ABB RET670 Commissioning Manual

5. Check that other zones operate according to their zone timers and that the send
(CS_x) signal is obtained only for the zone and phase configured to generate the
actual signal.
6. Deactivate the receive (CRLx) signal in the IED.
7. Check that the trip time complies with the zone timers and that correct trip outputs,
external signals, and indications are obtained for the actual type of fault generated.
11.11.2.2 Testing permissive overreaching
1. Activate the receive (CRLx) signal in the IED.
2. Apply healthy normal load conditions to the IED for at least two seconds.
3. Apply a fault condition within the permissive zone.
4. Check that correct trip outputs, external signals, and indication are obtained for the
all actual types of fault generated.
5. Check that the other zones operate according to their zone timer and that the send
(CS_x) signal is obtained only for the zones and phases that are configured to give
the actual signal. Also the zone connected to CS_x underreach is giving CS_x in this
mode.
6. Deactivate the IED receive (CRLx) signal.
7. Apply healthy normal load conditions to the IED for at least two seconds.
8. Apply a fault condition within the permissive zone.
9. Check that trip time complies with the zone timers and that correct trip outputs,
external signals, and indications are obtained for the actual type of fault generated.
11.11.2.3 Testing blocking scheme
1. Deactivate the receive (CRLx) signal of the IED.
2. Apply healthy normal load conditions to the IED for at least two seconds.
3. Apply a fault condition within the forward directed zone used for scheme
communication tripping.
4. Check that correct trip outputs and external signals are obtained for the type of fault
generated and that the operate time complies with the tCoord timer (plus relay
measuring time).
5. Check that the other zones operate according to their zone times and that a send
(CS_x) signal is only obtained for the reverse zone.
6. Activate the IED receive (CRLx) signal.
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
262 Transformer protection RET670 2.2 ANSI
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