ABB GSB 245 Manuel technique - Page 7

Parcourez en ligne ou téléchargez le pdf Manuel technique pour {nom_de_la_catégorie} ABB GSB 245. ABB GSB 245 20 pages. Transformer bushings

T R A N S F O R M E R B U S H I N G S T Y P E G S B T E C H N I C A L G U I D E

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Testing

Routine testing

The bushing is routine tested according to

applicable standards. The tests include

measurement of partial discharge quantity, tan δ,

capacitance, and dry power frequency voltage

withstand test. The flange is separately tightness

tested with helium. A visual inspection is

performed and an individual routine test report is

issued with each bushing.

Type tests

Complete type tests have been performed and

reports are available on request.

Seismic qualification

GSB bushing with composite insulator have been

qualified in shake table tests for High

Performance Level IEEE 693-2005. Executed tests

also satifies seismic requirements for AG5 (0.5g)

of IEC TS 61463.

The outer conducting layer of the condenser body

is connected to the insulated test tap. During

operation the protective cap must be fitted to

ground the outer conducting layer to the flange.

The maximum test voltage is 2 kV, 50 Hz for

1 minute. The maximum service voltage is 600 V.

Voltage tap, U

For permanent connection of the test tap to

measuring circuits, a test tap adapter is

sometimes required, for example if the IEEE

dimension standard for measuring tap is not

used.

= 6 kV, available as option.

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02 Test tap.

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03 Test tap adapter.