EP0371416B1 - Thermisches Relais - Google Patents

Thermisches Relais Download PDF

Info

Publication number
EP0371416B1
EP0371416B1 EP89121794A EP89121794A EP0371416B1 EP 0371416 B1 EP0371416 B1 EP 0371416B1 EP 89121794 A EP89121794 A EP 89121794A EP 89121794 A EP89121794 A EP 89121794A EP 0371416 B1 EP0371416 B1 EP 0371416B1
Authority
EP
European Patent Office
Prior art keywords
housing
auxiliary switch
bimetal
support plate
relay according
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.)
Expired - Lifetime
Application number
EP89121794A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0371416A2 (de
EP0371416A3 (de
Inventor
Karl Dipl.-Ing. Lieber
Georg Dipl.-Ing. Kohnen
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.)
Eaton Industries GmbH
Original Assignee
Kloeckner Moeller GmbH
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 Kloeckner Moeller GmbH filed Critical Kloeckner Moeller GmbH
Publication of EP0371416A2 publication Critical patent/EP0371416A2/de
Publication of EP0371416A3 publication Critical patent/EP0371416A3/de
Application granted granted Critical
Publication of EP0371416B1 publication Critical patent/EP0371416B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature
    • 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 imbalance of two or more currents or voltages
    • H01H83/223—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 imbalance of two or more currents or voltages with bimetal elements
    • 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
    • H01H2071/109—Operating or release mechanisms with provisions for selecting between automatic or manual reset

