Series Resonance Test Device
LHV Portable AC Resonant Test System for Cable Testing
On-Site Cable Testing Solution
This frequency conversion resonant test system specializes in AC withstand voltage tests for:
35kV and below distribution cables (portable configuration)
110kV+ transmission cables (with oil-immersed reactors)
Cross-linked polyethylene (XLPE) and oil-paper cables
Designed for field maintenance teams and cable installation crews.
Product Parameters
| Rated output voltage | 0 ~ 220kV(AC effective value) and below |
| output frequency | 30～300Hz |
| Resonance voltage waveform | Pure sine wave, waveform distortion rate≤1.0% |
| Full load working time | Continuous working time of 60min |
| System quality factor | Under maximum load≥20 |
| Frequency adjust fineness | 0.1Hz |
| Instability | ≤0.01% |
| Working power supply | Single-phase 220V or three-phase 380V±10%，Power frequency 50Hz±5% |
Core Technology
Advanced Electrical Design:
SPWM Digital Waveform Generator - Minimizes harmonic distortion
IPM Power Module - Ensures stable high-power output
Orthogonal Asynchronous Modulation - Reduces switching losses
Mechanical Advantages:
Dry epoxy cast reactors - No oil leakage risk
Modular design - 30kg single-person portable units
Optional electric crane - For 100kg+ oil-immersed reactors
System Configuration
| Component | 35kV Portable Version | 110kV+ Stationary Version |
|---|---|---|
| Reactor Type | Dry epoxy cast | Oil-immersed |
| Max Unit Weight | 30kg (single person) | 100kg+ (with crane) |
| Power Input | 220V single-phase / 380V three-phase | |
| Typical Test Voltage | 2-3× rated voltage | 1.7-2.5× rated voltage |
Field Deployment Advantages
Mobility Features:
Two-person portable mode (≤60kg assemblies)
Standard 19" rack-mountable components
IP54 protection for outdoor use
Test Efficiency:
5-minute setup time for pre-configured tests
Auto-resonance frequency tracking
Real-time PD monitoring capability
Technical Specifications
Frequency Range: 30-300Hz (programmable)
Voltage Accuracy: ±1% of reading
Reactor Q Factor: ≥40 (dry type), ≥60 (oil type)
Safety Standard: IEC 61010-1 CAT IV
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