Medium Voltage VFD LSMV-M1000 series


[High Reliability & Performance / Compact / Energy Saving] LSIS medium voltage drive consists of compact integrated systems built on cutting-edge technologies, delivering optimum energy-saving solution featuring high efficiency and power factor. The system supports a user-friendly HMI(Human Machine Interface) that allows easy operation and displays desired information for customers maximum convenience. LSIS medium voltage drive offers leading industrial drive solutions with proven reliability and economic viability. It also contributes to energy saving and environment protection in various industries including gas, water treatment, marine, power generation, and cement.

Series overview

MV Drive Series LSMV-M1000 LSMV-M1000A
Voltage 3kV/4kV/6kV/10kV/11kV 3kV/6kV
Capacity 200kVA~12,500kVA 200kVA~1,200kVA
Control Mode V/F, Sensorless Vector
IP Class Standard IP21 (~IP42 Optional)
Standards CE, UL(Pending)
Frequency 50/60Hz


Improved Power Quality

Improved Input Power Quality and THD (Total Harmonic Distortion) by Adopting Multi-winding Phase-shift Transformer

  • Application of extended delta-type transformer and separated-type multi-pulse rectifier
    drastically reduces input power THD, hence complying with IEEE-519 standard.
  • Input current almost identical to sine waves eliminates need for additional harmonic filters or
    active filters on the input side.

Producing Multilevel PWM-type Sinusoidal Output

  • Compatible with conventional motors and cables to ensure it fits in with existing system design.
  • Minimal impact of voltage reflection, allowing longer cable length between drive and motor
  • Medium voltage drives minimize mechanical stress on motor, eliminating need for additional
    sine wave filters.

Energy Saving

Achieving Energy Saving and Minimum Energy Loss through Optimized Speed Control


Guaranteeing High Operating Efficiency and Power Factor

  • Delivering a high power factor at 95% or above with an independent built-in system without
    additional power factor corrector.
  • Improving system efficiency with a drive-only system configuration without input/output filters.

Compact Design


Cell Bypass Function

Automatically bypass of failed cells if cells connected in series randomly fail during operation,
allowing continuous operation.


Flying Start

Automatically estimates speed of the rotating motor to reach the frequency without any system failure(trip)


Ride-through Capability

Mechanical energy of load is regenerated to continue operation for up to 5 cycles when power outage occurs.
It allows continuous operation without stopping the drive or system.


Synchronous Transfer Function

Switching motor power from medium voltage drive to commercial power (bypass mode) or vice versa (drive mode)



User Convenience

Standard HD HMI Monitoring Maximizes User Convenience



  • Standard built-in PLC supports customization (I/O extensibility, etc.)
  • Providing the improved system compatibility with field-bus communication options
    (Profibus, DeviceNet, Modbus, Metasys N2, LS BUS(RS485)