Settings Earth Fault Settings

Setting Current Setting Current

Curve Curve

Time Multiplier Time Multiplier

Highset Setting Current Highset (or SEF) Setting Current

Highset Time Highset (or SEF) Time

Preliminary Checks ()

Disconnect the umbilical cable from the RTU (if fitted)

Visual inspection satisfactory (no visible signs of damage etc)

Earthing satisfactory

SF6 gas pressure satisfactory

Functional/Interlock Checks ()

Open and close switches

Earth switches cannot be operated when service selected

Switch/circuit-breaker cannot be operated when earth selected

Open and close earth switches

Test access/earth star bar cannot be opened when switch/circuit-breaker in On/Off

Test access/earth star bar can be opened when earth switch closed

Switch/circuit-breaker cannot be operated when test access open

Lucy VRN6a with MiCOM P124S Relay Test Form Document Number: ECP 11-0512f

Version: 4.0

Date: 04/12/2015

Functional/Interlock Checks ()

Actuator operation satisfactory using an RTU simulator (LPN Remsdaq RTU only)

Transformer Winding Insulation Resistance using Test Voltage from ECS 11-0006(transformer-mounted units only)

HV windings to earth (LV windings connected together and to earth) M

LV windings to earth (HV windings connected together and to earth) M

Switchgear Continuity Test

Switch/Circuit- breaker Position Terminals Under Test Continuity

RSW1 RSW2 CB TM* FS*

TM* FS* RSW1 to RSW2 RSW1 to RSW2 to CB

Closed Closed Open Closed L1 - L1 L1 - L1 - L1



Closed Open Closed L1 - L2 (RSW1)

Closed Open Closed L2 - L3 (RSW1)

RSW1 RSW2 CB Terminals Under Test Continuity

Earthed

Open Open RSW1 L1 - E

L2 - E

L3 - E

Open Earthed Open RSW2 L1 - E

L2 - E

L3 - E

HV Insulation Tests using Test Voltage from ECS 11-0006

RSW1 RSW2 CB Terminal Voltage (kV)

Duration (min)

IR (M)

Under Test

Earthed

TM* FS* RSW1 RSW2 CB(FS* only)

Closed Closed Open Closed L1 L2, L3



Open Closed Open Closed L1, L2, L3

L1, L2, L3

L1, L2, L3

Closed Open Open Open L1, L2, L3

L1, L2, L3

* TM - transformer-mounted and FS - free-standing.

© UK Power Networks 2016 All rights reserved 2 of 10


Version: 4.0

Date: 04/12/2015

RSW1 FPI CT Tests (test from marshalling box – refer to Figure 5 and Figure 2)

Disconnect CT wires C410/1, C430/1 and C450/1 from the left-side of the shorting block ()

Check earth continuity C510/1 - C530/1 - C550/1 - earth ()

Disconnect wire C90 ()

Measure earth insulation resistance C510/1 - C530/1 - C550/1 - earth M

Measure L1 CT loop continuity C410/1 - C510/1



Reconnect wire C90 ()


Reconnect CT wires C410/1, C430/1 and C450/1to left-side of shorting block ()

RSW2 FPI CT Tests (test from marshalling box – refer to Figure 5 and Figure 2)

Disconnect CT wires C410/2, C430/2 and C450/2 from the left-side of the shorting block ()


Disconnect wire C90 ()

Measure earth insulation resistance C510/2 - C530/2 - C550/2 - earth M




Reconnect wire C90 ()


Reconnect CT wires C410/2, C430/2 and C450/2to left-side of shorting block ()



Version: 4.0

Date: 04/12/2015

Figure 1 – FPI CT Connections in Marshalling Box

Figure 2 – FPI CT Schematic Drawing

Refer to Appendix C for FPI schematic diagrams.


