Completing The Test; Current Protection; Instantaneous Phase Overcurrent Protection 3-Phase Output Phpioc; Measuring The Operate Limit Of Set Values - ABB RELION REG670 Commissioning Manual

Section 12
Testing functionality by secondary injection
4. Close the switch to the station earth and check that the trip from the rotor earth fault will
be given after the set delay time.
5. Open the switch to the station earth and check that the trip signal resets
instantaneously.
6. Connect an adjustable resistor to the field circuit (221 on RXTTE4). Decrease this resistor
from a large value until the function operates and check monitored value
When the generator has been started the service value of injection voltage and injection
current shall be checked so that there is no risk for unwanted trip due to large capacitive
detected current.
12.4.16.2

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.
12.5

Current protection

12.5.1 Instantaneous phase overcurrent protection 3-phase output
PHPIOC
Prepare the IED for verification of settings as outlined in section
section
To verify the settings the following fault type should be tested:
• Phase-to-earth fault
Ensure that the maximum continuous current, supplied from the current source used for the
test of the IED, does not exceed four times the rated current value of the IED.
12.5.1.1

Measuring the operate limit of set values

1. Inject a phase current into the IED with an initial value below that of the setting.
2. Set the operation mode to
3. Increase the injected current in the Ln phase until the TRL (n=1–3) signal appears.
4. Switch the fault current off.
5. Compare the measured operating current with the set value.
6. Set the operation mode to
operation.
12.5.1.2 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.
154
"Preparing for test" in this chapter.
Observe: Do not exceed the maximum permitted overloading of the
current circuits in the IED.
1 out of 3 .
2 out of 3 and inject current into one of the phases. Check - no
1MRK 502 067-UEN B
ICOSFI .
SEMOD158692-35 v2
TestMode setting to Off .
SEMOD53531-1 v1
"Requirements" and
TestMode setting to Off .
Commissioning manual
M11754-3 v7
M11754-11 v6
M11754-24 v5