Chapter 3—Installation and Wiring
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
33
Motor Connections with Potential Transformer(s)
Figure 40. Motor Connections for Standard Overload Control Using Potential Transformers with C445BA…
Legend
Q1 = Cable and motor protection.
Q11 = Run contactor.
External CT = External Current Transformer, connect in
accordance with manufacturer’s instructions.
PTC = Positive Temperature Coefficient (PTC) sensor.
CH1
T1
T2
V1
V2
V3
C445M...
C445BA...
CH1
CH2
CH1
C445U...
C
D0
D1
CH2
1
2
3
4
5
6
7
8
PTC
MOTOR
3~
L2
L3
PE
L1
Optional Modbus
Q11
Q1
POTENTIAL
TRANSFORMER
I1
I2
I3
I4
IC
IC
IC
Q1
Q1
Q2
Q2
Q3
C
Q3
PE
N
L
(+) Us
(-) Us
120-240 VAC
L1