Function Revision History; Checking The Phase Current Operate Value, Ip; Checking The Residual (Earth Fault) Current Operate Value In> Set Below Ip; Checking The Re-Trip And Back-Up Times - ABB Relion 650 Series Commissioning Manual

1MRK 505 395-UEN Rev. G
To verify the settings in the most common back-up trip mode 1 out of 3, it is sufficient to test phase-
to-earth faults.
At mode 2 out of 4 the phase current setting, IP> can be checked by single-phase injection where the
return current is connected to the summated current input. The value of residual (earth fault) current
IN set lower than IN> is easiest checked in back-up trip mode 1 out of 4.
9.5.6.1

Function revision history

Document
revision
A
B
C
D
E
9.5.6.2 Checking the phase current operate value, IP>
The check of the IP> current level is best made in FunctionMode = Current and BuTripMode = 1 out
of 3 or 2 out of 4.
1. Apply the fault condition, including START of CCRBRF, with a current below the set IP>.
2. Repeat the fault condition and increase the current in steps until a trip occurs. Note that the
START signal shall be re-applied for each new current value.
3. Compare the result with the set IP>.
9.5.6.3 Checking the residual (earth fault) current operate value IN> set below IP>
Check the low set IN> current where setting FunctionMode = Current and setting BuTripMode = 1 out
of 4
1. Apply the fault condition, including START of CCRBRF, with a current just below set IN>.
2. Repeat the fault condition and increase the current in steps until trip appears. Note that the
START signal shall be re-applied for each new current value.
3. Compare the result with the set IN>.
4. Disconnect AC and START input signals.
9.5.6.4

Checking the re-trip and back-up times

The check of the set times can be made in connection with the check of operate values above.
Choose the applicable function and trip mode, such as FunctionMode = Current and RetripMode =
UseFunctionMode.
1. Apply the fault condition, including start of CCRBRF, well above the set current value. Measure
the time from START of CCRBRF.
2. Check the re-trip t1 and back-up trip times t2 and t3.
Line differential protection RED650
Commissioning manual
Product History
revision
2.2.1 I>BlkCBPos setting functionality correction.
2.2.1 -
2.2.1 -
2.2.4 -
2.2.5 -
If No CBPos Check or Retrip off is set, only back-up trip can be used to check set
IP>.
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Section 9
Testing functionality by secondary injection
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