janitza UMG 512-Pro, User Manual And Technical Data

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UMG 512-PRO www.janitza.com
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7.5 Measured voltage
The device has 4 voltage measurement inputs
(V1 to V4) located on the back of the device.
·V1 to V3 are for the main measurement.
·V4 is for auxiliary measurement.
In the following, the connections are referred to as
auxiliary and main measurement.
7.5.1 Overvoltage
The voltage measurement inputs are suitable for
measurements in networks where overvoltages of
category 600 V CAT III can occur.
7.5.2 Frequency
The device:
·Is suitable for measurement in networks in which
the fundamental oscillation of the voltage is in
the range from 15 Hz to 440 Hz.
·Measures the frequency only at the measure-
ment inputs of the main measurement.
For the automatic determination (wide range) of
the mains frequency, a voltage L1-N of more than
10 Vrms must be applied to voltage measurement
input V1.
10 A (UL/IEC listed)
L1 N PE L3 L2
Fig. Connection example for voltage measurement.
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
damage 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.
INFORMATION
As an alternative to the fuse and isolation device,
you can use a line circuit breaker.
INFORMATION
In the case of a main measurement on a three-
phase 3-conductor network, the auxiliary mea-
surement can no longer be used as a measure-
ment input.
INFORMATION
To determine the frequency for a measurement
with the auxiliary measurement, a voltage must be
connected to the main measurement.