ABB RET670 Commissioning Manual

1. Deactivate the receive (CR) 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 trip time complies with the tCoord timer (plus relay
measuring time).
5. Check that the other zones trip according to their zone times and that a send (CS)
signal is only obtained for the reverse zone.
6. Activate the IED receive (CR) signal.
7. Apply a fault condition in the forward directed zone used for scheme communication
tripping.
8. Check that the no trip from scheme communication occurs.
9. Check that the trip time from the forward directed zone used for scheme
communication tripping complies with the zone timer and that correct trip outputs,
external signals, and indications are obtained for the actual type of fault generated.
11.11.1.4 Testing delta blocking scheme
1. Deactivate the receive (CR) 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 trip time complies with the tCoord timer (plus relay
measuring time).
5. Check that the other zones trip according to their zone times and that a send (CS)
signal is only obtained for the reverse zone.
6. Check that for a forward fault, carrier send (CS) signal is first obtained from the delta
based fault inception detection (as it is not directional) , and immediately inhibited
by the forward zone.
7. Activate the IED receive (CR) signal.
8. Apply a fault condition in the forward directed zone used for scheme communication
tripping.
9. Check that the no trip from scheme communication occurs.
10. Check that the trip time from the forward directed zone used for scheme
communication tripping complies with the zone timer and that correct trip outputs,
external signals, and indications are obtained for the actual type of fault generated.
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
260 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