janitza UMG 103-CBM, User Manual And Technical Data

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UMG 103-CBM www.janitza.com
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7.4 Voltage measurement
The device has 3 voltage measurement inputs
(V
L1
, V
L2
, V
L3
) and is suitable for different connec-
tion variants.
L3
N
L1
L2
Isolation device
Fuse (UL/IEC listed)
Load
INFORMATION
As an alternative to the fuse and isolation device,
you can use a line circuit breaker.
Fig. Connection example for direct voltage measure-
ment
INFORMATION
The device’s suitability for measurements in medi-
um and high voltage networks is limited because
it obtains the supply voltage from the measured
voltage and loads the voltage transformer with a
non-linear current.
ATTENTION
Voltages that exceed the permissible nominal
network voltages must be connected via a voltage
transformer.
WARNING
Risk of injury or damage to the device due to
electrical voltage and improper connection!
Failure to comply with the connection conditions for
the voltage measurement inputs can result in dam-
age to the device or serious injury, including death.
Therefore, please observe the following:
·
Switch off your installation before commenc-
ing work! Secure it against being switched
on! Check to be sure it is de-energized!
Ground and short circuit! Cover or block off
adjacent live parts!
·
Do not apply a DC voltage
-
to the voltage measurement inputs.
-
Equip the voltage measurement inputs with
a suitable, marked fuse and isolation device
(alternatively: line circuit breaker) located
nearby.
-
The voltage measurement inputs are dan-
gerous to touch.
·
Connect voltages that exceed the permissi-
ble nominal network voltages via a voltage
transformer.
·
Measured voltages and currents must origi-
nate from the same network.