The difference between DC resistance tester and loop resistance tester
DC resistance test of transformer winding transformer is in transition, overhaul and change switch, test items essential to the.WDHL series circuit resistance tester adopts advanced high-power switching power supply technology and advanced electronic circuit and refined. It is a special testing instrument for high and low switch, cable, wire and welding seam contact resistance.
Loop resistance tester: the test current is generally in the 100A and 200A, used for measuring high voltage switch and loop resistance load switches, directly reflect the contact switch contact, using 100A or 200A test current can be avoided due to effect of the oil film and the dynamic and static contacts between the oxide layer, the measured resistance too many times, the true value of loop resistance cover.
DC low resistance tester: the test current is less than or equal to 1A, mainly used for contact resistance, on resistance, connection resistance, and so on. All kinds of low resistance measurement, the accuracy is very high, the maximum can be 0.01%.
