The LQ Series Resonant Test System delivers precision high-voltage testing for critical power assets including:

✅ Power generators & transformers

✅ GIS switchgear & HV XLPE cables

✅ Bushings & current transformers

Certified for:

Factory acceptance testing (FAT)

Preventive maintenance testing

IEC/GB standard compliance verification

Working Principle: Series-Parallel Resonance Optimization

(H2 Targeting Technical Engineers)

System Configuration Diagram

Resonant test system block diagram

Alt text: "LQ resonant test system workflow with frequency converter, excitation transformer, and reactor"

Frequency Tuning

Adjust output frequency (0.1-300Hz) via 16-bit DSP controller

Achieve resonance between reactor (L) and DUT capacitance (C_X)

Voltage Amplification

Excitation transformer boosts initial voltage

Q-factor amplification enables high-voltage output with low input power

Precision Control

0.01Hz frequency resolution ensures ±0.05% stability

Automatic resonance locking algorithm

Key Features & Innovations

(H2 with USP Highlighting)

Feature Technical Advantage

Intelligent HMI 7" Touchscreen with real-time parameter display & guided test workflows

Multi-protection System Overvoltage/current protection (Class IV), arc suppression, automatic discharge

Advanced Measurement 0.5-class accuracy with DUT capacitance calculation (C_X ±1%)

Compact Design 40% size reduction vs conventional systems (IP54 ruggedized enclosure)

Software Integration RS485/Modbus interface for SCADA connectivity & test data management

Complete System Configuration

(H2 for Component SEO Visibility)

Component Function

Variable Frequency Power 0-400V 3-phase input, 10kHz SPWM control with IPM modules

Excitation Transformer Step-up ratio 1:50, 95% efficiency (silicon steel core)

HV Reactor Q-factor 30-200 (air-core design), 1000kV insulation

Capacitive Divider 1000:1 ratio, ±0.2% accuracy

Compensation Capacitor PF correction to 0.95+

Technical Specifications

(H2 with Structured Data Optimization)

Parameter Specification

Input Power 220V±10% 1φ (≤10kW) / 380V±10% 3φ (>10kW)

Output Capacity 0-8000kVA (user-selectable)

Voltage Range 0-1000kV AC/DC (customizable)

Frequency Range 0.1-300Hz (±0.01Hz resolution)

Environmental -10°C to +45°C, ≤90% RH, ≤2000m altitude

Waveform Distortion ≤0.5% THD (pure sine output)

Acoustic Noise ≤60dB(A) @ 1m distance

Compliance & Safety Certification

*(H2 for E-E-A-T Optimization)*

Insulation Standards: IEC 60270 Partial Discharge Measurement

EMC Compliance: EN 61000-6-4 Industrial Immunity

Safety Certification: CE, CNAS (Lab No. L1234)

Protection Class: IP54 for harsh substation environments