WO2013076377A1 - Residual current device - Google Patents

Residual current device Download PDF

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Publication number
WO2013076377A1
WO2013076377A1 PCT/FI2012/051167 FI2012051167W WO2013076377A1 WO 2013076377 A1 WO2013076377 A1 WO 2013076377A1 FI 2012051167 W FI2012051167 W FI 2012051167W WO 2013076377 A1 WO2013076377 A1 WO 2013076377A1
Authority
WO
WIPO (PCT)
Prior art keywords
residual current
knob part
switch
trip
current device
Prior art date
Application number
PCT/FI2012/051167
Other languages
French (fr)
Inventor
Mikko Jokela
Original Assignee
Etherma Skandinavia Oy
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 Etherma Skandinavia Oy filed Critical Etherma Skandinavia Oy
Priority to EP12851980.8A priority Critical patent/EP2783382A4/en
Publication of WO2013076377A1 publication Critical patent/WO2013076377A1/en

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
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/58—Manual reset mechanisms which may be also used for manual release actuated by push-button, pull-knob, or slide
    • 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
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/006—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits the coupling part being secured to apparatus or structure, e.g. duplex wall receptacle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • H02H3/167—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass combined with other earth-fault protective arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/046—Means for indicating condition of the switching device exclusively by position of operating part, e.g. with additional labels or marks but no other movable indicators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
    • H01H73/42—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by rotatable knob or wheel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems

Definitions

  • the current invention relates to residual current devices.
  • the current invention relates more particularly to the residual current devices used in sockets and other electrical installation devices, such as in underfloor heating thermostats.
  • a socket-based residual current device is a socket having a residual current safety switch that protects an electrical device connected to it and people in the proximity of it from dangerous electric shocks by causing in a residual current situation the tripping of one or more contacts.
  • a residual current device operates such that in a normal situation in a single- phase circuit the electric current coming from a phase conductor returns via the neutral conductor to the network. If current is leaking from an electrical conductor or from a device connected to it to outside the device, e.g. via a person in contact with a live part to true earth or to a guard wire, the inbound current and the return current are no longer of equal magnitude. If the difference in the currents increases past a permitted value, the residual current protection disconnects the current. In, practice the operation is based on a precise and fast magnetic tripping device (comprising a summation current transformer) or on an electronic supervision circuit and a relay.
  • the residual current devices known in the art are relatively large for use e.g. in sockets.
  • separate trip pushbuttons for the testing state and reset state are used in sockets provided with residual current devices, which makes these types of sockets relatively complex in their construction and expensive owing to the separate components.
  • the aim of the current invention is to eliminate the drawbacks of prior art and to achieve an entirely new kind of residual current device.
  • One preferred method of use according to the invention is to use a residual current device connected to a duplex Schuko socket such that a small-sized integrated main switch-trip part of the residual current device, provided with a metallic vertical shaft traveling through a trip coil and with a permanent magnet, is used in it, which main switch-trip part can be disposed, owing to its small size, e.g. in the socket beside the socket parts essentially inside the same face plate with them.
  • the selector pushbutton for the testing state and reset state of the residual current switch is integrated into the main switch-trip part, in which case an extremely compact construction is achieved.
  • a preferred embodiment of the invention is characterized in that on the frame part of the trip module of the knob part of the main switch, placed horizontally against the vertical shaft of said knob part, is a LED indicating operation of the device.
  • a preferred embodiment of the invention is characterized in that on the frame part of the trip module of the knob part of the main switch, placed horizontally against the vertical shaft of said knob part, is a mechanical device-status indication indicating operation of the device.
  • a preferred embodiment of the invention is characterized in that on the knob part of the main switch, in the direction of its vertical shaft, is a mechanical device-status indication indicating operation of the device.
  • the residual current device according to the invention can also be used, owing to its advantageous physical size, as an appliance on the front of various sockets provided with residual current protection, e.g. the sockets of kitchen light fittings and bathroom light fittings.
  • Fig. 1 presents a side view of a main switch according to the invention
  • Fig. 2 presents a top view of a socket provided with a residual current device according to the invention
  • Fig. 3 presents a top view of its main switch-trip part according to the invention
  • Fig. 4 presents a side sectional view E-E of the main switch-trip part according to Fig. 3,
  • Fig. 5a presents a top view of a socket provided with a residual current device according to the invention.
  • Fig. 5b presents a side sectional view F-F of a socket according to Fig. 5a.
  • the knob part 301 of the main switch is at the very top, which knob part 301 is disposed on the top end of the metal shaft 308 of the knob part of the coil. Below it is a return spring 302 around the shaft, below the spring is the trip winding 303 and the circuit card 304.
  • On the bottom surface of the circuit card are four contact studs 305 and a base part 312, which is connected to the circuit card with a guide piece/movement limiter 3 1.
  • two circuit bridges 309, and the return spring 313 of the base part Inside the base part 312 is a permanent magnet 306.
  • the main switch operates such that a pushing force is exerted on the knob part 301 of the main switch.
  • the metal shaft 308 of the knob part displaces through the trip winding 303 towards the permanent magnet 306 of the base part.
  • the permanent magnet 306 disposed in the base part 312 of the main switch pulls the base part 3 2 against the metal shaft 308 of the knob part.
  • the knob part 301 of the main switch and the metal shaft 308 of the knob part attached to it rise back to their upper position from the force of the return spring 302 at the same time lifting the base part 312 into its upper position towards the circuit card 304, which is fixed with fasteners 307.
  • a contact between the contact studs 305 on the circuit card 304 and the circuit bridge 309 disposed on the base part 312 forms, remaining in its closed state.
  • Figs. 2, 5a and 5b present a duplex socket 201 provided with a residual current device according to the invention, which socket comprises socket parts 202 for an earthed plug.
  • the knob part 301 of the switch can be swiveled and it has positions for testing state and reset state (0-) and for normal operating state and a part 314 of the swivel for turning it, in which case there is a switch, a test position and a trip position to reset in the same switch.
  • the switch has a protrusion 315 on the edge of the knob part.
  • the switch When the switch is in the l-position it can be pressed on; however, when it is in the l-position the knob can be turned to the right from the swivel part 314, in which case the contact 319 bringing the testing and reset state closes when the protrusion 315 of the knob part displaces and closes the contact 319 in question.
  • the residual current safety switch of the device trips and the switch remains in its upper position and does not sink down to its 0- position.
  • the contact of the main switch opens.
  • the frame part 317 of the selector module also comprises a LED 325 indicating that residual current protection is on.
  • the 0-position and l-position can also be set to be in the opposite sequence.
  • the knob of the switch is pointing in the l-position, at whatever clock position whatsoever, the 0-position of it can also be a position into which it can be turned counterclockwise from the set l-position.
  • the 0-position can be at the 12 o'clock point and the l-position is the space to the left or to the right into which it can be turned.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

