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Title:
REVERSE CONNECTION PROTECTIVE CIRCUIT
Document Type and Number:
Japanese Patent JP2000333366
Kind Code:
A
Abstract:

To enhance maintainability by providing a power supplying means provided with a switch which interrupts the conductor of either of a positive power line and a negative power line according to an incoming control signal, and a reverse connection monitoring means which outputs a control signal to interrupt a conductor containing a switch of the positive and negative power lines.

A monitoring circuit portion 8, a switch portion 15, and a diode 11 for preventing currents extending from a power circuit portion 6, are placed in the positive power line 9 of a power circuit portion 5. The diode 11 is connected with the switch portion 15 on the anode side and with a load 7 on the cathode side. The monitoring circuit portion 8, the switch portion 15, and a coil 17 are placed in a negative power line 10. The switch portion 15 is normally in ON state, and is turned OFF only when terminals 3a are reversely connected. The monitoring circuit portion 8 is connected between the power circuit portion 5 and a power circuit portion 6. Since it is unnecessary to replace a part after reverse connection as a result, a power supply with high maintainability is obtained.


Inventors:
OBA HIROAKI
Application Number:
JP13743999A
Publication Date:
November 30, 2000
Filing Date:
May 18, 1999
Export Citation:
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Assignee:
NEC SAITAMA LTD
International Classes:
H02H3/18; H02H11/00; H02J1/00; H02J1/10; H02M1/00; (IPC1-7): H02J1/00; H02H3/18; H02M1/00
Domestic Patent References:
JPH10336905A1998-12-18
JPH0865918A1996-03-08
Attorney, Agent or Firm:
Jo Hori