LEESON SM-Basic Series Sub-Micro Inverters (Obsolete) - Manual (Page 11)

7
WARNING!
Hazard of electrical shock! Capacitors retain charge after power is removed. Disconnect incoming
power and wait until the voltage between terminals B+ and B- is 0 VDC before servicing the drive.
7.0 INPUT AC POWER REQUIREMENTS
The input voltage must match the nameplate voltage rating of the drive. Voltage fluctuation must not
vary by greater than 10% overvoltage or 15% undervoltage.
NOTE: Drives with dual input voltage ratings must be programmed for the proper supply voltage
(refer to Parameter 01 - LINE VOLTAGE SELECTION in Section 15.0 - DESCRIPTION OF
PARAMETERS).
The drive is suitable for use on a circuit capable of delivering not more than 5,000 RMS symmetrical
amperes at the drive’s rated voltage.
Three phase voltage imbalance must be less than 2.0% phase to phase. Excessive phase to phase
imbalance can cause severe damage to the drive.
Motor voltage should match line voltage in normal applications. The drive’s maximum output voltage
will equal the input voltage. Use extreme caution when using a motor with a voltage rating which is
different from the input line voltage.
7.1 INPUT VOLTAGE RATINGS
SM-Basic 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.
SM-Basic Series drives are rated for 208/240 Vac, single phase, 50-60 Hz input. The drive
will function with input voltages of 208 to 240 Vac (+10%, -15%), at 48 to 62 Hz.
SM-Basic 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.
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 SM-Basic 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 fuse size should be 10 amps, regardless of input current rating). Refer to
Section 5.0 - SM-Basic RATINGS.