FR2527003A1 - BREAKER FOR THE PROTECTION OF LINES AND / OR APPARATUS FROM OVERCURRENTS AND SHORT CIRCUITS - Google Patents

Abstract

THIS CIRCUIT BREAKER 1 INCLUDES A MAIN CURRENT CIRCUIT 5 WHICH CAN BE CUT 8 BY MEANS OF A RELATIVELY FAST MOVING MECHANISM 7 RESPONDING TO A SHORT CIRCUIT AS WELL AS THROUGH A RELATIVELY SLOW MOVEMENT MECHANISM 6 . THE CUT ZONE 8 IS BYPASSED BY AN AUXILIARY CURRENT CIRCUIT 9 CONTAINING A RESISTOR 10 AND A SECOND CUT ZONE 12 WHICH CAN BE OPENED BY THE RELATIVELY SLOW MOVEMENT MECHANISM 6 AND OR BY A SECOND RELATIVELY SLOW MOVEMENT MECHANISM 11. FROM THE SECOND CUT ZONE 12 IS DERIVED A THIRD CURRENT CIRCUIT 13 TOWARDS NEUTRAL, WITH A THIRD CUT ZONE 14 COUPLED TO THE FIRST 8 AND WHICH CLOSES WHEN THE QUICK MECHANISM 7 CAUSES THE OPENING OF THE FIRST CUT ZONE 8 AND WHICH OPENS UNDER THE ACTION OF ANOTHER MECHANISM QUICK MOVEMENT 15 OF THE THIRD CIRCUIT 13 AT THE SAME TIME AS THE FIRST CUT ZONE CLOSES 8.

Description

2527003;

  1 - The present invention relates to a circuit breaker

  protection of lines and / or electrical appliances.

  against overcurrents and short circuits,

  which is selective with respect to protection systems

  against overcurrents and short circuits possibly connected upstream and / or downstream and which has a main current circuit which can be cut by means of a relatively fast movement mechanism responding to a short circuit

  as well as by means of a mechanism with relative motion

  Slowly responding to overcurrent.

  For such circuit breakers there is the possibility of

  A wide range of different applications They are particularly required to be used as group circuit breakers installed upstream of different connections each protected by a line circuit breaker in distribution installations, whether in sets of units.

housing or industrial.

  The selectivity of circuit breakers bridged in series in a distribution system is necessary

  or at least desirable so that in case of short

  circuit or overcurrent the feasibility of the distribution system, the one in which

  find the short circuit or the cause of the over-

sity, or switch off.

  This selectivity can be ensured without

  ficulty by means of fuses With regard to

  overcurrent selectivity is not a problem

  No more blemishes with circuit breakers.

  Most of the thermal factors incorporated in these circuit breakers and responding to overcurrent can

  without difficulty being adjusted to different

  rations, so that it is always the disjunction

  downstream and in the branch of which is the cause of the overcurrent which cuts the

  line before the circuit breaker connected upstream of it.

  However, in the case of a short circuit, there is a problem, because the rimagnetic triggers usually provided for this eventuality in

  circuit breakers and which must be particularly

  quickly can not be constructed of such

  so that we can be sure that the line is always

  days cut off by the circuit breaker installed downstream

then by the one upstream.

  DE-OS 2,525,192 discloses a solution which is certainly safe, but very complex and, given its cost, implemented only

  in the field of high intensity currents.

  The simpler selective circuit-breakers are the object of an evolution which has been concretized by the patent of the invention DE 2 854 623 and by the applications

  of the invention of Di-OS 2,854,637 and 3,021,867.

  All these solutions are based on the principle of closing one or more times, after it has opened because of a short circuit, the circuit breaker after which are connected other circuit breakers, this closure possibly

  repeated for the case where a disjunc-

  connected thereafter and downstream of which the short circuit would have responded; only after a certain number of closures and openings

  the upstream circuit-breaker remains defini-

openly.

  The problem which the invention has just brought a solution was therefore to create a selective circuit breaker, including a selective circuit breaker vis-à-vis circuit breakers installed after it (rear circuit breakers), which does not open and, if it is wish,

only closes once.

  For this purpose, the invention starts from a provision of the kind known in the preamble, described in the patent application DE-OS 3 021 367, and provides on the one hand that the cutoff zone of the main current circuit operated by the mechanism of

2527003 I

-3 -

  movement responding to a short circuit is contour-

  by an auxiliary current circuit having an electrical resistance and a second breaking area which can be opened by said relatively slow motion mechanism and / or a second relatively slow moving mechanism, and secondly that a system which when the short circuit

  stops before the opening of the second zone of

  pure, causes the closing of the cutoff zone

of the main current circuit.

