ABB RELION RET670 User Manual

1. Phase-to-phase faults in generator
2. Three-phase faults in generator
3.
Phase-to-phase faults in the LV winding of the generator transformer or inter-
connecting bus or cables
4. Three-phase faults in the LV winding of the generator transformer or inter-
connecting bus or cables
Faults in the system in the high voltage (HV) side of generator transformer are:
1. Phase-to-ground faults in the HV side of generator transformer and in the power
system
2. Phase-to-phase faults in the HV side of generator transformer and in the power
system
3. Phase-phase-ground faults in the HV side of generator transformer and in the
power system
4. Three-phase faults in the HV side of generator transformer and in the power
system
Section 8 1MRK 504 163-UUS A
Impedance protection
502 Transformer protection RET670 2.2 ANSI
Application manual

ABB RELION RET670 Specifications

General

Rated Frequency	50/60 Hz
Communication Protocols	IEC 61850, IEC 60870-5-103, DNP3
Operating Temperature Range	-25°C to +55°C
Mounting	Rack Mounting
Input Voltage	100-240 V AC
Protection Functions	Overcurrent Protection
Enclosure	IP20