Power Break
®
Circuit Breakers
Chapter 1. Receiving and Installation
1
1–1 Overview
The Power Break® line of insulated-case circuit breakers
is designed to protect low-voltage power circuits and
equipment. Current models are offered with Magne-
Trip™, MicroVersaTrip Plus™, and MicroVersaTrip PM™
trip units for fault detection.
1–2 Receiving the Breaker
Unpack the circuit breaker and inspect it for shipping
damage. Ensure that the breaker has the proper current,
voltage, and interruption ratings for the application.
The weights of the various frame sizes are listed in Table
1, for reference. Figure 1 shows a breaker with straps for
lifting.
C
C
C
CA
A
A
AU
U
U
UT
T
T
TIIIIO
O
O
ON
N
N
N:::: Do not attempt to lift the circuit breaker by
its operating handle.
Frame
Rating, A
Type
Weight, lbs
800
Manual
Electric
50
64
1600
Manual
Electric
82
96
2000
Manual
Electric
88
102
Table 1. Weights of the various breaker frame sizes, with and
without a motor operator.
Figure 1. Circuit breaker with lifting straps in place.
Storage
The breaker should be placed in service immediately in its
permanent location. However, if it must be stored for an
indefinite period, it should be carefully protected against
condensation, preferably by storage in a warm, dry room.
Circuit breakers for outdoor equipment should be stored
in that equipment only when power is available and heat-
ers are in operation, to prevent condensation.
The breaker should be stored in a clean location, free
from corrosive gases or fumes. In particular, protect the
breaker from moisture and cement dust, as that combina-
tion may be corrosive.
If the breaker is stored for any length of time, it should be
inspected periodically to ensure good mechanical condi-
tion.
1–3 Installation
Bolted Electrical Connections
Using an industry-accepted solvent, remove any foreign
material from the line and load strap surfaces and the
corresponding surfaces of connecting bus and terminal
studs. Ensure that the mating surfaces are smooth and
free of burrs and nicks.
Place the bus connections in position and align the
mounting holes. Insert and fasten the mounting bolts and
washers according to the specifications in Table 2.
Bus Connection
Breaker Frame, A
Bolt Dia.
Torque, in-lbs
800
(1)
1
/
2
in
300
1200–1600
(2)
1
/
2
in
300
2000
(4)
1
/
2
in
300
Table 2. Bolt sizes and mounting torques for bus connections.
Breaker Mounting
For mounting the circuit breaker, use the four
1
/
4
-20
x
1
/
2
-
inch-deep inserts in the back of the breaker. The locations
of the inserts are shown in Figures 2 and 3 for the two
frame sizes. Tighten the mounting bolts to 50 in-lb.
Figure 2. Location of mounting bolt inserts on 800 A frame breakers.
Summary of Contents for Power Break
Page 1: ...g Power Break Circuit Breakers 800 2000 A Frames 240 600 Vac GEH 4693D User s Guide ...
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