Do you know the measurement method of the loop resistance tester? The loop resistance tester, also known as the transformer loop resistance tester, is mainly used to test the contact resistance of the dynamic and static contacts of the high-voltage circuit breaker. The conductive loop resistance of the circuit breaker mainly depends on Do you know the measurement method of the loop resistance tester? The loop resistance tester, also known as the transformer loop resistance tester, is mainly used to test the contact resistance of the dynamic and static contacts of the high-voltage circuit breaker. The conductive loop resistance of the circuit breaker mainly depends on Due to the contact resistance of the dynamic and static contacts, the existence of the contact resistance increases the loss of the conductor when it is energized, which increases the temperature at the contact point. The ability to cut off short-circuit current is also an important data reflecting the quality of installation and maintenance work. At present, there are three main test methods of the loop resistance tester. The specific operations are as follows: Do you know the measurement method of the loop resistance tester? The loop passes through a weak current, and it is difficult to eliminate the oxide film with high resistance. The measured resistance value is too large, and due to the small current, it is difficult to form shrinkage at the contact point of the contact, so the shrinkage resistance cannot be measured. 2. Voltage drop method: When a DC current is applied to the circuit under test, a voltage drop will be generated on the contact resistance of the circuit, the current value and voltage value passing through the circuit are measured, and the contact resistance is calculated.
The test process is cumbersome, and there are certain errors in the manual calculation of the measurement results. 3. Micro-ohmmeter method (loop resistance tester): The principle is the principle of voltage drop, but the measurement, calculation and other aspects are all processed by single-chip microcomputer, which greatly reduces the workload. Do you know the measurement method of loop resistance tester? Loop resistance tester Shenzhen Noyafa Electronic Technology Co., Ltd.
