TKHL-100A 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. It is difficult to find the shortcomings of the reduction of the loop conductor cross-sectional area.

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 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 measured current is not less than the DC 100A requirement to ensure the accuracy of the test results.

         TKHL-100A loop resistance tester is designed according to the new power implementation standard DL/T845.4-2004 of the People’s Republic of China, using high-frequency switching power supply technology and digital circuit technology.

Become. It is suitable for measuring loop resistance of switch control equipment. The test current adopts the DC 100A recommended by the national standard. The loop resistance can be directly measured at a current of 100A, and the number of

The words are displayed. The instrument is accurate in measurement and stable in performance. It meets the requirements of on-site high-voltage switch maintenance and high-voltage switch factory loop resistance testing in electric power and power supply departments.

      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