  If there is a short circuit downstream of this circuit breaker, the main current circuit is interrupted at the cutoff zone operated by the relatively fast motion mechanism.

  responding to the short circuit However, in the cir-

  cooked auxiliary that cuts through this cutoff zone

  continues to pass a current, reduced by the resistance

  If a protective system

  downstream responds too, that is, if the location of the short circuit is isolated, this closed system

  the cut-off area of the main circuit, which

  blit the flow of current in this circuit Si 1 '

  short circuit is located upstream of the

  posterior junction, or if for some other reason the

  short circuit is prolonged, the cut-off zone of the

  The main current remains open. The increased current which, under these conditions, passes through the auxiliary circuit causes the opening of the second cut-off zone by the said relatively slow-moving mechanism or the said second relatively slow-moving mechanism. which also interrupts the current circuit

  the auxiliary, which no longer receives

  rant. Compared to the known solutions mentioned above, the fact that, according to the invention, the location of the short circuit is imreléliatement and-or by

  the circuit breaker according to the invention, either by the

  The circuit-breaker, which is following it in isolation, considerably reduces the conductors 2527003 of the installation and, in the case of a device protection circuit-breaker, the apparatus itself, and

  is also advantageous in other aspects.

  In addition, the protection circuit breaker according to the invention is selective to an unlimited measurement,

  because the response time of its moving mechanism

  can be adjusted according to the needs

  against, selectivity of circuit breakers

  known and also fuses no longer exists

  beyond some current intensity lilites.

  I breaker according to the invention can always be 9

  selectively regulated with respect to interrup-

  upstream fuses or fuses.

  In addition, the circuit breaker according to the invention can be built more simply and smaller than those known before. Finally, it can be

  also implemented for direct current.

  All this is valid both as regards

  the protectioon of the lines that that of the apparatuses.

  However, the invention still offers another possibility.

  In this case, in fact, the circuit-breaker according to the invention can also, and very advantageously, be installed at the tail end, that is to say without a downstream protection system. of which it would be selective: during the closing current pulse that it receives

  comine was a short circuit, it cuts everything

  For a short time, it can be used for a short time and can therefore be used for the amputation of the appliance in one measurement.

  more et-oite and therefore with a better e: f and pro

  detection of known protection and syrups which do not need to be selected as they do not respond to

  closing current shutdown.

  To achieve the dos closure closure of

  the shut-off zone of the main current cir-cuit

  %, several possibilities exist However,

  a particular achievement is Xeuse cons-

  the intention of the invention consists in

2527003 '

  In this culen downstream of the second breaking zone is derived a third current circuit towards the neutral or to the conductor of another phase, this third circuit comprising a third cutoff zone coupled to the first such that 'she

  closes when the relative motion mechanism

  rapid opening causes the opening of the first cutoff zone and it opens under the action of another relatively fast moving mechanism disposed in said third circuit, at the same time

  the first cutoff zone closes.

  If then the location of the short circuit is isolated

  by a protection system connected downstream, the

  voltage generation that otherwise is caused by the

  short circuit does not occur in the so-called

  the closed circuit when opening the first

  the first cut-off zone, and the intensity in this third

  sth circuit increases until the third cutoff zone is opened again by the said

  another mechanism with rapid movement and that is

  the first cut-off zone If the state of

  the short circuit continues, the third zone of

  pure remains closed, the first open The line

  is then, comne described, completely isolated.

  Instead of taking out the third circuit of cou-

  the energy required to close the first

  the first cut-off zone, one could also foresee

  other auxiliary current circuits or accumula-

  energy latters, or batteries.

  Cor Cnme slow-moving relaotive mechanisms

  for example, in the state of the art,

  current mechanism of rational mechanisms, whereas, as relatively slow motion mechanisms, it is possible, for example, to provide bimetallic thenrmic triggers which are made to act most frequently.

  through a lock lock.

  But all sorts of other organs can be envisioned. Mechanisms with relatively fast motion could be triggered by birqetal xel Aive ient r, -Lpid D-;

  they are relatively slow to

  They should be timer mechanisms with timers made of so-called alloys, etc. It is only possible that there is a response between the two mechanisms. He is at home and is at court at Li-eleven.

motivated, slow.

  If the capacity of the circuit breaker according to the invention is 1 a, 111-r-1; protection that it is u 3 to:, other or the fuse in relation to the scion must other selective, it is necessary in addition (Paleïl case of short-circuit

  the torirps of the kidneys of the reunion, and 1

  sees slow opening the second break zone

  or more, than the response tetips of the system

  protection system If the circuit breaker se-

  If the invention is to serve the purpose of protecting an apparatus placed in its wake, the response time of the slow-moving mechanism must be slow, which opens the second cut-off zone to be longer than the duration. of the pulse of couw, 1 nt of commissioning of said apparatus In this eyelash, a relatively fast movement in itself, such as a mesothelioma, equipped with a timer, is notnament for the said second mechanism is slow: such

offers a possible possibility

  the accuracy of the setting and, consequently,

  differentiated S tivity at will and ez-rgme-

  There is - when the - eipino

  the risk-taker be of the same mechanism

  TE 7 Diode and main circuit.

  This communication with quoted time-1-1 alternl-tif

  be bins on a half-wave counter system.

  resistinnco èlecûrique -lieux in principle be

  u-ie oleic, and,: 'or cnpaci-t-live.

  At o, 7 - An inductive resistor could be used instead of the mechanism with fast relativemenit movement of the main current circuit to trigger the

  timer as mentioned above.

