ABB RET670 Commissioning Manual

11.12.1.2 1p/3p operating mode
In addition to various other tests, the following tests should be performed. They depend on
the complete configuration of an IED:
Procedure
1. Make sure that TripLockout and AutoLock are both set to Disabled.
2. Initiate different single-phase-to-ground faults one at a time.
3. Initiate different phase-to-phase and three-phase faults.
Consider using an adequate time interval between faults, to overcome a reset time,
which is activated by SMBRREC (79). A three-pole trip should occur for each
separate fault and all of the trips. Functional outputs TRIP, all TR_A, TR_B, TR_C
and TR3P should be active at each fault.
No other outputs should be active.
4. Initiate a single phase-to-ground fault and switch it off immediately when the trip
signal is issued for the corresponding phase. Initiate the same fault once again within
the reset time of the used SMBRREC (79).
5. Initiate a single phase-to-ground fault and switch it off immediately when the trip
signal is issued for the corresponding phase. Initiate the second single phase-to-
ground fault in one of the remaining phases within the time interval, shorter than
tEvolvingFault (default setting 2.0s) and shorter than the dead-time of SMBRREC
(79), when included in the protection scheme.
Check that the second trip is a three-pole trip and that a three-phase autoreclosing
attempt is given after the three-phase dead time. Functional outputs TRIP, TR_A,
TR_B, TR_C and TR1P should be active during the first fault. No other outputs
should be active. Functional outputs TRIP, all TR_A, TR_B, TR_C and TR3P
should be active during second fault.
11.12.1.3 1p/2p/3p operating mode
In addition to other tests, the following tests, which depend on the complete configuration
of an IED, should be carried out.
Procedure
1. Make sure that AutoLock and TripLockout are both set to Disabled.
2. Initiate different single-phase-to-ground faults one at a time.
Take an adequate time interval between faults into consideration, to overcome a
reset time, which is activated by the autorecloser function SMBRREC (79). Only a
1MRK 504 165-UUS - Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 271
Commissioning manual

ABB RET670 Specifications

General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24