Motor Wiring - ABB UMC100.3 Manual

U M C 1 0 0 . 3 U N I V E R S A L M O T O R C O N T R O L L E R T E C H N I C A L D E S C R I P T I O N
24

Motor Wiring

The following diagram shows different methods of connecting a motor. For a reliable motor protection it is essential to set
the correct nominal current I
Note:
For inner-delta wiring the parameter Current Factor needs to be set to 1.73 (=√3). The √3 circuitry is normally used for larger
motors to reduce the current transformer size.
Single phase
Power line Power line: 690 V
L1 L2
N L
UMC UMC
N L U1
1
W2
Example for motor:
Example for motor:
Motor rating plate Motor rating plate
230 V 400 V / 690 V
4.9 A / 2.8 A
2.5 A
I = 2.5 A I = 2.8 A / I
e P
Parameter
Parameter
Set Current = 2.80
Set Current = 2.50
Current factor = 100
Current factor = 100
Terminal box
U1
W2
I = Actual current / phase
P
I = Set current
SC
It is optional to feed N through the UMC if ground fault detection is disabled.
Related Parameters:
• Nominal current Ie1
• Current factor
.
e
Star Delta
Power line: 400 V
I
P
L1 L2 L3
L3
UMC
I =
SC
I
P
V1 W1 U1 V1 W1
U2 V2 W2 U2 V2
Example for motor:
Motor rating plate
400 V / 690 V
4.9 A / 2.8 A
= 2.8 A I = 4.9 A / I
SC P SC
Parameter
Set current = 4.90
Current factor = 100
Terminal box
V1 W1 U1 V1
W2
U2 V2 U2
3 wiring
Power line: 400 V
I I
P P
L1 L2 L3
UMC
I =
SC
I
P
U1 V1 W1
W2 U2 V2
Example for motor:
Motor rating plate
400 V / 690 V
4.9 A / 2.8 A
= 4.9 A I = 4.9 A / I = Ip/√3=2.80
P SC
Parameter
Set current = 4.9
Current factor = 173
Terminal box
W1 U1 V1 W1
W2
V2 U2 V2
I =
SC
I * 0.577
P