LBQ-III Earth Leakage Circuit Breaker Tester: Technical Overview and Performance Analysis

The LBQ-III Earth Leakage Circuit Breaker (ELCB) Tester is a handheld diagnostic instrument designed for evaluating the performance of residual current devices (RCDs) in electrical systems. It enables precise measurement of critical parameters, including trip current thresholds, non-trip current limits, and response times, ensuring compliance with safety standards. With its compact design, multi-range testing capabilities, and high-resolution display, the LBQ-III serves as an essential tool for field technicians and electrical engineers.

Key Features

1.Portable Design
Compact dimensions (195×101×42mm) and lightweight construction facilitate on-site testing in confined spaces or remote locations.

2.Multi-System Compatibility
Supports testing of single-phase (AC220V) and three-phase (AC380V) RCDs, covering residential, commercial, and industrial applications.

3.Automated Current Detection
Automatically identifies the exact trip current threshold across ten selectable ranges (30–1000mA), eliminating manual guesswork.

4.Direct Time Measurement
Accurately records RCD response times from 0 to 799ms with 0.5%±2-digit precision, critical for verifying time-sensitive protection mechanisms.

5.Enhanced Visibility
Features a 16-character blue backlit LCD for clear data readability in low-light environments.

Technical Specifications

1.Input Voltage: AC220V/380V ±10%

2.Test Voltage Tolerance: ≤AC250V

3.Trip Current Ranges: 30, 50, 75, 100, 150, 200, 250, 300, 500, 1000mA (Class 1 accuracy)

4.Response Time Range: 0–799ms (±0.5% +2 digits)

5.Operating Conditions:

Temperature: 0°C to 40°C

Humidity: <85% RH (non-condensing)

Performance Advantages

1.Precision Calibration: Class 1 current accuracy ensures reliable compliance testing per IEC 61008/61009 standards.

2.Rapid Diagnostics: Sequential testing of trip thresholds and response times streamlines safety inspections.

3.Robust Build: Engineered for durability in harsh environments, with components rated for industrial-grade electrical stress.

 Application Scenarios

1.Preventive Maintenance: Validate RCD functionality in switchgear panels, distribution boards, and machinery.

2.Fault Investigation: Diagnose nuisance tripping or failure-to-trip incidents by isolating leakage current anomalies.

3.Regulatory Audits: Generate documented test results for safety certifications or regulatory inspections.
The LBQ-III ELCB Tester combines portability with laboratory-grade precision, addressing the growing demand for efficient RCD validation in modern electrical networks. Its ability to deliver rapid, repeatable measurements of trip characteristics makes it indispensable for ensuring personnel safety and equipment integrity. Technicians are advised to adhere to the specified environmental limits (temperature/humidity) and periodic calibration schedules to maintain measurement traceability.

GDZX is a manufacturer of power testing equipment, offering a wide range of product categories with comprehensive models and providing professional technical support. Contact: +86-17396104357.Website: https://www.highvoltage-testequipment.com/