Residual current device, which functions on a magnetic tripping principle based on electronic measuring, and which comprises a measuring winding, measuring electronics, a main switch with knob part, a trip coil, a permanent magnet, and a testing and reset contact for residual current protection as well as device-status indication, and an integrated main switch-trip part (301-315) of the residual current device provided with a metallic shaft (308) traveling through the trip coil (303), and a permanent magnet (306) arranged below the shaft, which main switch is simultaneously a contact that opens in a residual current protection situation, which main switch-trip part comprises integrated means, with which it is arranged to function also as a reset switch and testing switch, which means comprise an integrated trip module for bringing about testing/resetting in connection with the knob part (301) as well as a swivel (314) for turning the knob part.

Description

RESIDUAL CURRENT DEVICE
Field of the invention The current invention relates to residual current devices. The current invention relates more particularly to the residual current devices used in sockets and other electrical installation devices, such as in underfloor heating thermostats.
Background of the invention
A socket-based residual current device (SRCD) is a socket having a residual current safety switch that protects an electrical device connected to it and people in the proximity of it from dangerous electric shocks by causing in a residual current situation the tripping of one or more contacts.
A residual current device operates such that in a normal situation in a single- phase circuit the electric current coming from a phase conductor returns via the neutral conductor to the network. If current is leaking from an electrical conductor or from a device connected to it to outside the device, e.g. via a person in contact with a live part to true earth or to a guard wire, the inbound current and the return current are no longer of equal magnitude. If the difference in the currents increases past a permitted value, the residual current protection disconnects the current. In, practice the operation is based on a precise and fast magnetic tripping device (comprising a summation current transformer) or on an electronic supervision circuit and a relay.
The residual current devices known in the art are relatively large for use e.g. in sockets. In addition, separate trip pushbuttons for the testing state and reset state are used in sockets provided with residual current devices, which makes these types of sockets relatively complex in their construction and expensive owing to the separate components.
Summary of the invention The aim of the current invention is to eliminate the drawbacks of prior art and to achieve an entirely new kind of residual current device. One preferred method of use according to the invention is to use a residual current device connected to a duplex Schuko socket such that a small-sized integrated main switch-trip part of the residual current device, provided with a metallic vertical shaft traveling through a trip coil and with a permanent magnet, is used in it, which main switch-trip part can be disposed, owing to its small size, e.g. in the socket beside the socket parts essentially inside the same face plate with them.
In the solution according to the invention the selector pushbutton for the testing state and reset state of the residual current switch is integrated into the main switch-trip part, in which case an extremely compact construction is achieved.
The characteristic features of the residual current switch according to the invention are described in detail in claim 1 below, and those of its preferred embodiments in the other claims.
A preferred embodiment of the invention is characterized in that on the frame part of the trip module of the knob part of the main switch, placed horizontally against the vertical shaft of said knob part, is a LED indicating operation of the device.
A preferred embodiment of the invention is characterized in that on the frame part of the trip module of the knob part of the main switch, placed horizontally against the vertical shaft of said knob part, is a mechanical device-status indication indicating operation of the device.
A preferred embodiment of the invention is characterized in that on the knob part of the main switch, in the direction of its vertical shaft, is a mechanical device-status indication indicating operation of the device.
The residual current device according to the invention can also be used, owing to its advantageous physical size, as an appliance on the front of various sockets provided with residual current protection, e.g. the sockets of kitchen light fittings and bathroom light fittings.
