Power connect safety and connection interlock

Details Power connect safety and connection interlock Power connect safety and connection interlock

1990-03-21

1992-03-24

Pellinen, A. D.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

307246, 307109, 307135, 307147, 361187, 439924, 439133, H02J 700, H01R 1344

Patent

active

050991876

ABSTRACT:
A power connect safety and connection interlock system is shown for use with inverters and other DC loads (16) which include capacitor filter banks (14) at their DC inputs. A safety circuit (20) operates a spring (26) biased, solenoid (22) driven mechanical connection interference (24) which prevents mating and therefore electrical connection between the power contactor halves (11, 13) of the main power contacts (12) until the capacitor bank is safely precharged through auxiliary contacts (18). When the DC load (16) is shut down, the capacitor bank (14) is automatically discharged through a discharging power resistor (66) by a MOSFET transistor (60) through a discharging power resistor (66) only when both the main power contacts and auxiliary contacts are disconnected.

REFERENCES:
patent: 3935511 (1976-01-01), Boulanger et al.
patent: 3935527 (1976-01-01), Michelet et al.
patent: 4031559 (1977-06-01), Peters
patent: 4208708 (1980-06-01), Abraham et al.
patent: 4405975 (1983-09-01), Overstreet et al.
patent: 4845593 (1989-07-01), Brown et al.
patent: 4982306 (1991-01-01), Koroncai et al.

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