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2
1.3
Design
The shock discharge generator SWG 500 is a completely self-
contained instrument and can be operated without any
additional units. The four main sub-assemblies viz control unit,
high voltage generator, impulse capacitors and the operating
spark gap are mounted in a rugged 19''-housing. Modern
indicating and sensor elements, combined with VDE indicating
elements (VDE 0104) facilitate operation and handling of the
instrument.
A built-in kV meter indicates the surge voltage and measures
the high voltage directly at the capacitor bank.
All operational and indicating elements are mounted an the
front panel of the instrument. The connections for the power
supply, earthing cable and the high voltage output have been
provided at the rear of the instrument.
The connection of the instrument on the high voltage side to
the faulty cable is made by means of a 4 m high voltage lead
with a high voltage plug connector. The instrument cannot be
put into operation unless this high voltage lead is connected.
1.4
Current supply
The SWG 400 is operated from a 220 V AC mains with a
frequency of 45 to 60 Hz. For 240 V operation, an internal
voltage matching for the mains supply of the control unit has
been provided. If the instrument is to be operated from a 110
V AC mains, the high voltage transformer has to be replaced.
The connection change-over for the transformer of the control
unit for 110 V operation has been provided.
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