Circuit breaker or contact system with a multi-range power suppl

Details Circuit breaker or contact system with a multi-range power suppl Circuit breaker or contact system with a multi-range power suppl

1997-10-23

1999-09-14

Nappi, Robert E.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

323324, 307129, H02H 712, G05B 2402, H01H 4720

Patent

active

059532211

ABSTRACT:
A multi-range power supply unit with an automatic switchover between ranges for different power supply voltages is disclosed for use with devices such as circuit breakers or contact systems. The power supply unit preferably has only two input connections for an input voltage range of approximately 20V-230V. Between the two input connections there is a rectifier circuit with a voltage stabilizing element, such as a Z-diode or equivalent device, connected in parallel. Connected in series to the rectifier circuit is a current divider. The current divider includes a capacitance and a thermistor. The thermistor preferably has a positive temperature coefficient (PTC). The power supply unit can be used for a power supply with DC voltage and for a power supply with AC voltage.

REFERENCES:
patent: 3978388 (1976-08-01), de Vries
patent: 4126793 (1978-11-01), De Vries
patent: 4802055 (1989-01-01), Beckrman
patent: 5539168 (1996-07-01), Linzenich

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