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ZEC-802C three-phase relay protection tester

The flexible combination type of voltage and current output has a standard 4-phase voltage and 3-phase current output, which can easily carry out various combination outputs for various types of protection tests. Each phase voltage can output 120V, current three can output 120A, the fourth phase voltage Ux is a multi-function voltage item, which can be set to 4 kinds of 3U0 or check the same period voltage, or any certain voltage value.

Key words:

voltage

output

current

ZBLQ-203B zinc oxide arrester charged tester

ZBLQ-203B zinc oxide arrester charged tester is a special instrument for testing the electrical performance of zinc oxide arrester, the instrument is suitable for various voltage levels of zinc oxide arrester charged or power failure detection, so as to timely find the equipment internal insulation moisture and valve aging and other dangerous defects.

Key words:

voltage

current

arrester

ZEHL-100A loop resistance tester

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

Key words:

resistance

power

current