Voltage Restorer
The interference of system voltage causes short-term voltage dip on the load side (lasting from several to dozens of cycles), which is the primary cause of malfunctions in sensitive loads, particularly in computer equipment.
Products Description
Dynamic Voltage Restorer (DVR) adopts the latest PWM interleaving technology. In case of a voltage dip, the DVR can quickly compensate for voltage fluctuations, correct three-phase voltage imbalances, mitigate flicker, and adjust voltage deviations to maintain stable output voltage, thereby protecting loads.
Product Type
Online DVR-X
The product is composed of an inverter, isolation transformer, supercapacitor, SCR switch, etc., with the superca-pacitor providing energy to the grid for compensation. In case of a voltage dip, the grid voltage can be disconnected, allowing the supercapacitor to supply energy to the load without being affected by fluctuations in the grid voltage. Compensation depth can cover 0-130%.
Offline DVR-D
The product consists of a rectifier, inverter, compensation transformer, and bypass. The compensation energy is sourced from the power grid via the converter. It offers a voltage dip compensation depth of 40%, completely correcting the voltage dip, and effectively addressing the voltage dips and surges, which helps prevent economic and production losses caused by voltage fluctuations to users.
Application Scenarios
It is applied in industries with continuous operations, such as chip manufacturing, automotive, pharmaceuticals, petrochemicals, hospitals, power plants, food processing, chemical fibers, glass production, data centers, and tobacco.
The DVR device can be installed in series between the data center, servers, and system power supply to protect against voltage dips, preventing server failures and data loss, and enhancing the safety and reliability of computer systems;
The DVR device can also be installed in series between sensitive loads and system power supplies to protect against voltage distur-bances, preventing malfunctions in sensitive loads. For example, in semiconductor factories, it safeguards against voltage dips and short interruptions that could otherwise lead to significant economic losses and a large amount of scraped products;
For UPS applications that do not require long-term power backup, the DVR device offers superior dynamic voltage compensation capabilities and a better cost-performance ratio compared to UPS systems, making it an effective solution for improving voltage quality on the load side.
Data Sheet
| Electrical Parameters (without super capacity) | |
| Wiring method | Three-phase four-wire |
| Input voltage | 400V ±20% |
| Operating frequency | 50/60Hz, ±10% |
| Product specifications | 30kVA, 100kVA, 150kVA, 200kVA, 300kVA, 450kVA, 600kVA |
| Noise | ＜75dB |
| Technical Features | |
| Switching devices | IGBT |
| Heat dissipation methods | Intelligent air cooling |
| Heat dissipation control | Adaptive fan speed adjustment |
| Protection functions | Fault bypass and maintenance bypass optional |
| Product Performance | |
| Voltage resolution accuracy | 0.1V |
| Overall efficiency | Bypass mode > 99%, voltage regulation mode > 95% |
| Full response time | ＜2ms |
| Dip compensation capability | ±20% for extended operation, 60%~100% duration 45s, 50%~90% duration 8s. |
| Display Interface | |
| Display screen | 7-foot full-color touchscreen |
| Language | Chinese, English, and customizable languages |
| Battery display | Parameter control, system time log, voltage event log, event recording and data recording, waveform recording function |
| Communication interface and protocol type | RS485, Modbus protocol; TCP/IP protocol; RS232 |
| Environmental Conditions | |
| Operating temperature | -25℃~+45℃ |
| Relative humidity | 5%~95%, no condensation |
| Altitude | <1000m, power decreases by 1% for every 100m increase; maximum 4000m |
| Others | |
| Protection level | IP20 rating, other ratings available upon customization. |
| Installation method | Integrated rack type, bottom in and bottom out |
Q&A
- Low losses and high efficiency: Efficiency exceeds 99%.
- Strong environmental adaptability: The operating temperature can reach 50°C.
- High output waveform quality: The output waveform distortion rate is less than 3%.
- Easy maintenance: Maintenance-free, standby-free, and pollution-free.
- Fast response: Response time ≤ 3ms.
- Strong control capability: The control voltage amplitude range is 0-130% of the rated voltage, achieving full voltage and power control.
Installing a DVR can improve power supply stability, effectively ensure the continuous operation of equipment, and solve power quality problems such as voltage swells, voltage sags, short interruptions, instantaneous disturbances, and voltage amplitude fluctuations in the power supply system at the source, ensuring that process equipment is protected from the harm of voltage sags.
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