GE Industrial Solutions AKD-20 Low Voltage Switchgear - Manuel (Page 42)

AKD-20 Low Voltage Switchgear
Chapter 4. Equipment Installation
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Outdoor Equipment
Outdoor equipment are anchored after re-assembly of the
separately shipped sections. The four anchor bolts should be
tightened with a torque of 45-55 ft-lbs.
CAUTION: If the equipment is to be subjected to operational or
environmental (seismic) shock loading, the factory must be
consulted for anchoring recommendations.
ATTENTION: Si l’équipement doit être assujetti à une charge de
choc opérationnelle ou environnementale (sismique), il faut
consulter le manufacturier afin d’obtenir des recommandations
d’ancrage.
Busway Connections
Busway runs must be aligned with openings in the equipment and
connected to the mating components electrically and mechanically.
A collar is mounted on the top of the equipment cable compartment
to which is bolted the busway housing. See Fig. 4-22. The 1/4-20
NC bolts, washers, and nuts for this mechanical connection are
supplied with the busway stub. The bolts should be tightened with
a torque of 7-9 ft-lbs.
Fig. 4-22. Spectra Series™ Busway mounting (front-entry)
The power conductors in the busway stub are designed to bolt
directly to power connector blocks mounted on the switchgear riser
bus bars. These connections are made with 1/2-13 NC bolts
supplied with the switchgear equipment.
NOTE: To maintain the minimum contact resistance across
bolted bus joints, it is recommended that the joint contact
surfaces be coated with a film of GE lubricating grease D6A15A2.
A can of this grease is supplied with the equipment. Do not put
grease on the bolt threads as this will affect the clamping force
exerted by the bolt.
NOTE: Afin de maintenir une résistance de contact minimale à
travers les joints vissés des barres omnibus, nous
recommandons que les surfaces du joint de contact soient
unduites d’une pellicule de graisse lubrifiante GE D6A15A2.
L’équipement est fourni avec une boîte de cette graisse. Il ne faut
pas graisser les fils des boulons car la force de serrage exercée
par le boulon en sera affectée.
The recommended torque for tightening the 1/2-13 NC bolts
connecting the busway stub connections to the riser bus power
connectors is 35-40 ft-lbs.
Control Wire Connections
For external control wiring, refer to Fig. 4-23 for switchgear cable
area dimensions, and connect the control wires to the switchgear
section as follows:
1. When control conduits enter the switchgear from below, they
should not extend more than one inch above the floor. The
control wires may be pulled through the conduits before or
after the switchgear is installed.
2. Route the control wires from the conduits through the wiring
trough (cross-hatched area- 2" x 7"-shown on Fig. 4-23) at the
side of the cable compartment. Connect the cables to the
terminal blocks in accordance with the connection diagrams
for the equipment.
3. If the control conduits enter from above, drill the top cover
within the available space indicated. See Fig. 4-23. Control
wires should be routed to the wiring trough and connected to
the terminal blocks as described previously.
Fig. 4-23. Floor plan and cable entry space - indoor AKD-20