Classifications

• • 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
  • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
  • H01H71/465—Self-contained, easily replaceable microswitches
• • 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
  • H01H71/503—Means for increasing the opening stroke of the contacts
• • 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
  • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
  • H01H2071/467—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts with history indication, e.g. of trip and/or kind of trip, number of short circuits etc.
• • 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
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
  • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts

Definitions

• the invention relates to a low-voltage circuit breaker with a relative auxiliary switch.
• a relative auxiliary switch is to be understood as a signaling switch that is only actuated when the generally multi-pole low-voltage circuit breaker is triggered.
• the relative auxiliary switch is actuated via a resilient intermediate member by a driver pin of the latchable support lever of the switch lock of the low-voltage circuit breaker.
• the relative auxiliary switch is actuated via a spring-loaded lever shaft by the support lever of the key switch.
• a low-voltage circuit breaker in which the prestressed actuating plunger of a relative auxiliary switch is also actuated by the support lever via a resilient intermediate member.
• the prestressed actuating plunger of a normal auxiliary switch ie an auxiliary switch signaling the position of the main contacts
• the latter solution cannot be applied to a relative auxiliary switch.
• the disadvantage of the state of the Technology is that relative auxiliary switches are controlled by the switch lock in a complex and complicated manner.
• the invention is therefore based on the object of specifying a simple control of the relative auxiliary switch that is independent of the switching lock.
• a low-voltage circuit breaker with a relative auxiliary switch with a molded housing, in or on which the relative auxiliary switch is installed or attached, with interacting fixed and movable contacts per pole and with a switch carrying the movable contacts
• Wave solved by the low-voltage circuit breaker has a switch lock, which on the one hand contains a toggle or similar actuation means and on the other hand is operatively connected opening and closing to the movable contacts and can be triggered by release means, the opening angle of the movable contacts or the switching shaft being triggered State is greater than in the switched-off state, furthermore has a pivot lever mounted in the molded housing, which is in operative connection with a pretensioned actuating plunger of the relative auxiliary switch, and finally arranged in such a way on the selector shaft has radial extension that this acts on the pivot lever only in the triggered state.
• the switch lock contains a toggle lever which has a cam element at one end and, with the other lever end, can be pivoted between the switched-off and the switched-on state against the force of a spring force accumulator, which acts between a switching link connected to the rocker arm and the cam element as well as between the triggered and the switched-off state can be supported against a latching and unlatching support lever, the cam element being in engagement with at least one cam slot of the control shaft, which is designed such that the triggered state causes a larger opening angle than the switched-off state .
• the curvature of the cam slot bent to the movable contact is greater than the curvature of the path of movement of the cam element between the triggered and the switched off state.
• the toggle lever system of the proposed switch lock is composed of a cam slot and a toggle lever which is guided in a rotatably displaceable manner, as a result of which, when triggered, a larger opening angle of the control shaft and thus of the movable contacts than can be achieved in the normal switched off state.
• This is achieved in particular by a greater curvature of the cam slot compared to the curvature of the movement path of the cam element around the tilt axis of the support lever.
• the toggle lever consists of a symmetrical pair of toggle levers which are connected at one end in parallel at a distance via the cam element designed as a connecting axis.
• the area of application of the pivot lever for the extension is closer to the pivot axis than the operative connection area with the actuating plunger.
• Figure 1 is a representation of the essentials of a low-voltage circuit breaker according to the invention in cross section in the region of the middle pole with a side view of the switch lock, and that in the switched-on state;
• FIG. 4 the low-voltage circuit breaker according to the invention in cross section in the area of an outer pole with a side view of the relative auxiliary switch, in the switched-on state;
• Figure 5 as before, but in the triggered state.
• a contact system 4 and a switch 6 are arranged in the lower part 2 of a molded housing.
