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= Key 1
= Key 2
= Key 3
= Maximum or consumption = Minimum or supply.
Putting into service
The device should be put into service as follows:
-
Install the device.
-
Connect auxiliary voltage Uh
.
The size of the auxiliary voltage to be connected must be
according to the details on type plate.
The input of the auxiliary voltage (terminal 14,
15) of UMG503 is suitable for rated voltage up
to 300VAC against ground (PE). Higher voltage
between auxiliary voltage (terminal 14, 15) and ground
(PE) can damage the UMG503. To avoid overvoltage at
auxiliary voltage input, the auxiliary voltage should be
earthed.
The wiring for the auxiliary voltage must be suited for
operating voltage up to 300VAC against ground.
- program
current and voltage transformer
.
Attention!
• A switch or power breaker must be provided for
the auxiliary voltage within the installation.
• The switch must be installed near the device and
must have an easy access for the user.
• The switch must be marked as a breaker for this
device.
• Please ensure, that voltage and frequency match
the type plate before connecting it to the auxiliary
voltage!
• The device may be operated with earthed housing
only!
• Conductors with single solded wires are not
suited for connection to screw clamps!
• The screw clamps may only be connected in
dead condition.
Connection example 1
Four wire measurement with three current transformers
- Connect
measurement current
(max. 6A). Check
measurement current indication. Short-circuit current
transformer and check, whether the measurement current
indication is zero Ampere.
Attention!
None earthed current transformer clamps are
dangerous to be touched.
Current transformers, which are not loaded
secondarily, can lead live voltage and should be
short circuited.
- Check
phase assignment
.
The assignment of outer conductor and current
transformer is correct, if no voltage occurs between outer
conductor and the respective current transformer
(primary).
- Connect
interface
(RS485 2-wire). Please use an
interface converter (RS485/RS232), when you connect it
to the COM-interface of a PC.
Ꮨ
Ꮨ
Ꮨ
- Connect
measurement current
(max. 500VAC against
ground) and check measuring voltage indication.
Attention!
The wiring for the measurement voltage must
be suitable for a voltage up to 500VAC against
ground and 870VAC phase to phase.
Attention!
For connection examples 6 and 8 the option
"three wire measurement" is required. In
networks without neutral conductor, voltage
transformers are required and must be connected
according to the respective diagram.