Delta 4000 Bedienerhandbuch PDF herunterladen (Seite 59)

Delta 4310 User Interface

81331 Rev 01 Nov 2010

Testing

When testing is ready to be performed, the test can be started by;

Right-click the desired blue highlighted test number

or press F2 when the actual test row is activated (highlighted in yellow)

or for Delta4310 press the “Test” button when the actual test row is activated

and click “Start” on the pop-up screen or press enter key to start generating the

test voltage.

The proper connections for the programmed tests are described below.

Bushing tests will only be performed on PT bushings that have test taps, usually

those rated 15kV and above. Hot collar tests are generally performed on HV

bushings that do not have test taps.

Transformer Overall Tests

Test 1 - This is a measurement of the overall insulation test on the PT primary

winding. Short H1 and H2 together and connect HV cable. Short secondary

windings X and Y together and connect Red or Blue lead. Test mode is GST-

GND.

Test 2 - Cross check test on the primary overall insulation. Remove shorting

lead on the primary winding. Connect HV cable to H1, Red lead to H2, and

Blue lead to X/Y. Test mode is GSTg-R.

Test 3 - Cross check test on the primary overall insulation. Connect HV cable

to H2, Red lead to H1, and Blue lead to X/Y. Test mode is GSTg-R.

NOTE Results of Test 2 added to Test 3 should be very close to Test 1 for

Capacitance, Current, and Watts.

Test 4 - Excitation current test of PT primary winding. Remove shorting leads

from all windings. Connect HV cable to H1, Red lead to H2, and connect one

end of each low voltage winding to ground. Test mode is UST-R.

Test 5 - Excitation current test of PT primary winding. Remove shorting leads

from all windings. Connect HV cable to H2, Red lead to H1, and connect one

end of each low voltage winding to ground. Test mode is UST-R.

NOTE: Test 4 and Test 5 duplicate the same test so results should be identical.

Test 6 - This is a repeat of Test 1 (same connections) only performed at 2kV (if

Test 1 was performed at 10kV).

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Delta 4000 Bedienerhandbuch Seite 59