Definitions

  • the invention relates to a thermal relay with bimetallic triggers accommodated in a housing with at least one side that can be closed by means of a cover, and an auxiliary switch with rocker switch and a multi-part transmission device that responds to the bimetal deflection and actuates the auxiliary switch with a compensation bimetal rod for the ambient temperature, and operating elements in the form of a setting element for the current by changing the release path of the bimetallic release, a test element for testing the switching function of the auxiliary switch and an operating element for resetting the auxiliary switch to the starting position by hand or automatically.
  • Thermal relays also known as thermal overcurrent relays or overload protection relays, serve as reliable motor protection in the event of overload and phase failure by switching off the motor.
  • the essential components of such a thermal protection relay are bimetallic trip units, transmission mechanisms and auxiliary switches.
  • FIG 1 the principle of operation of such a known relay is shown.
  • the differential path of the bridge system is translated by the actuating lever 16 and transmitted to the rocker switch 400 via the transmission mechanism with a release lever 17 and a temperature compensation strip 300 which can be set as a function of the current.
  • the rocker switch moves the auxiliary switch 500, which is designed as a snap switch with the normally closed contacts 95, 96 and galvanically separated normally open contacts 97, 98, and switches it when the motor is overloaded and switches off the motor contactor and thus the motor at risk.
  • the energy supply for the bimetallic releases 100 which are electrically connected in series with it is interrupted, these cool down again and return to the starting position.
  • the relay has a current setting device 620 with which it can be set to different nominal motor currents.
  • the relay can be switched on again either automatically A or by hand H, this mode of operation can be set by means of the restart lock 600, which also forms the unlock key and is referred to as the reset key.
  • An off-test button 650 is also provided. Depressing button 650 opens the break contact and the circuit of the motor contactor is interrupted without a fault message being issued via the make contact of the auxiliary switch. Pulling the same button simulates a trigger, the test. The normally closed contact is opened and the normally open contact is closed in the test function. When operating with a restart lock, the changeover is retained until it is unlocked using the unlock button.
  • a thermal relay is known from EP-PS 011 0758, which is composed of two housing parts in order to enable a space-saving design.
  • the ones used for current monitoring are in a first housing part Bimetallic strips housed and in a second housing part of the safety switch, a transmission device and a thermal compensation device.
  • the housing parts and partitions are equipped with openings and window recesses.
  • the relay is compact in design, but complicated to assemble, since the parts have to be assembled from different assembly directions and the two housing parts still have to be adjusted to each other.
  • the invention has for its object to construct the known thermal relays in terms of handling and ease of use on the one hand, the precision of the response in the event of overcurrent and phase failure as well as the economical production, i.e. easy to assemble, to improve. It is particularly important to facilitate the assembly of the auxiliary switch part with operating elements, with many individual elements that are subject to high dimensional accuracy having to be put together.
  • the object is achieved in a generic thermal relay with control elements arranged in the housing and accessible from the outside and an auxiliary switch influenced by this, in that all control elements are held on a support plate, that the support plate together with the control elements in that with the auxiliary switch parts, the transmission device and the bimetallic triggers can be inserted from the lockable side by means of the removable cover.
  • the inserted support plate then forms part of the housing wall.
  • the assembled carrier plate is only inserted into the housing after all other auxiliary switch parts have been installed.
  • the carrier plate is first equipped with the correspondingly designed controls, whereby the assembly can be done automatically due to the clever construction.
  • the carrier plate with control elements thus produced as a pre-assembled unit is then assembled with the housing for final assembly, none additional adjustment is required.
  • the housing is also designed so that all parts to be inserted into the housing can be used from just one direction of assembly.
  • the thermal relay is thus designed to be easy to install.
  • the housing has removable parts on two sides, namely the cover and the carrier plate. This means that there are large openings for inserting the device parts.
