janitza UMG 509, Operation Manual And Technical Data, Page: 21 / 124

21
UMG 509
When connecting the voltage to be measured,
the following must be observed:
• A suitable circuit breaker must be fitted
to disconnect and de-energise the UMG 509.
• The circuit breaker must be placed in the vicinity
of the UMG 509, be marked for the user and easily
accessible.
• Use a UL/IEC approved circuit breaker 10A (Type
C) for the overcurrent protection and disconnector.
• The overcurrent protection must have a rated
value, which is suitable for the short circuit current
at the connection point.
• Measured voltages and measured currents must
derive from the same network.
c
Please note!
Voltages that exceed the allow nominal
network voltages must be connected via
a voltage transformer.
c
Please note!
The UMG 509 is not suitable for measuring
DC voltages.
c
Please note!
T h e v o l t a g e m e a s u re m e n t i n p u t s
on the UMG 509 are dangerous if touched!
c
Please note!
The voltage measurement inputs may not
be used for voltage measurement in SELV
circuits (safe extra low voltage).