Ehv substation design pdf

How to join us ? Allocation Ehv substation design pdf in multi-party andor cross-jurisdiction .

PCORE Test Terminal Calculator – How much money could Test Terminals save you? The PCORE Test Terminal makes it possible to perform field dielectric tests of substation equipment such as transformers and circuit breakers faster, more safely, and at substantial savings. The PCORE Test Terminal functions as an electrical switch permanently connected in series between the power bus and the equipment to be tested, so it eliminates the need to physically remove the power bus during testing. In the closed position, the PCORE Test Terminal permits electrical power to be transferred from the power bus to the equipment.

When you wish to test the equipment, you first de-energize the power bus. Then you back off the two captive bolts at the top of the PCORE Test Terminal and loosen the other bolts to let the terminal’s copper blades swing out in an open position. With the bus grounded, the equipment is now isolated from the power bus and you may perform standard Doble or other dielectric tests. During testing, the equipment is energized by the high voltage cable from the Doble test set, and the center casting of the terminal is connected to the test set’s “guard” so any stray leakage current is bypassed and returned to the test set without being measured.

Loosening and tightening the bolts on the test terminal and connecting the terminal to the test set takes only a matter of minutes. What’s more, depending on the equipment you’re testing and its location, testing can often be accomplished without a boom or bucket truck, or extra personnel. If you extend the service life of existing substation equipment without performing periodic field dielectric tests, you face the risk that the equipment will fail electrically, resulting in expensive downtime, lost revenue, and costly repair and replacement. On the other hand, if you perform periodic field dielectric tests to ensure that your equipment doesn’t fail but you haven’t installed PCORE Test Terminals, your testing costs can be significant. Because PCORE Test Terminals make it so easy to test the dielectric strength of your substation equipment, they let you extend the equipment’s service life without these added risks and testing costs. By eliminating the need to physically disconnect the equipment being tested from the power bus, PCORE Test Terminals significantly reduce labor costs and boom and bucket truck time.

The text, table, and graph on the next page can help you determine the savings you can expect when you install PCORE Test Terminals at your utility. Because the PCORE Test Terminal makes it possible to isolate virtually any substation equipment from its power bus without physically removing the power bus, it eliminates the risk of equipment damage that’s otherwise associated with testing. The PCORE Test Terminal improves safety by minimizing boom and bucket truck crews’ time. Because the PCORE Test Terminal facilitates field dielectric testing compared with testing that requires removal of the power bus, it reduces equipment downtime and maximizes equipment on-line time delivering valuable electrical power. The PCORE Test Terminal is easy to use.