janitza UMG 605 PRO, Руководство пользователя и технические данные, Страница: 17 / 87

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UMG 605-PRO
12
5. 1 Three-phase 4-conductor systems
The device can be used in three-phase
4-conductor systems (TN, TT networks)
(50 Hz, 60 Hz) with an earthed neutral
conductor. The bodies of the electrical
system are earthed.
The voltage between phase and neutral
conductor may be a maximum of 300 V AC.
UMG605-PRO
Earthing of
the system
DC
AC/DC
PE
230/400V 50/60Hz
L2
L3
N
L1
Auxiliary supply
Voltage measurement
4M
4M
4M 4M
L1 L3 L2 N
4M
L4
N
L1
240V
50/60Hz
5. 2 Three-phase 3-conductor systems
The device can be used in non-earthed three-
phase 3-conductor systems (IT network).
The voltage between phase and phase may
be a maximum of 480 V AC (50 Hz, 60 Hz).
The IT network is not earthed at the neutral
point of the voltage generator. The bodies
of the electrical system are earthed. Earthing
via a high ohm impedance is permitted.
IT networks are only permitted in certain
systems with their own transformers or
generators.
230/400V 50/60Hz
UMG605-PRO
Earthing of
the system
DC
AC/DC
L2
L3
N
L1
Auxiliary supply
4M 4M 4M 4M
L1 L3 L2 N
4M
L4
Impedance
Voltage measurement
400V 50/60Hz
DC
AC/DC
L2
L3
Auxiliary supply
Voltage measurement
4M 4M 4M 4M
L1 L3 L2
4M
L4
Earthing of
the system
Impedance
L1
UMG605-PRO
N
Fig. Schematic diagram, UMG 605-PRO in a TN network
Fig. Schematic diagram, UMG 605-PRO in an IT network with N
Fig. Schematic diagram, UMG 605-PRO in an
IT network without N.