Page 71 - Basic PD Theory
P. 71
Flow Charts
C
Yes Phase-to-phase
30° phase- PD
shifted?
60/120° Yes Cross-coupling
phase- PD
shifted?
6 pulses Yes Excitation
across the ac pulses
cycle?
0°/180° Yes Mechanical
phase vibration
position?
Yes Open-air
Clouds? arcing
66 | P ag e