  • the device parts can all be inserted into the housing from just one direction of assembly. There is only one common housing for all parts to be used, so that additional adjustment work is not necessary.
  • the housing itself can be manufactured with high precision. Since all device parts can be inserted into the housing from just one direction of assembly, automatic production is possible, for example using robots, which enables high precision and safety in the production of the thermal relays.
  • the relay according to the invention is also characterized in that all controls are arranged next to one another in an easily accessible place, both the setting element for the operating current, the test element for function testing of the switching function of the auxiliary switch and the operating element, which both the operating position for the Manual or automatic resetting of the auxiliary switch enables as well as the resetting of the auxiliary switch - Reset - includes.
  • An advantageous structural design of the support plate for receiving and holding the operating elements can be found in the characterizing features of claim 2.
  • the carrier plate is additionally equipped with receptacles and holders for the elements to be actuated by the operating elements.
  • An inventive guide and holder on the carrier plate which allows the adjustability of the test member can be gathered from the characterizing features of claim 3.
  • the operating device for the hand - automatic adjustment - for resetting the normally open contact is according to the characterizing features of claim 4 as a rotary knob with two snap-in positions and further perpendicularly movable for the reset required in manual operation as a reset button.
  • the make contact ie the adjustable fixed contact of the auxiliary switch, is adjusted via the bellcrank actuated by the operating element, which is also rotatably mounted on the underside of the carrier plate.
  • the operating element which is also rotatably mounted on the underside of the carrier plate.
  • it is also equipped with a return spring which is also articulated on the carrier plate.
  • An expedient embodiment of the housing for the thermal relay in order to be able to insert the support plate equipped with the operating elements during assembly as a finished module, provides for the housing to be designed, for example, like the features of claim 5.
  • This design of the housing allows, despite the small size of the device, to create sufficient space overall for access to assembly and joining tools, with which the auxiliary switch parts, the transmission device and the bimetallic release can be mounted in the housing and then the carrier plate with the Controls can be used.
  • a further simplification of the assembly of the thermal relay is achieved according to the invention in that the cover is designed in accordance with the features of claim 6 with tubular connecting sockets, in particular molded connecting sockets for the plug connections, and all plug connections are held in a single holding frame. In this way, it is possible to assemble the plug connections preassembled in the holding frame into the housing at the same time in a single operation.
  • bimetallic triggers not only respond to the temperature generated by the current, but are also influenced by the ambient temperature, they become caused fluctuations in the tripping current in the relay compensated by temperature compensation in the form of a bimetallic rod.
  • This compensation bimetallic rod is provided in the transmission mechanism between the bimetallic release and the auxiliary switch, ie the rocker switch. Since the bimetallic triggers also respond to the current, it is necessary to be able to set the relay, the bimetallic triggers and also the compensation bimetallic rod to different nominal currents, for which purpose the current setting element is provided in the carrier plate. The setting to different current strengths is ultimately achieved by adjusting the triggering path of the transmission device.
  • Appropriate temperature compensation is also required for equipping the carrier plate with the current setting element according to the invention, i.e. a suitable design of the compensation bimetallic rod is required.
  • an embodiment of the compensation bimetallic rod is proposed for this purpose, which at the same time for controlling the current, i.e. to adjust the current and to compensate for the ambient temperature.
  • the combined control and compensation unit is characterized according to the invention by the characterizing features of claim 7.
  • the compensation bimetallic rod is mounted and arched in a double suspension, which reduces the bending back and the compensation path is evened out.
  • the contact point on the eccentric enables adjustment to different currents by adjusting the eccentric, i.e. of the adjusting element.
  • the transmission path is influenced in a further embodiment in accordance with the features of claim 8.
  • the fixed pivot point of the other end of the compensation bimetal rod thus defines the pivot point for the trigger lever for transmitting the bimetal triggering to the auxiliary switch via the connection to the shaft axis of the trigger lever.
