10
Installation and removal instructions
for IZM series fixed breaker
three-way Type 32 cable interlock kit
EATON
www.eaton.com
Instructional Leaflet
IL0131187EN
Effective June 2022
Functional test of interlock assembly
Refer to
and
for breaker position in the interlock
configuration . Begin test sequence with all breakers
OPEN
. For
Breaker
A
, verify that the interlock assembly is positioned as shown
in
while in the various states required by the steps below .
For Breakers
B
and
C
, use the figure included in the information leaf-
let for the interlock kit installed on those breakers .
Type 32
Six-cable interlock assembly test . Refer to
for logic details .
•
OPEN all breakers
•
CHARGE and CLOSE Breaker
A
—Breakers
B
and
C
should not be
interlocked (not held OPEN and able to CLOSE, one at a time)
•
OPEN Breaker
A
•
CHARGE and CLOSE Breaker
B
—Breakers
C
and
A
should not be
interlocked (not held OPEN and able to CLOSE, one at a time)
•
OPEN Breaker
B
•
CHARGE and CLOSE Breaker
C
—Breakers
A
and
B
should not be
interlocked (not held OPEN and able to CLOSE, one at a time)
•
OPEN Breaker
C
•
CHARGE and CLOSE Breakers
A
and
B
—Breaker
C
should be
interlocked (held OPEN, not able to CLOSE)
•
CHARGE and attempt to CLOSE Breaker
C
—it should not respond
to CLOSE attempt (no noise, spring discharge, or contact motion)
•
OPEN Breakers
A
and
B
•
CHARGE and CLOSE Breakers
B
and
C
—Breaker
A
should be
interlocked (held OPEN, not able to CLOSE)
•
CHARGE and attempt to CLOSE Breaker
A
—it should not respond
to CLOSE attempt (no noise, spring discharge, or contact motion)
•
OPEN Breakers
B
and
C
•
CHARGE and CLOSE Breakers
C
and
A
—Breaker
B
should be
interlocked (held OPEN, not able to CLOSE)
•
CHARGE and attempt to CLOSE Breaker
B
—it should not respond
to CLOSE attempt (no noise, spring discharge, or contact motion)
•
OPEN Breakers
C
and
A
The mechanical interlock is now properly installed and adjusted . Use
a light amount of supplied lubricant
(F)
as shown in
Figure 2
if any
interlock parts are sticky or do not fully reset . This is only recom-
mended if needed .
Magnum breaker interlock assembly in
OPEN state (not interlocked, able to close) .
Magnum breaker interlock assembly in
interlocked state (open, unable to close) .
Magnum breaker interlock assembly in
closed state (not interlocked) .
Figure 18. Position of interlock based on breaker state
