VAMP Ltd
Arc protection system
Technical description
VAMP 221
VM221.EN013
VAMP 24h Technical Support: +358 (0)20 753 3264
39
Fill in a testing report (see model report in the User’s Manual)
during the test.
Close the hard wire connection terminals opened during testing
and remove temporary connections. The system is ready for
commissioning.
3.4.
Arc protection current measuring
based on earth-fault current
step down
P2
P1
100/1 to 2000/1
CTs
CB
For example :
- Max E/F 300-600A
- phase setting 1.3 x In
- E/F setting 5% of primary ratio
=> if CT ratio 2000/1 primary setting = 100A
=> Io setting = 0.05 xIn
L1
L2
L3
NER
10-20 ohm
IL1
IL2
IL3
~
VAMP 221
Front
T1
T2
T3
A1
VAMP221block
X1:1
X1:2
X1:3
X1:4
X1:5
X1:6
X3:17
X3:18
X1:8
X1:9
X1:10
X1:11
X1:12
X1:15
X1:16
X7
X1:7
IF (no)
X1:17
X1:18
IF (nc)
X1:19
X1:20
T4
X1:13
X1:14
X6:1
X6:2
Latch
L> & I>
CBFP
100 ms
Relay Matrix
Master
non Latch
L>
Fast
150 ms
Slave
&
I>
L>
X3:1GND
X3:2 +24V
X3:3 RS_B
X3:4 RS_A
X3:5 CAN_H
X3:6 CAN_L
Communication
X3:8 La>in
X3:9 Lb>in
X3:10 I>in
X3:11 La>out
X3:12 Lb>out
X3:13 GND
X3:14 GND
BIO
EF-application
Figure 3.4-1 Arc protection current measuring based on earth-fault current
P2
P1
100/1 to 2000/1
CTs
CB
For example:
- Phase setting 1.3 x In
- E/F setting 5% of primary ratio
=> if CT ratio 2000/1 primary setting = 100A
=> setting = 0.33 x In
L1
L2
L3
300/1
Maximum earth fault
current 300...650 A
Earth Compensator
NER
10-20ohm
IL1
IL2
IL3
~
VAMP 221
Front
T1
T2
T3
A1
VAMP221block
X1:1
X1:2
X1:3
X1:4
X1:5
X1:6
X3:17
X3:18
X1:8
X1:9
X1:10
X1:11
X1:12
X1:15
X1:16
X7
X1:7
IF (no)
X1:17
X1:18
IF (nc)
X1:19
X1:20
T4
X1:13
X1:14
X6:1
X6:2
Latch
L> & I>
CBFP
100 ms
Relay Matrix
Master
non Latch
L>
Fast
150 ms
Slave
&
I>
L>
X3:1GND
X3:2 +24V
X3:3 RS_B
X3:4 RS_A
X3:5 CAN_H
X3:6 CAN_L
Communication
X3:8 La>in
X3:9 Lb>in
X3:10 I>in
X3:11 La>out
X3:12 Lb>out
X3:13 GND
X3:14 GND
BIO
EF-application_opt2
Figure 3.4-2 Arc protection current measuring based on earth-fault current