FPI CT connections (disconnect for FPI CT tests)

C90 (disconnect for FPI CT tests)

FPI CT shorting block (CTs shorted when output wires disconnected)

FPI Connections

FPI CT common connections


Version: 4.0

Date: 04/12/2015

Protection CTs Insulation Resistance using 1kV Test Voltage(test from marshalling box – refer to Figure 4 and Figure 5 overleaf)

Check circuit-breaker selector switch is in the service position ()

Remove relay from the case (move nylon catch under flap to release relay) ()

Remove CT wiring earth link C70 - C90 ()

Measure the insulation resistance C70 - C90 (Earth) M

Replace CT wiring earth link C70 - C90 ()

Protection CTs Loop Continuity(from CT wiring terminal block)

Disable the automatic protection CT shorting by separating the contacts in the relay housing as shown in Figure 3

()

Measure L1 CT continuity C11 - C70



Re-enable protection CT shorting ()

Figure 3 – Disable Protection CT Shorting

Relay Case Resistance

Measure the resistance between the relay case and the switchgear earth

Insert relay back into case ()



Version: 4.0

Date: 04/12/2015

Figure 4 – Marshalling Box

Figure 5 – Protection Connections in Marshalling Box

Refer to Appendix C for protection schematic diagrams.


See below

Protection CT Test Connections

Earth link C70-C90


Version: 4.0

Date: 04/12/2015

Protection CT Ratio

Remove CT ratio plate from front panel ()

Select the appropriate CT ratio

CT Ratio Shorting Link Across Terminals Setting

200/1 4, 5, 6, 7 20-400A ()

600/1 1, 2, 3, 4 60-1200A ()

Test Protection Settings

Plug in relay battery box to power up relay ()

Apply the following temporary settings to the relay (refer to Appendix A for guidance) ()


I> 80A200/1 0.4 In

Ie> 60A200/1 0.3 Ien

600/1 0.13 In 600/1 0.1 Ien

Delay Type IDMT Delay Type IDMT

Idmt IEC SI Idmt IEC SI

Tms 1.5 Tms 1.5

I>> No Ie>> No

I>>> No Ie>>> No

Relay Operation - Primary Injection Test

Ensure battery box is plugged into relay (this is required because some of the above settings maybe below the minimum operating current of the relay)

Increase current until ALARM is displayed on the LCD. Reset the relay and, if necessary, close the circuit breaker before each test

Overcurrent Pickup Test

RSW1 RSW2 CB Conductors Under Test

Short Conductors

I> Setting

Calculated Pickup Current (1.1 x I>)

Actual Pickup Current

RSW1 CB

Closed Open Closed L1 - L2 L1, L2, L3 80A 88A A

Closed Open Closed L2 - L3 L1, L2, L3 80A 88A A

Earth Fault Pickup Test

RSW1 RSW2 CB Conductors Under Test Ie> Setting

Calculated Pickup Current (1.1 x Ie>)

Actual Pickup Current

RSW1 CB

Closed Open Closed L1 L1 60A 66A A





Version: 4.0

Date: 04/12/2015

In-service Protection Settings

Apply the in-service protection settings as specified by the planner/designer to the relay and record them below (refer to Appendix A for guidance) ()


CT Ratio

Primary Setting Current Primary Setting Current

I> (Yes/No) Ie> (Yes/No)

I> (Primary Setting Current ÷ CT Ratio) Ie> (Primary Setting Current ÷ CT Ratio)

IDMT Curve Type IDMT Curve Type

Tms Tms

Highset Primary Setting Highset Primary Setting

I>> (Yes/No) Ie>> (Yes/No)

I>> (Highset Primary Setting ÷ CT Ratio) Ie>> (Highset Primary Setting ÷ CT Ratio)

tI>> tIe>>

In-service Trip Settings

Apply trip settings to the relay – every element used above requires the corresponding trip command to be set to Yes (refer to Appendix A for guidance) ()

Trip tI> Trip tIe>

Trip tI>> Trip tIe>>

Table A - Calculate Injection Currents Overcurrent Setting Earth Fault Setting

Setting Current (I> or Ie>) (I>) (Ie>)

2 x Secondary Setting Current

5 x Secondary Setting Current

Highset (I>> or Ie>>) (I>>) (Ie>>)



