Electric power workers often come into contact with circuit resistance testers in their daily work. Circuit resistance testers are mainly used for high-precision measurement of high and low voltage switch contact (circuit) resistance, cable line DC resistance, and other occasions that require high current and micro resistance measurement. Due to oxidation of the contact surface and poor contact fastening, the contact resistance increases. When a large current flows through, the temperature of the contact point increases, further accelerating the oxidation of the contact surface and increasing the contact resistance. If it continues, serious accidents will occur. Therefore, it is necessary to measure contact resistance frequently or regularly.
1. The purpose of loop resistance measurement testing is:
Measure the contact resistance of the conductive circuit in a closed state, whether there is friction at the mouth, and whether there is an oxide layer on the contact surface. Check the circuit for contact defects and good contact.
2. The practical application field of circuit resistance tester:
① High voltage, medium voltage, and low voltage circuit breakers;
② Switch circuit resistance;
③ The resistance at the connection point of high current busbars (such as copper bars, aluminum bars, etc.), the contact resistance at the sleeve connection point, the resistance at the cable connection point, and the resistance at the welding point.
3. What are the market advantages of circuit resistance testers?
① High current:
Adopting new power supply technology, it can continuously output large current for a long time, overcoming the drawbacks of instantaneous current in pulse power supply, effectively breaking through the oxide film on switch contacts, and obtaining good test results.
② Strong anti-interference ability:
Under severe interference conditions, the final data of the LCD screen can be stable within the range of ± 1 word, with stable readings and good repeatability.
③ Long service life:
All adopt high-precision resistors, effectively eliminating the impact of environmental temperature on measurement results, and the use of connectors enhances vibration resistance.
④ Convenient to carry:
Small size and light weight.
The ZC-302D circuit resistance tester is based on a combination of high-frequency switching power supply technology and digital circuit technology, and is suitable for measuring the circuit resistance of switch control equipment. Its testing current adopts the DC 100A and 200A recommended by national standards. The circuit resistance can be directly measured at a current of 100A or at a current of 200A, and the test results are displayed digitally. 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 by the power and power supply departments.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase.
