GE Industrial Solutions AKD-20 Low Voltage Switchgear - Manuel (Page 39)

AKD-20 Low Voltage Switchgear
Chapter 4. Equipment Installation
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Fig. 4-18. Cross-section view of assembled roof joint
5. TIE HOUSING BASES TOGETHER - Referring to Fig. 4-17, tie the
bases of the outdoor housing together using the splice plate
(2) supplied with the equipment and the bolts which previously
secured the lifting plates (1) removed after emplacement of
the equipment. The nuts are welded to the rear surface of the
base. The bolts should be tightened with a torque of 45 ft-lbs.
NOTE: There are two splice plates required, front and rear of the
assembly.
NOTE: Deux plaques à épissures sont nécessaires à l’avant et à
l’arrière de l’assemblage
6. INSTALL THE ROOFCAP - The roofcap (7), Fig. 4-17, should be
installed over the sealed and fastened roof flange assembly
(5). The roofcap is secured in place with two 1/4-20 NC x 1/2-
inch thread forming bolts, each at the front and the rear ends
of the roof cap. These bolts should be tightened with a torque
of 7-9 ft-lbs.
7. CONNECT TRANSFORMER FLANGE - If a transformer is
included in the equipment line-up, the flange should be
connected to the switchgear opening using the gasket and
fastening material supplied with the switchgear equipment.
8. JOIN SECTIONS TOGETHER - The switchgear equipment within
the outdoor enclosure should be joined to its mating sections
in the manner described for indoor equipment in Chapter 4,
Step 3, Page 33.
9. MAKE ELECTRICAL INTERCONNECTIONS - The installation of
bus splice plates for the main horizontal, neutral and ground
buses should be done in accordance with the instructions for
indoor equipment, Chapter 4, Step 4, Page 34.
10. CONNECT THE TRANSFORMER SECONDARY-The installation
of the transformer connection straps to the incoming bus
should be done in accordance with the instructions for
indoor equipment, Chapter 4, Step 5, Page 37.
11. INTERCONNECT CONTROL WIRING-The interconnection of
control wiring across shipping splits should be done in
accordance with the instructions for indoor equipment,
Chapter 4, Step 6, Page 37.
Fig. 4-19. Door seals
12. SEAL SMALL OPENINGS - After completion of the shipping split
assembly, any small openings should be sealed with GE
Clear Silicone Caulking Cement.
Anchoring Switchgear Equipment
Correct anchoring of the switchgear equipment to the foundation is
very important. After completion of re-assembly of the equipment
at the shipping splits, the equipment anchoring procedure should
be completed.