Version: 4.0

Date: 04/12/2015

Relay Operation - Secondary Injection Test

Connect timer circuit to terminals 33 (L3/3) and 35 (L5/3) in the marshalling cabinet (contact closed when CB open) ()

Overcurrent Test

SettingCalculated Injection Current(from table A)

Calculated Operating Time (from table B)

Actual Operating Times

C11 - C31 C31 - C51 C51 - C11

2x A s s s s

5x A s s s s

Highset A s s s s

Earth Fault Test

SettingCalculated Injection Current(from table A)

Calculated Operating Time (from table B)

Actual Operating Times

C11 - C72 C31 - C72 C51 - C72

2x A s s s s

5x A s s s s

Highset A s s s s

SEF* A s s s s

* The trip current may have to be increased to operate the circuit breaker if the current is below the minimum operating current.


Table B - Calculate Operating Times Overcurrent Setting Earth Fault Setting

Curve (I>) (Ie>)

Time Setting(Tms) (Tms)

(tI>>) (tIe>>)

Tripping time at 2x secondary current

Curve SI (Tms x 10s) + 0.09s s s

Curve VI (Tms x 13.5s) + 0.09s s s

Curve EI (Tms x 26.67s) + 0.09s s s

Tripping time at 5x secondary current

Curve SI (Tms x 4.28s) + 0.09s s s

Curve VI (Tms x 3.38s) + 0.09s s s

Curve EI (Tms x 3.33s) + 0.09s s s

Tripping time at I>>, Ie>>

Overcurrent Highset tI>> + 0.09s s s

Earth Fault Highset (SEF) tIe>> + 0.09s s s


Version: 4.0

Date: 04/12/2015

Shunt Trip and Emergency Trip (if fitted)

Check correct shunt trip coil voltage is selected ()

Test Coil Marshalling Box Terminals

Test Voltage CB Trips

Apply 70% (dc) or 85% (ac) of coil rated voltage

24-110V DC/110-240V AC 41 - 42 V ()

Apply 110% of coil rated voltage 24-110V DC/110-240V AC 41 - 42 V ()

Check emergency trip button operates circuit-breaker ()

Final Checks ()

Check correct protection settings applied

Check relay reset

Remove battery box from relay

Ensure FPI CT shorting-link(s) are replaced if CTs are not used or not connected to FPI or RTU

Reconnect umbilical cable to RTU (if fitted)

Asset data form completed

Test Equipment

Make/Type Serial Number Calibration Date

Certification ()

All tests have been completed satisfactorily

Comments

Commissioning Engineer Signature Date

The completed test form shall be left on-site in a plastic wallet and in secure location. A copy of the completed test shall be sent to the relevant ART mailbox.



Version: 4.0

Date: 04/12/2015

Appendix A – MiCOM P124S

A.1 Introduction

The MiCOM P124S is a self powered three phase overcurrent and earth fault protection relay. Settings are applied and fault reports read using the LCD display and the control buttons on the front panel (see section A.3).

A battery box is available to power the relay during commissioning. The battery box is plugged into the serial port under the lower panel on the front of the relay (section A.4).

Note: The minimum operating current of the relay is 20% of the CT primary current. The operating time of the VRN6a circuit breaker is 80 to 100ms.

A.2 Programming

The keypad has seven keys divided into two groups:

The and keys situated immediately under the screen are dedicated to reading and acknowledging alarms.

The other five keys situated below these are used for programming the relay and navigating the menu system (a map of the menu system is shown in section A.5). The

directional keys either move through the various levels of the menu or are used to change settings. The key validates a choice or applied value. The general

menu navigation is left and right to scroll through the main menu headings. Pressing down will enter the menu selected and allow you to scroll through the various options.

