How to use Solenoid and Piezoelectric in Circuit Breakers

Solenoid and Piezoelectric in Circuit Breakers

The waveform of arc voltage and contact
position when the contact opening velocity
of 1 m/s, using solenoid and piezoelectric as
mechanism to open the contacts, as shown in
Figure 8.4.

From figure 8.5, on the 1 m/s moving
contact, the anode moves rapidly 2.5 mm
after 1 m/s at a contact gap of 0.6 mm, after
this movement the anode root remains static
for 2ms until the arc transfers rapidly away
from the contact region, at a contact gap of
2.5 mm.

Reference: Piezoelectrics in Circuit Breakers: Design & Test by Dr Kesorn Pechrach Weaver PhD