  • the Compensation bimetallic rod forms with the shaft axis of the release lever via the support part a triangle movable around the pivot point formed by the fixed end of the compensation bimetallic rod, the second corner point of which can be moved by the variable side length corresponding to the lengthening or shortening of the compensation bimetallic rod on the eccentric and its third the corner point formed at the center of the shaft axis of the release lever is forcibly adjustable by changing the position of the compensation bimetallic rod by a distance K which corresponds to the compensation.
  • the rocker switch has a defined mass distribution at the center of gravity of the rocker switch in the bearing axis of the rocker switch or as close as possible to it.
  • the center of gravity should be arranged as precisely as possible in the plane of the rocker switch bearing. In this way it is achieved that in the event of vibrations, in particular in the direction of the bearing, the opening moment is equal to the closing moment. This increases the shock resistance of the auxiliary switch break contact without affecting the switching movement.
  • the rocker switch can be designed with two blades arranged in an alignment and forming the bearing axis for storage in bearing notches of the connection contact pieces of the auxiliary switch.
  • the rocker switch is preferred as open multi-chambered hollow body, so that the necessary size can be realized while saving weight.
  • the shape and shape of the rocker switch is adapted to the switching movement, preferably in the two central planes perpendicular to the bearing axis, each mirror-symmetrically offset by 180 °.
  • the switching rocker can be equipped with compensating masses in the form of webs and walls, possibly with the inclusion of materials of higher density, which protrude downward beyond the bearing axis.
  • the switching movement of the rocker switch is triggered by the transmission of the release path as a result of the bimetallic deflection via a transmission mechanism with levers, a tension spring being provided as the end member, which connects the rocker switch to the transmission mechanism.
  • a tension spring being provided as the end member, which connects the rocker switch to the transmission mechanism.
  • the invention is shown in the drawing using an exemplary embodiment of a thermal relay with structural details of the configuration.
  • the motor protection relay 1 shown in FIGS. 2 to 6 works according to the physical principle as a bimetal relay, as was explained with the functional principle of FIG. 1.
  • the bimetallic triggers 100 see FIG. 6, are accommodated with the bridge system 200, which consists of a tripping bridge with a differential bridge.
  • the heating coil 101 surrounds the individual bimetal releases and can be connected at one end to a power supply device via plug connections 66.
  • the plug connections are inserted and held in tubular sockets 132 formed on the outside of the cover 13.
  • the plug connections 66 are inserted into the holding frame 67 and are inserted as a module in the housing, the cover 13 is plugged onto the plug connections 66 from the front with the sockets 132.
  • the three phases of the motor current are connected to the bimetallic release 100 via the connections 2, 4, 6 and contact tabs 20.
  • the bridge system 200 in is bent by bending the bimetal release 100
  • the direction of the arrow G moves and triggers the switching movement of the rocker switch 400 in the direction of the arrow F via the transmission device with the actuating lever 16, bimetal compensation rod 300, release lever 17, tension spring 125.
  • the movement is triggered by the tension spring 125, which is attached at one end to the rocker switch 400 and at the other end to a screw 126 arranged on the housing 10 and is actuated by the release lever 17. If the tripping path that can be set as a function of the current intensity by means of the bimetal compensation rod 300 is exceeded, the break contact 95, 96 of the auxiliary switch is opened by switching the rocker switch and the downstream motor contactor (not shown here) switches off the endangered motor. At the same time, the normally open contact 97.98 is closed by switching the rocker switch.
  • the relay according to FIGS. 2 to 6 is equipped with an adjusting element 620 in the form of a rotatable eccentric for setting the size of the nominal current.
  • an operating device 600 with unlocking also referred to as a reset button
  • a reset button is provided with the operating position “auto” or “manual”.
  • auto which works without restart lock
  • the rocker switch automatically returns to the starting position and closes the break contact, so that the motor switches on again automatically after tripping.
  • a restart lock is used and the rocker switch must be reset to the starting position by manually pressing the reset button.
  • the relay also has a test lever 650, which is designed as a multi-function key, in order to simulate by hand a trial opening of the normally closed normally closed contact and closing of the normally open contact for testing or commissioning.
