ABB RET670 Product Guide

Table 24. Restricted earth-fault protection, low impedance REFPDIF
Function Range or value Accuracy
Operate characteristic Adaptable ± 1.0% of I
r
for I ≤ I
r
± 1.0% of I for I > I
r
Reset ratio >95% -
Minimum pickup (4.0-100.0)% of IBase ± 1.0% of I
r
Directional characteristic Fixed 180 degrees or ± 60 to ± 90
degrees
± 2.0 degrees
Operate time, trip at 0 to 10 x
IdMin
Min = 15 ms
Max = 30 ms
-
Reset time, trip at 10 to 0 x IdMin Min = 15 ms
Max = 30 ms
-
Second harmonic blocking 60.0% of fundamental (hidden
setting)
± 1.0% of I
r
Table 25. 1Ph High impedance differential protection HZPDIF
Function
Range or value Accuracy
Operate voltage (10-900) V
I=U/R
± 1.0% of I
r
at I ≤ I
r
± 1.0% of I at I > I
r
Reset ratio >95% at (30-900) V -
Maximum continuous power
U>Trip
2
/SeriesResistor ≤200 W
-
Operate time at 0 to 10 x U
d
Min = 5 ms
Max = 15 ms
Reset time at 10 to 0 x U
d
Min = 75 ms
Max = 95 ms
Critical impulse time 2 ms typically at 0 to 10 x U
d
-
Operate time at 0 to 2 x U
d
Min = 25 ms
Max = 35 ms
Reset time at 2 to 0 x U
d
Min = 50 ms
Max = 70 ms
Critical impulse time 15 ms typically at 0 to 2 x U
d
-
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
54 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