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FR-A842-P Overview (Parallel)

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FR-A842-P Parallel Drives for Large Capacity Motors

Using all new technology to seamlessly synchronize two or three sets of inverter sections, the FR-A842-P parallel configuration is a unique solution for controlling large capacity motors up to 1800 horsepower. The FR-A842-P inverter sections are fed by converters in a common DC bus configuration (FR-CC2-P) and utilize balance reactors (FR-POL-H) to slow the rate of current rise on the output side of the drives. Ideal for large pumping systems and artificial lift applications, the FR-A842-P parallel configuration can offer high levels of motor control and performance while being a cost effective alternative to many medium voltage systems.

FR-A842-P VFD

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Key Benefits

  • Optimum excitation control for reducing energy consumption
  • Increased motor capacity range (up to 1350kW)
  • V/Hz, and vector motor control
  • Speed, torque or position control
  • Operation of two or three inverters in parallel
  • Motor load characteristics function
  • Multiple communications options (RS-485 used for master/slave communications)
  • Built-in EMC filter
  • Protective functions including overcurrent trip during acceleration, constant speed and deceleration
  • Warning functions for stall prevention, speed limit indication and other various alarms

 Wastewater Pumping

Intelligent Energy Optimization

As a result of the enhanced optimum excitation control in Mitsubishi Electric variable frequency drives, over current is no longer generated during steep acceleration/deceleration even without limiting the amount of voltage compensation during these operations which ultimately provides improved energy savings.

OptimumExcitation

Specifications & Configuration

In parallel configurations, the capacity of the drives must be the same series in the system. Drive capacities cannot be mixed.

FR-A842-P (2-inverters in a parallel system configuration example)
FRA842P 2INVERTERS IN PARALLEL

FR-A842-P (3-inverters in a parallel system configuration example)
FRA842P 3INVERTERS IN PARALLEL

The rated specifications for operating two or three inverters in parallel
A842 Table1  


Converter Unit Capacity

The capacity of all converter units must be the same series in the system. Converter unit capacities cannot be mixed. The table below shows the converter units compatible with the inverters according to the connected motor capacity.

A842 Table2

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