Completing The Test; Overexcitation Protection Oexpvph; Verifying The Settings - ABB Relion 670 Series Commissioning Manual

1MRK 504 165-UEN E
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
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.
11.6.3.2

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.6.4

Overexcitation protection OEXPVPH

Prepare the IED for verification of settings outlined in Section
settings".
11.6.4.1

Verifying the settings

1. Enable function.
2. Connect a symmetrical three-phase voltage input from the test set to the appropriate
connection terminals of the overexcitation protection OEXPVPH is configured for a three-
phase voltage input.
A single-phase injection voltage is applied if the function is configured for a phase-to-
phase voltage input.
OEXPVPH is conveniently tested using rated frequency for the injection voltage and
increasing the injection voltage to get the desired overexcitation level.
3. Connect the alarm contact to the timer and set the time delay
4. Increase the voltage and note the operate value
5. Reduce the voltage slowly and note the reset value.
6. Set the alarm time delay to the correct value according to the setting plan and check the
time delay, injecting a voltage corresponding to 1.2 ·
Transformer protection RET670
Commissioning manual
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
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Testing functionality by secondary injection
U1> .
TESTMODE setting to Off .
"Preparing the IED to verify
tAlarm temporarily to zero.
V/Hz> .
V/Hz> .
Section 11
(Equation 105)
SEMOD54358-38 v4
M6583-45 v5
M6583-49 v4
193