Vacuum circuit breaker’s solenoid force evaluation 29/12/2009.

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Vacuum circuit breaker’s solenoid force evaluation 29/12/2009

Deliverable 1 Report on the compliance of the brand new trip coil and close coil to specification and their safety factors as derived from the laboratory experiments

EPE Switchgear -11 & 33KV Closing and Opening Coil 32 mm Pull gauge coil Stopper block Plunger Trip hook/strike

EPE solenoid Force and Stroke Relationship ! μ o is the Permeability of free space N is the number of coil turns A is the effective cross sectional i is the max current x is the stroke length of the plunger N.B. Data sheet of the coil attached in appendix ! A. E. Fitzgerald, Electric Machinery: The process, devices and systems of electromechanical energy conversion, McGraw Hill 1971

ETAH solenoid Force and Stroke Relationship ! μ o is the Permeability of free space N is the number of coil turns A is the effective cross sectional i is the max current x is the stroke length of the plunger N.B. Data sheet of the coil attached in appendix ! A. E. Fitzgerald, Electric Machinery: The process, devices and systems of electromechanical energy conversion, McGraw Hill 1971

Stroke length (x) mm Force in Kgf EPE Solenoid Force & Amps vs Plunger position

Force in Kgf TAMC) (ETAH) Solenoid Force & Amps vs Plunger position Stroke length (x) mm

Photo Gallery Force test for EPE 11KV New Solenoid testing

Force test for EPE 33KV Force test for TAMCO 11KV

Appendix – Solenoid Data Sheet

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