Testing Of Insulators And Bushings Ppt

To ensure the desired performance of an electrical insulator that is for avoiding unwanted insulator failure each insulator has to undergo numbers of insulator test.

Testing of insulators and bushings ppt.

Has a long term experience in insulators testing. We have a long track record and deep range of skills as well as a portfolio of pollution and salt fog test facilities. There should be no mechanical failure of the insulator. The upand down test method was used to obtain the u50 flashover voltages and each voltage test was performed on a new polluted insulator.

View testing of insulators and bushings ppts online safely and virus free. Nowadays providing accredited testing mainly on a commercial basis for customers from all over the world. The bushing nameplate should list the tap capacitance and power factor of the c2 insulation. 2 1 rated voltage u r 300 kv capacitance tan δ and pd are measured at each voltage as detailed in section 2 3.

Egu hv laboratory a s. After finishing the first series of tests without recovery of hydrophobicity the insulators were polluted in the same way but left for 2 days before the voltage test. High voltage test this test is usually carried out for pin insulators. Corrosion test of insulator in corrosion test of insulator 1.

In this test the insulator is inverted and placed into the water up to the neck. Routine tests of insulators. In addition a power frequency test of the test tap insulation is made on all bushing. Kema labs is the global leader in testing insulators and bushing to most existing standards.

Insulator is suspended into a copper sulfate solution for 1 min. Before going through testing of insulator we will try to understand different causes of insulator failure because insulator testing ensures the quality of electrical insulator and chances for failure of insulation depend upon. The spindle hole is also filled with water and a high voltage is applied for 5 minutes. Get ideas for your own presentations.

Bushings are an integral component of high voltage machines. Routine tests mechanical routine test. If a bushing insulator has a large chip that reduces the flashover distance or has a large crack totally through the insulator the bushing should be immediately replaced. 2 test sequences bushing routine tests are depending on if the rated voltage u r is below or above 300 kv.

A bushing is used to bring high voltage conductors through the grounded tank or body of the electrical equipment without excessive potential gradients between the conductor and the edge of the hole in the body. High voltage bushings are usually equipped with a tap for test measurements. Testing of bushings. This includes one of the biggest salt fog chambers ever built which can test up to 600 kv dc and ac.

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