Relay Tester/Secondary Circuit Tester

LQHV-702 Microcomputer Relay Protection Test Set - 3-Phase Relay Testing Solution

Professional-grade LQHV-702 relay protection test set features 4-phase voltage/3-current output, 120A max current, and advanced fault simulation for comprehensive protection relay testing.

US$1.00; Negotiated Price
Lead time: 30days

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Product Details

Product Tags

LQHV-702 Microcomputer Relay Protection Test Set

Advanced 3-Phase Relay Testing Solution

The LQHV-702 represents the latest generation of microcomputer-based relay protection test equipment, combining precision measurement with robust safety features for electrical maintenance professionals. Compliant with IEC 60255 standards, this tester delivers 4-phase voltage and 3-phase current outputs in a compact, portable design.

Key Technical Specifications

Voltage Output: 4×120V (phase-to-neutral)
Current Output: 3×40A continuous (120A for 10 seconds)
Display: 320×240 dot matrix LCD with Chinese/English interface
Accuracy: ±0.5% for voltage/current measurement
Protection: Built-in overcurrent/overvoltage protection with soft-start

Core Product Features

1. Multi-Functional Testing Capabilities

The LQHV-702 supports comprehensive relay testing including:

Differential protection testing
Auto-reclosing simulation
Transient fault reproduction
Harmonic analysis (up to 15th order)

2. Dual Operation Modes

Offers flexible testing options:

Standalone Operation: Rotary mouse control with intuitive menu navigation
PC-Connected Mode: Windows-based software for automated test sequences and report generation

3. Enhanced Safety Design

Intelligent heat dissipation system
Fault self-diagnosis with lockout protection
Isolated DC power outputs (110V/220V)

Product Parameters

Ac current output

Output precision	0.2 class
Phase current output (effective value)	0～40A
Triple current output (effective value)	0～120A
Long-term permissible operating value of phase current (effective value)	10A
Maximum output power of phase current	450VA
Output power at maximum output of three- phase parallel current	900VA
Three parallel current maximum output allowable operating time	10s
Frequency range (fundamental wave)	0~ 1000Hz (online) 0~300Hz (stand-alone)
Harmonic frequency	0~ 20 times (online) 0~6 times (stand-alone)

DC current output

Output precision	0.5 class
Output current	0 ~ ±10A/ phase, 0 ~ ±30A/ terad
Maximum output load voltage	20V

AC voltage output

Output precision	0.2 class
Phase voltage output (effective value)	0～120V
Line voltage output (effective value)	0～240V
Phase voltage/line voltage output power	80VA/100VA
Frequency range (fundamental wave)	0~ 1000Hz (online) 0~300Hz (stand-alone)
Harmonic frequency	0~ 20 times (online) 0~6 times (stand-alone)

DC voltage output

Output precision	0.5 class
Phase voltage output amplitude	0～±160V
Line voltage output amplitude	0～±320V
Phase voltage/line voltage output power	70VA/140VA

Switch quantity and time measurement

	three-phase	note
Switching input	8 road	empty contact: 1 ~ 20mA, 24V
Switching input	8 road	potential contact access："0"：0～ +6V； "1"：+11 V～ +250V
Switching output	4 pair	DC：220V／0.2A；AC：220V／0.5A
Time measurement	measurement range is 0.1ms ~ 9999s	measurement accuracy is 0.1ms