TKHL-200A Loop Resistance Tester

switch loop resistance tester

  At present, the conventional QJ44 double-arm DC bridge is generally used in the measurement of contact resistance, and the test current of this type of bridge is only mA level.

When measuring the contact resistance of the conductive circuit of a high-voltage switch, due to the influence of the oil film and oxide layer between the contacts, the measured value is several times larger, which cannot truly reflect the contact resistance value. For this reason, electricity

Ministry of Standard SD301-88 "AC 500kV Power Equipment Handover and Preventive Test Regulations" and the new version of "Power Equipment Preventive Test Regulations" make the measurement of the contact resistance of circuit breakers and isolating switches

The current is not less than DC 100A to ensure the accuracy of the test results. The TKHL-200A loop resistance tester produced by Guodian Mingke is based on the new power implementation standard of the People’s Republic of China

DL/T845.4-2004 is designed with a combination of high-frequency switching power supply technology and digital circuit technology. It is suitable for measuring loop resistance of switch control equipment. Its test current adopts national standards

Recommended DC 100A and 200A. The loop resistance can be measured directly at currents of 100A and 200A and displayed digitally. The instrument has accurate measurement, stable performance, and conforms to power, supply

Requirements for on-site high-voltage switch maintenance and loop resistance testing of high-voltage switch factories in the electric department.

 1. Large current: The loop resistance tester adopts new power supply technology, which can continuously output large current for a long time, overcomes the shortcomings of pulsed power supply instantaneous current, and can effectively break down the switch contact oxidation

Membrane, get good test results;

       2. Strong anti-interference ability: Under severe interference conditions, the last digit of the LCD screen can be stabilized within ±1 words, the reading is stable, and the repeatability is good;

       3. The loop resistance tester has a long service life: all high-precision resistors are used to effectively eliminate the influence of ambient temperature on the measurement results. At the same time, the use of military connectors enhances the anti-vibration performance;

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