SUMMARY REVISION PAGES 0 1 1 PURPOSE OF TESTS 2 X 2 REFERENCE DOCUMENT 2 X 3 SCOPE 2 X 4 RELAY TERMINLOGY 3 X 5 TEST EQUIPMENT 3 X 6 PRE-REQUISTES 3 X 7 PROCEDURES 4 X
8 RECORD TEST SHEET 10 X
8.1 RELAY INFORMATION 8.2 CT DATA:
8.3 PRODUCT CHECKS
8.4 MEASURMENT VALUE TEST: 8.5 DIFFERENTIAL PROTECTION 8.6 BINARY INPUT TEST :
8.7 BINARY OUTPUT TEST:
8.8 FIXED LED INDICATIONS TEST:
8.9 LED INDICATIONS TEST: ( LEFT SIDE LED)
8.10 GOOSE CHANNEL TEST
1 PURPOSE OF TESTS
The purpose of the tests is to check the full functionality of the protection relay.
This procedure does not intend to check that all alarms and trips are correctly sent to the DCS or SCADA level. This part is already developed into dedicated DCS or SCADA Commissioning procedures.
This procedure does not intend to check all tripping matrix and PSL logic tests, this, when applicable, is described into a separate document, dedicated to the specific substation and feeder type.
2 REFERENCE DOCUMENTS
DOCUMENT REFERENCEDOCUMENT VERSION/DATE REMARKS
Protection Line Diagram Schematic Drawing Service Manual Operation Manual
Protection Relay Coordination Principles Relay setting Calculation
PSL logic Connections LED Display Configuration
3 SCOPE
Substation Name :- Diameter:
Bay :
Panel Number :
Relay Denomination in Scheme
Scheme to be Checked Relay Functionality Test.
Code ( ANSI) Terminology
TEE2 TEE busbar Differential Protection
5 TEST EQUIPMENT USED
Sl No Description Make EquipmentSl No. Calibrationdate Calibration duedate
1. Secondary
Injection Kit
2. Multimeter
3. Laptop NA
Setting software Type : MICOM S1 Studio
Version : 2.14
6 PRE - REQUISITES
PRE-REQUISITES REMARKS
All Safety Condition Are Ok
All Competent Personnel Available For The Test Ac & Dc Supply Availability And Security PPE Safety Available.
All Other Relevant Safety Instructions Been Followed Coordination With Other Parties ( GIS, Transformer, Etc..)
7 TEST PROCEDURES
The following procedures are written for demonstrating the main protection functions of the P633 relay using an Omicron test set or similar. The tests do not test the boundaries of all available function characteristics. They do test that the function is operating at a point on one chosen characteristic. This document is to be referred to when performing commissioning tests in association with the commissioning section of the service manual.
NOTE :
All the Test are performed in the Test Switch.
Omicron CMC156 Test Equipment or Any Equivalent To Be Used..
7.1 Differential protection
Following parameters define differential characteristics :
Menu Data point Setting in our example
Para/Funct/PSS1/Diff Idiff> 0.2 Iref
M1 0.3
M2 0.7
IR, m2 4.0 Iref
7.1.1 Checking of first section : Objective : To test threshold Idiff > Test method :
Inject balanced currents in all phases. ( one by one) (say 0.150 A for our example) Gradually increase currents till relay operation. Note down the value.
Pass criteria :
The operating current should be within +/- 5% of { Idiff> / Kam,a}.
7.1.2 Checking of second section : Objective : To check slope m1.
Test method : Simulate differential and restraining currents such that they lie in the region over and
Restraining current Ir = 0.5 * { |Ia| + |Ib| } Differential current Id = | Ia + Ib |
Inject 1 A balanced currents in HV and LV windings.
Gradually increase HV current till relay operation. Note down value.
Pass criteria :
Characteristic equation for the range (0.5 Idiff >) < (Ir) <(Ir m2) Id = (m1*Ir ) + Idiff> * (1- 0.5*m1)
In our case , m1 = 0.3 Idiff> = 0.2
Please note that “Id” and “Ir” are derived by the relay after amplitude and vector group matching. Hence, we have to multiply injected currents by amplitude matching factors for calculation of “Id” and “Ir” , then we substitute this value of “Ir” into characteristic equation, To find Theoretical value of Id.then compare with measure value of Id .
7.1.3 Checking of third section :
Objective : To check slope m2 and threshold IR m2.
Test method : Simulate differential and restraining currents such that they lie in this region over and
under the curve
Restraining current Ir = 0.5 * { |Ia| + |Ib| } Differential current Id = | Ia + Ib |
Inject 5 A balanced currents in HV and LV windings. (
Gradually increase HV current till relay operation. Note down value.
Characteristic equation for the range Ir m2 < Ir Id = (m2*Ir ) + Idiff> * (1- 0.5*m1) + Ir m2 * (m1-m2) In our case , m1 = 0.3 M2 = 0.7 Idiff> = 0.2 Ir m2 = 4.0
Please note that “Id” and “Ir” are derived by the relay after amplitude and vector group matching. Hence, we have to multiply injected currents by amplitude matching factors for calculation of “Id” and “Ir”, then we substitute this value of “Ir” into characteristic equation, To find Theoretical value of Id.then compare with measure value of Id .
