VAMP 259 - Arc Fault Protection (50 ARC;50 NARC)- Optional

Technical description
2 Protection functions
2.23 Arc fault protection
(50ARC/50NARC)- optional
VM259.EN007
VAMP 24h support phone +358 (0)20 753 3264
127
F = Editable when force flag is on
Recorded values of the latest eight faults
There is detailed information available of the eight latest
faults: Time stamp, fault value and elapsed delay.
Recorded values of the programmable stages PrgN (99)
Parameter
Value
Unit
Description
yyyy-mm-dd
Time stamp of the recording, date
hh:mm:ss.ms
Time stamp, time of day
Flt
pu
Fault value
EDly
%
Elapsed time of the operating time
setting. 100% = trip
SetGrp
1
2
Active setting group during fault
2.23. Arc fault protection (50ARC/50NARC)-
optional
NOTE! This protection function needs optional hardware in slot X6. More details
of the hardware can be found in chapters 8.4 and 9.1.8).
Arc protection is used for fast arc protection. The function is
based on simultaneous light and current measurement. Special
arc sensors are used to measure the light of an arc.
Three stages for arc faults
There are three separate stages for the various current inputs:

ArcI>
for phase-to-phase arc faults. Current inputs I
L1
,
I
L2
, I
L3
are used.

ArcI
0
>
for phase-to-earth arc faults. Current input I
01
is
used.
Light channel selection
The light information source to the stages can be selected from
the following list.


No sensor selected. The stage will not work.

S1
Light sensor S1.

S2
Light sensor S2.

S1/S2
Either one of the light sensors S1 or S2.

BI
Binary input of the arc card. 48 Vdc.

S1/BI
Light sensor S1 or the binary input.

S2/BI
Light sensor S2 or the binary input.

S1/S2/BI
Light sensor S1 or S2 or the binary input.