  • the housing 10 is divided by the wall 103 into two chambers, the bimetallic release and the bridge system 200 being accommodated in one chamber and the auxiliary switch parts and carrier plate with operating elements in the other chamber. Partition walls 104 are also provided between the individual bimetal releases 100.
  • the carrier plate is inserted and guided in grooves 102 of the housing. The front of the two chambers is closed by the cover 13.
  • the test element 650 is guided with its lever 652 in the chamber of the auxiliary switch parts in such a way that, when actuated appropriately, it can open the break contacts 95/96 and close the contacts 97/98 by switching the rocker switch 400.
  • the carrier plate which is fitted with the operating elements as a preassembled unit, is completely inserted into the housing 10 during final assembly, in an advantageous embodiment.
  • the carrier plate with an approximately rectangular shape, which closes the housing chamber 105 receiving the auxiliary switch on the upper side, has guide strips 602 along the sides that come into contact with the housing walls, which engage in corresponding grooves in the housing.
  • the bulge 603, preferably stepped, is formed on the end face 618 of the carrier plate 60, which is later closed with the housing cover 13.
  • the setting element for the current for example in the form of the eccentric 620, can be inserted into this bulge 603 from the side.
  • the recess 604 for receiving the test element 650 is formed approximately in the center along the side of the carrier plate which bears against an outer wall of the housing 10. This test organ is also inserted into the carrier plate from the side.
  • the support plate is formed with the through bore 605, which is formed on the underside of the support plate with pairs of webs 6051, 6052, of which the webs 6051 are provided with locking hooks projecting from the bore.
  • Figure 7d shows the side view of the carrier plate on the cut-out opening 604, FIG. 7e the longitudinal section A5B5, FIG. 7b the cross section D1D1 and FIG. 7c the cross section C1C1 and FIG. 7f the bottom view of the carrier plate 60. From FIG.
  • the receiving bore 605 for the operating element two paragraphs is formed in different levels for corresponding locking positions of the operating element 600.
  • a receiving pocket 608 is formed on the carrier plate on the underside of the carrier plate on the side opposite the cutout opening 604 by means of a projecting web 609.
  • a bearing in the form of bearing blocks 606 is formed on the underside of the carrier plate along one side opposite the bore 605 for the storage and fastening of the bellcrank for the reclosing lock or the self-decay of the rocker switch.
  • the guide strips 602 can have a dovetail shape, for example.
  • the support plate 60 is to be mounted in a precise position, therefore the catch cam 607, which engages in a corresponding groove in the housing wall, is formed on the underside of the support plate opposite the insertion side.
  • FIGS. 8a to 8d show the carrier plate 60 equipped with the test element 650 and the operating element 600.
  • the test element 650 which is formed in two further views in FIGS. 9a and 9b as a lever 652 which has been bent several times, can be adjusted in the direction of the arrow to carry out the test function.
  • the test element 650 is guided on the underside of the carrier plate 60 in the pocket 608 by a guide web 651 which extends at right angles to the longitudinal extent of the lever 652.
  • the guide web 651 is designed to be somewhat elastic, so that guidance is ensured when the test element 650 moves up and down in the direction of the arrow.
  • the test lever 652 of the test element also has a longitudinally projecting guide rib 653.
  • the operating element 600 is a multi-function key. By rotation, two snap positions are in different levels possible that cause either the self-decline of the rocker switch or the self-locking of the rocker switch by a corresponding adjustment of the adjustable fixed contact 98 forming the normally open contact. In addition, the self-locking can be released again by actuating the operating element 600.
  • FIGS. 8 in conjunction with FIGS. 12 and 14 show the design of the operating element 600 and mode of operation using an exemplary embodiment.
  • the operating element 600 is designed, for example, in the manner of a cap nut, see FIGS. 11a to 11c, with the through bore 613 for receiving a threaded pin 610.
  • guide ribs 614 are provided, on the outside the projections 611 and 612 are formed at different locations, making it possible to snap them into the operating position "auto" or “hand” by turning the operating element 600 accordingly.
  • the operating element 600 cooperates with the deflection lever 670, which is in contact with the stop end 6701 with the adjustable fixed contact 98.
  • the bell crank 670 is of an angular design and is rotatably fastened at the other end 6702 in the bearing blocks 606 on the underside of the carrier plate 60.
  • the return spring 660 for example a leaf spring, as shown in two views in FIG. 10, is articulated on the bell crank in a pocket 6704 and also on the other Fixed end in the area of the pedestals 606.
