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
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