7.1.4 Checking of harmonic blocking :
Following settings affect the second harmonic blocking
Menu Data point Setting in our example
Para/Funct/PSS1/Diff Rush I(2f0)/I (f0) PS1 20%
Objective : To check the set threshold for second harmonic blocking Test method :
Test module – DIFFERENTIAL Use “harmonic” tab.
Select second harmonic injection Set Idiff = 1.0 I/In
Ixf = <20% , say 19%, observe that DIFFERENTIAL element of relay trips. Ixf = >20% , say 21%, observe that DIFF. Element doesn’t trip
Pass criteria : Measured second harmonic threshold for blocking of differential element should be
+/-10% of set value.
Following setting is used for rapid (high-set) differential protection function.
Menu Data point Setting in our example
Para/Funct/PSS1/Diff Idiff >> PS1 6.0 Iref
Test method :
Test module – DIFFERENTIAL Use “harmonic” tab.
Select second harmonic injection ( to insure only Idif>> is operational) Set Idiff = say, 5.0 I/In
Ixf = >20% , say 25%, observe that DIFFERENTIAL element of relay trips.
If injected “Idiff” exceeds 6.0 Iref, then the relay trips irrespective of second harmonic content.
Pass criteria :
Actual differential current can be seen from relay measurement menu
Menu Data point Reading
Oper/Cyclic meas/Meas op. Data/Diff
Diff current 1 This should be within +/-
10% of 6.0
7.2 Testing of Binary Inputs :
Apply nominal Voltage on respective Relay terminal and Check the Healthiness of Binary Inputs in the System Manu – Relay input status. ( 0 or 1 ) Note : if the BI is used in the scheme the BI will be tested along with scheme.
Caution : please make sure of Nominal voltage and Polarity of Terminal before apply the voltage to relay.
The status of each opto-isolated input can be viewed in the Measurements + Tests subheading in the menu, under Measurements/I.O Status Monitor, example cell for opto input U2001 [153.086:
Measurements + Tests/Measurements/I.O. Status Monitor/INP, State U 2001]. A de-energized input is indicated by the display ‘Low’, and when an input is energized the display should read ‘High’.
7.3 Testing of Binary Output’s :
This test checks that all the output relays are functioning correctly. It can also be used to verify that output contact wiring is routed to the correct location, via the panel/cubicle wiring.
Connect a continuity tester across the terminals corresponding to the output relay being tested, as given in the external connection diagram.
Output contacts will be operated by manual commands - ensure that contact operation is permitted, without dangerous/unwanted consequences. For example, operation of contacts assigned to trip or close duties should only be undertaken if the CB is locked for no operation, or if operation is permitted. The output relays should be energized one at a time. The means of operating contacts is within the Control and Testing sub-heading in the menu, via the heading Measurements + Tests. The user first selects which contact should be operated, at cell [003.042: Measurements + Tests/Control + Testing/OUTP, Relay Assign. f.Test]. The contact to be operated is selected by scrolling down the list and selecting Configure.
Once configured, stepping down to the next cell in the menu [003.043: …/OUTP, Relay Test] allows the user to apply the test by selecting ‘Execute’. With default settings, the selected contact will be operated for 1 second. Operation will be confirmed by the continuity tester operating for a normally open contact and ceasing to operate for a normally closed contact.
Note: It should be ensured that thermal ratings of anything connected to the output relays during the contact test procedure is not exceeded by the associated output relay being operated for too long. It is therefore advised that the time between application and removal of contact test is kept to the minimum.
Note : If the Outputs are assigned for function this will be tested along with Functional test of relays.
8 RECORD TEST SHEET 8.1 RELAY INFORMATION
Type No.: P633 Designation :
Model No : Nominal Current :
Serial Number Nominal Voltage` :
Firmware Version : Aux. Volts :
8.2 CT DATA:
CTs SIDE 1
CT rated primary current set as CT rated secondary current set as Ignd-CT rated primary current set as Ignd-CT rated secondary current set as CTs
SIDE 2
CT rated primary current set as CT rated secondary current set as Ignd-CT rated primary current set as Ignd-CT rated secondary current set as CTs
SIDE 3
CT rated primary current set as CT rated secondary current set as Ignd-CT rated primary current set as Ignd-CT rated secondary current set as
8.3 PRODUCT CHECKS
Relay damaged?
Rating information correct for installation? Case earth installed?
External wiring checked against diagram? Test block connections checked?
Measured auxiliary supply V dc
Value measured between terminals 8 and 9 V dc
LCD front panel display Clock set to local time?
