4. proteCtIon unItS
4.1 ADJuStMent SeleCtorS
n and A type units
n and A type protection unit selectors
Selector
Function
1
Nominal current
2
Trip by current overload
3
Delay time of Ir current
4
Trip by timed short-circuit current
5
Delay time of Is current
Trip by instantaneous short-
6
circuit current
7
Shortage current to ground
8
Delay time of Ig current
p and S type protection unit selectors
Selector
Function
1
Nominal current
2
Delay time of Ir current
3
Trip by timed short-circuit current
4
Delay time of Is current
Trip by instantaneous
5
short-circuit current
6
Shortage current to ground
7
Delay time of Ig current
p and S type units
Short
Adjustment range
Iu
(0,5 - 0,6 - 0,7 - 0,8 - 0,9 - 1,0) x In
(0,8 - 0,83 - 0,85 - 0,88 - 0,89 - 0,9 - 0,93 -
Ir
0,95 - 0,98 - 1,0) x Iu
(0,5 - 1 - 2 - 4 - 8 - 12 - 16 - 20 - off) s
tr
Is
(1,5 - 2 - 3 - 4 - 5 - 6 - 8 - 10 - off) x Ir
I²t off: (0,05 - 0,1 - 0,2 - 0,3 - 0,4) s @ 10xIr
tsd
I²t on: (0,1 - 0,2 - 0,3 - 0,4) s @ 10xIr
Ii
(2 - 3 - 4 - 6 - 8 - 10 - - 15 - off) x In
(0,2 - 0,3 - 0,4 - 0,5 - 0,6 - 0,7 - 0,8 - 1 - off)
Ig
I²t off: (0,05 - 0,1 - 0,2 - 0,3 - 0,4) s
tg
I²t on: (0,1 - 0,2 - 0,3 - 0,4) s
Short
Adjustment range
Ir
(0,4 - 0,5 - 0,6 - 0,7 - 0,8 - 0,9 - 1,0) x In
tr
(0,5 - 1 - 2 - 4 - 8 - 12 - 16 - 20 - off) s @ 6xIr
Is
(1,5 - 2 - 3 - 4 - 5 - 6 - 8 - 10 - off) x Ir
I²t off: (0,05 - 0,1 - 0,2 - 0,3 - 0,4) s @ 10xIr
tsd
I²t on: (0,1 - 0,2 - 0,3 - 0,4) s @ 10xIr
Ii
(2 - 3 - 4 - 6 - 8 - 10 - 12 - 15 - off) x In
Ig
(0,2 - 0,3 - 0,4 - 0,5 - 0,6 - 0,7 - 0,8 - 1 - off) x In
I²t off: (0,05 - 0,1 - 0,2 - 0,3 - 0,4) s
tg
I²t on: (0,1 - 0,2 - 0,3 - 0,4) s
English
open Circuit Breaker
@ 6xIr
x In
ABW | 27