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EC Series 303

3Ø-3Ø 5KVA-100KVA

EC Series 303

EC 303 series is a double conversion three phase input-three phase output industrial grade Online UPS with regenerative loasd handling.

  • 100% indegenous - designed in our end-end full fledged in-house R&D.
  • Export compliant
  • Available for OEMs
  • 4-quadrant, regenerative load handlingut
  • SNMP for remote power management
  • DSP technology
  • Power-conditioning topology
  • Event logging
  • Hot standby redundancy
  • Auto bypass - Mains synchronised zero transfer time



  • EC 303 is a double conversion Online UPS for industrial application with regenerative load bank. Designed for harsh electrical and environmental conditions this model is a long life design;. offers superior levels of protection against all the input power-related problems and provides regenerated, clean, network grade, high quality power to the connected loads.
  • Industrial design - Designed to handle high inrush current and the transformer is designed to handle the load harmonic current which heats up the inverter transformer.
  • The UPS is utility friendly and generator compatible and prevents the overrating of electrical wires, reduce reflected harmonies back to the source. 


When rotating element of a motor runs faster than its voltage drive control (command), then the motor begins to act as generator and energy pumps back to the source. The conventional Online UPS cannot absorb this energy and the DC bus voltage starts increasing and leads to failure of DC capacitor and switching device. 

The re-generative braking energy is produced in the following conditions,
Quickly decelerating a high inertia (mechanical arm, flywheel).
Controlling the speed of a load moving vertically downwards (Milling, cutting, declining conveyor)
Sudden drop in load torque. (Drilling operation, industrial saw)
Repetitive acceleration and deceleration to a stop.


  • CNC
  • CT & MRI scanners
  • Offset & digital printers
  • Process automation
  • Vertical milling machines
  • Multiplex and cinema halls
  • Pharma processing
  • Research labs
  • Laser cutting machines
  • Automated manufacturing


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