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RECEIVING, UNLOADING
AND UNPACKING
Air break contactors are shipped completely assembled.
To unpack, remove the cardboard shipping carton, then
remove the screws holding the contactor to the wooden
platform and lift the contactor from the platform. Refer to
Figure 2 for recommended lifting method.
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SUHIi
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2O"APPRQI(.
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Fig. 2 - Recommended Lifting Method
NOTE: If any signs of damage are apparent, file a claim
immediately with the transportation company and notify
your Siemens-Allis Sales Office. As much identification as
possible should accompany the claim with a description of
the damage.
STORING
If the contactor can be set up immediately in its perma-
nent location, it is advisable to do so, even though it may
not be placed in operation for some time, Contactor should
be
stored indoors in a clean dry dust~free heated area where
condensation cannot OCCur.
INSTALLATION
GENERAL
Installation shall be in accordance with the National
Electrical Code, ANSI, and NFPA 70 Standards.
• •
MOUNTING
The contactor should be installed in a clean dry heated
place with good ventilation. It should be readily accessible
for cleaning and inspection and should be carefully set up
and leveled on its supporting foundation and secured in
place.
All adjustments have been made at the factory before
shipping and generally no change is required. See that all
contact surfaces are clean and smooth, and that current.
carrying parts are not damaged,
ELECTRICAL CONNECTIONS
Inspect all insulated wiring to see that no damage has
resulted from installing the contactor. Test the high volt-
age wiring for possible grounds or short circuits.
WARNING: Dielectric testing is hazardous, and should be
conducted only by trained personnel. Refer to test device
instructions for safety precautions.
A high potential test at 2% times the nominal system
voltage plus 2000 volts applied for one minute between
phases and from all phases to ground is the preferred
method. Be sure to disconnect any devices (control power
transformer, etc.) from the circuit which could be dam-
aged by the test voltage. If a hi-pot tester is unavailable,
then a Megger test at 1000 volts is a suitable second
choice.
-
Make sure that all current-carrying parts outside the
contactor have adequate current-carrying capacity and
are correctly insulated in accordance with the require-
ments of the National Electrical Code (NEC)' All electri-
cal connections should be made carefully per furnished
wiring diagram. Tighten all lugs to recommended torque
values. If crimp lugs are supplied, use recommended tools
only. IMPORTANT: To obtain correct magnetic action from
blowouts, connect the load wires (motor
I
furnace, etc.) to
the terminals on the rear of the blow-out coils. (Refer to
Figure 3.).
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Fig. 3 - Location of Line and Load Terminals
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