janitza UMG 605US, Руководство по эксплуатации

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UMG 605US
Three-phase 3-wire systems
The UMG605US can be used in unearthed
three-phase 3 wire systems (IT system). The
conductor to conductor voltage may not
exceed 480V AC (50 Hz, 60 Hz).
The UMG605US is only suitable for
environments in which the impulse voltage
withstand level of 4 kV (overvoltage category
III) is not exceeded.
In the IT system the neutral point (star point)
of the voltage generator is not earthed. The
bodies of the electrical system are earthed.
Earthing via high-resistance impedance is
allowed.
IT systems are only allowed in certain systems
with their own transformer or generator.
U
L-L
66 V
115 V
120 V
127 V
200 V
230 V
240 V
260 V
277 V
347 V
280 V
400 V
415 V
440 V
480 V
Fig. 16.1 Table of rated voltages of the grid
suitable for the voltage inputs.
Maximum rated voltage
of the grid