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 voltage	0～1000kV and below
output frequency	30～300Hz
Resonance voltage waveform	Pure sine wave, waveform distortion rate≤1.0%
Working time	Full power continuous working time of 60min
Quality factor	30~90
Frequency regulation sensitivity	0.1Hz
Instability	＜0.05%
Working power supply	Single-phase 220V or three-phase 380V±10%
Working power supply	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 name	Variable frequency source	Resonant reactor	Exciter transformer	Voltage divider	Scope of application
UHV-50/50	4kW	25kV/1A two(dry)	4kVA(dry)	50kV	1000kVA and below 10kV power transformer. 10kV switch , bus, PT, CT, etc. 10 kv (300mm²) cable 1.0 km or less
UHV-108/108	6kW	27kV/1A four(dry)	6kVA(dry)	110kV	31500kVA and below 35kV power transformer. 35kV switch , bus, PT, CT, etc. 10 kv (300 mm²)cable≤2km.35kV (300mm²)cable≤0.5km
UHV-200/200	10kW	50kV/1A four(dry)	10kVA(dry)	200kV	50000kVA and below 110kV power transformer.110kVGIS、PT、CT etc.(Preventive test).35kV(300mm²)cable≤1.0km.10kV (300mm²)cable≤2.0km
UHV-270/270	15kW	45kV/1A Six sets of(dry)	15kVA(dry)	300kV	50000kVA and below 110kV power transformer.110kVGIS、PT、CT etc..35kV(300mm²)cable≤1.2km.10kV (300mm²)cable≤3.0km
UHV-800/400	30kW	50kV/2A eight(dry); 100kV/2A four(oil-immersed)	30kVA(dry); 30kVA(oil-immersed)	400kV	80000kVA 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-1600/800	60kW	200kV/2A four(oil-immersed)	60kVA(dry)	800kV	220kV 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

Feature	Benefit
Dry epoxy insulation	High mechanical strength + superior dielectric properties
Compact reactor design	30% lighter weight than conventional models
Multi-mode operation	Supports automatic/semi-auto/manual testing
Wide input voltage	220V 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:

Pre-commissioning cable tests
Transformer routine maintenance
GIS installation verification
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%