LEESON SM Series Sub-Micro Inverters - Manual (Page 12)

8
7.0 INPUT AC POWER REQUIREMENTS
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.
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.
If the kVA rating of the AC supply transformer is greater than 10 times the input kVA rating of the
drive(s), an isolation transformer or 2-3% input line reactor must be added to the line side of the drive(s).
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’s power components.
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 Series drives rated for 120 Vac, single phase, 50-60 Hz input will function with input voltage of 120
Vac (+10%, -15%), at 48 to 62 Hz.
SM Series drives rated for 208/240 Vac, single phase, 50-60 Hz input will function with input voltage of
208 to 240 Vac (+10%, -15%), at 48 to 62 Hz.
SM Series drives rated for 208/240 Vac, three phase, 50-60 Hz input will function with input voltage of
208 to 240 Vac (+10%, -15%), at 48 to 62 Hz.
SM Series drives rated for 400/480 Vac, three phase, 50-60 Hz input will function with input voltage of
400 to 480 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.
DANGER