three phase voltage regulator
1.Wide voltage regulation range and high accuracy
2.Multi-level security protection, energy efficiency, clean power supply
3.Compact, durable, quiet operation, high versatility and wide compatibility.
4.Durable and reliable, suitable for harsh environments
Technical description of the voltage regulator SVR-2000/10-7
1. Main technical parameters
| Indicator | Main Features |
Model |
SVR-2000/10-7 |
Rated power |
2000 kVA |
Rated voltage |
Primary: 10 kV (regulated); Secondary: 10 kV (stabilized output) |
Voltage regulation mode |
Automatic regulation under load on 7 branches (control range ±7%, step 1% per branch) |
Regulation range |
9.3 kV ~ 10.7 kV (corresponding to ±7%) |
Frequency |
50 Hz |
Cooling method |
Natural oil cooling, natural air cooling (ONAN) |
Insulation class |
Class A (oil-filled version) |
Winding material |
All copper windings |
Equipment type |
Three-phase voltage regulator |
Scope of application |
10 kV distribution lines, areas with unstable voltage: industrial enterprises, mining areas, rural power grids |
2. Design and equipment
Basic design
Oil-filled magnetic circuit and windings with a corrugated tank. The housing is made of painted cold-rolled steel, has high anti-corrosion and anti-rust resistance, and is intended for outdoor installation.
Voltage regulation system
An electrically driven on-load tap changer is installed at the top. Provides automatic switching of branches under load and voltage stabilization without turning off the power.
Protection and control
Expansion tank (oil cushion) and oil level indicator on top: oil level control, compensation for thermal expansion and oil compression.
Pressure relief valve on the right: Automatically releases excess pressure to prevent tank rupture.
Oil thermometer, oil level indicator and Buchholz gas relay: continuous monitoring of temperature and oil level, as well as internal equipment damage.
External control cabinet: integrates voltage regulation, voltage measurement and protection logic functions, supports local and remote control.
Insulation and sealing
The completely sealed design with a one-piece corrugated tank prevents moisture absorption and oxidation of transformer oil, extending the service life of insulating materials.
Cooling system
Equipped with corrugated or plate radiators with natural air cooling. No additional fans are required, which reduces operating costs.
3. Functions and operational features
Main function of voltage stabilization
Load regulation in 7 stages allows you to maintain a stable output voltage of 10 kV with mains voltage fluctuations within ±7%, guaranteeing the quality of power supply to consumers.
Application in power lines
Designed specifically for long 10 kV distribution lines. Solves the problems of high voltage drop and undervoltage at the end of the line. Widely used in mining, rural and industrial areas with unstable power supply.
Comprehensive protection system
It has over/under voltage protection, overcurrent protection, Buchholz gas protection and overheating protection. If a malfunction occurs, an automatic alarm is activated and the equipment is blocked.
Low maintenance and long service life
The oil-filled design with copper windings has no wearable mechanical parts. During normal operation, the service life exceeds 20 years; it is enough to periodically monitor the level and quality of transformer oil.
Adaptation to outdoor conditions
The degree of protection IP20/IP23 allows open outdoor installation. The equipment is resistant to temperature changes, precipitation and corrosion, and is suitable for operation in difficult climatic conditions.
4. Additional technical notes
The equipment belongs to the linear voltage regulators of the SVR series. Unlike conventional distribution transformers, its main task is to stabilize the voltage in a 10 kV line without changing the voltage class, and not to increase or decrease the voltage.
The 7-stage design provides more accurate voltage correction compared to regulators on 3 and 5 taps, ideal for operation in conditions of strong fluctuations in mains voltage.
