GE Industrial Solutions Power Break II Switches, 800-4000A Frames, 240-600Vac - Manual (Page 9)

Power Break® II Switches
Chapter 1. Introduction
1
1-1 Overview
Power Break® II insulated-case switches are designed to
serve low-voltage power circuits and equipment. They are
available with and Power+™ Control Units for operation
of accessories and optional ground-fault detection.
1-2 Receiving the Switch
Unpack the switch and inspect it for shipping damage.
Ensure that the switch has the proper current, voltage,
and interruption ratings for the application by comparing
the catalog number with the table in the Getting Started
section on the inside front page.
The weights of the various frame sizes are listed in Table
1, for reference.
Frame Rating Operation
Type
Weight
(lb)
800 A
Manual
Electrical
71
80
1600 A or 2000
A
Manual
Electrical
79
88
2500 A
Front Connect
Manual
Electrical
178
187
2500 A
Back Connect
Manual
Electrical
167
176
3000 A
Front Connect
Manual
Electrical
179
188
3000 A
Back Connect
Manual
Electrical
216
225
4000 A
Manual
Electrical
320
329
Table 1. Weights of the various switch frame sizes, with and
without a motor operator.
Storage
The switch 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.
Switches for outdoor equipment should be stored in that
equipment only when power is available and heaters are in
operation, to prevent condensation.
The switch should be stored in a clean location, free from
corrosive gases or fumes. In particular, protect the switch
from moisture and cement dust, as that combination may
be corrosive.
If the switch is stored for any length of time, it should be
inspected periodically to ensure good mechanical
condition.
1-3 Preparation for 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 the connecting bus. 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 specifications in Table 2.
Bus Connection
Switch Frame Bolt Diam. Torque
(in-lb)
800A (1) 1 / 2 in. 300
1600-2000A (2) 1 / 2 in. 300
2500 A (4) 3 / 8 in. 225
3000 A (4) 3 / 8 in. 225
4000 A (6) 1 / 2 in. 300
Table 2. Bolt sizes and mounting torques for bus connections.
Panel Cutouts and Clearances
Use the following information to prepare the equipment
and assure proper clearances for installation and
operation of the switch.
Figures 1 and 2 show the front-panel escutcheon cutout
patterns and the locations of the switch mounting bolts.
The standard door cutout dimensions require a trim plate
on the switch. The optional dimensions are for flush front
or nonhinged door construction and the trim plate may
be omitted. Ventilation cutouts are required for stationary-
mounted switches rated 1600 A and larger and for draw-
out switches rated 2000 A and larger. Ventilation cutouts
are not required for draw-out-mounted 800 A or 1600 A
frame switches or for stationary-mounted 800 A frame
switches.
Because of arc chamber venting, the minimum through-
air distance from the top of the switch’s molded case to
grounded metal for 800–2000 A switches is 4.50 inches
[114 mm] in an area 5.31 inches x 16.00 inches [135 mm x
406 mm], centered over the vent screens. (Refer to outline
drawings 10054370, Sheets 1–5, for details.)
For 2500–4000 A switches, the minimum through-air
distance from the top of the switch’s molded case to
grounded metal is 8.00 inches [203 mm] in an area 9.00
inches x 16.00 inches [227 mm x 406 mm], over the vent
screens. (Refer to outline drawings 10055629, Sheets 1–7,
for details.)