• the contact system 4 consists of a fixed contact 8 and a movable contact 10, the movable contact 12 of which can be brought into and out of connection with an immovable contact 14 of the fixed contact 8.
• the movable contact 10 is pivotally mounted about an axis 15 in a transverse switching shaft 18 and also via its integrally formed cam slot 16 the switch lock 6 connected.
• the switching mechanism 6 consists of a switching link 20, a support lever 22, a toggle lever 24, a spring force accumulator 26 and a latching mechanism 28.
• the switching link 20 has a rocker arm 30 to be actuated on the one hand and is supported on the other hand with its leg end 32 so that it can pivot in the lower part 2.
• the support lever 22 is supported, on the one hand, by a grip 34 on a stationary tilt axis 36 and, on the other hand, can be latched to the latching mechanism 28 via its latching surface 38.
• the toggle lever 24 is on the one hand slidably guided in the cam slot 16 via a cam element 40 and on the other hand is supported with its lever end 42 against the force effect of the spring force accumulator 26, which engages between the rocker arm end of the switching link 20 and the cam element 40, pivotably against an abutment 44 of the support lever 22.
• the support lever 22 is also carried in a clockwise direction by a driving element 46 of the switching link 20 and on its latching surface 38 by a latch 48 of the latching mechanism 28 loaded with a latch spring 50 latched in a known manner.
• the upper engagement point of the spring force accumulator 26 is also pivoted counterclockwise, so that after the overstretched position of the spring force accumulator 26 is exceeded, the toggle lever tilts clockwise in the abutment 44, as a result of which via the cam element 40 and the cam slot 16, the contact system 4 is closed.
• the contact system 4 assumes a larger opening angle between the movable contact 10 and the fixed contact 8 in the triggered state than in the switched-off state. This is brought about by the fact that the cam element 40 is connected to the cam slot 16 so that it can rotate, and the curvature of the path of movement of the cam element 40, which occurs during the transition to the triggered state, is smaller than the curvature of the cam slot 16 bent about the axis 15.
• FIGS. 4 and 5 show the interaction of the switching shaft 18 described above with a relative auxiliary switch 56, which is fastened in a suitable manner in a recess 57 provided for this purpose in the upper part 58 of the molded housing.
• a radial extension 60 is formed on the control shaft 18.
• the extension 60 comprises a region 62 in the form of a segment of a circle and merges on one side into an actuating lever 64 pointing away from the selector shaft 18.
• a one-armed pivot lever 68 is arranged between an actuating plunger 66 of the relative auxiliary switch 56 and the extension 60, the pivot axis 70 of which is mounted in a lever bearing 72 connected to the upper part 58.
• the actuating plunger 66 is spring-loaded in a conventional manner in a direction pointing outward from the auxiliary switch 56, so that when the low-voltage circuit breaker is switched on, the free end 74 of the pivoting lever 68 on the area in the shape of a segment of a circle, as shown in FIG. 4 62 of the extension 60 abuts.
• the free end 74 of the pivot lever 68 slides on the periphery along the circular segment-shaped area 62 of the extension 60, so that no pivoting movement of the pivot lever 68 can take place.
• the actuating plunger 66 in turn is acted upon at the end face by a hump-shaped active connection region 78 of the pivoting lever 68 remote from the pivot axis in the direction of the interior of the relative auxiliary switch 56, as a result of which the latter is actuated and a corresponding signal signal is emitted at its line connections (not shown) for signaling the triggered state.
• the ratio of the distances between the actuation area 76 and the operative connection area 78 to the pivot axis 70 advantageously converts the relatively small difference in the angular position of the control shaft 18 between the switched-off and the triggered state into a sufficiently large stroke movement of the actuating plunger 66.

Landscapes

• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Breakers (AREA)
• Mechanisms For Operating Contacts (AREA)
• Keying Circuit Devices (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=6509862

Family Applications (1)

Country Status (6)

Families Citing this family (7)

Family Cites Families (15)

• 1994
  • 1994-02-09 DE DE4404073A patent/DE4404073A1/de not_active Withdrawn
• 1995
  • 1995-01-13 JP JP52088895A patent/JP3363905B2/ja not_active Expired - Fee Related
  • 1995-01-13 DE DE59504222T patent/DE59504222D1/de not_active Expired - Lifetime
  • 1995-01-13 WO PCT/DE1995/000032 patent/WO1995022161A1/fr not_active Ceased
  • 1995-01-13 US US08/687,581 patent/US5774031A/en not_active Expired - Lifetime
  • 1995-01-13 EP EP95905536A patent/EP0744080B1/fr not_active Expired - Lifetime
  • 1995-01-13 AT AT95905536T patent/ATE173354T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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