How to use DEMIKS transformer dielectric loss factor tester

Preparation before testing

1. Check whether the appearance of the tester is damaged and whether the components are firmly connected.

2. Ensure that the power supply of the tester is normal and select the appropriate power supply method according to the on-site power supply conditions.

3. Fully discharge the transformer to be tested to ensure safety, and reliably isolate the transformer's tested winding from other windings and the ground.

4. Clean the test terminals of the transformer and remove impurities such as oil and dust on the surface to ensure good test contact.

Connect the tester

1. Connect the high-voltage lead of the tester to the high-voltage end of the transformer's tested winding, ensuring that the connection is firm and the contact is good.

2. Connect the test lead of the tester to the low-voltage end or neutral point of the transformer's tested winding, and reliably ground the ground lead of the tester.

Parameter setting of transformer dielectric loss factor tester

1. Set the corresponding test voltage, test frequency and other parameters on the tester according to the voltage level, capacity and other parameters of the transformer to be tested. In general, the test voltage should be selected according to relevant standards or test requirements, and the test frequency is usually 50Hz or other specific frequencies.

2. Set other parameters of the tester, such as measurement range, accuracy, etc., to ensure that the settings of the tester match the actual situation of the transformer being tested.

Test the dielectric loss factor of the transformer

1. After confirming that the connection and parameter settings of the tester are correct, start the tester and start the test. The tester will automatically apply the test voltage and measure parameters such as the dielectric loss factor and capacitance of the transformer.

2. During the test, pay attention to the display data and status of the tester to ensure that the test process is normal. If there is an abnormal situation, such as the tester alarm, data abnormality, etc., the test should be stopped immediately, the cause should be found and the fault should be eliminated before retesting.

Post-test processing

1. After the test is completed, turn off the power of the tester, wait for the high-voltage output of the tester to completely disappear, and then remove the test lead.

2. Record and analyze the test data to determine whether the insulation condition of the transformer is good. If the dielectric loss factor exceeds the range specified by the standard, the cause should be further analyzed and the transformer should be further inspected and tested if necessary.

3. Clean up the test site and keep the tester and test tools properly for next use.

The specific operation of transformer dielectric loss factor testers (also called as Transformer Tand Delta Tester) of different models and manufacturers may vary. When using, you should read the instruction manual of the tester in detail and test in strict accordance with relevant standards and operating procedures. If you need, you can consult the sales staff of Shanghai Demix Electric Technology. For more power test equipment, please visit the website: www.electrichv.com