LQHV-H200A 200A Micro Ohmmeter | High-Current Contact Resistance Tester

The LQHV-H200A Micro Ohmmeter is a professional-grade instrument for high-current circuit resistance measurement in high-voltage switches and power equipment. With 200A DC output (recommended by national standards), it overcomes the limitations of traditional mA-level testers, providing accurate results even with oxidized contacts.

Technical parameters

Product Overview

Conventional testers (e.g., QJ44 bridge) use low-current methods that fail to detect conductor defects or penetrate oxidation layers. The H200A solves this with:

• 200A DC current (exceeds 100A minimum per DL/T 845.4-2004)

• Dual-range operation (100A or 200A selectable)

• High stability (±1 digit under interference)

Key Specifications

• Test Current: 100A or 200A DC (user-selectable)

• Resolution: 0.1μΩ (high-precision measurement)

• Accuracy: ±0.5% RDG ±2 digits

• Compliance: DL/T 845.4-2004, power industry standards

• Display: Digital LCD with stable readings

Core Advantages

1. High-Current Testing

200A DC output penetrates oxidation films and oil layers for true contact resistance values.

2. Industrial-Grade Reliability

Military connectors and precision resistors ensure stability in harsh environments.

3. Anti-Interference Design

Maintains ±1-digit accuracy even with electrical noise.

4. Portable & Efficient

Compact and lightweight for field use in substations or factories.

Applications

• HV switch and circuit breaker maintenance

• Isolating switch contact resistance testing

• Power equipment preventive testing

• Factory acceptance tests (FAT)

Why Choose the H200A?

1. Exceeds Standards: 200A output surpasses 100A minimum requirements.

2. Field-Proven: Military-grade components resist vibration/temperature effects.

3. Time-Saving: Detects hidden conductor defects missed by low-current testers.

Note: For optimal performance, pair with manufacturer-recommended test leads.