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Relay Tester/Secondary Circuit Tester

LQHV-803 Relay Protection Tester - DSP-Controlled 4-Phase Test System

GB/T 7261-compliant LQHV-803 relay tester features DSP control, 4×120V/3×40A output, and Windows XP operation for precision protection relay calibration.


  • US$1.00; Negotiated Price
  • Lead time: 30days

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Product Details

Product Tags

LQHV-803 Three Phase Relay Protection Tester

Compact DSP-Controlled Testing Solution

Engineered to meet GB/T 7261-2016 and DL/T 624-2023 standards, the LQHV-803 combines industrial PC reliability with advanced DSP signal processing for comprehensive protection relay testing. Ideal for field maintenance and lab calibration.

Product Parameters

AC current output

Output Precision0.2 degree
Phase current output (effective value)0~40A
3 phase parallel current output (effective value)0~120A
Phase current long-term allowable working value (effective value)10A
Maximum output power of phase current420VA
Maximum output power of 3 parallel current900VA
Maximum Permitted work time of 3 parallel current10s
Frequency range (fundamental)0~1000Hz
Harmonic time1~20

DC current output

Output Precision0.5 degree
Output current0～±10A/phase, 0～±30A/3 parallel
Maximum output load voltage20V

AC voltage output

Output Precision0.2 degree
Phase voltage output (effective value)0~120V
Line voltage output (effective value)0~240V
Phase voltage / Line phase output power80VA/100VA
Frequency range (fundamental)1~1000Hz
Harmonic time1~20

DC voltage output

Output Precision0.2 degree
Phase voltage output range0～±160V
Line voltage output range0～±320V
Phase voltage / Line phase output power70VA/140VA

Switch quantity and time measurement



note
Switching input10 roadNull contact:1~20mA, 24V potential contact access:"0":0~+6V; "1": +11V to +250V
potential contact access:"0":0~+6V;"1":+11V~+250V
Switching output8 pairDC：220V／0.2A；AC：220V／0.5A
Time measurementmeasurement range is 0.1ms ~ 9999s;measurement accuracy is 0.1ms

Volumetric weight


Industrial control type
Overall dimension375×305×140mm³
Single weight13kg
Power supplyAC 220V±10%, 50/60Hz
Ambient temperature-10℃~+50℃z

Technical Specifications

  • Output Capacity: 4×120V (phase), 3×40A continuous (120A pulse)

  • Control System: DSP+FPGA with 16-bit DAC resolution

  • Display: 8.4" TFT (800×600) with Windows XP interface

  • Accuracy: ±0.2% voltage, ±0.3% current, ±0.5° phase

  • Weight: 12.5kg with carrying handles

Core Features

1. Advanced Output Architecture

  • 4V+3C flexible output configuration

  • Transformer differential testing mode

  • 0.1Hz–1kHz frequency bandwidth

2. Dual Control Modes

  • Standalone Operation: Industrial keyboard/mouse control

  • PC-Connected: USB 2.0 interface for automated testing

3. Linear Power Amplifier Technology

  • <0.5% THD at full load

  • Active cooling with temperature monitoring

  • Soft-start circuit for equipment protection

Workflow Advantages

Automated Testing

Pre-programmed routines for 20+ relay types

Real-Time Analysis

On-screen phasor diagrams and harmonic analysis

Portable Design

30% smaller than conventional test sets

Safety & Reliability

  • IP51-rated enclosure for dust/drip protection

  • Isolated DC outputs (110V/220V 2A)

  • Automatic fault lockout with diagnostic codes

Why Professionals Choose LQHV-803

  1. Regulatory Ready - Full GB/T 7261 compliance documentation

  2. Time Efficiency - 50% faster test setup than manual methods

  3. Investment Value - 3-year warranty with calibration service

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