AT series MV adjustable reactor is an inductive load device with adjustable inductance, used in medium-voltage power system test circuits to regulate current, limit short-circuit current, compensate reactive power or simulate actual grid inductive loads. Main applications include:

Inductive load for transformer short-circuit and temperature rise tests

Dynamic and thermal stability tests for MV switchgear and circuit breakers

Switching tests for reactive power compensation equipment (capacitor banks)

Harmonic filtering reactor tests

Short-circuit and starting tests for generators and motors

Short-circuit current limiting in power systems

Characteristic tests for MV cables and electrical equipment

MV insulation design: Rated 6kV/10kV/35kV, insulation level meets GB/T 311 and IEC 60071

Adjustable inductance: Multi-tap stepped adjustment or core air-gap continuous adjustment

Core/air-core options:

Iron-core: High inductance, low losses, suitable for continuous operation

Air-core: Good linearity, no saturation, suitable for high-current impulse tests

Short-time high current withstand: Withstands short-time high current in short-circuit and switchgear tests

Low noise operation: Optimized core structure and air ducts reduce operating noise

Flexible cooling: Natural air (AN) or forced air (AF) cooling

Safety protection: Over-temperature, over-current and grounding protection

• Transformer short-circuit test: Choose air-core reactor for short-time high current and good linearity, avoiding core saturation
• Temperature rise test (continuous): Choose iron-core reactor for low losses and low noise
• Switchgear dynamic/thermal test: Choose short-time high-current reactor matching switchgear rated short-time withstand current
• Reactive power compensation test: Choose adjustable reactor to simulate system inductive load with capacitor banks
• Harmonic filtering test: Choose specific inductance value to form filter branch with capacitors
• Multi-voltage application: Choose multi-tap design for 6kV/10kV/35kV coverage
• Outdoor test station: Choose outdoor protection degree (IP54+), weather and corrosion resistant