LQHV-802 Microcomputer Relay Protection Test Set

Industrial-Grade Relay Testing with Windows XP Platform

The LQHV-802 integrates industrial PC technology with advanced DSP signal processing, delivering 4-phase voltage and 3-phase current outputs in a rugged, portable package. Ideal for testing differential relays, overcurrent protection, and auto-reclosing systems.

Product Parameters

AC current output

DC current output

AC voltage output

DC voltage output

Switch quantity and time measurement

Key Specifications

• Output Capacity: 4×120V (phase), 3×120A (10 sec)

• Control System: Industrial PC w/ Windows XP

• Display: 6.4" TFT LCD (1280×800)

• Interfaces: USB 2.0, RS232, 10/100M Ethernet

• Accuracy: ±0.2% (voltage), ±0.3% (current)

Innovative Design Features

1. Windows XP Operational Platform

• Familiar desktop interface reduces training time

• Trackball + keyboard control (external mouse optional)

• Real-time waveform display during tests

2. DSP Digital Signal Processing

• 32-bit floating-point calculations for precision waveforms

• 0.1Hz–2kHz frequency bandwidth

• Harmonic distortion <0.5% at full load

3. Linear Power Amplifier Technology

• Eliminates high-frequency interference vs switching amplifiers

• Maintains waveform fidelity from 1mA to 120A

• Active cooling system with temperature monitoring

Workflow Advantages

1. Standalone Operation – Complete tests without external PC

2. Automated Sequences – Pre-programmed test routines (50+ templates)

3. Data Export – USB saves test reports in PDF/Excel formats

4. DC Power Supply – Built-in 110V/220V for relay coil testing

Safety & Reliability

• IP52-rated enclosure for field use

• Soft-start circuit protects internal components

• Automatic shutdown on overtemperature/overload

Why Engineers Prefer LQHV-802

• Time Savings – 50% faster test setup vs conventional testers

• Future-Proof – Software upgradable via USB

• Portability – 30% lighter than comparable systems (9.8kg)