Delta 4000 Instruction Manual download pdf (Page 60)

81331 Rev 01 Nov 2010

Supplemental Tests

Test 7 - This tests the inter-winding insulation between primary (H) and

secondary (X). Short H1 to H2 and short X and Y windings to themselves.

Connect HV cable to H, Red lead to X and Blue lead to Y. Test mode is UST-R.

Test 8 - This tests the inter-winding insulation between primary (H) and

secondary (Y). Short H1 to H2 and short X and Y windings to themselves.

Connect HV cable to H, Red lead to X and Blue lead to Y. Test mode is UST-B.

Test 9 - This is a cross check test. Remove shorting lead from H1/H2.

Connect HV lead to H1. Short X and Y windings together and connect to H2.

Connect Red lead to H2. Test mode is Test mode is GSTg-R.

Test 10 - This is a cross check test. Remove shorting lead from H1/H2.

Connect HV lead to H2. Short X and Y windings together and connect to H1.

Connect Red lead to H1. Test mode is Test mode is GSTg-R.

Bushing Tests

Test 11 - This is the test of the C1 insulation on the H1 bushing (only performed

if the bushing has a capacitance tap). All shorting leads must be removed. HV

lead is connected to H1 and Red lead is connected to the test tap. Test mode is

UST-R.

Test 12 - This is the test of the C1 insulation on the H2 bushing (only performed

if the bushing has a capacitance tap). All shorting leads must be removed. HV

lead is connected to H2 and Red lead is connected to the test tap. Test mode is

UST-R.

CAUTION

Bushing test taps have very limited insulation and should

generally be energized at reduced voltage levels. If the PT or

bushing manufacturer does not specify a test voltage level

use no more than 500 volts (0.5kV).

Test 13 - This is the test of the C2 insulation on the H1 bushing (only performed

if the bushing has a capacitance tap). All shorting leads must be removed. HV

lead is connected to the test tap and Red lead is connected to the H1 bushing.

Test mode is GSTg-R.

Test 14 - This is the test of the C2 insulation on the H2 bushing (only performed

if the bushing has a capacitance tap). All shorting leads must be removed. HV

lead is connected to the test tap and Red lead is connected to the H2 bushing.

Test mode is GSTg-R.

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 107 108

No comments

Delta 4000 Instruction Manual Page 60