Title:
保護リレー
Document Type and Number:
Japanese Patent JP2004507994
Kind Code:
A
Abstract:
A protective relay is provided to protect circuitry against reverse battery polarity or load dump, wherein a relay coil is operatively connected to a contact switch and is fed by a reverse bias diode (which may be a Zener diode) such that the relay coil opens the switch contact when the diode is energized to protect the circuitry; wherein the protective relay optionally includes a positive temperature coefficient resistor or a current source to protect the relay coil from overheating.
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Inventors:
De Oliveiro, Roberto Pinto
Application Number:
JP2002522041A
Publication Date:
March 11, 2004
Filing Date:
August 24, 2001
Export Citation:
Assignee:
Tyco Electro Electronica Limiter
International Classes:
H02H5/04; H02H11/00; H02H9/02; (IPC1-7): H02H11/00; H02H5/04
Domestic Patent References:
| JPH10336905A | 1998-12-18 | |||
| JPH10280980A | 1998-10-20 | |||
| JPS6251186U | 1987-03-30 | |||
| JP2000188826A | 2000-07-04 |
Attorney, Agent or Firm:
Tyco Electronics Amplifier Co., Ltd.