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Chapter 6: GP
Table 11. GP dimensions
Output
Voltages
FLA
hp
4160
13–124
100–1000
The Eaton SC9000 GP comes in one shipping section but
with different weights depending on horsepower and other
customer options. These weights are approximate. Refer to
the job-specific drawings for the accurate weight.
Table 12. GP Shipping weights
hp
100
150
200
250
300
350
400
450
500
600
700
800
900
1000
Connections
With the Eaton SC9000 GP, installation and connections
remain consistent with the entire SC9000 lineup. The GP has
options for top and bottom incoming and load entry.
Drive discharge and grounding
Compared to the original SC9000, the GP rectifier and
inverter neutral point is at floating potential and extra caution
is required when grounding out the DC bus. Before entering
the SC9000 GP compartments, remove the 4160 V source.
Turn off the "PreCharge" input to the drive. Once 4160 is
removed, wait at least 5 minutes and verify with the SPX
controller keypad that the DC voltage is below 50 Vdc.
Remove all 120 V sources from the drive. Lock out all
power sources connected to the drive.
In units with the optional Kirk key interlocks, the proper key
sequence must be executed to open the inverter and landing
cabinets. After disengaging Kirk key interlocks, remove
fastening bolts from the top medium voltage inverter cabinet
door. First ground the floating neutral terminal (center), and
then ground the negative and positive terminals. Attach a
ground cable to all three inverter terminals to maintain the
grounded state during maintenance or storage.
26
SC9000 EP medium voltage drives IB020001EN—February 2016 www.eaton.com
Width
Height
Depth
72
92
50
Weight
5775
5875
5975
6075
6175
6275
6375
6575
6575
6575
7175
7525
7975
8325
Inverter grounding and replacement
The SC9000 GP utilizes a removable air cooled inverter. The
inverter is a drawout truck-mounted device that can be
withdrawn from the structure for repair or replacement. The
GP inverter uses simple cable connections instead of stab
engagements. After discharging and grounding the DC bus,
remove the fastening bolts from the lower MV inverter
cabinet door. Compared to the SC9000 EP that uses rear
stabs, the GP inverter uses cable connections.
Precautions
The GP includes static sensitive components. Use a
grounded wrist or heel strap when handling or touching the
DMCR or inverter and their components. This reduces the
chance of ESD damage.
Use caution to prevent pinched fingers; inverters can weigh
up to 2000 lb (910 kg).
There is a hazard of electric shock whenever working on or
near electrical equipment. Turn off all power supplying the
equipment before starting work. Lock out the disconnecting
means in accordance with NFPA 70E, "Electrical Safety
Requirements for Employee Safety In the Workplace."
Discharge rectifier, inverter, and DC bus with grounding
stick. Where it is not feasible to de-energize the system, take
the following precautions:
1.
Instruct persons working near exposed parts that are or
may be energized to use practices (including appropriate
apparel, equipment, and tools) in accordance with
NFPA 70E.
2.
Require persons working on exposed parts that are or
may be energized to be qualified persons who have
been trained to work on energized circuits.
For the purpose of these instructions, a qualified person is
one who is familiar with the installation, construction, or
operation of the equipment and the hazards involved. In
addition, this person should have the following qualifications:
1.
Be trained and authorized to energize, de-energize, clear,
ground, and tag circuits and equipment in accordance
with established safety practices.
2.
Be trained in the proper care and use of protective
equipment such as rubber gloves, hard hats, safety
glasses or face shields, flash clothing, etc., in
accordance with established practices.
3.
Be trained in rendering first aid.
4.
Be knowledgeable with respect to electrical installation
codes and standards, for example, the National Electrical
Code (NEC).
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