Verifying The Settings; Completing The Test; Voltage Differential Protection Vdcptov - Hitachi Relion 670 Series Commissioning Manual

1MRK 511 403-UEN Rev. L
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11.5.3.2

Verifying the settings

1. Apply a single-phase voltage either to a single-phase voltage input or to a residual voltage
input with the start value below the set value U1>.
2. Slowly increase the value until ST1 appears.
3. Note the operate value and compare it with the set value.
4. Decrease the voltage slowly and note the reset value.
5. Set and apply a 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>.
( )
t s
IECEQUATION2429 V1 EN-US
where:
t(s)
k1
U
U1>
8. Repeat the test for Step 2 of the function.
11.5.3.3

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.
11.5.4

Voltage differential protection VDCPTOV

Prepare the IED for verification of settings as outlined in section
"Preparing for test"
Bay control REC670
Commissioning manual
Product History
revision
2.2.4 -
2.2.4 -
2.2.5 -
For example, if the inverse time curve A is selected, the trip signals TR1 and TRIP
operate after a time corresponding to the equation:
k 1
=
 
U
−
1
 
>
 
U 1
Operate time in seconds
Settable time multiplier of the function for step 1
Measured voltage
Set start voltage for step 1
in this chapter.
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Testing functionality by secondary injection
"Requirements" and section
Section 11
SEMOD54358-35 v11
(Equation 25)
SEMOD54358-38 v4
SEMOD175258-3 v2
123