IB01602007E
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Instruction Bulletin
Effective: June 2003
Page
23
O&M Manual for
Non-Automatic Transfer
Switches (30 – 1200 Amperes)
5.4 Non-Automatic Operation (Electrically Operated)
A non-automatic (electrically operated) transfer switch
(Section 1.2.1) functions similarly to the non-automatic
(manually operated) transfer switch except for the addition
of an electrical operating feature. This feature permits the
main contacts to be opened or closed electrically. There is,
however, no intelligence circuit associated with this design.
Electrical operation is accomplished by adding a motor and
required circuitry to the manual mechanism and wiring it
to a selector switch on the front of the enclosure (Figure 22).
The switch’s operating position can be visually indicated
on the front of the enclosure by using indicating lights.
Since an intelligence circuit is not part of the design,
operation of the selector switch is required each time an
electrical transfer is required, whether it is from Source 1
to Source 2 or vice versa.
Figure 22. Electrical Operation Pushbutton and Position Indicating
Lights Shown Mounted
