I.B. ATS-CP01
Page 6
Effective 5/98
SECTION 3: EQUIPMENT DESCRIPTION
3.1 GENERAL
This Cutler-Hammer transfer switch equipment is avail-
able in one configuration:
• Automatic Transfer Switch
Refer to Section 1 for a discussion of this type. 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 equip-
ment possibilities, it is the only specific type that will be
discussed in this section.
The enclosed automatic transfer switch consists of three
basic panels interconnected through connector plugs
and mounted in an enclosure:
• Power Panel
• Voltage Selection Panel
• Logic Panel
- IQ Transfer
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 are all on one steel frame
(Figures 3-1).
3.2.1 MAIN CONTACTS
The main contacts connect and disconnect the load to
and from the different power sources. High withstand
insulated case switches (Figure 3-2) are the main con-
tacts for the Normal and Emergency power sources in
standard, unmodified automatic transfer switches.
Optional integral thermal and short circuit protection in
either or both switching devices is available (Figure 3-3
and Section 3.6). These continuous duty devices are
rated for all classes of loads. In addition, they have high
dielectric strength, heavy-duty switching and withstand
capabilities, and high interrupting capacity.
Figure 3-1 Typical Power Panel
Figure 3-2 Insulated Case Switch
