21-04-2012, 05:16 PM
A REVOLUTION IN CIRCUIT BREAKER OPERATING MECHANISM TECHNOLOGY
1.ppt (Size: 4.02 MB / Downloads: 94)
Why do we have Circuit Breakers?
To switch transmission lines, transformers, cables, busbars etc.
Frequent switching of capacitor banks and reactor banks
To open an electrical circuit
To close/reclose an open circuit
And of course the most important to clear a fault to protect equipment and human life!
Operating Mechanism Technology Trends
Spring operating mechanisms employed since the 1930’s
Some manufacturers traditionally focused on pneumatic or hydraulic operating mechanisms
Current manufacturer trend towards spring operating mechanisms
Motor Drive: Concept to product
By 1996, further gains in electronics & electromagnet technology
HV applications now a realistic possibility
Decision to pursue concept
1998 sees first prototype verification tests
Proves concept is feasible
Product development begins