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01.4IB.46300
Equipment Description
c. ratings
Refer to the specific job drawings for the detail ratings applicable to a particular controller. The basic
ratings equal or exceed NEMA STD ICS 3, and are summarized in Table A, Horsepower, Current, and
Voltage Ratings and Table B, Voltage and Interrupting Ratings of Class E2 Medium Voltage Controllers.
Table A Horsepower, Current, and Voltage Ratings
Continuos
Current
(Amperes)
2200-2400V 4000-5000V 6600-7200V
Induction
SYNC
Induction
SYNC
Induction
SYNC
0.8 1.0 0.8 1.0 0.8 1.0
360 1350 1350 1750 2500 2500 3000 4000 4000 5000
720 2500 2500 3500 4500 4500 6000 7000 7000 9500
Table B Voltage and Interrupting Ratings of Class E2 Medium Voltage Controllers
Rated Insulation Voltage Class E2-AR® Interrupting Rating (Fused)
Maximum Volts, rms Amperes (rms) Symmetrical
2500 50000
5000 50000
7200 50000
Note: For additional vacuum contactor ratings information refer to Eaton Technical Data
TD02003001E.
F. MeDiuM voltage contactors
Two types of medium voltage vacuum
contactors employed in FlexTrol™ are the Eaton
Type SL 400A (Figure 4) and the Eaton Type SL
800A (Figure 5). Each vacuum contactor has a
feature that is designed to close and interrupt
the AC power circuit under normal conditions
or to interrupt the circuit under overload
emergency conditions. Another feature of
each design is short circuit protection. This
includes current limiting fuses as specified for
the application.
D. Basic iMpulse level
The basic impulse level test voltage for motor
control centers rated up to 7.2kV is 45kV. An
optional 60kV voltage level is available with the
addition of a single surge arrestor on each pole
of the main bus per line-up.
e. FielD Dielectric test
Field Power Frequency Withstand tests are 75%
of (UL 347) requirement of 18.2kV for 7.2kV
equipment. The recommended test voltage is
13.7kV ac rms.
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