10
R E LI AG E A R
®
N D A NS I N A R ROW DE S IG N ME TA L- CL A D S WITCHG E A R
—
Indoor installation
Caution:
After completing all
connections to secondary circuits,
follow these circuits and remove
temporary connections from current
transformer secondaries.
Failure to remove the jumpers will
interfere with meters, relays or other
devices in these circuits.
If shorting terminal blocks are used, review the
connection diagram that was shipped with the
unit for position of shorting screws. See step 11
of the control circuit checkout in section 6.2.
Connection to ground bus
The factory bolts the ground bus bars to each
frame. Connect the ground bus bars between
the shipping splits (figure 7) and to the station
ground with a cable or bus of equal or larger
gauge than the housing ground bus.
Do not run cable or bus in conduit. The cable or
bus should take the most direct path to ground.
Installation of bus bar connections between
shipping splits
The factory assembles the main bus bar in each
section. The splices at the shipping splits are
unbolted for shipment. Refer to the general
arrangement drawings.
The contact surfaces of the bus at bolted joints
are plated. Clean contact surfaces with a clean
cloth and an OSHA-approved solvent.
Caution:
Do not use alcohol or freon.
Limit the use of solvents to removing
grease and contamination from
primary conductors, insulation and
unpainted metallic surfaces.
Use an OSHA-approved, non-
flammable solvent with a threshold
limit of 300 PPM or higher in
accordance with local regulations.
Use solvents in well-ventilated areas.
Take care not to remove or tarnish
plating.
Remove barriers to access the main bus
compartment. Bolt the main bus together using
supplied hardware. Conductivity of a bolted joint
depends on the pressure or torque applied. All
bolted joints must be torqued per the values in
appendix A — target torque values.
—
06 CT shorting blocks
—
07 Ground busbar
connections
—
06
—
07
Содержание ReliaGear ND
Страница 2: ......