Completing The Test; Overexcitation Protection Oexpvph (24); Verifying The Settings - ABB RET650 Series Commissioning Manual

1MRK 504 136-UUS B
5. Set and apply about 20% higher voltage than the measured operate value for one phase.
6. Measure the time delay for the TRST1 signal and compare it with the set value.
7. Check the inverse time delay by injecting a voltage corresponding to 1.2 × Vpickup>.
( )
t s
ANSIEQUATION2429 V1 EN-US
where:
t(s)
TD1
V
Vpickup> Set pickup voltage for step 1
For example, if the measured voltage jumps from 0 to 1.2 times the set pickup voltage level
and time multiplier TD1 is set to 0.05 s (default value), then the TRST1 and TRIP signals
operate at a time equal to 0.250 s ± tolerance.
8. Repeat the test for step 2.
7.5.3.2

Completing the test

Continue to test another function or end the testing by setting the parameter
Disabled under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then
set the parameter
ROV2PTOV(59N,2UN>)/ROV2PTOV:1 for the function, or for each individual function in a chain, to
be tested next. Remember to set the parameter
has been tested.
7.5.4

Overexcitation protection OEXPVPH (24)

Prepare the IED for verification of settings as outlined in section
settings.
Values of the logical signals for OEXPVPH (24) are available on the local HMI under Main menu/
Tests/Function status/Voltage/OEXPVPH(24,U/f>)/OEXPVPH:1. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
7.5.4.1

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 (24).
Transformer protection RET650
Commissioning manual
For example, if the inverse time curve A is selected, the trip signals TRST1 and
TRIP operate after a time corresponding to the equation:
TD 1
=
æ ö
V
-
1
ç ÷
>
Vpickup
è ø
Operate time in seconds
Settable time multiplier of the function for step 1
Measured voltage
Blocked to No under Main menu/Tests/Function test modes/Voltage/
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Blocked to Yes , for each individual function that
Preparing the IED to verify
Section 7
Testing functionality
(Equation 16)
SEMOD54358-38 v4
TestMode to
M6583-45 v5.1.1
M6583-49 v4
65