High Voltage Test Solutions
Persistently developing technology, improving quality, management, and service standards

Series Resonance Test Device

LHV(H) AC Resonant Test System for CVT Calibration up to 500kV

Professional LHV(H) AC Resonant Test System for on-site calibration of 500kV capacitive voltage transformers (CVT). Features stable waveform output, 1/Q power efficiency, and advanced protection functions.


>>>WhatsApp Communication<<<

Product Details

Product Tags

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 Capacity80kVA
rated voltage160kV
Adjustable inductance range65~130H
Rated frequency50Hz
Rated current0.5A
Adjustable gap range0~300mm

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

ParameterSpecification
Maximum Output Voltage500kV AC
Frequency Range45-65Hz (50Hz optimized)
Waveform Distortion<3% THD
Power Requirement1/10 of test capacity (Q>10)
Protection ClassIP54 (field use standard)

Working Principle

The system utilizes series resonance technology to create a current filtering circuit that:

  1. Fully compensates reactive power through LC resonance

  2. Generates pure fundamental frequency current

  3. 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:

FeatureLHV(H) SystemTraditional Equipment
Power Consumption1/Q of test capacityFull test capacity
Transport Weight60% lighterBulky transformers
Fault CurrentSelf-limitingRequires 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.

>>>WhatsApp Communication<<<

>>>Click To Get Quote<<<

Leave Your Message

Leave Your Message