JPS5697883A - Detector for defective contact relay - Google Patents

Detector for defective contact relay

Info

Publication number
JPS5697883A
JPS5697883A JP17173679A JP17173679A JPS5697883A JP S5697883 A JPS5697883 A JP S5697883A JP 17173679 A JP17173679 A JP 17173679A JP 17173679 A JP17173679 A JP 17173679A JP S5697883 A JPS5697883 A JP S5697883A
Authority
JP
Japan
Prior art keywords
circuit
contact relay
contact
defective
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP17173679A
Other languages
Japanese (ja)
Other versions
JPH0128349B2 (en
Inventor
Akira Shimajiri
Takasaku Sagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP17173679A priority Critical patent/JPS5697883A/en
Publication of JPS5697883A publication Critical patent/JPS5697883A/en
Publication of JPH0128349B2 publication Critical patent/JPH0128349B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

PURPOSE: To detect a defective automatically and securely by wiring a switching circuit to one oscillating circuit while connecting a DC power source to the other, and by connecting the coil-side receiving circuit of a contact relay to be measured to a DC or AC power source.
CONSTITUTION: Contact relay T, an object to be measured, is equipped to receiving circuit M at the side of its contact relay coil, the commercial power source is connected to AC power circuit a1, and AC power switch PB1 is closed. In oscillating circuit B, when ultra-low frequency oscillating circuit b1 generates its output from DC power circuit a2, switching circuit S feeds no current, coil T1 of contact relay T is not energized, and consequently contact T2 never operates, so that the contact relay is normal, defective detecting and displaying circuit L will not be in operation. On the other hand, when ultra-low frequency oscillating circuit b1 generates no output, display circuit L is not in operation either. If the contact relay is defective, the part of contact resistance detecting circuit (h) increases in resistance and display circuit L operates. Therefore, this constitution can detect defectives automatically and securely.
COPYRIGHT: (C)1981,JPO&Japio
JP17173679A 1979-12-29 1979-12-29 Detector for defective contact relay Granted JPS5697883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17173679A JPS5697883A (en) 1979-12-29 1979-12-29 Detector for defective contact relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17173679A JPS5697883A (en) 1979-12-29 1979-12-29 Detector for defective contact relay

Publications (2)

Publication Number Publication Date
JPS5697883A true JPS5697883A (en) 1981-08-06
JPH0128349B2 JPH0128349B2 (en) 1989-06-02

Family

ID=15928722

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17173679A Granted JPS5697883A (en) 1979-12-29 1979-12-29 Detector for defective contact relay

Country Status (1)

Country Link
JP (1) JPS5697883A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63152568U (en) * 1987-03-25 1988-10-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63152568U (en) * 1987-03-25 1988-10-06

Also Published As

Publication number Publication date
JPH0128349B2 (en) 1989-06-02

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