Product detail

avc dvr
Dynamic voltage restorer


Dynamic voltage restorer

ZGR AVC DVR is an innovative system of compensation of voltage sags for the continuity of industrial processes

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ZGR AVC DVR is an innovating system designed
to mitigate and eliminate the effect of electrical
disturbances on critical industrial processes through the elimination of sags and a continuous regulation for minor disturbances. ZGR AVC DVR guarantees the quality of the grid meeting the demands of industrial production processes while keeping stable and constant the output voltage regardless of energy grid voltage variations. It consists of a transformer, a bidirectional rectifier unit, plus an inverter. The aim of the ZGR AVC DVR is to compensate disturbances, unbalanced
voltages, and to regulate them in case of possible
fluctuations and overvoltages. Moreover, ZGR AVC DVR monitors, controls and records events that occur in the system, allowing subsequent viewing through the touch control panel.


  • Mitigates three-phase voltage sags up to 70% of depth or single-phase interruptions
  • Continuous regulation to offer high stabilization (± 1 %)
  • High efficiency supply system > 98 %
  • Not battery required or other energy storage components
  • Compensation of voltage sags even for long times (up to 30 sec)
  • Swell and overvoltage compensation
  • Independent compensation per phase
  • Compensation of balanced and unbalanced voltage drops
  • Automatic bypass
  • Withstand 150% overload for 1 second in normal mode
  • Less than 3 milliseconds response-time
  • Energy flow in both directions
  • Quick response speed
  • Touch control panel
  • Customizable for other powers powers, sags and/or voltage
  • Modular design which facilitates O&M
  • Easy for connecting in parallel up to 3 equipments
  • Mitigates voltage sags according the standards: SEMI F47, IEC 61000-4-11 and IEC 61000-4-34 (depends on the model)


Model 40% sag models 50% sag models 60% sag models
Nominal voltage 200/208/220 ó 380/400/415 ó 480 Vac
Voltage range (Vac) ± 20% + 20% - 25% + 20% - 30%
Phase 3 phases + ground (neutral opcional)
Frecuency 50/60Hz ± 10%
Frequency variation (df/dt) 4 Hz
Voltage 200/208/220 ó 380/400/415 ó 480 Vac
Power range 150 - 900 kVA/kW 220 - 660 kVA/kW 150 - 450 kVA/kW
Regulation ± 1%
Phase 3 phases + ground (neutral opcional)
Frecuency 50 / 60Hz
Response time < 3ms
Transfer time to Bypass < 0,5ms
Overcharge capacitity in normal mode 110% - 30s, 150% - 1s
Overcharge capacitity in bypass mode 200% - 60 s, 500% - 10 s, 3000% - 0,2 s
Maximum efficiency > 98%
Dielectric rigidity 2.5 kV – 1 minute
Control panel Touch panel
Protections Short circuits, current limitation, overload, RFI filter, necessary disconnections
Paralellable Up to 3 equipments (Master + 2 slaves)
Maintenance switch Yes (in slave equipments). Optional (in master equipments)
Protection degree IP 20
Protective class Class I
Pollution degree rating 2
Overvoltage category III
Vibration Class 3M1
IK impact degree IK07
Cooling Forced ventilation
Working temperature 0 ~ 40 ºC
Storage temperature 0 ~ 85 ºC
Noise level < 65 dB
Altitude < 1000 m
Relative humidity 0 ~ 95%, without condensation
Marks CE
General directives IEC 62477-1, IEC 61000-6-2, IEC 61000-6-4, IEC 60721-3-3


Hybrid, robust and reliable solutions


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