GE Industrial Solutions EntelliGuard E Circuit Breaker - Manual (Page 9)

©2012 General Electric All Rights Reserved 9
SECTION 3 – LIFTING, MOUNTING AND
INSTALLATION
WARNING
IMPROPER INSTALLATION, OPERATION AND
MAINTENANCE
Ensure only qualified personnel install, operate, service
and maintain all electrical equipment.
Failure to comply with these instructions could
result in death or serious injury.
WARNING
FALLING OBJECT
 Ensure lifting equipment has capability for device
being lifted.
 Wear hard hat, gloves and safety shoes.
Failure to comply with these instructions could
result in death or serious injury.
CAUTION
PRODUCT DAMAGE
 Ensure circuit breaker and its accessories are
always used within their designated ratings.
 Do not allow the circuit breaker to hit a hard
surface while handling.
 Do not drag or slide the circuit breaker across a
hard or rough surface.
Failure to comply with these instructions may result
in product damage.
NOTICE
A factory-installed rejection feature prevents
mismatching circuit breakers and
cassettes/substructures, preventing the insertion of a
circuit breaker with a lower rating into a higher rated
cassette/substructure, or the insertion of a higher
rated circuit breaker into a lower rated
cassette/substructure.
CIRCUIT BREAKER UNPACKING (FIG. 3.1)
1. Inspect the shipping container for obvious signs of
rough handling and/or external damage incurred during
transportation.
2. Record any observed damage for reporting to the
carrier. Ensure all recorded reports and claims include
the order number and nameplate information.
3. Remove the banding straps and lift off the top cover.
4. Remove all packaging material.
5. Remove all product documentation and store properly.
6. Unscrew the mounting screws that fasten the circuit
breaker to the bottom of the shipping pallet and remove
the circuit breaker.
Figure 3.1. Unpacking the Circuit Breaker
BASIC CIRCUIT BREAKER CONSTRUCTION
Figure 3.2. Circuit Breaker Construction
EntelliGuard E circuit breakers consist of rigid front and rear
housings made of thermoset composite resins which
provide high structural strength and excellent dielectric
properties. These housings enclose a contact system
consisting of a moving portion and a fixed portion:
 Moving portion: comprised of multiple finger assemblies
connected to a conductor through flexible copper
connections. The number of finger assemblies depends
on the circuit breaker’s continuous and short circuit
ratings. Each finger assembly has an arcing contact and
a main contact.
 Fixed portion: consists of a main fixed contact which is
brazed to a conductive pad, and arc runner which is
fastened to the conductive pad which guides the arc to
the arc chamber.
Each pole has an arc chamber comprised of arc chamber
molds which houses the de-ion plates and filtering system.
The pole configuration depends upon the breaker frame
size.
The operating mechanism is mounted on the front housing.
The energy stored in the mechanism is used to close the
contact system. The mechanism is coupled to each pole by
a common layshaft/drive shaft.