ABB Relion 650 Series Product Manual page 36

Transformer protection RET650
Version 1.1 ANSI
Current protection
Table 24. Instantaneous phase overcurrent protection PHPIOC (50)
Function
Operate current
Reset ratio
Operate time
Reset time
Critical impulse time
Operate time
Reset time
Critical impulse time
Dynamic overreach
Table 25. Four step phase overcurrent protection OC4PTOC (51/67)
Function
Operate current
Reset ratio
Min. operating current
Independent time delay
Minimum operate time for
inverse characteristics
Inverse characteristics, see
table 61, table 62 and table 63
Operate time, nondirectional
pickup function
Reset time, pickup function
Operate time, directional
pickup function
Reset time, directional pickup
funciton
Critical impulse time
Impulse margin time
36
Range or value
(5-2500)% of lBase
> 95%
20 ms typically at 0 to 2 x I
set
35 ms typically at 2 to 0 x I
set
10 ms typically at 0 to 2 x I
set
10 ms typically at 0 to 10 x I
set
45 ms typically at 10 to 0 x I
set
2 ms typically at 0 to 10 x I
set
< 5% at t = 100 ms
Setting range
lBase
(5-2500)% of
> 95%
lBase
(1-10000)% of
(0.000-60.000) s
(0.000-60.000) s
17 curve types
20 ms typically at 0 to 2 x I
set
30 ms typically at 2 to 0 x I
set
30 ms typically at 0 to 2 x I
set
25 ms typically at 2 to 0 x I
set
10 ms typically at 0 to 2 x I
set
15 ms typically
© Copyright 2011 ABB Power Grids. All rights reserved
M12336-1 v5
M12342-1 v7
1MRK 504 127-BUS B
IP11400-1 v1
Accuracy
± 1.0% of I at I £ I
n n
± 1.0% of I at I > I
n
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Accuracy
± 1.0% of I at I ≤ I
n n
± 1.0% of I at I > I
n
-
± 1.0% of I at I ≤ I
n n
±1.0% of I at I > I
n
± 0.5% ±25 ms
± 0.5% ±25 ms
See table 61, table 62 and table
63
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ABB Power Grids