Short description of the drawings In the following, the invention will be described in more detail by the aid of an embodiment with reference to the attached drawings, wherein
Fig. 1 presents a side view of a main switch according to the invention,
Fig. 2 presents a top view of a socket provided with a residual current device according to the invention,
Fig. 3 presents a top view of its main switch-trip part according to the invention,
Fig. 4 presents a side sectional view E-E of the main switch-trip part according to Fig. 3,
Fig. 5a presents a top view of a socket provided with a residual current device according to the invention, and
Fig. 5b presents a side sectional view F-F of a socket according to Fig. 5a.
Description of preferred embodiments of the invention
In the side view of the main switch presented in Fig. 1 , the knob part 301 of the main switch is at the very top, which knob part 301 is disposed on the top end of the metal shaft 308 of the knob part of the coil. Below it is a return spring 302 around the shaft, below the spring is the trip winding 303 and the circuit card 304. On the bottom surface of the circuit card are four contact studs 305 and a base part 312, which is connected to the circuit card with a guide piece/movement limiter 3 1. Additionally, on top of the base part are two circuit bridges 309, and the return spring 313 of the base part. Inside the base part 312 is a permanent magnet 306.
The main switch operates such that a pushing force is exerted on the knob part 301 of the main switch. As a result of the downward force in the direction of the shaft of the main switch the metal shaft 308 of the knob part displaces through the trip winding 303 towards the permanent magnet 306 of the base part. The permanent magnet 306 disposed in the base part 312 of the main switch pulls the base part 3 2 against the metal shaft 308 of the knob part. After the force acting downwards on the knob part 301 of the main switch, in the direction of the shaft of said knob part, is removed, the knob part 301 of the main switch and the metal shaft 308 of the knob part attached to it rise back to their upper position from the force of the return spring 302 at the same time lifting the base part 312 into its upper position towards the circuit card 304, which is fixed with fasteners 307. A contact between the contact studs 305 on the circuit card 304 and the circuit bridge 309 disposed on the base part 312 forms, remaining in its closed state.
In a residual current situation under the effect of the current coming to the trip winding 303 from the electronics of the residual current protection the metal shaft 308 of the knob part detaches from the permanent magnet 306 and the base part 312 displaces from the effect of the return spring 313 of the base part back to its lower position limited by the guide piece/movement limiter 311 of the base part. The contact between the contact studs 305 on the circuit card 304 and the circuit bridges 309 disposed on the base part 312 opens, remaining in its open state.
Figs. 2, 5a and 5b present a duplex socket 201 provided with a residual current device according to the invention, which socket comprises socket parts 202 for an earthed plug.
In the embodiment presented in Figs. 2, 3, 4 and 5a and 5b the knob part 301 of the switch can be swiveled and it has positions for testing state and reset state (0-) and for normal operating state and a part 314 of the swivel for turning it, in which case there is a switch, a test position and a trip position to reset in the same switch. For this purpose the switch has a protrusion 315 on the edge of the knob part. When the switch is in the l-position it can be pressed on; however, when it is in the l-position the knob can be turned to the right from the swivel part 314, in which case the contact 319 bringing the testing and reset state closes when the protrusion 315 of the knob part displaces and closes the contact 319 in question. The residual current safety switch of the device trips and the switch remains in its upper position and does not sink down to its 0- position. The contact of the main switch opens. In this embodiment the frame part 317 of the selector module also comprises a LED 325 indicating that residual current protection is on.
The 0-position and l-position can also be set to be in the opposite sequence. When the knob of the switch is pointing in the l-position, at whatever clock position whatsoever, the 0-position of it can also be a position into which it can be turned counterclockwise from the set l-position.
For example, the 0-position can be at the 12 o'clock point and the l-position is the space to the left or to the right into which it can be turned.
It is obvious to the person skilled in the art that the different embodiments of the invention are not limited solely to the examples described above, but that they may be varied within the scope of the claims presented below.

