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.

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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 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.