VAMP 220 / 220R Arc protection system
User manual
VAMP Ltd
12
Vamp 24h support phone : +358 (0)40 573 6316
VM220.EN004
VAM
12 CD
POWER
COM
TEST/ERROR
SENSOR ADDR.
COM1 COM2
VY005A
ARC SENSORS 1 ... 10
24 V
1 2 3 4 5 6 7 8 9 10
Made in Finland
T
E
M
P
S
S
I
++
Figure 2.2-1 Slave unit VAM 12 CD.
When the system operates due to an arc fault, information of
the sensor that caused the operation is forwarded by the slave
unit to the master unit. The slave number and sensor number
is then displayed by the master unit.
The slave unit supervises all its sensors continuously. In an
internal fault situation the fault information is transferred to
the master unit and the fault can be viewed on the display of
the master unit.
A fault alarm is also given if an arc sensor connected to the
slave unit remains in active state for more than 7 s. This can
happen, for instance, if the arc sensor is exposed to direct sun
light. At the same time the corresponding slave unit is
disconnected from the master unit in order to prevent false
circuit-breaker trippings. When the interference light
disappears, the function of the slave unit is restored.
2.3. Arc sensor VA 1 DA
The arc sensor is a light sensitive element, which is activated
by strong light. Arc sensors should be mounted in the
switchgear cubicles in such a way that they cover the space to
be protected as completely as possible.
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