Dynamic Voltage Restorer
RUHSTRAT OLIVER DVR Dynamic Voltage Restorer, mainly composed of an energy storage element, inverter, transfer switch, bypass, etc., connected in series between the power supply and the protected load. Once a deviation from the rated voltage level is detected, the DVR immediately cuts off the input power supply and temporarily provides the load with quality qualified electrical energy.
- Commodity name： Dynamic Voltage Restorer
- Commodity ID： Dynamic Voltage Restorer
Category:
- Product Description
- Summary
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Working Principle
Grid voltage within limit:
When the grid supplies power to the load (online mode), the inverter sleeps but maintains synchronization with the grid voltage to act immediately during grid disturbances.
When voltage sag occurs:
At the moment of grid disturbance, the anti-parallel thyristor quickly turns off, isolating the load from the grid, and the inverter supplies power to the load.
Grid voltage stabilizes again:
OLIVER anti-parallel thyristor conducts, the inverter circuit shuts down, the load is powered by the grid again, and the rectifier circuit recharges the energy storage capacitor.
Fault safe bypass operation:
In case of OLIVER fault or maintenance, the load current will automatically transfer to the fault safe bypass. That is, the current will pass through the contactor or bypass switch of the anti-parallel thyristor to directly supply the load.
Technical Parameters
Serial Number
Project Category
Parameter
Input Characteristics
Grid Voltage Range
AC400V±15%
Rated Power
50/60Hz±10%
Overvoltage Level
III
Output Characteristics
Minimum Residual Voltage (Umin)
0%
Output Wiring Method
Three-phase Four-wire System
Compensation Time
Standard model compensates 0~100% residual voltage to 100%, lasting 3s; other specifications customizable;
Common Capacity
50/75/100/200/300/400/500/800/1200/1500kVA
Switching Voltage Threshold
Continuously adjustable, gradient 0.1V
Voltage Setting Time
1~5ms
Response Time
<1ms
Cooling Method
Air Cooling
Output Frequency
50/60Hz±1%
Overload Capacity
150%——60s
Voltage Distortion (THDu)
Under linear load conditions, THDu < 2.5%
Voltage Unbalance (Negative Sequence/Positive Sequence)
Under 100% unbalanced load < 3%
Protection Current
200%
Noise
< 65dB
Protection Functions
Power-on self-test, power semiconductor device fault protection, DC bus overvoltage, DC bus undervoltage, fan protection, voltage and current transformer disconnection protection, overload protection.
Energy Storage Section
Energy Storage Component
Super Capacitor
Overload Capacity
200%
Display
10-inch Touch Screen
Communication
Modbus/TCP, Ethernet/485
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RUHSTRAT OLIVER DVR Dynamic Voltage Restorer, mainly composed of an energy storage element, inverter, transfer switch, bypass, etc., connected in series between the power supply and the protected load. Once a deviation from the rated voltage level is detected, the DVR immediately cuts off the input power supply and temporarily provides the load with quality qualified electrical energy.
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