Series Resonance Test Device
LHV(H) AC Resonant Test System for CVT Field Calibration up to 500kV
Product Overview
The LHV(H) AC Resonant Test System represents the industry-leading solution for field calibration of capacitive voltage transformers (CVT) up to 500kV. This adjustable resonance device overcomes the limitations of traditional test equipment in complex field environments while maintaining strict 50Hz frequency requirements.
Product Parameters
Technical parameters
Rated Capacity | 80kVA |
rated voltage | 160kV |
Adjustable inductance range | 65~130H |
Rated frequency | 50Hz |
Rated current | 0.5A |
Adjustable gap range | 0~300mm |
Key Advantages:
Stable output voltage/current waveform with THD < 1%
90% power savings (1/Q power supply requirement)
Automatic arc extinguishing protection system
500kV rating for high-voltage applications
Technical Specifications
Parameter | Specification |
---|---|
Maximum Output Voltage | 500kV AC |
Frequency Range | 45-65Hz (50Hz optimized) |
Waveform Distortion | <3% THD |
Power Requirement | 1/10 of test capacity (Q>10) |
Protection Class | IP54 (field use standard) |
Working Principle
The system utilizes series resonance technology to create a current filtering circuit that:
Fully compensates reactive power through LC resonance
Generates pure fundamental frequency current
Maintains steady-state voltage during fault recovery
Safety Mechanisms:
Automatic flashover protection limits short-circuit current to <10% of test current
Gradual voltage restoration prevents dangerous overshoots
Multi-stage insulation monitoring
Field Application Benefits
Compared to Conventional Test Systems:
Feature | LHV(H) System | Traditional Equipment |
---|---|---|
Power Consumption | 1/Q of test capacity | Full test capacity |
Transport Weight | 60% lighter | Bulky transformers |
Fault Current | Self-limiting | Requires external breakers |
Typical Applications
On-site calibration of 110kV-500kV CVTs
Commissioning tests for new substations
Periodic maintenance of transmission systems
Factory acceptance testing (FAT)
Compliance Standards:
IEC 61869-5 (Instrument transformers)
GB/T 20840.5 (Chinese national standard)
IEEE C57.13 (Accuracy requirements)
Product Nomenclature
Also known as:
Resonant booster for CVT inspection
Frequency conversion series booster
Transformer calibration series resonance booster
Series resonance test equipment
Why Choose Our Solution?
1. Unmatched Efficiency
Requires only 1/10 the power input of conventional test systems through complete reactive power compensation.
2. Enhanced Safety
Three-tier protection system prevents fault escalation during dielectric breakdown events.
3. True Portability
Modular design enables transportation to remote substations without heavy lifting equipment.