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Description:
transformer winding resistance meter circuit breaker tester is one of the necessary test items for delivery test, installation test and preventive test of electricity sector. It can effectively find the manufacturing defects such as material selection and welding of the transformer coil, looseness or missing share of the connecting parts, break wire of the connecting part etc.
High Precision
When measuring transformer winding resistance meter, it is important to remember that the inductor can hold a great deal of energy. This is why it is essential that the high and low-voltage test leads be disconnected before attempting to take a reading. A good winding resistance meter will be able to provide an accurate reading of the resistive value of a transformer by injecting a DC current into the transformer’s coil and then measuring the voltage drop in each coil. This allows the tester to skip the step of multiplication and division that would otherwise be required for this type of measurement.
Wide Measuring Range
Using an internal standard current shunt, it measures the DC voltage drop across each winding and calculates the resistance. Its wide measuring range provides the flexibility needed to measure the different windings of a transformer or the varying voltage regulator contact resistance. Unlike traditional testing methods that require the high-voltage and low-voltage leads to be disconnected from the circuit under test, this transformer winding resistance tester allows the current to flow through the shunt while maintaining the low-voltage and high-voltage connections to the control system.
Easy To Operate
The measurement of transformer winding resistance can help to detect defects such as open coils, severe mismatches and corroded connectors. These defects can result in power losses and electrical instability. Measuring the resistance of the windings can also help to determine the condition of the core. In order to measure resistance, the windings must be de-energized. This can be a time-consuming process and it is important to take safety precautions. It is important to understand that high-voltage leads should never be disconnected while current is flowing through them. This could cause a lethal voltage to develop across the point where the current breaks.
One way to speed up the testing process is to use an ohmmeter that can deliver high test currents. This will allow the resistance of the windings to be measured more quickly. It is also important to ensure that any stored magnetic energy is automatically discharged at the end of the testing process.
Short Circuit Protection
A short circuit breaker tester is a dangerous condition that can cause fires and electric shock. Signs of a short circuit include sparking, popping sounds, and burning smells. If you notice these signs, call a professional right away to repair the problem. A good transformer winding resistance meter circuit breaker tester will have a built-in short-circuit protection system to keep the worker safe. The protection system works by measuring the current of the test leads and judging whether it is above a certain threshold. If it is, the control IC will move the "DO" pin from high voltage to zero voltage and turn off Vi, which will cut off the discharge loop, triggering the short-circuit protection.
Conclusion
The transformer winding resistance meter is an electrical testing instrument used to measure the DC resistance of power transformers. It uses an internal standard current shunt to calculate the resistance without using lead resistance factors. The resistance test results should be compared with the original readings measured at the factory. These tests should not be a substitute for the regular testing of transformers in service.