ABB RED670 User Manual

1. Set RetripMode = No CBPos Check.
2. Apply the fault condition, including
start of CCRBRF, well above the set
current value.
3. Verify that re-trip is achieved after the set time t1, and the back-up trip after
time t2.
4. Apply the fault condition, including start of CCRBRF, with current below set
current value.
5. Verify that re-trip is achieved after set time t1, but no back-up trip is obtained.
11.5.7.5 Verifying the back-up trip mode
M12104-146 v5
In the cases below it is assumed that FunctionMode = Current is selected.
Checking that back-up tripping is not achieved at normal CB tripping
M12104-150 v8
Use the actual tripping modes. The case below applies to re-trip with current check.
1. Apply the fault condition, including start of CCRBRF, with phase current
well above set value IP>.
2. Interrupt the current, with a margin before back-up trip time, t2. It may be
made at issue of re-trip command.
3. Check that re-trip is achieved, if selected, but no back-up trip is obtained.
The normal mode BuTripMode = 1 out of 3 should have been verified in the tests
above. In applicable cases the modes 1 out of 4 and 2 out of 4 can be checked.
Choose the mode below, which corresponds to the actual case.
Checking the case
BuTripMode = 1 out of 4
M12104-165 v6
It is assumed that the earth-fault current setting IN> is below phase current setting
IP>.
1. Set BuTripMode = 1 out of 4.
2. Apply the fault condition, including start of CCRBRF, with one-phase current
below set IP> but above IN>. The residual earth-fault should then be above
set IN>.
3. Verify that back-up trip is achieved after set time. If selected, re-trip should
also appear.
4. Disconnect AC and START input signals.
Checking the case
BuTripMode = 2 out of 4
M12104-179 v7
The earth-fault current setting IN> may be equal to or below phase-current setting
IP>.
1. Set BuTripMode = 2 out of 4.
2. Apply the fault condition, including start of CCRBRF, with one-phase current
above set IP> and residual (earth fault) above set IN>.
3. Verify that back-up trip is achieved after set time. If selected, re-trip should
also appear.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 185
Commissioning manual

ABB RED670 Specifications

General

Rated Frequency	50/60 Hz
Product Type	Protection Relay
Rated Voltage	100-240 V AC/DC
Communication Protocols	IEC 61850, IEC 60870-5-103, DNP3
Operating Temperature Range	-25°C to +55°C
Protection Functions	Differential protection, distance protection, overcurrent protection
Outputs	Binary outputs
Enclosure	IP54
Mounting	19" rack mounting