EP0159598A2 - Relais thermique à courant excessif avec étrier d'ajustement - Google Patents

Relais thermique à courant excessif avec étrier d'ajustement Download PDF

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Publication number
EP0159598A2
EP0159598A2 EP85104125A EP85104125A EP0159598A2 EP 0159598 A2 EP0159598 A2 EP 0159598A2 EP 85104125 A EP85104125 A EP 85104125A EP 85104125 A EP85104125 A EP 85104125A EP 0159598 A2 EP0159598 A2 EP 0159598A2
Authority
EP
European Patent Office
Prior art keywords
adjusting
overcurrent relay
housing
thermal overcurrent
trigger slide
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.)
Granted
Application number
EP85104125A
Other languages
German (de)
English (en)
Other versions
EP0159598B1 (fr
EP0159598A3 (en
Inventor
Karl-Heinz Lehmann
Friedrich Wink
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Brown Boveri und Cie AG Germany
Asea Brown Boveri AG Germany
BBC Brown Boveri AG Germany
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 Brown Boveri und Cie AG Germany, Asea Brown Boveri AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT85104125T priority Critical patent/ATE65641T1/de
Publication of EP0159598A2 publication Critical patent/EP0159598A2/fr
Publication of EP0159598A3 publication Critical patent/EP0159598A3/de
Application granted granted Critical
Publication of EP0159598B1 publication Critical patent/EP0159598B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7445—Poly-phase adjustment

Definitions

  • the invention relates to a single-pole or multi-pole thermal overcurrent relay arranged in a divided housing with a tripping slide actuated by one or more tripping bimetallic elements which, in the form of a comb or ladder, slides in a guide provided for this purpose in the housing.
  • overcurrent relays are used to protect electrical components, e.g. Electric motors, before overloading due to impermissibly high power consumption.
  • a multi-pole thermal overcurrent relay which, arranged in a divided housing, has a tripping slide actuated by tripping bimetals and a switching mechanism which engages with it.
  • each deflection of the bimetals is to be assigned a specific value of the current intensity in accordance with the distance traveled by the trigger slide. This relationship applies as long as the geometric conditions remain the same, i.e. As long as the position of the trigger slide with respect to the guide in the housing or the bimetallic elements does not change and no additional forces are effective, the value of the overcurrent is triggered and the current is interrupted.
  • the trigger slide can be inadmissibly large and can result in its tilting, tilting or jamming.
  • Such a fault inevitably leads to a falsification of the tripping characteristic of the overcurrent relay, i.e. that tripping only occurs when the current strength is impermissibly high.
  • the object of the invention is to avoid storing different trigger slides and to simplify the adjustment process by using suitable means.
  • two adjusting elements are arranged at a distance from each other so that with their help an exact adjustment of the height play of the trigger slide is possible by raising or lowering one or the other end or both ends.
  • the adjustment of the height play of the trigger slide is carried out by means of two rigid brackets as adjusting elements which are displaceably embedded in the housing.
  • a displaceable bracket instead of a displaceable bracket, one can be provided in which the adjustment of the height play of the trigger slide by plastic Deformation takes place by means of bending. For this purpose, a wedge-like tool is pushed between the trigger slide and bracket, and thus the bracket is bent back until the dimension specified for the permissible play is achieved after removal of the wedge-shaped tool.
  • a housing 10 is shown schematically with a rectangular cross-section, in which a limited to the side and down by the housing wall 12 Partial trigger slide 14 is inserted so that it is guided in the axial direction by housing webs arranged to separate three trigger bimetals 18 with heating conductors.
  • the one-piece trigger slide 14 which rests like a ladder with its three connecting webs 26 at the free ends of the release bimetals 18, slides on the underside 20 of the housing and is thereby supported by two adjustment brackets 24 arranged on opposite side walls 22 with a nose-shaped bulge, in short nose 25, in its height play "A" limited.
  • the brackets 24 are guided in a T-shaped groove 23 which is formed in or integrally with the housing side wall 22, with expansion brackets 42, 44 provided in pairs one above the other at the guide end 40 of the adjusting bracket 24 clamping in the groove 23 and effecting a non-positive fixing of the adjusting bracket 24.
  • a vertical slot 21 can be provided on both sides in the housing side walls 22, as shown in FIG. These slots 21 lie opposite the end faces of the trigger slides 13, 14, 15 and permit visual and / or mechanical control of the height play "A" in the assembled state of the overcurrent relay.
  • a lower stop 27 can be provided to limit the sliding path of the adjusting bracket 24 downwards, which is designed so that the adjusting bracket 24 only in the region of the guide end 40 touches the stop 27, so that the cantilever arm with the nose 25 is free, ie unloaded from the stop 27, and frictional engagement with the upper edge 36 of the slide.
  • FIG. 2 shows a variant of FIG. 1 with a divided trigger slide 15, 16 as in FIG. 1.
  • This trigger slide is composed of two congruent parts 15, 16, which have a strip 13, 17, on each of which three webs 30, 32 are integrally formed , wherein both parts 15, 16 are arranged mirror-inverted to each other, so that the free ends of the webs 30, 32 on the reverse side of the opposite part 15 or 16, on which the webs 30, 32 are formed, are slidably movable in the direction of the longitudinal axis of the bar .
  • Their relative movement to one another is limited by a connecting bracket 33 connecting them, which is fastened in two joints of the bore 34 and the elongated hole 35, which serves to compensate for travel.
  • the adjustment brackets 24 are fixedly attached in the side walls and their support points 25 are brought into their end position in relation to the trigger slide 15, 16 by means of a wedge 28 pushed therebetween. The wedge 28 is then removed.
  • a top bracket 24 is shown in the position in which it is inserted into the groove 21.
  • expansion tabs 42, 44 are provided in pairs symmetrically to the longitudinal axis, which on the one hand prevent tilting in the groove 21 and on the other hand fix the adjustment bracket 24 by non-positively locking against the wall of the groove 21 invest.
  • the expansion tabs 42, 44 are pre-bent from the flat guide end 40 in the direction of the nose 25 and ensure such exact guidance.
  • the flat guide end 40 has a contact surface 46 which is convexly curved in the direction of the bracket, the upper end face of which serves to support the contact surface for the tool with which the bracket 24 is pushed into its end position enlarge.
  • This movement is transmitted from the transmission bracket 33, which connects the two parts 15, 16 of the divided trigger slide 15, 16 to one another via the joints 34, 35 in the design of overcurrent relay with phase failure protection, to the switching mechanism in the other housing half, which results in the switching off of the current leads.
  • the release slide 14, 15, 16 can tip as a result of excessive clearance A, as a result of which additional forces which must be overcome by the release bimetal 18 occur.
  • the use of the two adjusting brackets 24 is provided, which are slidably mounted within a T-shaped groove 21 arranged in or on the wall 22.
  • the stirrups are shifted towards the trigger slide until their support points 25 touch the trigger slide 14. Then they are opposed moves until the permissible dimension A is reached.
  • This dimension A is synonymous with the permissible height play.
  • a lower stop 27 can also be provided, against which the adjusting bracket 24 is displaced, it being ensured that the nose non-positively acts on the upper edge 36 of the slide.
  • a correspondingly dimensioned plate can be inserted beforehand between the nose 25 and the upper edge of the slider or subsequently inserted through the slot 21, so that the bracket 24 plastically deforms, and after removing the plate, the arrangement has the specified play.
  • the displaceably attached adjusting brackets 24 it is also possible to firmly position the brackets 24 in the housing wall 12 and to press them against the upper edge 36 of the trigger slide so that they have 25 non-positive contact at their support points. A wedge-shaped tool 28 is then pressed between the upper edge 36 of the trigger slide and the support point 25 of the adjusting bracket 24 until the permissible height play A is established. The resilience of the adjustment bracket 24 is to be considered here. After the setting, the tool 28 is removed again.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Protection Of Generators And Motors (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP85104125A 1984-04-21 1985-04-04 Relais thermique à courant excessif avec étrier d'ajustement Expired - Lifetime EP0159598B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104125T ATE65641T1 (de) 1984-04-21 1985-04-04 Thermisches ueberstromrelais mit justierbuegel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843415226 DE3415226A1 (de) 1984-04-21 1984-04-21 Thermisches ueberstromrelais mit justierbuegel
DE3415226 1984-04-21

