Section 2 Lifting, Mounting And Installation; Trip Unit Removal And Replacement; Power Break I And Power Break Ii Insulated Case Circuit Breakers; Wavepro Circuit Breakers - GE EntelliGuard TU Installation, Operation And Maintenance Manual

EntelliGuard® TU Trip Unit
Section 2 – Lifting, Mounting and Installation
SECTION 2 LIFTING, MOUNTING AND
INSTALLATION
DANGER
ELECTROCUTION
•
Ensure the circuit breaker has been tripped,
indicating OFF and that applicable lock-out/tag-
out requirements are met and followed.
•
Ensure the main springs are fully discharged.
•
Do not touch the circuit breaker's isolating
contacts during lifting.
Failure to comply with these instructions will result
in death or serious injury.
WARNING
IMPROPER INSTALLATION, OPERATION, SERVICE AND
MAINTENANCE
•
Ensure only qualified personnel install, operate,
service and maintain all electrical equipment.
•
Do not perform any maintenance, including
breaker charging, closing, tripping, or any other
function that could cause significant movement of
circuit breaker while it is on the draw-out
extension rails.
•
Ensure circuit breaker is always left in the
CONNECTED, TEST or DISCONNECTED position to
avoid mispositioning of the breaker and flashback.
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.
•
Ensure the correct trip unit is paired with the
correct circuit breaker.
•
Do not use excessive force when installing a trip
unit.
•
Do not allow circuit breaker to hit a hard surface
while handling.
•
Do not drag or slide circuit breaker across a hard
or rough surface.
Failure to comply with these instructions may
result in product damage.
16
Courtesy of NationalSwitchgear.com

TRIP UNIT REMOVAL AND REPLACEMENT

Power Break I, Power Break II, WavePro and AKR Trip
Units have rejection pins, installed on the rear of these
trip units, to prevent installation of an incorrect trip unit
into a breaker.
Replacement of a trip unit always requires repeating the
setup procedures
Power Break I and Power Break II Insulated Case
Circuit Breakers
The trip unit procedures for Power Break I and Power
Break II circuit breakers are very similar and are outlined
below. The EntelliGuard TU trip unit for a Power Break I is
different than that for a Power Break II (see Section 1).
Ensure the correct trip unit is used.
Trip Unit Removal
1. Loosen the four #8-32 screws on the circuit breaker
trim-plate assembly and remove the trim plate.
2. Loosen the four #10-32 screws at the corner of the
breaker cover. Remove the cover from the breaker
face.
3. Pull the trip unit locking lever to the right, then hold
the trip unit near the battery cover and lift it straight
out of the circuit breaker.
Trip Unit Reinstallation
1. Pull the trip unit locking lever to the right. While
holding the lever, carefully align the connector on the
rear of the trip unit with the connector in the breaker.
Press down on the trip unit while holding it near the
battery cover. When the trip unit is fully seated, slide
the locking lever back to the left.
2. Reinstall the breaker top cover and tighten the four
#10-32 screws to 32 in-lb.
3. Replace the trim plate and tighten the four #8-32
screws to 20 in-lb.

WavePro Circuit Breakers

Removal
1. Open the circuit breaker and remove it from the
cubicle or substructure. Place it on a suitable work
surface.
2. For 800 A, 1600 A and 2000 A frame circuit breakers,
insert the racking handle (catalog number
568B731G1) and move the racking mechanism to the
TEST position, as shown on the draw-out position
indicator.
3. Depress the OPEN button to close the racking door.
4. Remove the wire forms and remove the trim plate
from the breaker.
© 2008 General Electric All Rights Reserved
09/25/08