LSIS LSLV-G100 - Page 33

5.5–7.5 kW
Power Terminal Labels and Descriptions
Terminal Labels
Name
Description
Ground Terminal
Connect earth grounding.
R(L1)/S(L2)/T(L3)
AC power input terminal
Mains supply AC power connections.
B1/B2
Brake resistor terminals
Brake resistor wiring connection.
U/V/W
Motor output terminals
3-phase induction motor wiring
connections.
Note
• Do not use 3 core cables to connect a remotely located motor with the inverter.
• When operating Brake resistor, the motor may vibrate under the Flux braking
operation. In this case, please turn off the Flux braking (Pr.50).
• Make sure that the total cable length does not exceed 665 ft (202 m). For inverters < =
4.0 kW capacity, ensure that the total cable length does not exceed 165 ft (50 m).
• Long cable runs can cause reduced motor torque in low frequency applications due to
voltage drop. Long cable runs also increase a circuit’s susceptibility to stray
capacitance and may trigger over-current protection devices or result in malfunction of
equipment connected to the inverter. Voltage drop is calculated by using the following
formula:
Voltage Drop (V) = [

 X cable resistance (mΩ/m) X cable length (m) X current (A)] /
1000
• Use cables with the largest possible cross-sectional area to ensure that voltage drop is
minimized over long cable runs. Lowering the carrier frequency and installing a micro
surge filter may also help to reduce voltage drop.
Distance
< 330 ft (50 m)
< 330 ft (100 m)
> 330 ft (100 m)
Allowed Carrier Frequency
< 15 kHz
< 5 kHz
< 2.5 kHz