8.
LEFT SIDE PANEL (FIG 10 AND 11).
a. The high voltage compartment is behind the left side panel. When the
panel is opened a push-contact, release breaker, interlock switch automatically
cuts off power to the test stand. There are, however, dangerous electrical
potentials in the high voltage compartment. Turn OFF the main breaker switch when
the compartment door is open.
Figure 10.
High voltage compartment.
b. The main breaker switch extends through the high voltage compartment
door.
This two-position switch is the master control for the test stand.
c. Protection for the blower motor is provided by two in-line 10A, 250-volt
fuses. These fuses are located in fuse holders in the high voltage compartment.
d. The varidrive reversing switch is used to reverse the direction of
varidrive rotation. It is a two-blade knife switch. The main breaker switch
should be turned OFF when changing the varidrive reversing switch.
e. The test stand is wired for 220-volt operation when shipped from the
factory. Overload relay heater elements W-158 are installed for 220-volt
operation. If the test stand is rewired for 440-volt operation, W-151 elements
must be installed. The overload relay heaters provide thermal overload protection
for the test stand.
OS 010, 3-P13
Previous Page
