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Instruction Booklet IB 52-01-TE
Effective October 2010
6
Fig. 9a Handle in "OPEN"
(Handle is shown with optional 90 degree handle ex tension.)
3.2.2.
Mechanical
(non-standard)
The Electrical Int erlock h as superceded this
device, see Addendum pg. 19. The Mechanical
Anti-Close Interlock is available on request only.
The CM52 is supplied with a mech anical anti-
close interlock, which interfaces with a welded
pad located on the inside edge o f the en closure
door. This pad depresses an exposed rod that
will hold the breaker in a mechani cal trip free
state. It will also prevent electrical closure of the
break er in the instance where a CM52 breaker is
being connected (levered-in) to en ergize bus and
the outside operating handle was left in the
AUTO position.
permits a close o f a b reaker in its connected
position only if the door has been closed and the
outside handle is placed either in the AUTO or
CLOSE positions. It is supplied with a defeat
mechanism, which permits an operator to open
the enclosure door while the break er remains
closed. This entire anti-close assembly is located
on the cassette and can be revers ed for either left
hand or right hand door hinging.
3.2.3
Installing
Network Transformer
1.
Remove front fuse cov er barrier cov er.
2.
Remove fuse links or internal fuses.
3.
Remove Interphase barriers by lifting
barrier up and tilting fo rward.
barriers will lift directly out.
4.
Mount
trans former
provided
manu facturer
provided with the Network Protector.
*Because of the close p roximity between ph ases
A & B, and B & C to the throat mounting holes,
Effective 11/05/08 (super cedes 11/19/03) IB 52-01-TE
6
EATON COrPOrATION www.eaton.com
Fig. 9b Handle in "AUTO"
Anti-Close
Interlock
The Anti-Close interlock
Network
Protecto r
to
The
Network
Protector
to
fl ange
using
g asket
by
the
trans form er
and
th e
hardware*
Instructions for the Eaton Type CM52
Network Protectors 800 to 4500 Amperes
Fig. 9c Handle in "CLOSE"
you may need to us e the four special Allen head
bolts with an Allen extender provided in the
hardware bag.
*On 800A – 2000A design units only
SECTION IV - CIRCUIT BREAKER
DESCRIPTION AND OPERATION
4.1
INTRODUCTION
CM52 circuit breakers are available in both draw
out and fixed mounting configurations.
majority of features are common to both
con figurations and will be discussed in this
section.
Controls and indicators for both draw out and
fix ed circuit breakers are functionally grouped
on the front of the circuit breaker.
4.2
BASIC
CIRCUIT
ASSEMBLY
Fig. 10 CM52 w/ Breaker withdrawn
The CM52 circuit breakers use a rigid frame
housing
construction
of high
engineered thermos et composite resins.
IB -52-01-TE
A
BREAKER
temperature
This
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