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Postato il 11/23/2022 : 02:32:58https://www.mktester.com/hv-switch-tester/contact-resistance-test-kit.htmlProduct Introduction#65306; At present conventional QJ44 type double-arm DC bridges are commonly used in power systems to measure contact resistance and the test current of such bridges is only mA level and it is difficult to find defects in reducing the cross-sectional area of the loop conductor. When measuring the contact resistance of the high-voltage switch conductive loop the measured value is several times larger due to the influence of the oil film and the oxide layer between the contacts and the contact resistance value cannot be truly reflected. To this end the latest Ministry of Power Standard DL/T845.4-2004 "General technical requirements for resistance measuring devices: loop resistance tester" and the new version of the verification procedures JJG1052-2009 "loop resistance tester straight resistance test procedures" made a measurement ( Isolation) The measuring current of the contact resistance of switches circuit breakers etc. is not less than DC 100A and the minimum current maintenance time is not less than 60S ensuring accurate test results.
Technical Parameters#65306;
Measuring range 0#65374;2999.9#956;#937; Resolution 0#65374;99.99#65292;0.01#956;#937; ; 100.0#65374;2999.9#65292;0.1#956;#937; Test current DC 50A 100A 150A 200A four-speed fixed output measurement accuracy ±(0.5% rd+2d) Continuous working time 5s#65374;599s Display method Large screen Chinese LCD display communication mode U disk dump Working power AC220V±10% 50Hz Total power 1200W Maximum storage record 200 working environment Temperature -10 ° C ~ 40 ° C humidity#65306;#8804;80%RH Dimensions 380×310×260 mm3 Weight 11kg(No attachments)
