High Voltage Testing of Electrical Apparatus

High Voltage Testing of Electrical Apparatus:

Classification of High Voltage Testing Methods : Classification of High Voltage Testing Methods are divided into two groups: Power Frequency Withstand Voltage Impulse withstand voltage Tests These tests together ensure the over voltage withstand capability of an apparatus. The Basics Terminology techniques of the technical terms are discussed here. In test codes and standard specifications, certain technical terms are used to …


High Voltage Test Bushings : High Voltage Test Bushings Consisting of Three tests, namely Power Frequency Tests Impulse Voltage Tests Thermal Tests Power Frequency Tests: Power Factor—Voltage Test: In this test, the bushing is set up as in service or immersed in oil. It is connected such that the line conductor side of the high voltage Schering bridge. Voltage is applied up to …


High Voltage Test on Cables : Cables are very important electrical apparatus for transmission of electrical energy by underground means. They are also very important means for transmitting voltage signals at High Voltage Test on Cables. For power engineers, large power transmission cables are of importance, and hence testing of power cables only is considered here. Of …


High Voltage Test on Circuit Breaker and Isolators : High Voltage Test on Circuit Breaker and Isolators is covered, giving common characteristics for both. While these characteristics are directly relevant to the testing of circuit breakers, they are not much relevant as far as the testing of isolators are concerned since isolators are not used for interrupting …


High Voltage Test on Insulators : The High Voltage Test on Insulators that are normally conducted are usually subdivided as Type tests and The routine tests. Type tests are intended to prove or check the design features and the quality. The routine tests are intended to check the quality of the individual test piece. Type tests are done …


High Voltage Test on Radio : Many electrical apparatuses like transformers, line conductors, rotating machines, etc. produce unwanted electrical signals in the radio and high frequency (television band, microwave bands, etc.) ranges. These signals arise due to corona discharges in air, internal or partial discharges in the insulation, sparking at commutators and brush gear in rotating machines, …


High Voltage Test on Transformer : High Voltage Test on Transformer are very important and costly apparatus in power systems. Great care has to be exercised to see that the transformers are not damaged due to transient overvoltages of either lightning or power frequency. Hence, overvoltage tests become very important in the testing of transformers. Here, only …


High Voltage Testing of Surge Arrester : In modern practices, surge arrester or lightning arresters are the most reliable apparatus to protect the power system against transient voltages due to lightning and switching surges. They are invariably used from distribution voltages (400 V) to highest system transmission voltages of 765 kV or above. Hence, testing them precisely …