BS0303A-200 Loop Resistance Tester

BS0303A-200 Loop Resistance Tester

BS0303A-200 Loop Resistance Tester

Product Introduction

At present, the conventional QJ44 double arm DC bridge is commonly used for measuring contact resistance in power systems. However, the test current of this type of bridge is only in the mA level, making it difficult to detect the defect of reduced cross-sectional area of the circuit conductor. When measuring the contact resistance of high-voltage switch conductive circuits, the measured value is several times larger due to the influence of oil film and oxide layer between the contacts, and cannot truly reflect the contact resistance value. To this end, the Ministry of Electric Power standard SD301-88 "Code for Handover and Preventive Testing of AC 500KV Power Equipment" and the new version of "Code for Preventive Testing of Power Equipment" stipulate that the measured current of contact resistance of circuit breakers and isolating switches shall not be less than 100A DC to ensure accurate test results.

The BS0303A-200 circuit resistance tester is designed based on the power implementation standard DL/T845.4-2004 of the People's Republic of China, using a combination of high-frequency switching power supply technology and digital circuit technology. The circuit resistance tester is suitable for measuring the circuit resistance of switch control equipment, and its testing current adopts the recommended DC 100A and 200A in the national standard. It can directly measure the circuit resistance at 100A or 200A, and the final test results are displayed in numbers; The instrument measures accurately and has stable performance, meeting the requirements of on-site high-voltage switch maintenance and high-voltage switch factory circuit resistance testing for power and supply departments.

Product Features

1. High current: The circuit resistance tester adopts new power supply technology, which can continuously output high current for a long time, overcoming the drawbacks of instantaneous current of pulse power supply. It can effectively penetrate the oxide film of switch contacts and obtain good test results.

2. Strong anti-interference ability: Under severe interference conditions, the last bit of data on the LCD screen can remain stable within ± 1 word range, with stable readings and good repeatability.

3. Long service life: All use high-precision resistors, effectively eliminating the influence of environmental temperature on measurement results. At the same time, the use of military connectors enhances vibration resistance.

4. Convenient to carry: small size and light weight.

Technical parameters (special parameters can be customized)

Measurement range: 1-1999 μ Ω

Resolution: 1 μ Ω

Test current: Four fixed outputs of DC50A, 100A, 150A, and 200A.

Measurement accuracy: 0.5% ± 1d

Working mode: Connection

Display mode: Three and a half digit LCD

Note: Due to continuous product updates, the appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice, and our company reserves the right of interpretation; If there is any act of theft or copying, legal responsibility will be pursued.