  • the position of the bell crank 670 shown in dashed lines in FIG. 14 corresponds to the automatic operating position of the relay, ie that the rocker switch automatically returns to the starting position after the switchover.
  • the unlocking is carried out by pressing the operating element 600 in the direction of the arrow, which is used as a reset button.
  • FIGS. 15a to c shown, formed with contact lug 661, plug 663 and U-shaped loop 662.
  • a single holding frame 67 as shown in FIGS. 16a to 16c, has U-shaped cups 671, 672, 673, which are connected to one another by a web 674.
  • the connectors 66 with the loop can be inserted into the wells and then attached to the housing as a pre-assembled unit.
  • FIGS. 17 to 18 An advantageous shape of a rocker switch with a defined center of gravity in the tilting and bearing plane L is shown in FIGS. 17 to 18.
  • the rocker switch of FIGS. 17a, b is complete, ie equipped with contact angles 41, while the cross sections, bottom view, top view and the two partial perspectives according to FIGS. 18a-e show the rocker switch 400 without a contact angle.
  • the cutting edge bearing 401 is brought about by the cutting edges 43 formed on the contact angles 41 below, which form the bearing plane and the axis of rotation L.
  • the rocker switch is mirror-symmetrically offset by 180 ° around each of the vertical central axes M and D, so that two identical contact angles 41 can be arranged on both sides 409 and 410 of the rocker switch.
  • the introduction of force for the switchover movement of the rocker switch 400 should take place symmetrically in the central axis, for which purpose the web 402 is provided in a cavity 406 of the rocker switch that is at least accessible from below for hanging the force-transmitting tension spring.
  • the web 402 is located approximately at the level where the contact surfaces or contact pieces 42 of the contact angle 41 also extend on the outside.
  • the rocker switch now has a defined mass distribution with a corresponding configuration such that the center of gravity of the rocker switch 400 comes to lie in the bearing axis L as far as possible.
  • the rocker switch is equipped with lateral projections 404 and 405 extending downward beyond the bearing axis L on both sides of the central axis M in the form of walls or webs or the like.
  • this area is preferably equipped with cavities.
  • the lateral downward projecting parts 404 and 405 for example, heavy mass particles, while the rocker switch itself is made, for example, of a relatively light plastic.
  • FIGS. 19a, b, c show an advantageous embodiment of the contact angle 41 for the rocker switch with molded cutting edge 43 in the three views from the front, from the side and from above.
  • the contact angle 41 has an approximately angled L-shaped shape, the contact piece 42 being provided on the protruding angle arm 41a.
  • the cutting edge 43 is formed on the foot of the other angle arm 41b.
  • the angle arm 41a of the contact angle is bent in the second plane, see FIG. 14c, which creates the contact surface B on the rocker switch.
  • Other forms of the contact angle 41 are also conceivable.
  • an angle of 30 ° is expedient for the cutting edge formation 43.
  • the mutually mirror-inverted contact angles 41 assigned to the rocker switch then form with their cutting edges 43 an aligned line which forms the bearing and axis of rotation L and in which the center of gravity of the rocker switch should also be as precise as possible.
  • the contact angles 41 are guided, for example, in insertion grooves 403 of the rocker switch 400 with a precise fit, at the lower end of which the blades 43 formed on the contact angles 41 protrude for storage.
  • the counter bearing of the rocker switch is formed by the contacts 95 and 97 of the rocker switch of the auxiliary switch, which are housed in the housing 10 of the relay.
  • the connections 95 and 97 see FIGS. 22 and 23 each consist of a connection angle, shaped more or less in accordance with the available space, more or less in a Z shape, which is fastened on one side in the respective connection screw 951 and 971, respectively.
  • a V-shaped notch 952 and 972 is located at the free, upstanding, other end of the connection bracket formed, which form the cutting edge bearing for the cutting edges 43 of the rocker switch.
  • connections 96 and 98 of the fixed contacts of the auxiliary switch assigned on the opposite side of the rocker switch each have the connection screw 961 and 981 with the correspondingly shaped connection angles 96 and 98, which are more or less resilient, see FIGS. 20 and 21.
  • the rocker switch 400 of the thermal relay of the example shown is also designed for electrical isolation between the normally closed and normally open contacts.
  • the triggering path is adjusted according to different current strengths to be monitored via the setting element 620, e.g. a rotary knob with scales, which adjusts the adjacent bimetal compensation rod 300 via an eccentric.
