Klockner Moeller Electric Parts from KlocknerMoeller.net
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Call Toll Free!
1-877-595-9616
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Largest Authorized Stocking USA Distributor
Representing
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Electronic motor starters and drives
Soft starters DM4 |
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| Standard applications (selector
switch) |
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| Delta circuit |
Normally, soft starters are connected directly in
series (in-line) with the motor. The DM4 soft starters also allow a
delta connection.
Advantage:
- This is a less expensive alternative since the soft starter has
to deliver only 58 % of the motor’s rated current.
Disadvantages over in-line connection:
- As in a star-delta circuit, the motor must be connected with six
conductors.
- The DM4’s overload protection is active only in one phase, so that
additional motor protection must be fitted in the parallel phase or
in the supply cable.
Note:
The delta connection is more cost-effective at motor ratings over 30
kW and when replacing star-delta switches.
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