Claims

1. Residual current device, which functions on a magnetic tripping principle based on electronic measuring, characterized in that the residual current device comprises a measuring winding, measuring electronics, a main switch with knob part, a trip coil, a permanent magnet and a testing and reset contact for residual current protection as well as device-status indication, and it comprises an integrated main switch-trip part (301-315) of the residual current device provided with a metallic shaft (308) traveling through the trip coil (303), and a permanent magnet (306) arranged below the shaft, which main switch is simultaneously a contact that opens in a residual current protection situation, which main switch-trip part comprises integrated means, with which it is arranged to function also as a reset switch and testing switch, which means comprise an integrated trip module for bringing about testing/resetting in connection with the knob part (301 ) as well as a swivel (314) for turning the knob part.
2. Residual current device according to claim 1 , characterized in that on the frame part of the trip module of the knob part of the main switch, placed horizontally against the vertical shaft of the knob part, is a LED indicating the operation of the device.
3. Residual current device according to claim 1 , characterized in that on the frame part of the trip module of the knob part of the main switch, placed horizontally against the vertical shaft of the knob part, is a mechanical device- status indication indicating the operation of the device.
4. Residual current device according to claim 1 , characterized in that on the knob part of the main switch, in the direction of its vertical shaft, is a mechanical device-status indication indicating the operation of the device.
5. Residual current device according to any of the preceding claims, characterized in that the main switch comprises
- a knob part (301 ), which is disposed on the top end of the metal shaft (308) of the knob part of the coil,
- below it a return spring (302) around the shaft, and
- below it a trip winding (303) and a circuit card (304).
6. Residual current device according to any of the preceding claims, characterized in that on the bottom surface of the circuit card are contact studs (305) and a base part (312), which is connected to the circuit card with a guide piece/movement limiter (311 ).
7. Residual current device according to any of the preceding claims, characterized in that inside the base part, inside the protrusions on the sides of it, are two circuit bridges (309).
8. Residual current device according to any of the preceding claims, characterized in that arranged in the base part (312), more particularly inside it, is a permanent magnet (306), and on the top surface of the magnet the return spring (313) of the base part.
9. Residual current device according to any of the preceding claims, characterized in that the knob part (301 ) of the switch can be swiveled and it has 0/T and I positions, and a swivel part (314) for turning it, when the swivel part (314) indicates the state.
10. Residual current device according to any of the preceding claims, characterized in that the switch comprises a switch position (I) for normal state and a trip position (0/T) for the reset/test state in the same operating switch of the residual current protection such that it has a protrusion (315) on the edge of the knob part (301 ), which when turning the knob part (301 ) is arranged to move on the support (318) of the selector protrusion, in which case the contact (319) bringing the testing and reset state closes when the protrusion (315) of the knob part displaces and hits the closing surface of the contact (319) in question, causing tripping of the residual current device, in which case the knob part (301 ) remains in the displaced (0/T) position and it does not sink down in this position of it.
11. Residual current device according to any of the preceding claims, characterized in that the knob part (301 ) of the switch can be swiveled and it has switch positions for the trip position (0/T) to reset/test state and for the normal (I) state, and which knob part when the residual current protection trips remains in its position for normal state, but the mechanical device-status indication, indicating the operation of the device, that is on the frame part of the trip module of the residual current device, placed on the knob part (301 ), horizontally against its vertical shaft, indicates that the device is in the resetting state.
12. Residual current device according to any of the preceding claims, characterized in that the knob part (301 ) of the switch can be swiveled and has switch positions for the trip position (0/T) to reset/test state and for the normal (I) state, and which knob part when the residual current protection trips remains in its position for normal state (I), but the electronic LED-operated device-status indication, indicating the operation of the device, that is on the frame part of the trip module of the residual current device, placed on the knob part (301 ), horizontally against its vertical shaft, indicates that the device is in the reset state.
PCT/FI2012/051167 2011-11-24 2012-11-26 Residual current device WO2013076377A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12851980.8A EP2783382A4 (en) 2011-11-24 2012-11-26 Residual current device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20116178 2011-11-24
FI20116178A FI123345B (en) 2011-11-24 2011-11-24 Fault-operated switch

Publications (1)

Publication Number Publication Date
WO2013076377A1 true WO2013076377A1 (en) 2013-05-30

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Application Number Title Priority Date Filing Date
PCT/FI2012/051167 WO2013076377A1 (en) 2011-11-24 2012-11-26 Residual current device

Country Status (3)

Country Link
EP (1) EP2783382A4 (en)
FI (1) FI123345B (en)
WO (1) WO2013076377A1 (en)

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EP3419041A1 (en) * 2017-06-22 2018-12-26 Etherma Skandinavia Oy Main switch arrangement for a residual current safety switch

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FI123345B (en) 2013-02-28
FI20116178A (en) 2013-02-28
EP2783382A1 (en) 2014-10-01
EP2783382A4 (en) 2015-08-19

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