Table of Contents
What is the purpose of HV test?
High Voltage testing is usually performed to qualify the device to operate safely during rated electrical conditions, a way to check the effectiveness of its insulation. The objective sought during the high voltage testing will determine the type and amount of voltage applied and the acceptable current flow.
How do you test HV switchgear?
The electrical switchgear may be tested with AC or DC voltage to check the condition of the insulation of switchgear and circuit breakers….AC Hi-Pot Test.
| Rated Operating Voltage | AC Factory Proof Test (V) | AC Test Maintenance Values (V) |
|---|---|---|
| 13,800 | 36,000 | 27,000 |
| 14,400 | 50,000 | 37,500 |
| 23,000 | 60,000 | 45,000 |
| 34,500 | 80,000 | 60,000 |
How do you measure 11kv voltage?
11 kV is obtained by stepping up a normal 230 V using step-up transformer. In a step up transformer, though the output voltage is high, current delivered to the load is low as compared to the normal 230V system.
What is DC test in electrical?
DC testing checks for potential contaminants, dirt, and moisture, piled up on circuit breakers. Their insulation systems weaken owing to the heat caused by arch disruption, particularly if are regularly maintained.
What is IR testing?
An insulation resistance (IR) test measures the total resistance between any two points separated by electrical insulation. Such tests are useful for checking the quality of insulation, not only when a product is first manufactured but also over time as the product is used.
How do you test 11KV transformer?
Induced Over voltage Withstand test (DVDF test) This test checks the inter turn insulation. For a 11KV/433V transformer,866 Volts are applied at the 433V winding with the help of a Generator for 1 minute. This induces 22KV on 11KV side.
How do you test 11KV cable?
Test on 11kV and 33kV Cables between Cores and Earth For three core belted cables, the test on any core shall be conducted between the core and lead sheath with the remaining two cores connected to earth.
What is high voltage detector?
The High Voltage Detector is a safety device used to verify that the overhead line is not LIVE prior to Earthing. The HV Detector starts annunciation with flashing Red LED’s and buzzer beeps indicating that the line is LIVE and not safe to earth and carry any operations.