12
7.1
INPUT VOLTAGE RATINGS
SF100 Series drives are rated for 120/208/240 Vac, single phase, 50-60 Hz input. The drive will
function with input voltage of 120 Vac (+10%, -15%), at 48 to 60 Hz, or with input voltage of 208 to
240 Vac (+ 10%, - 15%), at 48 to 62 Hz.
SF200 Series drives are rated for 208/240 Vac, three phase, 50-60 Hz input. The drive will function
with input voltages of 208 to 240 Vac (+ 10%, - 15%), at 48 to 62 Hz.
SF200Y Series drives are rated for 208/240 Vac, single or three phase, 50-60 Hz input. The drive
will function with input voltage of 208 to 240 Vac (+10%, -15%), at 48 to 62 Hz.
SF400 Series drives are rated for 400/480 Vac three phase, 50-60 Hz input. The drive will function
with input voltages of 400 to 480 Vac (+ 10%, - 15%), at 48 to 62 Hz.
SF500 Series drives are rated for 480/590 Vac, three phase, 50-60 Hz input, and will function with
input voltages of 480 to 590 Vac (+ 10%, - 15%), at 48 to 62 Hz.
NOTE: Parameter 01 - LINE VOLTAGE SELECTION must be programmed according to the applied
input voltage. See Section 15.0 - DESCRIPTION OF PARAMETERS.
7.2
INPUT FUSING AND DISCONNECT REQUIREMENTS
A circuit breaker or a disconnect switch with fuses must be provided in accordance with the National
Electric Code (NEC) and all local codes.
The SCF drive is capable of withstanding up to 150% current overload for 60 seconds. Select a fuse
or magnetic trip circuit breaker rated at 1.5 times the input current rating of the drive (the minimum
size should be 10 amps, regardless of input current rating). Refer to Section 5.0 - SCF RATINGS.
Minimum voltage rating of the protection device should be 250 Vac for 120/208/240 Vac and 208/
240 Vac rated drives, and 600 Vac for 400/480 Vac and 480/590 Vac drives.
UL Class CC fast-acting, current limiting type fuses should be used when input fusing is required.
Select fuses with low I
2
T values, rated at 200,000 AIC. Recommended fuses are Bussman KTK-R.
Similar fuses with equivalent ratings by other manufacturers may also be acceptable.
