Megger Test Procedure

1) Winding Continuity testusing a standard ohmmeter

2) Star - Insulation testusing a megger with leads4,7 5,8 6,9 connected and checking to ground

3) Winding to Winding testusing a megger

Step #1 Winding Continuity Test

Procedure: With 4,7 5,8 6,9 connected together, perform a standard continuity test between 1,2 1,3 2,3 to make sure there are NO BLOWN OPEN windings within the motor.

NOTES:

Step #2 STAR - Insulation Leak Test

Procedure: Note: for safety you may keep the setting on ohms until ready to testWith 4,7 5,8 6,9 connected together, 1) connect green megger lead to a good solid motor ground 2) Connect RED lead to #1 then press 1000 voltRED test button 3) Move RED lead to #2 and repeat, and move RED lead to #3 and repeat the test RESULT: you are looking for HIGH MEG OHMS

Step #3 Winding-to-Winding Insulation Leak Test

Procedure: After connecting the windings as shown on the right , MEGGER as follows:1) a) Connect GREEN lead to T 7,8,9 and RED lead T 1,4 and do 1000V test b) Leave GREEN lead on T7,8,9 and RED lead T2,5 and do 1000V test c) Leave GREEN lead on T7,8,9 and RED lead T 3,6 and do 1000V test2) d) Connect GREEN lead to T 1,4 and RED lead T 2,5 and do 1000V test e) Connect GREEN lead to T 1,4 and RED lead T 3,6 and do 1000V test f ) Connect GREEN lead to T 2,5 and RED lead T 3,6 and do 1000V test

T 1,4

T 2,5

T 3,6

T 7,8,9