GE Industrial Solutions H2007001 G21 Series - Manual (Page 30)

Infinity D Power System Installation Guide: -48V Plants H2007001
Issue 2.0, June 3, 2009 30
If you have one AC circuit breaker for each pair of rectifiers, start here.
Step Action
1.
Loosen the screws that secure the AC
wiring cover.
2. Remove the AC wiring cover.
3.
Remove the conduit knockout.
4.
At the AC service panel install a 40A double pole circuit breaker for each pair of rectifiers. Use 8
AWG wire.
5.
Route two 8 AWG wires for each pair of active rectifier positions through 1 inch conduit and
fitting, and one 8AWG ground (PE), into the AC wiring compartment.
6. Terminate the PE (ground) wire to the
chassis using a double hole lug (on 5/8 inch
centers) with a UL accepted crimp and tool.
7. Torque ground lug nuts to 65 inch·lbs or 7N·m using a 7/16 inch socket wrench.
8. Break out the plastic dividers in 4 places as
indicated in the diagram.
R1
L1 R2
L1 R3
L1 R4
L1
R1
L2 R2
L2 R3
L2 R4
L2
4 Locations where dividers are removed
Loosen
Screws
Terminate
Ground Wire
Illustration of
wiring flow
through conduit
hole