VOLTWERK VC 200 Instrucciones De Servicio página 108

2 Safety
Level of Protection range
performance
200 kVA and 300 kVA AC side
Auxiliary power supply
DC side
350 kVA AC side
Auxiliary power supply
DC side
18
If the DC current is less than the maximum permissible input current
(see Specifications, page 87), the triggering threshold of the circuit
breaker on the right hand wheel can be changed. This can be advisable,
for example, if a small cable cross-section is used. In this way, the trigger
current of the DC circuit breaker can be adapted to the permissible
continuous current of the connected cable. Factors such as
ambient temperatures of the cable,
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DC circuit breaker,
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laying system,
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desired voltage drop,
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type of conductor,
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cable type,
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standards and local regulations
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must be observed during the change. The specified trigger currents relate
to an ambient temperature of the circuit breaker of 40°C. If the central
inverter is ventilated adequately, the ambient temperature of the circuit
breaker will be a maximum of 10°C above the supply air temperature of the
central inverter.
Ambient temperature of DC
circuit breaker [°C]
40
50
60
70
To ensure reliable and smooth operation of the central inverter, the
manufacturer recommends using the values for +50°C. Please note:
If the DC busbars are used (optional), the trigger current for all DC
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circuit breakers must be set to the maximum value.
Surge voltage protection devices
Surge voltage
protection
Type I and type II
Type II and type III
Type II and type III
Type I and type II
Type II and type III
Type I and type II
Operating manual
Trigger current [A]
MIN MED
175 212.5
168 204
160 195
150 185
Rated discharge capacity
7.5 kA, pulse of 10/350 µs
20 kA, pulse of 8/20 µs
20 kA, pulse of 8/20 µs
7.5 kA, pulse of 10/350 µs
20 kA, pulse of 8/20 µs
7.5 kA, pulse of 10/350 µs
Transformerless central inverter
MAX
250
240
230
220