IB01602007E
For more information visit: www.cutler-hammer.eaton.com
Instruction Bulletin
Effective: June 2003
Page
9
O&M Manual for
Non-Automatic Transfer
Switches (30 – 1200 Amperes)
Section 3: Equipment Description
3.1 General
Cutler-Hammer transfer switch equipment is available in
four different configurations:
■
Automatic Transfer Switch
■
Basic Transfer Switch
■
Non-Automatic Transfer Switch (Manually Operated)
■
Non-Automatic Transfer Switch (Electrically Operated)
Refer to Section 1 for a discussion of the four types. Each
transfer switch is usually supplied in an enclosure, although
unmounted sub-assemblies can be supplied for mounting
by the customer. Since the enclosed automatic transfer
switch encompasses all transfer switch equipment
possibilities, it is the only specific type that will be
discussed in this section.
Figure 6. Typical Vertical Design Power Panel (Unmounted)
The enclosed automatic transfer switch consists of three
basic panels interconnected through connector plugs and
mounted in an enclosure (Figures 4, 5, 15 and 16):
■
Power Panel
■
Voltage Selection Panel
■
Logic Panel
The components comprising the three panels are installed in
accordance with the specific requirements of the circuit
being controlled. Each transfer switch is, therefore, tailor-
made to a specific application.
3.2 Power Panel
The power panel consists of a means for making load,
power and neutral connections, the main contacts and the
transfer mechanism all on one steel base plate (Figures 6
and 7).
Figure 7. Typical Horizontal Design Power Panel (Mounted)