ABB RET670 Product Guide

Table 56. Negative sequence time overcurrent protection for machines NS2PTOC
Function Range or value Accuracy
Operate current, step 1 - 2 (3-500)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio >95% -
Operate time, start at 0 to 2 x I
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 to 0 x I
set
Min. = 15 ms
Max. = 30 ms
-
Operate time, start at 0 to 10 x I
set
Min. = 5 ms
Max. = 20 ms
-
Reset time, start at 10 to 0 x I
set
Min. = 20 ms
Max. = 35 ms
-
Time characteristics Definite or Inverse -
Inverse time characteristic, step 1 - 2
2
2
I t K=
K=1.0-99.0 ±2.0% or ±40 ms whichever is
greater
Reset time, inverse characteristic,
step 1 - 2
2
2
I t K=
Reset Multiplier = 0.01-20.00 ±5.0% or ±40 ms whichever is
greater
Minimum operate time for inverse time
characteristic, step 1 - 2
(0.000-60.000) s ±0.2% or ±35 ms whichever is
greater
Maximum trip delay at 0.5 to 2 x I
set
,
step 1 - 2
(0.00-6000.00) s ±0.2% or ±35 ms whichever is
greater
Independent time delay at 0.5 to 2 x
I
set
, step 1 - 2
(0.00-6000.00) s ±0.2% or ±35 ms whichever is
greater
Independent time delay for Alarm at
0.5 to 2 x I
set
(0.00-6000.00) s ±0.2% or ±35 ms whichever is
greater
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
ABB 71

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