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Series Resonance Test Device

LHV Variable Frequency Series Resonant System - AC/DC Withstand Voltage Testing Solution

Discover the LHV Series Resonant System for high-voltage AC/DC withstand testing of cables, transformers, and GIS. Features dry epoxy insulation, multi-mode operation, and compact design.


  • US$1.00; Negotiated Price
  • Lead time: 90days

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Product Details

Product Tags

LHV Variable Frequency Series Resonant Testing System

Product Overview

The frequency conversion series resonant test system utilizes series resonance principle to perform AC/DC withstand voltage tests on:

  • Cross-linked cables

  • Power transformers

  • GIS equipment

  • Generators and busbars

Ideal for utility companies, HV test labs, and electrical maintenance teams.

Product Parameters

technical parameter

Rated output voltage0~1000kV and below
output frequency30~300Hz
Resonance voltage waveformPure sine wave, waveform distortion rate≤1.0%
Working timeFull power continuous working time of 60min
Quality factor30~90
Frequency regulation sensitivity0.1Hz
Instability<0.05%
Working power supplySingle-phase 220V or three-phase 380V±10%
Power frequency 50Hz±5%

Serial product configuration(Application range (10kV ~ 500kV voltage grade substation electrical equipment ac withstand voltage equipment, frequency 30 ~ 300Hz))

Product model nameVariable frequency sourceResonant reactorExciter transformerVoltage dividerScope of application
UHV-50/504kW25kV/1A two(dry)4kVA(dry)50kV1000kVA and below 10kV power transformer. 10kV  switch , bus, PT, CT, etc. 10 kv (300mm2) cable 1.0 km or less
UHV-108/1086kW27kV/1A four(dry)6kVA(dry)110kV31500kVA and below 35kV power transformer. 35kV  switch , bus, PT, CT, etc. 10 kv (300 mm2)cable≤2km.35kV (300mm2)cable≤0.5km
UHV-200/20010kW50kV/1A four(dry)10kVA(dry)200kV50000kVA and below 110kV power transformer.110kVGIS、PT、CT etc.(Preventive test).35kV(300mm2)cable≤1.0km.10kV (300mm2)cable≤2.0km
UHV-270/27015kW45kV/1A Six sets of(dry)15kVA(dry)300kV50000kVA and below 110kV power transformer.110kVGIS、PT、CT etc..35kV(300mm2)cable≤1.2km.10kV (300mm2)cable≤3.0km
UHV-800/40030kW50kV/2A eight(dry);
100kV/2A four(oil-immersed)
30kVA(dry);
30kVA(oil-immersed)
400kV80000kVA and below 220kV power transformer.50000kVA and below 110kV power transformer.110kV/220kVGIS、PT、CT etc..35kV(300mm2)cable≤2.0km.110kV (300mm2)cable≤0.7km
UHV-1600/80060kW200kV/2A four(oil-immersed)60kVA(dry)800kV220kV power transformer of 80000kVA and below.50000kVA and below 110kV power transformer.500kVGIS、PT、CT etc..220kV  switch 、GIS、PT、CT etc..110kV(400mm2)cable≤1.5km.220kV (400mm2)cable≤1.0km

Note:

The appearance of the product shall be subject to the actual product,technical parameters with model if there are any changes,without notice.In case of misappropriation or copying, legal liability will be investigated.

System Components

Core Configuration:

  • Frequency conversion control power supply

  • Excitation transformer

  • High-voltage reactor

  • Capacitive voltage divider

  • Optional compensation capacitor

Key Technical Advantages

FeatureBenefit
Dry epoxy insulationHigh mechanical strength + superior dielectric properties
Compact reactor design30% lighter weight than conventional models
Multi-mode operationSupports automatic/semi-auto/manual testing
Wide input voltage220V single-phase or 380V three-phase compatible

Application Scenarios

Standard Compliance Testing:

  • IEC 60270 Partial Discharge Measurement

  • IEEE Std 400 Cable Testing

  • GB/T 16927.1 HV Test Procedures

Field Applications:

  1. Pre-commissioning cable tests

  2. Transformer routine maintenance

  3. GIS installation verification

  4. Generator winding integrity checks

Technical Specifications

  • Output Frequency Range: 30-300Hz

  • Temperature Rise: ≤45K at rated load

  • Protection Class: IP54 (standard)

  • System Q Factor: ≥40 (typical)

  • Waveform Distortion: THD ≤1%

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