Chapter 5: ARC
SC9000 EP medium voltage drives
IB020001EN—February 2016
www.eaton.com
23
Chapter 5: ARC
Purpose
This chapter explains the differences between the SC9000
EP and the SC9000 EP AR. It does not cover all possible
contingencies, variations, and details that may arise during
installation, operation, and maintenance of this equipment.
Due to similarities in ducting and construction, refer to
IB48077E and IB48076 for ducting installation instruction.
Introduction
The Eaton SC9000 EP AR provides adjustable frequency
control and protection of medium voltage AC motors and
equipment rated at 2400 V and 4160 V while incorporating
Eaton arc resistant technology. The SC9000 EP AR meets or
exceeds UL 347A and UL 50E as they apply to metal-enclosed
medium voltage industrial equipment and ANSI/IEEE
C37.20.7 for arc resistant type 2B and CSA C22.2 NO.
0.22-11. The SC9000 EP AR is available in three frame sizes:
C, D, and E dependent on horsepower and voltage. The
SC9000 AR is a stand-alone unit and is comprised of a
60-inch input section, followed by the transformer section
and the inverter section. The contactor, softmag pre-charge,
and blower CPTs are located in the input section to ensure
consistency between frame sizes.
All frame sizes in the ARC lineup have undergone changes in
order to meet arc standards.
●
Reinforced cabinet construction providing robust
resistance to arc flash events
●
LV compartment design allowing for 2B rating
●
Air flow channels employing debris and flame blocking
means
●
Internal cabinet design features to control arc propagation
Table 7. SC9000 EP AR dimensions
Notes
1
Allow 16 inches of clearance above unit.
2
226-inch width is dual inverter.
Motor
Cabinet size (inches)
1
Output
voltages
FLA
hp
Width
Height (incl. plenum)
Depth
Frame C
2400
38–390
300–1750
165
128
50
4160
38–390
300–2500
165
128
50
Frame D
2400
448–561
2000–2500
176
128
50
4160
390–434
2750–3500
176
128
50
4160
403–558
3750–4500
226
128
50
Frame E
4160
589–754
4750–6000
226
2
128
N/A