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VersiStart i III
6.1.7
20
Inside delta installation, non-bypassed
K1
F1
1/L1
K1
F1
2/T1
Main contactor (strongly recommended)
Semiconductor fuses (optional)
U1(1) U2(4)
3/L2
4/T2
V1(2)
W1(3)
5/L3
M
3
V2(5)
W2(6)
6/T3
04483.D
13
14
K1
CAUTION
When connecting the VersiStart i III in inside delta configuration, always install a main contactor or shunt trip circuit breaker.
6.2
Bypass Contactor
Some VersiStart i III soft starters are internally bypassed and do not require an external bypass contactor.
Non-bypassed soft starters may be installed with an external bypass contactor. Select a contactor with an AC1 rating greater than or
equal to the full load current rating of the connected motor.
6.3
Main Contactor
A main contactor must be installed if the VersiStart i III is connected to the motor in inside delta format and is optional for in-line
connection. Select a contactor with an AC3 rating greater than or equal to the full load current rating of the connected motor.
6.4
Circuit Breaker
A shunt trip circuit breaker may be used instead of a main contactor to isolate the motor circuit in the event of a soft starter trip. The
shunt trip mechanism must be powered from the supply side of the circuit breaker or from a separate control supply.
6.5
Earth Terminals
Earth terminals are located at the back of the soft starter.
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•
6.6
VS i III 23 ~ VS i III 105 have one terminal on the input side (top).
VS i III 145 ~ VS i III 1000 and VS i III 255N ~ VS i III 1600N have two terminals, one on the input side (top) and one on the
output side (bottom).
Power Factor Correction
If power factor correction is used, a dedicated contactor should be used to switch in the capacitors.
CAUTION
Power factor correction capacitors must be connected to the input side of the soft starter. Connecting power factor
correction capacitors to the output side will damage the soft starter.