The transformer voltage ratio refers to the ratio of the line voltage between the primary winding and the secondary winding during no-load operation. The purpose of measuring the transformer voltage ratio is to:1. Check the correctness of the turns ratio of the transformer winding.2. Check the condition of the tap.3.…

The use of a DC high-voltage generator for DC leakage testing is a comprehensive analysis of the insulation quality of the tested product based on the magnitude of the leakage current, the changes in leakage current during continuous boosting, and the stability of leakage current during boosting. The DC withstand…

1. Measuring voltage ratio: Currently, when measuring voltage ratio, the voltage used is lower than the working voltage of the bridge, and the current applied to the primary winding is also relatively small. The working magnetic flux generated in the iron core is very low, and sometimes it may not…

In the power system, transformers are an important type of power equipment, and their stability and reliability are crucial for ensuring the operation of the power grid. The transformer withstand voltage test is one of the important means to ensure its normal operation. However, when conducting transformer withstand voltage tests,…

The relay protection tester is a key equipment for the debugging, calibration, and maintenance of power system relay protection devices. Its usage must strictly follow the operating specifications to ensure testing accuracy and equipment safety. The following are detailed usage steps and precautions:1. Preparation before use① Equipment placement and groundingPlace…

The relay protection tester is a key equipment for debugging, verifying, and maintaining relay protection devices in power systems. Its main functions can be summarized as follows:1. Core functions① Fault simulation and testingFunction description: Simulate fault types such as short circuit, grounding, overload, and disconnection in power systems to verify…

Relay protection tester is a key equipment for the safe and stable operation of power systems, used to detect and verify the performance of relay protection devices. Below is an analysis from the aspects of working principle, technical parameters, application scenarios, industry standards, and development trends.1. Working principleThe relay protection…

The anti-interference dielectric loss tester is an important tool used in power systems to measure the dielectric loss tangent (tg δ) and capacitance (Cx) of high-voltage electrical equipment. To ensure the accuracy of measurement results and the safety of operators, the following precautions should be taken when using:1. Safety operation…

The common causes of faults in dielectric loss testers can be summarized as follows:1. Poor contact① Poor hook contact: When using a hook to connect the test sample during on-site measurement, if there is poor contact between the hook and the test sample, the discharge at the contact point will…

To easily deal with several major faults of high-voltage dielectric loss testers, you can start from the following aspects:1. Poor hook or ground contactPhenomenon: The test data fluctuates significantly, and the instrument may be protected.Reason: Poor contact between the hook and the test sample, or the presence of paint, rust,…