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GB
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© Danfoss | Climate Solutions | 2023.06
AQ452034894212en-000201 | 17
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Electrical connection
5.4 Special motor: design for direct or star-delta start
A mechanical unloaded start with bypass solenoid valve (accessories) is required for the
star-delta start.
Designation on the name plate
Sticker on the terminal box
∆
/ Y
Star-delta start-up is only possible for 230 V power supply.
Example:
230 V
∆
Direct start
Star-delta start
400 V Y
Direct start only
∆
∆
∆
V1
W1
U1
V2
U2
W2
L3
L2
L1
∆
∆
∆
L3
L1
V1
W1
U1
V2
U2
W2
L1
L2
L3
L2
∆
∆
∆
V1
W1
U1
V2
U2
W2
L1
L2
L3
