ABB RET670 Product Guide

Table 65. Rate-of-change frequency protection SAPFRC
Function Range or value Accuracy
Operate value, start function (-10.00-10.00) Hz/s ±10.0 mHz/s
Operate value, restore enable frequency (45.00-65.00) Hz ±2.0 mHz
Definite restore time delay (0.000-60.000) s ±0.2% or ±100 ms whichever is
greater
Definite time delay for frequency gradient trip (0.200-60.000) s ±0.2% or ±120 ms whichever is
greater
Definite reset time delay (0.000-60.000) s ±0.2% or ±250 ms whichever is
greater
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
76 ABB

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