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VAMP 221
Arc protection system
Operation and configuration instructions
VAMP Ltd
36
VAMP 24h Technical Support: +358 (0)20 753 3264
VM221.EN013
3.
The current measuring channel is faulty.
Corrective measures:
•
With a clip-on ammeter, check whether the measuring
current travels through the current measuring unit.
•
If the current travels through the unit but the device
does not measure any current, the central unit must be
replaced.
NOTE!
Do not open a loaded current measuring circuit before you have
reliably short-circuited the secondary circuit of the current
transformer. An open secondary circuit in the current
An open secondary circuit in the current
An open secondary circuit in the current
An open secondary circuit in the current
transformer may destroy the current transformer!
transformer may destroy the current transformer!
transformer may destroy the current transformer!
transformer may destroy the current transformer!
3.2.
Using programming switches
Before system implementation, check the positions of the
programming switches in accordance with the following basic
principles:
•
Each I/O unit connected to the communication bus has its
own address (each I/O unit have an unique address).
•
Set the programming switches before connecting the supply
voltage.
•
If you have to change the switch positions once the supply
voltage has been connected, disconnect the supply voltage to
the unit in question for the duration of the programming
and re-configure the system.