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Transient Voltage Intelligent Regulation Device

A Dynamic Voltage Restorer (DVR) is an advanced power‑electronics device. It leverages cutting‑edge power‑electronics semiconductor and control technologies, combining them to ensure reliable power supply for end users. By employing state‑of‑the‑art DSP, FPGA, CPLD, and other control chips, the DVR continuously monitors grid voltage quality in real time. When a voltage sag or surge is detected, the system instantly switches the load’s power supply to an inverter‑based source, thereby safeguarding sensitive equipment from any disruption. The DVR’s switching and shutdown functions are software‑controlled, with a typical response time of less than 1 millisecond, ensuring uninterrupted power delivery.

Category:

Low-Voltage Automatic Filter Compensation Device

Product Manual

Hotline:

18028173868

Product Consultation

Summary
Product Selection
Distinction
Parameter
Explain
Size

Commodity name: Transient Voltage Intelligent Regulation Device

A Dynamic Voltage Restorer (DVR) is an advanced power‑electronics device. It leverages cutting‑edge power‑electronics semiconductor and control technologies, combining them to ensure reliable power supply for end users. By employing state‑of‑the‑art control chips such as DSPs, FPGAs, and CPLDs, the DVR continuously monitors grid voltage quality in real time. When a voltage sag or surge is detected, the system instantly switches the load’s power supply to an inverter‑based source, thereby safeguarding sensitive equipment from any disruption. The DVR’s switching and shutdown operations are governed by software, with typical transition times kept below 1 millisecond to guarantee uninterrupted power delivery.

Product Features:

► High reliability: An integrated design architecture with excellent environmental adaptability, featuring a reduced number of components, robust shock resistance per component, and long service life; the cabinet employs bottom‑inlet, top‑outlet airflow and incorporates an independent cooling air path to effectively prevent dust accumulation inside.

► Short response time: The total response time is less than 1 millisecond, ensuring uninterrupted power supply.

► Strong charging capability: It can charge energy storage devices to full capacity and, following the first deep voltage sag, rapidly recharge discharged energy storage units, effectively addressing the common issue of consecutive voltage sags during thunderstorm conditions.

► High utilization of energy storage components: A wider input DC voltage range offers greater convenience to customers, optimizing initial investment.

► Simple operation and maintenance: Supercapacitors offer long service life, making maintenance even easier; the power section features a modular design.

► Intelligent management of energy storage devices: An intelligent over-capacity management system is employed to detect abnormal conditions in supercapacitors in real time.

Technical Specifications:

Working principle

Series	DVR 50–150 kVA	DVR 200–350 kVA	DVR 400–450 kVA	DVR 500 kVA and above
System Parameters
Rated voltage	208V, 220V, 380V, 400V, 415V, 460V, 480V
Rated capacity	50 kVA, 75 kVA 100 kVA, 150 kVA	200 kVA, 250 kVA 300 kVA, 350 kVA	400 kVA, 450 kVA	500 kVA and above capacity
Rated frequency	50Hz/60Hz, ±5Hz
Voltage range	-40% to +20% (adjustable)
DC operating voltage	180–750 Vdc (the minimum voltage can be adjusted according to customer requirements)
Number of units that can be paralleled	8
Overall machine efficiency	≥99%
Wiring method	Three-phase three-wire; three-phase four-wire
Inbound call method	Upper and lower incoming lines
Airflow method	Air enters from below and exits from above.
Performance Metrics
Total response time	<1ms
Voltage accuracy	1%
Temporary Voltage Sag Compensation Capability	100%, with a compensation time of 3 seconds; longer compensation times can be achieved by adding supercapacitors, as per customer requirements.
Overload capacity	Overload of 125% is permissible for a minimum of 10 minutes; overload of 150% is permissible for a minimum of 1 minute.
Cooling mode	Air-cooled
Noise	<68dB
Fixing method	Cabinet
Size *(WidthDepthHeight mm)*	60010002000	Power cabinet:	Power cabinet:	For capacities exceeding 500 kVA, dimensions are customized to suit the specific rating.
		60010002000	60010002000
		Overcapacity cabinet:	Overcapacity cabinet:
		60010002000	80010002000
Environmental parameters
Altitude	≤2000m, 2000m–4000m derating
Operating temperature	-10℃~40℃
Relative humidity	5%RH–95%RH, non-condensing

