ABB UNITROL 1020 - Page 24

Chapter 3 - Device Overview 
16 3BHS335648 E82 UNITROL 1020 User Manual
*Jumpers can be used to shorten excitation power input with control power Uaux input in
order to reduce wiring
U
M
I
M2
U
NET
I
E
PE
U
PWR
&U
AUX
IE -
IE+
MC2 -
MC2 +
NW3
NW1
ML3
ML2
ML1
1
2
3
4
5
6 7
8 9 10 11 12 13
14 15
16 17
ExCap(-)
AUX L3
PWR L3
AUXL2(-)
PWR L2
AUXL1(+)
PWR L1
PE
Jumper will short-circuit power input with auxiliary input
Ref.
Label
Signal Description
1
MC2-
Machine Current -
2
MC2+
Machine Current +
3
NW3
Network L3
4
NW1
Network L1
5
ML3
Machine L3
6
ML2
Machine L2
7
ML1
Machine L1
8
ExCap(-)
External Capacitor -
9
IE -
Exciter Current -
10
IE +
Exciter Current +
11*
AUX L3
Power Supply L3
12*
PWR L3
Main L3
13*
AUX L2(-)
Power Supply L2 (-)
14*
PWR L2
Main L2
15*
AUX L1(+)
Power Supply L1 (+)
16*
PWR L1
Main L1
17
PE
Protection Earth