  • 26a, b show the structure of a control and compensation unit according to the invention with the compensation bimetal rod 300 in a schematic view.
  • the compensation bimetal rod 300 is permanently pre-formed mechanically with a uniform circular arc shape with a curvature corresponding to the radius r.
  • the compensation bimetal rod 300 is mounted at a fixed pivot point M3.
  • the fixed pivot point is formed, for example, by the axle or bolt 302, which is rotatable in a bearing bush 304 attached to the housing 10.
  • the compensation bimetal rod 300 is fixedly connected to the axle bolt 302 in the region 301, for example welded, and can be rotated about the fixed pivot point M3 in the bearing bush 304.
  • the attachment point 301 is preferably arranged on the convex side 308 of the compensation bimetal rod.
  • the compensation bimetal rod 300 is supported with its convex side 308 on the eccentric of the setting member 620 for the nominal current.
  • the contact surface 621 on the eccentric 620 practically forms a rotary contact surface for the compensation bimetallic rod, which at the same time increases or decreases pushes along this pivot point, whereby the contact point M2 of the compensation bimetallic rod is moved to M2 '.
  • the release lever 17 is rotatably mounted about the shaft axis 170 and transmits the release movement by a stop at its end 171 to the other end 172.
  • the release paths, see arrows H1, H2, are calibrated by means of the temperature compensation with the aid of the compensation bimetal rod 300.
  • the shaft axis 170, which carries the release lever 17, is rigidly connected to the compensation bimetal rod 300 via the support part 310, for example a metal rod, for example by welding the shaft axis 170 in the area 307 to the support part 310 and in the area 306 by welding the support part 310 with the compensation bimetal rod 300.
  • the supporting part 310 is articulated and welded tangentially to the convex side 308 of the compensation bimetal rod, and also tangential to the shaft axis 170 of the release lever.
  • the center point M1 of the shaft axis 170 can be moved in the direction of the arrow K when the position of the support part 310 changes, and thus the stop surfaces are also shifted or the release paths of the lever ends 171 and 172 change, for example oriented at the center point M0 of the lever end 171 of the release lever 17 .
  • one end of the compensation bimetal rod 300 can be rotated about the fixed pivot point M3, while the shaft axis 170 with the center point M1, which are articulated via the support part 310, are freely movable in the direction of arrow K.
  • the other end 305 of the compensation bimetal rod is slidably guided at the end M2.
  • This displaceability at point M2 enables control on the one hand according to the adjustable nominal current in which the contact point M2 is displaced by changing the position of the eccentric 620.
  • Another possibility of displacement in the direction of arrow K1 results from the fact that, by changing the ambient temperature when the eccentric 620 is permanently set, the compensation bimetal rod is Length changed and thus shifts its contact point to M2 '.
  • the arrangement of the uniformly curved compensation bimetal rod according to FIG. 26a thus fulfills both the task as a control unit and as a compensation unit.
  • the compensation bimetallic rod 300 is mounted in a double suspension, whereby the release lever can be moved from M1 to M1 'by the path K around the fixed pivot point M3, corresponding to the displacement of the other end of the compensation bimetallic rod 300 from M2 to M2' by the path K1. This shift can either be controlled or triggered by changing the ambient temperature.
  • FIG. 24 schematically shows compensation compensation when the ambient temperature rises for the compensation bimetal rod 300 according to FIG. 24a.
  • the support part 310 is carried along and changes the position of the release lever 17 at its other end via the shaft axis 170 attached thereto. This also makes the position M0 of the stop lever end 171 moved to M0 ', which corrects the release path, ie is compensated for according to the ambient temperature. This also applies to the other lever end 172 of the release lever 17.
  • the first link of the transmission device for triggering the auxiliary switch as a result of the bimetallic deflection forms a calibrated bridge system 200 with a differential bridge and release bridge made of two comb-like bridge parts and a hinged actuating lever 16 for the thermal relay according to FIGS. 2 to 6.
  • the movement triggered by the bimetallic elements is transmitted via the bridge system 200 to the actuating lever 16, which sets the trigger lever 17 in motion, so that it moves about its axis of rotation with the other end of the tension spring 125 and thus triggers the rocker switch.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)
  • Protection Of Generators And Motors (AREA)
  • Insulated Conductors (AREA)
EP89121794A 1988-11-28 1989-11-25 Thermisches Relais Expired - Lifetime EP0371416B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840063 1988-11-28
DE3840063A DE3840063A1 (de) 1988-11-28 1988-11-28 Thermisches relais

