Extended Testing; Completing The Test; Two Step Residual Overvoltage Protection Rov2Ptov; Function Revision History - Hitachi Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
1. Apply single-phase voltage below the set value U1>.
2. Slowly increase the voltage until the ST1 signal appears.
3. Note the operate value and compare it with the set value U1>.
For phase-to-earth measurement:
U
100
IECEQUATION2426 V1 EN-US
For phase-to-phase measurement:
U
100
IECEQUATION2427 V1 EN-US
4. Decrease the voltage slowly and note the reset value.
5. Set and apply about 20% higher voltage than the measured operate value for one phase.
6. Measure the time delay for the TR1 signal and compare it with the set value.
7. Check the inverse time delay by injecting a voltage corresponding to 1.2 × U1>.
8. Repeat the test to check the inverse time characteristic at different over-voltage levels.
9. Repeat the above described steps for Step 2 of the function.
11.5.2.2

Extended testing

1. The tests above can be repeated for 2 out of 3 and for 3 out of 3 operation mode.
11.5.2.3

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.5.3

Two step residual overvoltage protection ROV2PTOV

Prepare the IED for verification of settings outlined in Section
11.5.3.1

Function revision history

Document
revision
A
B
C
D
E
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122
The operate value in secondary volts is calculated according to the following
equations:
1 UBase VT sec
>
× ×
VTprim
3
1 VT sec
>
UBase
× ×
VTprim
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 511 403-UEN Rev. L
GUID-BE4B4A36-CCEE-4020-B7DC-6A83A43D11F5 v2
"Preparing the IED to verify
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Bay control REC670
Commissioning manual
(Equation 23)
(Equation 24)
M13806-43 v6
SEMOD54358-3 v7
settings".