JPS5475501A - Shaft current detector - Google Patents

Shaft current detector

Info

Publication number
JPS5475501A
JPS5475501A JP14277877A JP14277877A JPS5475501A JP S5475501 A JPS5475501 A JP S5475501A JP 14277877 A JP14277877 A JP 14277877A JP 14277877 A JP14277877 A JP 14277877A JP S5475501 A JPS5475501 A JP S5475501A
Authority
JP
Japan
Prior art keywords
current
insulator
shaft
shaft current
switching device
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.)
Pending
Application number
JP14277877A
Other languages
Japanese (ja)
Inventor
Nobuyuki Marui
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14277877A priority Critical patent/JPS5475501A/en
Publication of JPS5475501A publication Critical patent/JPS5475501A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detct a shaft current continuously in operation from the outside by conducting the shaft current of a rotary shaft with a carbon brush to a current detecting stage and detecting the shaft current with a current indicating means.
CONSTITUTION: A brush 4 is contacted to an end of a rotary shaft 1 supported with a base 7 through an insulator 6 and connected to a gate of an electronic switching device 8 through a diode for stopping a reverse current and the cathode of the device 8 is connected to a counter side of the base 7 of the insulator 6. The anode of the switching device is connected to a resistor 9, a relay 10 and a positive terminal of a power supply 11 in seriese and a negative terminal of the power supply 11 is connected to the cathode of the switching device to make a current detection circuit 5. The device 8 is not conducted because of a high resistance of the insulator 6 but deterioration of the insulator allows to reach a shaft current to a set point, to conduct the device 8 and to operate a current indicator with a relay 10.
COPYRIGHT: (C)1979,JPO&Japio
JP14277877A 1977-11-30 1977-11-30 Shaft current detector Pending JPS5475501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14277877A JPS5475501A (en) 1977-11-30 1977-11-30 Shaft current detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14277877A JPS5475501A (en) 1977-11-30 1977-11-30 Shaft current detector

Publications (1)

Publication Number Publication Date
JPS5475501A true JPS5475501A (en) 1979-06-16

Family

ID=15323362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14277877A Pending JPS5475501A (en) 1977-11-30 1977-11-30 Shaft current detector

Country Status (1)

Country Link
JP (1) JPS5475501A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040049914A (en) * 2002-12-05 2004-06-14 계양전기 주식회사 Auto-testing apparatus for insulation of a/r molding shaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040049914A (en) * 2002-12-05 2004-06-14 계양전기 주식회사 Auto-testing apparatus for insulation of a/r molding shaft

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