Publications (3)

Publication Number Publication Date
EP0371416A2 EP0371416A2 (de) 1990-06-06
EP0371416A3 EP0371416A3 (de) 1991-06-05
EP0371416B1 true EP0371416B1 (de) 1995-01-25

Family

ID=6368008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121794A Expired - Lifetime EP0371416B1 (de) 1988-11-28 1989-11-25 Thermisches Relais

Country Status (4)

Country Link
EP (1) EP0371416B1 (enrdf_load_stackoverflow)
AT (1) ATE117833T1 (enrdf_load_stackoverflow)
DE (2) DE3840063A1 (enrdf_load_stackoverflow)
ES (1) ES2068231T3 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007144049A1 (de) * 2006-06-14 2007-12-21 Moeller Gmbh Thermischer überlastauslöser für ein mehrpoliges elektrisches schaltgerät
EP2551885A1 (de) 2011-07-28 2013-01-30 Eaton Industries GmbH Übertemperaturschutzeinrichtung für ein elektrisches Schutzschaltgerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1588754B2 (de) * 1967-08-23 1970-10-08 Siemens AG, 1000 Berlin u. 8OOO München Elektrischer Selbstschalter
DE2262387C3 (de) * 1972-12-20 1978-08-31 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Thermischer Überstromschalter
IT8121367U1 (it) * 1981-04-02 1982-10-02 Sace S P A Costr Elettromeccaniche Interruttore elettrico
DE3305646C2 (de) * 1982-06-22 1986-07-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Thermisches Überstromrelais
FR2536905A1 (fr) * 1982-11-25 1984-06-01 Telemecanique Electrique Relais thermique

Also Published As

Publication number Publication date
DE3840063A1 (de) 1990-05-31
ATE117833T1 (de) 1995-02-15
DE3840063C2 (enrdf_load_stackoverflow) 1990-10-18
DE58908938D1 (de) 1995-03-09
EP0371416A2 (de) 1990-06-06
EP0371416A3 (de) 1991-06-05
ES2068231T3 (es) 1995-04-16

Similar Documents

Publication Publication Date Title
EP0174904B1 (de) Kontaktanordnung für Niederspannungs-Leistungsschalter mit einem zweiarmigen Kontakthebel
DE69406334T2 (de) Schaltgerät
DE69402907T2 (de) Mehrpoliger Schutzschalter mit modularem Zusammenbau
DE102009043105B4 (de) Elektrisches Schaltgerät mit einer Kontaktbrücke
DE20214209U1 (de) Doppelkreis-Schalteraufbau mit Überlastungsschutz
DE19818058C2 (de) Schaltgerät mit einer Schaltkammer-Baugruppe
EP0371416B1 (de) Thermisches Relais
EP0195816B1 (de) Bimetallauslöser
WO2007144050A1 (de) Thermischer und/oder magnetischer überlastauslöser
DE3840064A1 (de) Thermisches relais mit schaltwippe
DE3604014C2 (enrdf_load_stackoverflow)
DE2511510C2 (de) Elektrischer Installationsschalter
DE1126013B (de) Mehrpoliger UEberstromschalter
EP0556602A2 (de) Thermischer Auslöser für elektrische Schaltgeräte
DE3812934A1 (de) Mehrphasiger schutzschalter
EP0371415B1 (de) Thermisches Relais mit Bimetallkompensation
DE1084821B (de) Trennschutzschalter
DE3106004A1 (de) Leistungsschalter
DE19846219B4 (de) Stromschalter
DE10061783C1 (de) Verriegelungsvorrichtung
DE3840062C1 (en) Thermal relay having bimetallic compensation
DE870132C (de) Kleinselbstschalter in Sockel- oder Stoepselform
DE1003327B (de) Installationsselbstschalter in Schmalbauform mit magnetischer und thermischer Ausloesung und einem oder mehreren abschaltbaren Hilfskontakten fuer allgemeine Leitungsschutz- oder Spezialzwecke
DE2416153C3 (de) Selbstschalter
DE2857067C2 (de) Motorschutzschalter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB IT LI NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB IT LI NL

17P Request for examination filed

Effective date: 19911018

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KLOECKNER-MOELLER GMBH

17Q First examination report despatched

Effective date: 19940221

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950125

Ref country code: BE

Effective date: 19950125

REF Corresponds to:

Ref document number: 117833

Country of ref document: AT

Date of ref document: 19950215

Kind code of ref document: T

ET Fr: translation filed
ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 58908938

Country of ref document: DE

Date of ref document: 19950309

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950222

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2068231

Country of ref document: ES

Kind code of ref document: T3

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19951125

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19951130

Ref country code: CH

Effective date: 19951130

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20001109

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20011119

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011125

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20011125

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20021024

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021126

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20031107

Year of fee payment: 15

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040602

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050729

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051125