Product Selection:

Key words:

Voltage
power supply
equipment
power grid

► High reliability: An integrated design architecture with excellent environmental adaptability, featuring a reduced number of components, robust shock resistance per component, and long service life; the cabinet employs bottom‑inlet, top‑outlet airflow and incorporates an independent cooling air path to effectively prevent dust accumulation inside.
► Short response time: The total response time is less than 1 millisecond, ensuring uninterrupted power supply.
► Strong charging capability: It can charge energy storage devices to full capacity and, following the first deep voltage sag, rapidly recharge discharged energy storage units, effectively addressing the common issue of consecutive voltage sags during thunderstorm conditions.
► High utilization of energy storage components: A wider input DC voltage range offers greater convenience to customers, optimizing initial investment.
► Simple operation and maintenance: Supercapacitors offer long service life, making maintenance even easier; the power section features a modular design.
► Intelligent management of energy storage devices: An intelligent over-capacity management system is employed to detect abnormal conditions in supercapacitors in real time.

Working principle

Series	DVR 50–150 kVA	DVR 200–350 kVA	DVR 400–450 kVA	DVR 500 kVA and above
System Parameters
Rated voltage	208V, 220V, 380V, 400V, 415V, 460V, 480V
Rated capacity	50 kVA, 75 kVA 100 kVA, 150 kVA	200 kVA, 250 kVA 300 kVA, 350 kVA	400 kVA, 450 kVA	500 kVA and above capacity
Rated frequency	50Hz/60Hz, ±5Hz
Voltage range	-40% to +20% (adjustable)
DC operating voltage	180–750 Vdc (the minimum voltage can be adjusted according to customer requirements)
Number of units that can be paralleled	8
Overall machine efficiency	≥99%
Wiring method	Three-phase three-wire; three-phase four-wire
Inbound call method	Upper and lower incoming lines
Airflow method	Air enters from below and exits from above.
Performance Metrics
Total response time	<1ms
Voltage accuracy	1%
Temporary Voltage Sag Compensation Capability	100%, with a compensation time of 3 seconds; longer compensation times can be achieved by adding supercapacitors, as per customer requirements.
Overload capacity	Overload of 125% is permissible for a minimum of 10 minutes; overload of 150% is permissible for a minimum of 1 minute.
Cooling mode	Air-cooled
Noise	<68dB
Fixing method	Cabinet
Size *(WidthDepthHeight mm)*	60010002000	Power cabinet:	Power cabinet:	For capacities exceeding 500 kVA, dimensions are customized to suit the specific rating.
		60010002000	60010002000
		Overcapacity cabinet:	Overcapacity cabinet:
		60010002000	80010002000
Environmental parameters
Altitude	≤2000m, 2000m–4000m derating
Operating temperature	-10℃~40℃
Relative humidity	5%RH–95%RH, non-condensing

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PRODUCT MESSAGE

Guangdong Guangda Electric Co. Ltd.

Tel：18028173868
E-mail：gdgddq@126.com
Web：www.gd96.com
Add ：Building 3, No. 613, Xingtan Shuixiang Avenue, Gaozan Village, Xingtan Town, Shunde District, Foshan City, Guangdong Province

The DVR is connected in parallel with the utility grid. When the grid voltage is normal, the supply SCR turns on, allowing the grid to directly power the equipment, while the bidirectional converter remains in standby and continuously monitors voltage fluctuations in the grid.
When the DVR detects an abnormal voltage fluctuation, it switches the downstream equipment to power supplied by a supercapacitor or other energy-storage device, ensuring that the operation of the connected loads remains unaffected.
When the grid voltage returns to normal and the DVR determines that power quality meets the required standards, it switches the downstream equipment back to grid‑supplied power while simultaneously charging the backup energy storage device via the bidirectional converter.