janitza UMG 605 PRO, User Manual And Technical Data

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UMG 605-PRO
16
6. 3 Measured voltage
The device is designed to measure AC
voltage in 300 V networks, in which
overvoltages of category III can occur.
The device can only determine measured
values if measured voltage of >10 Veff is
present on at least one voltage measurement
input.
c
WARNING!
Risk of injury due
to electric voltage!
Severe bodily injuries or death can occur
due to a failure to observe the connection
conditions for the voltage measurement
inputs.
Therefore, note the following:
•
Do not use the device for voltage
measurement in SELV circuits.
•
Connect the voltages higher than
the#permitted network rated voltages
using voltage transformers.
•
The voltage measurement inputs
on the device are dangerous
if touched!
•
Also install a disconnector for the
measured voltage as described in “6. 1
Disconnectors”.
c
CAUTION!
Malfunction due to
incorrect connection
If the device is connected incorrectly,
incorrect measured values may be returned.
Therefore, note the following:
•
Measured voltages and currents must
derive from the same network.
•
The device is not suitable
for measuring DC voltage.
L3
N
L1
L2
Disconnectors
Fig.23.1 Connection example: Voltage measurement via
short circuit-proof measurement wires
Note the following when selecting
the measurement wires:
• Use measurement wires that are suitable
for 300 V to earth and 520 V conductor
to conductor.
• Fuse the normal measurement wires using
an overcurrent protection device.
• Route normal short circuit-proof
measurement wires via a disconnector.
L
N
Fig. Voltage measurement input with connected phase L
and neutral conductor N
6. 4 Frequency measurement
The device is suitable for measurements in
networks in which the fundamental oscillation
of the voltage is in the range of 15 to 440 Hz.
In order to determine the mains frequency
automatically, a voltage L1-N of greater than
10 Veff must be applied to voltage input V1.
The mains frequency is only measured
on the measurement inputs of the baseline
measurement (V1, V2, V3).