Title:
OVERCURRENT PROTECTIVE CIRCUIT
Document Type and Number:
Japanese Patent JP3144366
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an overcurrent protective circuit by which a circuit to be protected can be protected surely from not only an overvoltage but also from an overcurrent, which has a function of notifying an abnormal states, and furthermore, which is able to automatically restore the circuit to be protected to a normal state after the overcurrent disappears.
SOLUTION: A current detecting means 7 which detects the application of an overcurrent, a means 6 which limits the overcurrent, means 8 and 9 which monitor the application of the overcurrent, control means 10, 11, 12, 13 and 15 which cut off and retore automatically a protection object circuit, means 5A and 5B which cut off the protection object circuit, and at the same time, short-circuit an overvoltage protective device to protect it from burning due to the overcurrent are provided. Furthermore, a means 14 which displays the operation of the overcurrent protective circuit is included.
Inventors:
Takeshi Sasaki
Application Number:
JP34404097A
Publication Date:
March 12, 2001
Filing Date:
November 28, 1997
Export Citation:
Assignee:
NEC
International Classes:
H02H3/08; H02H3/06; H02H9/04; (IPC1-7): H02H3/06; H02H9/04
Domestic Patent References:
| JP63293115A | ||||
| JP878631A | ||||
| JP515056A | ||||
| JP9308093A | ||||
| JP4229020A | ||||
| JP514941A | ||||
| JP6450632U |
Attorney, Agent or Firm:
Asamichi Kato