For example, applying the following typical settings to a MiCOM P124S relay used with 200/1 CTs:

Protection Function Protection Setting Relay Equivalent Setting

OC 200A VI 0.1TM 1 In

OCHS 1200A 6 In

EF 100A SI 0.1TM 0.5 Ien

SEF 32A DT 3s 0.16 Ien

Note: Various settings, such as the selection of the various thresholds, time delays, trip settings etc are password protected and when accessing these menus a password entry is required. By default this is set to AAAA and will already be entered when the password prompt appears on the LCD. To proceed past this screen press the key.

First the CT ratio must be set in the relay:

From the default current display press down to display the main menu, OP PARAMETERS will be displayed on the LCD.

Press right to navigate to the CONFIGURATION menu. Press down to display the CT Ratio.

© UK Power Networks 2016 All rights reserved 1


Version: 4.0

Date: 04/12/2015

Press down to Line CT primary, then to edit the value, a blinking cursor should appear.

Press left or right to select the digit to change and up or down to alter the digit selected.

Confirm the new entry with the key - the new Line CT primary value should be displayed. For 200/1 CTs this should be set to 200.

Press down again to E/Gnd CT primary and set this to 200 also. The CT ratios have now been set, press up to return to the CONFIGURATION main

menu.

Next apply the relay settings as below:

Use right to navigate to the PROTECTION menu. Press down to display [50/51] Phase OC. Press down to the overcurrent selection I> ? screen. Press to edit and up or down to change to Yes, confirm by pressing

again. Press down to I> and edit to set the current as a proportion of the CT primary, for a

200/1 CTs with a 200A setting this should be set to 1 In. Press down to display the Delay Type - set to IDMT. Press down again to display Idmt - set to IEC VI. Press down again to display Tms - set to 0.1. Press down again to display I>> ? - set to Yes. Press down again to display I>> - set to 6. Press down again to display Delay Type - set to DMT. Press down again to display tI>> - set to 0s. Press down again to display I>>> ? - set to No (unless additional overcurrent

settings sre required). Press up to return to the [50/51] Phase OC menu. The earth fault settings can be set using the same method but applied to the [50N/51N]

E/Gnd menu under PROTECTION. As a setting of 100A is required, this should be applied by setting Ie> to 0.5 Ien. Press down to display the Delay Type - set to IDMT. Press down again to display Idmt - set to IEC SI. Press down again to display Tms - set to 0.1. Press down again to display Ie>> ? - set to Yes. Press down again to display Ie>> - set to 0.16. Press down again to display Delay Type - set to DMT. Press down again to display tIe>> - set to 3s. If further earth fault settings are required they should be implemented using the Ie>> and

Ie>>> menus. If not required, ensure these are not enabled by setting them to No. The protection settings have now been entered, press up to return to the

PROTECTION main menu.

Finally, the relay must be set to ensure that it will trip for the settings selected:

Navigate to the AUTOMAT. CTRL main menu and press down to Trip Commands. Press down to navigate through the various settings to trip on. With the example settings set Trip tI> to Yes, Trip tI>> to Yes, Trip tIe> to Yes and set

Trip tIe>> to Yes. All other trips should be set to No.

The required relay settings have now been applied.



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A.3 Front Panel

A.4 Battery Box (material code 13945R)



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A.5 Menu Structure



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Appendix B – MiCOM P124S – Disable Relay Tripping Function


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rela

y se

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'No'


Version: 4.0

Date: 04/12/2015

Appendix C – VRN6a Schematic Diagrams

THM 0004977 – MiCOM P124S

THM 0008215 – Nortroll CableTroll 2350 Switch 1

THM 0008244 – Nortroll CableTroll 2350 Switch 2

Note: A full set of Lucy SABRE A drawings are contained in ECP 11-0511z Lucy SABRE A Schematic Drawings.pdf.



Version: 4.0

Date: 04/12/2015



Version: 4.0

Date: 04/12/2015



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Date: 04/12/2015


Documents

ECP 11-0512f Lucy VRN6a with MiCOM P124S Relay Test Formlibrary.ukpowernetworks.co.uk/library/asset/fe5f91a4-07b... · Web viewECP 11-0512f Lucy VRN6a with MiCOM P124S Relay Test