UHV-H100B Contact Resistance Tester

• 1、contact resistance tester supplier adopts The new The power supply technology, which can continuously output large current for a long time. The switch contact oxidation film can be effectively broken through, and good test results are obtained

• 2、Strong anti-interference ability: under the condition of serious interference, the last bit data of LCD can be stable at ±1 word The scope of, stable reading, good repeatability

• 3、The contact resistance tester factory has a long service life. All The switch micro ohmmeter adopts high precision resistance, which effectively eliminates The influence of The environment temperature on The measurement results. At The same time, The use of military connectors enhances The anti-vibration performance

• 4、Easy to carry: small volume、light weight

• 1、Fixed Gear Output: It provides fixed DC output currents of 50A and 100A, allowing direct measurement of circuit resistance at these currents as required by national standards.

• 2、High-Precision Measurement: The measuring range is 1 to 1999μΩ with a resolution of 1μΩ and an accuracy of 0.5%±1d. The 3.5-digit LED display provides clear readouts.

• 3、Continuous High-Current Output: Using advanced power supply technology, the instrument can continuously output a large current for extended periods, effectively breaking through the oxide film on switch contacts for accurate results.

• 4、Strong Anti-Interference: Under severe interference conditions, the last digit of the LCD reading remains stable within ±1 count, ensuring stable readings and good repeatability.

• 5、Durable Construction: The use of high-precision resistors effectively eliminates the influence of ambient temperature on measurement results, and military-grade connectors enhance vibration resistance.

• 6、Portable Design: The instrument is compact (390×300×150mm) and lightweight (6kg), making it easy to carry and use in the field.

• 1、Standard-Compliant Testing: It provides the 100A DC test current mandated by standards such as SD301-88 for accurate contact resistance measurement of high-voltage switches, ensuring valid and comparable test results.

• 2、Effective Oxide Penetration: The large, stable continuous current effectively penetrates the oxide film and oil films that form on contacts, which cause low-current (mA level) bridge methods to read inaccurately high.

• 3、Stability and Reliability: Strong anti-interference capability ensures stable readings in harsh field environments. The use of high-precision resistors and military connectors enhances measurement accuracy, temperature stability, and vibration resistance, contributing to a long service life.

• 4、Portability: The instrument is compact and lightweight, making it convenient to carry and use in various field locations.

• 5、Clear Display: The 3.5-digit LED display provides clear and direct readings of contact resistance.

• 1、Power Utilities and Substations: Used for measuring the contact resistance of high-voltage circuit breakers, isolating switches (disconnectors), busbar joints, and other connection points during routine preventive maintenance and handover tests.

• 2、Switchgear Manufacturing: Employed by manufacturers for quality control and factory resistance testing of new switchgear, ensuring contact resistance meets design specifications before delivery.

• 3、Industrial Facilities: Used in industries with large electrical systems (e.g., metal smelting, petrochemicals) for maintenance of high-current switchgear and busbar connections.

• 4、Testing Laboratories: Used by independent testing labs to perform contact resistance measurements for clients as part of equipment condition assessments.

• 5、Maintenance and Repair Facilities: Used during maintenance and repair of high-voltage switches to verify the integrity of contacts and connections after service work.

• 1、Why is a 100A test current required for contact resistance measurement?
  National standards (such as SD301-88 and newer preventive test regulations) mandate a test current of at least 100A DC for circuit breaker and isolating switch contact resistance. Low-current (mA level) tests cannot break through the oxide films and oil layers on contacts, leading to falsely high resistance readings. The high current provides a true measurement of the metallic contact resistance.
• 2、How does the instrument handle interference on-site?
  The contact resistance tester is designed with strong anti-interference capability, ensuring that even under severe interference conditions, the last digit of the LCD reading remains stable at ±1 word. This makes it reliable for use in electrically noisy substation environments.
• 3、What are the advantages of continuous current output?
  Continuous current output, rather than a pulsed current, ensures that the oxide film on the contact surface is effectively broken down, leading to a stable and accurate resistance reading. This overcomes the defect of impulse instantaneous current found in some older designs.
• 4、What are the power supply and environmental requirements?
  The contact resistance tester operates on AC 220V±10%, 50Hz power. It is designed for use in environments with a temperature of -10°C to 40°C and relative humidity of ≤80%RH.
• 5、What are the physical specifications and is it portable?
  The contact resistance tester manufacturer has dimensions of 390×300×150mm and weighs 6kg (excluding attachments). Its compact size and light weight make it convenient for field engineers to transport to different test sites.

Enterprise products in strict accordance with international and national standards and rules of industry production, through the national, provincial and municipal electric power research institute and electric power authorities detection, measuring center, fully passed the ISO9001 international quality management system certification, the licence for manufacturing measuring instruments of the People's Republic of China, GB/T19001-2016 quality management system requirements, GB/T24001-2016 environmental management system requirements, GB/T45001-2020 occupational health and safety management system requirements.

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