EP0320928A3 - Device for detecting differential currents in electric systems - Google Patents

Device for detecting differential currents in electric systems Download PDF

Info

Publication number
EP0320928A3
EP0320928A3 EP88120978A EP88120978A EP0320928A3 EP 0320928 A3 EP0320928 A3 EP 0320928A3 EP 88120978 A EP88120978 A EP 88120978A EP 88120978 A EP88120978 A EP 88120978A EP 0320928 A3 EP0320928 A3 EP 0320928A3
Authority
EP
European Patent Office
Prior art keywords
pin
switch
release lever
coupling
contact
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.)
Withdrawn
Application number
EP88120978A
Other languages
German (de)
French (fr)
Other versions
EP0320928A2 (en
Inventor
Raffaello Monterosso
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.)
ABB Elettrocondutture SpA
Original Assignee
Elettrocondutture SpA
ABB Elettrocondutture SpA
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 Elettrocondutture SpA, ABB Elettrocondutture SpA filed Critical Elettrocondutture SpA
Publication of EP0320928A2 publication Critical patent/EP0320928A2/en
Publication of EP0320928A3 publication Critical patent/EP0320928A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages

Abstract

This device, eclosed in a box-like body (1) associable with conventional switches (2) of the movable-contact type, comprises at least one pin (5) protruding from the container body and subject to translatory motion upon the onset of differential current in the electric system, said pin (5) being accommodated, after the coupling of the device to a switch, within a port (11) provided in the coupling wall of said switch. In the coupled position the pin is arranged substantially in contact with the contact release lever (6) of the switch. The movable pin is guided, in its releasing and resetting strokes along first cam guides (13) provided in the walls of the container body, while second cam guides (16) are provided having such a path as to allow the pin (5) to pass below the release lever (6) and then assume its correct resetting position, thus allowing the coupling operation without errors in positioning the pin (5) with respect to the release lever (6).
EP88120978A 1987-12-17 1988-12-15 Device for detecting differential currents in electric systems Withdrawn EP0320928A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23071/87A IT1223522B (en) 1987-12-17 1987-12-17 DIFFERENTIAL CURRENT DETECTOR DEVICE IN ELECTRICAL SYSTEMS, STRUCTURED IN A WAY TO BE COUPLED, IN A CLOSED POSITION, TO NORMAL SWITCHES WITHOUT DANGER OF ACCIDENTAL ASSEMBLY ERRORS
IT2307187 1987-12-17

Publications (2)

Publication Number Publication Date
EP0320928A2 EP0320928A2 (en) 1989-06-21
EP0320928A3 true EP0320928A3 (en) 1990-08-29

Family

ID=11203472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120978A Withdrawn EP0320928A3 (en) 1987-12-17 1988-12-15 Device for detecting differential currents in electric systems

Country Status (2)

Country Link
EP (1) EP0320928A3 (en)
IT (1) IT1223522B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784940A (en) * 1972-09-15 1974-01-08 Federal Pacific Electric Co Circuit breaker with overcurrent and auxiliary releases
US3858130A (en) * 1973-12-04 1974-12-31 Westinghouse Electric Corp Ground fault circuit breaker with cold temperature bimetal constriction
FR2295553A1 (en) * 1974-12-17 1976-07-16 Saparel Circuit breaker for consumer - uses single unit in multiple format with arc extinction and optional trips
FR2373145A1 (en) * 1976-12-01 1978-06-30 Licentia Gmbh Combined fault current and multi-pole line protector - has summation transformer in multi-section housing with cut=out mechanism
EP0196241A1 (en) * 1985-02-27 1986-10-01 Merlin Gerin Single pole and neutral differential circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784940A (en) * 1972-09-15 1974-01-08 Federal Pacific Electric Co Circuit breaker with overcurrent and auxiliary releases
US3858130A (en) * 1973-12-04 1974-12-31 Westinghouse Electric Corp Ground fault circuit breaker with cold temperature bimetal constriction
FR2295553A1 (en) * 1974-12-17 1976-07-16 Saparel Circuit breaker for consumer - uses single unit in multiple format with arc extinction and optional trips
FR2373145A1 (en) * 1976-12-01 1978-06-30 Licentia Gmbh Combined fault current and multi-pole line protector - has summation transformer in multi-section housing with cut=out mechanism
EP0196241A1 (en) * 1985-02-27 1986-10-01 Merlin Gerin Single pole and neutral differential circuit breaker

Also Published As

Publication number Publication date
EP0320928A2 (en) 1989-06-21
IT1223522B (en) 1990-09-19
IT8723071A0 (en) 1987-12-17

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