Zhejiang Hongyan Electric Co., Ltd. 
ENGINEERED SOLUTION
Steel & Metallurgy
Power factor correction, harmonic mitigation and voltage support for electric arc furnaces, rolling mills, cranes and high-load metallurgical production lines.
HYSVG Pole-Mounted Outdoor Three-Phase Imbalance Correction Device
The HYSVG pole-mounted outdoor compensation device is designed to address the critical power-quality issues commonly found in modern distribution networks. It fully aligns with national guidelines for low-voltage governance and distribution network optimization.
Product Introduction
The HYSVG pole-mounted outdoor compensation device is designed to address the critical power-quality issues commonly found in modern distribution networks. It fully aligns with national guidelines for low-voltage governance and distribution network optimization. By providing fast, precise, and continuous compensation, it effectively resolves three-phase imbalance, low end-of-line voltage, reverse power flow reactive current, and harmonic pollution in distribution systems.
This device improves overall voltage quality, raises terminal voltage levels, enhances power supply reliability, and stabilizes end-user operating conditions. By correcting phase imbalance, it significantly reduces energy losses within low-voltage feeders and distribution transformers, extending transformer service life. It also supports local reactive power balancing, increases distribution capacity, and ensures excellent harmonic mitigation even under nonlinear load conditions.
Product Details
Working Principle
The HYSVG device uses advanced power electronics and real-time digital control to inject or absorb reactive power and unbalanced currents dynamically. An intelligent algorithm monitors system parameters such as phase voltage, current distortion, load imbalance, and harmonic levels, providing rapid compensation through an IGBT-based inverter module.
When the system exhibits unbalanced loads or fluctuating voltage, the HYSVG instantly delivers corrective currents to restore phase symmetry, stabilize voltage, and suppress harmonic components. This ensures improved voltage regulation accuracy and reduces the thermal burden on cables and transformers.
Key Features
- Real-time three-phase imbalance correction with fast dynamic response.
- Significant voltage improvement, especially for end-of-line low-voltage feeders.
- Local reactive power balancing, reducing transformer loading and enhancing capacity.
- Advanced harmonic suppression, suitable for nonlinear loads such as EV chargers, inverters, and industrial equipment.
- Fully automated digital control with continuous monitoring and adaptive compensation.
- Weatherproof outdoor design, suitable for pole-mounted applications in harsh environments.
- High reliability, low maintenance, and long service life.
- Improves distribution efficiency, reduces system loss, and stabilizes user-side power supply.
Product Features & Functions
- Corrects current imbalance within low-voltage distribution networks.
- Compensates excessive neutral-line current.
- Provides dynamic reactive power compensation to stabilize voltage quality.
- Suppresses harmonics and improves overall power quality.
- Supports WiFi local wireless monitoring via handheld terminal.
- Optional GPRS remote monitoring for cloud-based supervision.
- Allows flexible phase-sequence connection; no fixed wiring order is required.
Technical Specifications
Reactive Compensation Capacity Options
| Rating (kvar) | 30 | 50 | 100 | 150 |
|---|---|---|---|---|
| Rated Voltage | 380 V (±20% allowable fluctuation) | |||
| Frequency | 50 Hz (±2%) | |||
| Wiring Method | Three-phase three-wire | |||
| Current Transformer | Optional external CT input (Class 0.5 accuracy or above, ≥5 VA; secondary CT recommended: 5 A) | |||
| Overall Efficiency | ≥97% | |||
| System Power Consumption | ≤3% of rated power | |||
| Switching Frequency | 20 kHz |
| Parameter | Specification |
|---|---|
| Reactive Power Compensation | Achievable compensation accuracy ≥95%.; Power factor after compensation can reach up to 0.99.; Automatically avoids over-compensation. |
| Harmonic Compensation | Supports compensation for the 2nd to 13th harmonic orders. |
| Control Technology | Three-level digital vector control algorithm.; Precise detection of voltage and current waveform distortion for active harmonic suppression. |
| Dynamic Response | |
| Response time | 100 μs / 10 ms. |
| Cooling Method | Forced-air cooling. |
| Noise Level | < 65 dB. |
| Temperature Range | |
| Operating | –10°C to +45°C |
| Storage | –20°C to +60°C |
| Humidity | < 95% RH (non-condensing). |
| Protection Grade | IP54 (with outdoor weatherproof enhancement available). |
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Enclosure Dimensions | 978 mm (H) × 485 mm (D) × 465 mm (W)(Other sizes available upon request.) |
| Material | Stainless steel or galvanized steel plate. |
| Cable Entry | Side cable entry. |
Monitoring & Communication
Local Monitoring
- Wireless handheld terminal.
- Full-parameter viewing and real-time status monitoring via WiFi.
Remote Monitoring
- GPRS-based cloud monitoring platform.
- Supports data reporting, remote parameter management, fault alarms, and historical data review.
Operational Characteristics
- Full-system protection including overtemperature, overvoltage, undervoltage, overcurrent, short-circuit, module overload, and grid-abnormal detection.
- Rapid compensation under varying load conditions.
- Stable continuous operation without resonance risks.
- If grid anomalies occur or the power supply is unstable, the internal protection algorithm isolates device modules from the grid, ensures safekeeping, and restores operation automatically after conditions normalize.
- When external power supply quality severely deteriorates, the device automatically switches to protection mode, preventing faults caused by abnormal grid conditions.
Appearance & Dimensions
Pole-Mounted Outdoor Enclosure
(Description corresponds to the diagram you provided.)
(Description corresponds to the diagram you provided.)
- Front shade-protected waterproof structure.
- Designed for pole-mounting in distribution networks.
- Lockable maintenance door with anti-tamper mechanism.
- Rear ventilation grids and heat dissipation structure.
- Dimensions approx.:
- Width: 650 mm
- Depth: 650–850 mm (depending on model)
- Height: 980 mm
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PROJECT REFERENCE
High Voltage Compensation Unit
High-voltage power factor correction configured for an outdoor industrial distribution system with a target power factor above 0.95.
PROJECT REFERENCE
Transformer Cooling & Efficiency Project
Coordinated power-quality and thermal operating measures for a large-capacity transformer serving a variable industrial load.