Table 161. High-impedance differential protection (HIxPDIF)
Characteristic
Value
Operation accuracy
Depending on the frequency of the current measured: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time
1)2)
Minimum
Typical
Maximum
I
Fault
= 2.0 × set
Start value
8 ms
11 ms
19 ms
I
Fault
= 10 × set
Start value
7 ms
9 ms
11 ms
Reset time
Typically <40 ms
Reset ratio
Typically 0.96
Retardation time
<35 ms
Operate time accuracy in definite time mode
±1.0% of the set value or ±20 ms
1)
Measurement mode = default (depends on stage), current before fault = 0.0 × I
n
, f
n
= 50 Hz, fault current in one phase with nominal frequency injected from random phase angle, results based
on statistical distribution of 1000 measurements
2)
Measured with static signal output (SSO)
Table 162. High-impedance differential protection (HIxPDIF) main settings
Parameter
Function
Value (Range)
Step
Operate value
HIxPDIF
1.0...200.0 %I
n
1.0
Minimum operate time
HIxPDIF
20...300000 ms
10
Table 163. Circuit breaker failure protection (CCBRBRF)
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Operate time accuracy
±1.0% of the set value or ±20 ms
Reset time
Typically 40 ms
Retardation time
<20 ms
Table 164. Circuit breaker failure protection (CCBRBRF) main settings
Parameter
Function
Value (Range)
Step
Current value
CCBRBRF
0.05...2.00 × I
n
0.01
Current value Res
CCBRBRF
0.05...2.00 × I
n
0.01
CB failure trip mode
CCBRBRF
1 = 2 out of 4
2 = 1 out of 3
3 = 1 out of 4
-
CB failure mode
CCBRBRF
1 = Current
2 = Breaker status
3 = Both (AND)
-1 = Both (OR)
-
Retrip time
CCBRBRF
0...60000 ms
10
CB failure delay
CCBRBRF
0...60000 ms
10
CB fault delay
CCBRBRF
0...60000 ms
10
1MRS759144 A
REX640
Product version: 1
80
ABB
Summary of Contents for RELION REX640
Page 1: ...RELION PROTECTION AND CONTROL REX640 Product Guide...
Page 128: ...128...
Page 129: ......
Page 130: ......
Page 131: ......
