Power factor measuring cut-off arrangement for and method of pro

Details Power factor measuring cut-off arrangement for and method of pro Power factor measuring cut-off arrangement for and method of pro

1982-05-26

1984-09-25

Dixon, Harold

Electric lamp and discharge devices: systems

With automatic shunt and/or cutout

315247, 315308, H05B 3700

Patent

active

044737793

ABSTRACT:
A cycling cut-off arrangement protects a ballast-starter circuit of a luminaire of the type having a high pressure sodium lamp from damage in the event of a cycling malfunction by sensing the change in power factor across the lamp during cycling, and disabling the ballast-starter circuit from its power source once cycling has been reliably detected. The method of sensing the power factor change, and of disabling the ballast-starter circuit is also disclosed, as well as a method of installing the arrangement on the luminaire with minimum retro-fitting required.

REFERENCES:
patent: 4207500 (1980-06-01), Duve et al.
patent: 4356433 (1982-10-01), Linden
patent: 4399392 (1963-08-01), Buhrer

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