Single & Three Phase Shunt Reactor
WEILIAN manufactures single- and three-phase shunt reactors that compensate the capacitive charging current of long transmission and cable lines, limit power-frequency voltage rise, and keep the grid stable and reliable. Connected to the low-voltage side of 10–500 kV substations, our dry-type air-core and iron-core reactors deliver low loss, low noise, high linearity and maintenance-free outdoor operation.
Complete Product Introduction
WEILIAN single- and three-phase shunt reactors are used to compensate the capacitive charging current of transmission and cable lines and to limit the rise of the power-frequency system voltage, ensuring safe and reliable line operation. They are widely applied in long-distance power transmission systems, where they help suppress power-frequency voltage rise, safeguard reliable operation and improve grid power quality.
The reactors are mainly connected to the low-voltage side of 10–500 kV substations and deliver inductive reactive power to the system through the main transformer. By compensating the capacitive current of transmission lines, they prevent the line-end voltage from rising under light load and maintain a stable transmission-system voltage. Carrying alternating current, they operate in parallel with the system and are available in two constructions — air-core and iron-core.
Iron-core shunt reactor — precision-built from premium imported cold-rolled silicon-steel sheets, featuring compact size, low temperature rise and low noise.
Dry-type air-core shunt reactor — an oil-free structure that eliminates the oil-leakage and fire hazards of oil-immersed products, delivering fire-retardant, flame-resistant safety. With no iron core there is no ferromagnetic saturation, so the inductance value stays highly linear.
Product Advantages
- Oil-free dry-type construction — no oil leakage or fire risk; fire-retardant and flame-resistant.
- No iron core and no ferromagnetic saturation, giving excellent inductance linearity.
- Multi-layer parallel cylindrical winding with ventilation air ducts between encapsulations for strong heat dissipation.
- Wound from multiple parallel strands of small-section round conductor, minimizing eddy-current and hysteresis losses.
- Each conductor is insulated with multi-layer half-lapped polyester film for high dielectric strength.
- Windings are tightly wrapped with epoxy-impregnated glass fibre and high-temperature cured into a rigid body — high mechanical strength that withstands short-circuit current impact, with excellent dynamic stability.
- Aluminium star-type conductive frame with low eddy-current loss, meeting the coil’s fractional-turn requirements.
- Anti-ozone, anti-UV protective coating resists ageing with strong adhesion, enduring harsh outdoor climates and greatly reducing civil-works investment.
- Flexible installation, safe operation, noise-free and maintenance-free.
- Flexible, accurate design that meets special customer requirements.
- Coil average temperature rise < 75 K (resistance method).
- Manufactured to standard GB 10229-88 “Reactors”.
Why Choose WEILIAN
ZHEJIANG WEILIAN ELECTRIC runs a 5,000 ㎡ factory with 80+ staff and is ISO 9001:2015 certified, backed by a dedicated R&D centre developing 10+ new products every year.
Two production lines and 180,000+ units of annual capacity mean samples in 24 hours and standard orders typically shipped within 1–2 weeks.
From an MOQ of just 1 unit, wire length, wire diameter and turns are tailored to your reactance and duty, with engineering drawings and on-site technical support.
A supplier to China’s Fortune-500 groups, third-party tested by CTS, with a Vietnam office and exports to Europe, North America, Southeast Asia and the Middle East.
Product FAQ
A shunt reactor is connected in parallel with the system to absorb the capacitive charging current generated by long transmission and cable lines. This limits power-frequency voltage rise, prevents line-end over-voltage under light load and keeps transmission voltage stable and reliable.
Iron-core reactors use imported cold-rolled silicon steel for a compact size, low temperature rise and low noise. Dry-type air-core reactors have no iron core, so there is no ferromagnetic saturation and the inductance stays highly linear; they are oil-free, fire-retardant and maintenance-free for outdoor use.
They are typically connected to the low-voltage side of 10–500 kV substations and are used in power transmission, renewable-energy grid integration, petrochemical, steel and heavy industry, data centres, railway transit and HVDC/FACTS systems.
Yes. From an MOQ of 1 unit, wire length, wire diameter and number of turns can be tailored to your required reactance, current and voltage. Our R&D team also supports non-standard designs and provides engineering drawings.
Products are manufactured to GB 10229-88 “Reactors” with coil average temperature rise below 75 K, under an ISO 9001:2015 quality system, and are verified by third-party testing at CTS.
