Cutler-Hammer ATVISPE31000XSU, Instructions Manual

Page: 15 / 44

I.B. ATS-SD02
Page 9
Effective 5/98
3.2.4 TRANSFER MECHANISM
The transfer switch uses Cutler-Hammer SPB-type insu-
lated case circuit breakers and insulated case switches
with a stored-energy mechanism (Figure 3-2). An elec-
trical operator automatically recharges the mechanism
after the switching device has been closed, and an indi-
cator on the switch shows whether it is in the OPEN or
CLOSED position and the status of the stored energy
mechanism.
The switching device is closed by energizing a solenoid
that releases the spring mechanism. A shunt trip will
open the switching device if energized.
3.2.5. DRAWOUT MECHANISM
The drawout mechanism is described in detail in Section
6 (Figure 3-4).
3.3 VOLTAGE SELECTION PANEL
The voltage selection panel is a multi-tap-enclosed
transformer mounted in the enclosure (Figure 3-5).
Seven front-accessible voltage taps from 208 to 600
volts AC satisfy most required application voltages. A
quick change capability from one voltage to another is
provided by a small disconnect plug.
Figure 3-5 Voltage Selection Panel
Figure 3-4 Drawout Mechanism