100A Contact Resistance Tester for Circuit Breakers

The Handheld Loop Resistance Tester is a portable high-precision instrument designed for measuring the contact resistance and loop resistance of circuit breakers, disconnect switches, switchgear, busbar joints, and other conductive electrical connections.

Using a stable DC output current of up to 100A, the tester accurately measures ultra-low resistance values to evaluate contact quality, detect poor electrical connections, and prevent overheating or equipment failure. It's widely used in substations, power plants, electrical utilities, industrial facilities, equipment manufacturers, and testing laboratories.

Technical Parameters

Application Scenarios

• Circuit breaker contact resistance testing
• High-voltage switchgear maintenance
• Disconnect switch inspection
• Busbar joint resistance measurement
• Transformer connection resistance testing
• Power transmission and distribution maintenance
• Electrical equipment commissioning
• Preventive maintenance in substations
• Electrical equipment manufacturing quality control

Key Features

High-Precision Measurement
Measures extremely low contact resistance with a resolution of 0.01μΩ, ensuring reliable evaluation of electrical contacts.

Powerful 100A Test Current
Selectable output currents of 30A, 50A, 80A, and 100A meet different testing standards and application requirements.

Portable Field Operation
Compact handheld design with a built-in rechargeable lithium battery supports more than 600 tests on a single charge, suited to outdoor maintenance.

DC Voltage Drop Method
A stable DC current is injected into the tested conductor while the voltage drop across the contact is measured; resistance is calculated via Ohm's Law (R = U/I), minimizing contact interference for accurate low-resistance readings.

Intelligent Data Management
Stores up to 1000 groups of measurement data for review, analysis, and report generation.

Reliable Safety Protection
Built-in open-circuit protection, overheat protection, and intelligent power management.

OEM/ODM Customization

Logo & Branding
Your company logo and branding can be applied to the unit and its interface.

Appearance & Case Color
Case color and exterior finish can be adjusted to match your brand or product line.

Functional Parameters
Output current options, test duration settings, and other functional configurations can be customized to your specification.

Software UI & Language
Touchscreen interface language and layout can be customized for your target market.

MOQ & Lead Time
MOQ of 1 unit for logo/appearance customization. Lead time is standard production plus 1–2 weeks for customized units.

Get Your Loop Resistance Tester Solution

Tell us your requirements and our engineers will recommend the right configuration.

• Test Object
• Required Specifications
• OEM/ODM Requirements
• Quantity
• Test Location

Request a Quote

Why Choose HKVTEST

HKVTEST is a National High-Tech Enterprise with over 16 years of experience manufacturing electrical testing equipment, holding 10+ patents. Every unit is factory-calibrated, tested, and inspected before shipment, backed by a 2-year warranty, lifetime technical support, and OEM/ODM customization. We've supplied testing equipment to customers across Rwanda, Tanzania, the Philippines, Vietnam, and India.

FAQ

What is a loop resistance tester used for?

It measures the contact resistance of circuit breakers, disconnect switches, switchgear, busbars, and other electrical connections to evaluate conductive performance and safety.

Why is a 100A testing current important?

Higher testing current reduces measurement error caused by contact oxidation and provides more accurate resistance values in accordance with industry testing standards.

Is this tester suitable for outdoor field testing?

Yes. The built-in rechargeable battery, lightweight handheld design, and rugged construction make it suited to field maintenance work.

Does it support report printing?

Yes. An optional Bluetooth printer is available for wireless printing of test reports.

Contact Us

Need Professional Advice?
Our engineers can recommend the right equipment configuration based on your test object, required resistance range, and site conditions. Contact us for technical recommendations and product selection assistance.

WhatsApp: +86 180 7153 1810
Email: fionahuang60@gmail.com
Website: www.hkvtest.com

About HKVTEST

HKVTEST is the global brand of Wuhan Hongzhi Gaocetest Electrical Technology Co., Ltd., a National High-Tech Enterprise with over 16 years of experience in electrical testing equipment R&D and manufacturing, holding 10+ patents.