VAMP 265 - Page 76

2.11 Arc fault protection
(50ARC/50NARC) (optional)
2 Protection functions
Technical description
76
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VM265.EN011
Binary output
The binary output (BO) on the arc option card (see chapters 8.4
and 8.5) can be used to give the light indication signal or any
other signal or signals to another relay's binary input to build
selective arc protection systems. Selection of the BO connected
signal(s) is done with the output matrix (See chapter 5.4). BO
is an internally wetted 48 Vdc signal for BI of other VAMP
relays or dedicated arc protection devices by VAMP.
Delayed light indication signal
There is a delayed light indication output signal available for
building selective arc protection systems. Any light source
combination and a delay can be configured. The resulting
signal is available in the output matrix to be connected to BO,
output relays etc.
Pick up scaling
The per unit (pu) values for pick up setting are based on the
current transformer values.
ArcI>:
1 pu = 1xI
N
= rated phase current CT value
ArcI‟>:
1 pu = 1xI‟
N
= rated phase current CT value
ArcI
01
>:
1 pu = 1xI
01N
= rated residual current CT value
for input I
01
.
ArcI
02
>:
1 pu = 1xI
02N
= rated residual current CT value
for input I
02
.