L1, L2, L3
M
3
Contactor
Supply
(e.g. 230VAC)
K3
k3
DOC DO0 DO1 DO2
24VDC
10 11
24VDC
DO3
13 14 15 16 17 18
UMC100
UMC-
PAN
Comm.
interface
0V
I
Lim
Fwd
Stop
k1
GND
(24VDC)
K5
K1
k5
k1
k5k3
3
K3=star
K5=delta
K1=main
L1, L2, L3
M
3
k3
k5
k1
3
K3=star
K5=delta
K1=main
Supply
0V/24V
Control Function Star-Delta Starter
Use this function in a feeder that requires to start/stop a motor in one direction of rotation including the time- or current-cont-
rolled transition from star to delta.
• Relay output DO0 is used by the control function to control the star contactor
• Relay output DO1 is used by the control function to control the delta contactor
• Relay output DO2 is used by the control function to control the main contactor.
• Optionally DI0 can be used for contactor checkback supervision
• Optionally DI4 can be used to start the motor and DI5 to stop it
• Optionally DO3 can be used as fault output
• The voltage dip function is not supported in this control function.
• Adjust parameter YD changeover mode
• Adjust parameter YD starting time. The switch over from Star (Y) to Delta (D) takes place earliest after 1 second.
The parameter YD starting time must therefore be set to at least 1 second.
The following diagram shows the UMC wired for star-delta operation. A signal lamp is connected to DO3 which serves as a fault
output. The motor contactors are connected to DO0, DO1 and DO2. Three auxiliary contacts are used for contactor checkback
monitoring. The motor can be started locally via DI4 and stopped via DI5. The remaining digital inputs can be freely used.
—
Circuit diagram of the UMC for controlling a motor in star-delta mode. The checkback contacts k3/K5 and K1 are optional
Parameters for ∆-circuitry
Current Ie1 = nominal current
Current factor = 100 (in case of a current transformer: 100 x transmission ratio)
Parameters for √3-circuitry
Current Ie1 = nominal current
Current factor = 173 (in case of a current transformer: 173 x transmission ratio)
80
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