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Delta medium voltage drive is a high-efficiency, compact, high reliable and energy-saving solution. According to demand of different motors and loads, Delta provides general type and vector control type MVDs, which have a broad range of applications in segments such as power generation, oil & gas, mining, metals, cement, and public facilities. MVD is used to drive medium voltage motors loaded for instance by fans, pumps, compressors, mills, crushers, mixers, and extruders. MVD provides process control, so it can increase production efficiency, reduce energy loss, improve equipment protection, and reduce maintenance cost.
Delta provides customers complete solutions with easily operated variable frequency drives.
Leading Technology
- Advanced control functions enhance adaptability against instable grid
- Multi-pulse input rectification reduces input current harmonic distortion, meeting IEEE 519-1992
- Advanced drive concept provides multilevel output voltages and enhanced motor operation
Protection Features
- Over current
- Over load
- Transformer over temperature
- MVD over temperature
- Under voltage / over voltage
- Motor overload (external)
- Blower fault
- High voltage cabinet door open
- Cabinet air pressure abnormal
- Output short circuit
- Input / output phase loss
- Communication fault
- Output fault to ground
Enhanced Process & Quality Control
- Built-in proportional integral differential (PID) controller enhances control of process variables such as flow and pressure
- Ride through and flying start features ensure a more continuous process in spite of input voltage dips
- Friendly user interface provideeasy-to-use system integration
Control & Monitoring Features
- Frequency reference (Hz)
- Actual frequency (Hz)
- Input / output power / current / voltage
- Cumulative operating hours
- Drive status
- Status of system bypass switches and MCB
- Analog inputs / outputs monitoring
- Fault / Alert messages
- Fault diagnosis function
- Ride-through and flying start functions
Lower cost of ownership
- System efficiency is more than 98.5% (without phase-shifted transformer)
- Optimized pump and fan operation ensure significant energy savings and short return on investment
- Integrated transformer enables a three-cable-in-three-cableout installation concept using considerably less engineering effort
- Reduced mechanical stresses eliminate hammer effect in pipelines and vent ducts, and lowers maintenance cost
- Multilevel voltages and motor soft start minimize stresses
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