84873401 Crouzet USA, 84873401 Datasheet - Page 121

• Manufacturer Part Number: 84873401
• Description: 3X400VAC FFP MOTOR LOAD CONTROL
• Manufacturer: Crouzet USA

Specifications of 84873401

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For more information www.crouzet.com
4
4
Connections
EWS
EWS2
Principles
Timing diagrams EWS
Timing diagrams EWS2
4
L1
L2
L3
3
1
2
B
C
D
E
3
B
C
D
E
2
1
Phase L1
Phase L2
Phase L3
Relay
Phase L1
Phase L2
Phase L3
Relay
L1
L1
L2
L3
L2
L1
3
L3
L2
3
L3
12
R
12
11
14
R
11
22
14
R
21
24
EWS
3
MA
AR
B
C
D
E
and signalling
Operating principle
EWS/EWS2 relays monitor the correct sequencing of phases L1, L2 and L3 as well as the loss of
one of these phases.
When the phase sequence is correct, the output relay is energised, indicated by a yellow LED.
The relay de-energises (LED off) if one of the following faults occurs : Incorrect sequence of
phases at terminals L1, L2 and L3
Total loss of one phase or all three phases (loss of phase detection threshold < 50 VAC)
4
A1 11
12 14
Isolating switch
Contactor
Alarm
Auxiliary power supply for contactor coil
R
R S T
d1
A2
D1
2
R S
U V W
3
M
~
T
1
EWS
Monitoring of three-phase motor.
Manual re-engage after disappearance
of the fault.
B
C
D
E
and signalling
Isolating switch
Contactor
Alarm
Auxiliary power supply for contactor coil
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