8.4 MEASURMENT VALUE TEST: 8.4.1 CT 1 Current Measurement Phase injected Current injected (Amps)
Secondary Current read on relay
display (A) Primary Current read on relay display(A)
PH-N IR IY IB IN IR IY IB IN L1-E 1.0 0 0 0 0 L2-E 1.0 0 0 0 0 L3-E 1.0 0 0 0 0 L1-L2-L3 1.0 0 0 8.4.2 CT2 Current Measurement Phase injected Current injected (Amps)
Secondary Current read on relay
display (A) Primary Current read on relay display(A)
PH-N IR IY IB IN IR IY IB IN L1-E 1.0 0 0 0 0 L2-E 1.0 0 0 0 0 L3-E 1.0 0 0 0 0 L1-L2-L3 1.0 0 0 8.4.3 CT 3 Current Measurement Phase injected Current injected (Amps)
Secondary Current read on relay
display (A) Primary Current read on relay display(A)
PH-N IR IY IB IN IR IY IB IN
L1-E 1.0 0 0 0 0
L2-E 1.0 0 0 0 0
L3-E 1.0 0 0 0 0
8.5 DIFFERENTIAL PROTECTION Settings:
Winding “a” amplitude matching factor – Kam,a Winding “b” amplitude matching factor – Kam,b Winding “c” amplitude matching factor – Kam,b Vector group reference ( a-b)
Vector group reference (a-c ) Zero sequence filter on winding “a” Zero sequence filter on winding “b” Zero sequence filter on winding “c” Idiff>
M1 M2 IR, m2
8.5.1 Checking the first section of tripping characteristics & the Operating Time.
Expected operating current = (Idiff>*Inom)/(Kam,a*Ks,1,a) = Expected Operating Time < 40 ms
Test Winding Expected
operating current Measured current Injected current Operating time(ms) (R phase) Side a 1.0 A Side b 1.0 A Side c 1.0 A (Y phase) Side a 1.0 A Side b 1.0 A Side c 1.0 A (B phase) Side a 1.0 A
Side b 1.0 A
Side c 1.0 A
8.5.2 Checking of second/third section of tripping characteristic (Between sides a & b) :
Test method : 1 phase currents injected in winding “a” and “b”.
Vector group ends a-b: kam,a: kam,b:
PHASE Section of tripping char. Under test Winding “a” Injected Current Winding “b” Injected Current Restrain current Measured Differential current Calculated Measured (R phase) Second Third (Y phase) Second Third (B phase) Second Third
8.5.3 Checking of second/third section of tripping characteristic (Between sides a & c) :
Test method : 1 phase currents injected in winding “a” and “c”.
Vector group ends a-c: kam,a: kam,c:
PHASE Section of tripping char. Under test Winding “a” Injected Current Winding “c” Injected Current Restrain current Measured Differential current Calculated Measured (R phase) Second Third (Y phase) Second Third (B phase) Second Third
8.5.4 Checking of Magnetizing Inrush Restraint :
Harmonic Blocking Setting: %
Applied Phase Injected Current Pick up % 2nd Harmonic
(R phase) Side a Side b Side c (Y phase) Side a Side b Side c (B phase) Side a Side b Side c
8.6 BINARY INPUT TEST :
Input No. Terminal No. Active Function Assigned sheet Result
U901 19X118-19X119 High SPARE* 212
U902 19X120-19X121 High SPARE* 212
U903 19X122-19X124 High NOT USED**
U904 19X123-19X124 High NOT USED**
* SPARE: wired up to terminal blocks. ** NOT USED: Not wired.
8.7 BINARY OUTPUT TEST:
K901 19X101-19X102 NO DTT-B SEND 211 19X103-19X104 NO 3 PHASE TRIP TO 86CB 212 K902 19X105-19X107 NC NOT USED** 19X106-19X107 NO K903 19X108-19X109 NO NOT USED** K904 19X110-19X111 NO NOT USED** K905 19X110-19X112 NO NOT USED** K906 19X110-19X113 NO NOT USED** K907 19X110-19X114 NO NOT USED** K908 19X115-19X117 NC NOT USED** 19X116-19X117 NO NOT USED**
* SPARE: wired up to terminal blocks. ** NOT USED: Not wired.
8.8 FIXED LED INDICATIONS TEST:
LED No. LED Label Color Result
LED H1 LED H2 LED H3 LED H4
8.9 LED INDICATIONS TEST: ( LEFT SIDE LED)
LED No. LED Label Color Result
LED H5 LED H6 LED H7
LED H8 LED H9 LED H10 LED H11 LED H12 LED H13 LED H14 LED H15 LED H16
8.10 GOOSE CHANNEL TEST ( IF APPLICABLE)
Channel Receive Test Channel Send Test
Channel No Function Assigned Result Channel No Function Assigned Result
Item Description Result
1 All test equipment, leads, shorts and test block removed safely?
2 Disturbed customer wiring re-checked?
3 All commissioning tests disabled?
4 Circuit breaker operations counter reset?
5 Current counters reset?
6 Event records reset?
7 Fault records reset?
8 Disturbance records reset?
9 Alarms reset?
10 LEDs reset?
11 Secondary front cover replaced? (If applicable)
REMARKS
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