
30
m
c
L3
N
L1
L2
Important!
The voltage measurement inputs are
hazardous live!
Important!
The UMG604 can only determine
measured values if a measurement-
current voltage greater than 10 Veff
is applied to at least one voltage
measurement input.
Installation
Voltage measurement
The UMG604 is designed for the measurement
of alternating voltages in 300 V systems in
which category III overvoltages can occur.
The UMG604 can only determine measured
values if a measurement-current voltage
greater than 10 Veff is applied to at least one
voltage measurement input.
The following must be noted when selecting
the instrument leads for the voltage
measurement:
The instrument leads required for the
•
voltage measurement must be suitable
for voltages up to 300 VAC to earth and
520 VAC conductor to conductor.
Normal instrument leads must be fused by
•
an overcurrent protective device and routed
via disconnectors.
Short-circuit proof instrument leads must be
•
routed via disconnectors only.
Overcurrent
protective
devices
and
disconnectors must be positioned near the
device and must be easy for the user to
reach.
Fig. 30.1 Connection example: Voltage meas-
urement via short-circuit proof instrument leads.
Disconnector
Содержание UMG 604
Страница 29: ...29 ...
Страница 47: ...47 ...
Страница 76: ...76 Appendix Dimensioned drawings Front view Side view ...