Publications (3)

Publication Number Publication Date
EP0159598A2 true EP0159598A2 (fr) 1985-10-30
EP0159598A3 EP0159598A3 (en) 1987-09-16
EP0159598B1 EP0159598B1 (fr) 1991-07-24

Family

ID=6234249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104125A Expired - Lifetime EP0159598B1 (fr) 1984-04-21 1985-04-04 Relais thermique à courant excessif avec étrier d'ajustement

Country Status (3)

Country Link
EP (1) EP0159598B1 (fr)
AT (1) ATE65641T1 (fr)
DE (2) DE3415226A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548479A1 (de) * 1995-12-22 1997-06-26 Siemens Ag Thermisches Auslösesystem
DE19949530A1 (de) * 1999-10-14 2001-04-19 Abb Patent Gmbh Führungselement zur Führung eines Auslöseschiebers für ein thermisches Überstromrelais

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19938965A1 (de) * 1999-08-17 2001-02-22 Abb Patent Gmbh Auslöseeinrichtung für einen elektrischen Installationsschalter
DE102008031894B4 (de) * 2008-07-08 2014-03-13 Abb Ag Elektrisches Schaltgerät mit einem thermischen Auslöser

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3168355A (en) * 1961-01-09 1965-02-02 La Vern E Rudolph Slide assembly for sliding doors
US3226845A (en) * 1964-02-20 1966-01-04 Ausnit Steven Sliding fastener strips
DE1982490U (de) * 1968-01-26 1968-04-04 Stotz Kontakt Gmbh Mehrpoliges, aus zwei uebereinanderliegenden teilen bestehendes thermisches ueberstromrelais.
GB1250773A (fr) * 1968-11-23 1971-10-20
GB1536197A (en) * 1976-02-25 1978-12-20 Cutler Hammer World Trade Inc Electrical overload switching relay
DD159662B1 (de) * 1981-06-15 1988-01-27 Pentacon Dresden Veb Kompaktes parallelfederndes fuehrungsbauelement
DE3401901A1 (de) * 1984-01-20 1985-08-01 Brown, Boveri & Cie Ag, 6800 Mannheim Thermisches ueberstromrelais mit justierexzenter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548479A1 (de) * 1995-12-22 1997-06-26 Siemens Ag Thermisches Auslösesystem
DE19548479C2 (de) * 1995-12-22 1999-09-02 Siemens Ag Thermisches Auslösesystem
US6014803A (en) * 1995-12-22 2000-01-18 Siemens Ag Thermal triggering system
DE19949530A1 (de) * 1999-10-14 2001-04-19 Abb Patent Gmbh Führungselement zur Führung eines Auslöseschiebers für ein thermisches Überstromrelais

Also Published As

Publication number Publication date
EP0159598B1 (fr) 1991-07-24
ATE65641T1 (de) 1991-08-15
EP0159598A3 (en) 1987-09-16
DE3415226A1 (de) 1985-10-31
DE3583522D1 (de) 1991-08-29

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