Eaton Industrial Switchgear - xStart switching, protections and actuating motors

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5/68 Contactor monitoring devices
2010 CA08103002Z-EN
Description, ordering
General
For safety-related off switching to safety
category 3 and 4 according to EN 954-1,
at present two contactors must be used
in series. Especially with larger
contactors this is an expensive solution.
Application
This is where the CMD can be used. The
function of the CMD is to monitor the
main contacts of a contactor against
welding. For this the control voltage of
the contactor is compared with the state
of the main contacts which is reliably
monitored using a mirror contact (IEC EN
60947-4-1 Annex F). If the coil is de-
energized and the contactor does not
drop out the CMD trips the upstream
circuit-breaker/motor protective circuit
breaker/switch-disconnector via a shunt
release.
Safety
The CMD has a safety-compliant design
so that in safety combinations with a
circuit-breaker/motor protective circuit
breaker/switch disconnector the reliable
switch off in the case of a "welded
contactor" can be guaranteed. In this
application it replaces the series
connection of a second contactor. As a
component it conforms to safety
category 3 according to EN 954-1 and
EN ISO 13849.
Mounting
The CMD can be combined with the
following Eaton components:
• Contactors:
– DILEM
– DILM7 to DILM150
– DILM185(-S) to DILM500(-S):
– DILM580 to DILM1600
– DILH1400 … DILH2000
– SE-1A-PKZ2 and S-PKZ2
For the wiring of the CMD the auxiliary N/C
contact, mirror contact must be according
to IEC/EN 60947-4-1 and the auxiliary N/O
contact must be interlocked and opposing
according to IEC/EN 60947-5-1. Also the
auxiliary N/C contact for the feedback
circuit must have amirror contact function
according to IEC/EN 60947-4-1.
• Motor-protective circuit-breakers/
circuit-breakers:
– PKZ2 + U-PKZ2(18VDC)
– NZM1 + NZM1-XUVL
– NZM2 + NZM2/3-XUV
– NZM3 + NZM2/3-XUV
– NZM4 + NZM4-XUV
– N1 + NZM1-XUVL
– N2 + NZM2/3-XUV
– N3 + NZM2/3-XUV
– N4 + NZM4-XUV
CMD HPL05068EN
Ordering
Part no.
Article no.
Price
See Price List
Std. pack
CMD contactor monitoring device
CMD(24VDC)
106170
1 Off
CMD(220-240VAC)
106172
1 Off
Auxiliary contact requirements per contactor:
CMD Self
maintaining
Feedback
circuit
Electrical
interlock
DOL starter 1 N/O +
1 N/C
1S 1 B
Reversing
starter
1 N/O +
1 N/C
1S 1 B 1 B