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CHAPTER 4 - Start-up and adjustment of the drive
Power connection for SIZE 224
Fig. 4-5
The connection indicated in Fig. 4-4 and 4-5 includes also (resistors R and contactor Q1) the
in-rush current limit circuit. The connection of this circuit is optional for models 5/10, 10/20,
14/28, 18/36 and compulsory for models 25/50, 35/70, 50/100. In general, the limit circuit
must be inserted in all cases where the autotransformer T1 has a nominal power higher than
8kVA (this rule is also true in case a single autotransformer supplies more than one
convertor).
The soft-start resistors must be short-circuited after 150
200 ms from start up; they must
÷
have a value in the range 10
20
with power 50
100W and can be bought together with the
÷
÷
drive (see chapter 7).
MANIU04.9607 GB 03/97
Page 4.12
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