  To the extent that no particular provision of the circuit breaker components according to the invention

  is specified, various possibilities are available.

  With regard to the said third circuit of

  it must be ensured that it is connected to the

  the driver to whom the apparatus to

  to protect himself is connected; it will usually be the neutral. If the relatively slow motion mechanism responds to a supe- riority cited in the first place, it must not actuate a separate cut-off zone outside the auxiliary current circuit.

  the main current circuit, but must

  milking act, as it is preferred, also on the so-called first cutoff zone, it is proposed

  according to the invention that the reciprocating mechanism

  latively slow first action operates in primary, preferably through a lock lock, the second cutoff zone which, in the normal state, is fúeruée, and that it is coupled to the di- the first cutoff zone so that it opens at the same time as the second cutoff zone Thus, the opening and the ferrmeture of the said first cutoff zone

  are possible, in a simple way in case of short-

  circuit, independently of the second zone of

  pure, that is to say when the latter is fer-

  and, despite that, the main current circuits

  pal and ariliary are both interrupted in case

overcurrent.

  e There is, however, the possibility of

  This is the case of a cutoff probe open in the normal state and which is only shown in the event of a short circuit.

  according to which the secoide cutoff zone is fer-

  Me-e in the normal state is certainly the simplest

and the silre.

  There is no doubt that the mechanism has moved

  - cn-L relntivenient slow quoted cry first place and ré'e iii-are

  at overcurrent on the pre -

  zone 1 e cut through lock

  in which are intergrated

  manual switch and / or a telephone switch

  glue their word 11-re 1 breaker according to the invntion

  at will on or off circuit The said se-

  corc 1 r (, eca-1-isy 11 e with relatively slow movement can ag, ir p, -r Ilinter-ciiLi-i-c of this -til Criie lock of

  011 may, however, pass during

  that, under the conditions laid down, the ill-mechanism at first mentioned in the first place could actuate the second cut-off zone of the inani'3 when Tly was not cut off by the

  protection device connected downstream.

  The circuit breaker according to the invention is particularly suitable

  ticularly to a remote control because it does not require This important forces to be operated so thee, the is possible with netits, -) had co-fteurCar given the salon design lliinrention of 1, 7, réfait tension lir: ccss Eilre for iron, Ier the contract

  of Conyr Pn 7 e said, that is to say the pre-

  The first area of the cuts is in any case

  wheat on the spot under any form.

of the third half-cut-off zone

  -vc that quoted in -first li ,, u ser 2 di-

  so that q 7 Li ,, which c 1 U, is the d- Uvo -, -Gnt, ltuile been cos

  or S-1 open when the - Butte will close.

  'Three, in the first place, where only ilidi-

  which defines the invention Coir-i 6 c, p 1 us

  h, 7 ut ir-irowto-nt for what can

to be sure that they are obtc.

-9 -

  Other features of the invention are

  in the description of examples of implementation

  made below with reference to the accompanying drawing; on the latter figure 1 shows the disposition of a

  junction device according to the invention in a distribution system.

  current scorer, Figure 2 is a circuit diagram of this circuit breaker,

  FIG. 3 illustrates a mechanical embodiment

  Figure 4 is a schematic diagram of the circuit breaker of another circuit breaker according to the invention,

  FIG. 5 is an assembly diagram of a third

  second circuit breaker according to the invention, and

  Figure 6 illustrates another form of

  concrete mechanical integration of part of the disjunc-

  2 according to the invention is arranged in a distributor system 2 between a protective element 2 which is also prior art

  a circuit breaker, and a group of circuit breakers 3 dis-

  placed downstream and followed by

  Electrical circuit breakers 4 Circuit breaker 1 must be selective both with respect to

  prior protection 2 upstream that

trunks 3 located downstream.

  The circuit breaker 1 is crossed by a main current circuit 5 in which are disposed a thermal trip unit 6 responding to an overcurrent, a macnetic mechanism 7 responding to a short circuit

  is a cutoff zone $ commed from

  thermal key 6 and by the mapnetic mechanism

  7 The latter and cut-off zone 8 is a contour

  born by an auxiliary current circuit 9 in the-

  which are arranged an electrical resistance 10 of for example 0.1 to 5 o 1 uls or can reach 10 olhmis for nominal intensities of 6 to 100 A, another - thermal actuator 11 and uie second cutoff zone 12, Downstream of cutoff areas 8 and 12 another current circuit 13 is derived to the

neutral conductor.

  The thermal trip unit 6 acts by means of a lock lock 16 on the second break zone 12. This lock is mechanically coupled as well as via another lock lock 17 to the breaking zone. 3, such that the latter can open or close irrespective of the second cut-off zone 12, but it also opens when this second zone opens. The second thermal trigger 11 also acts. through the lock lock 16, on the second

cutoff area 12.

  The magnetic mechanism 7 also acts mechanically

  as well as through the se-

  lock lock count 17 on the zone of

cutoff 8.

  The second magnetic mechanism 15 acts mechanically.

only on the cutoff zone 8.

  The third cutoff zone 14 is coupled to

  canicating to the cutoff zone 8 so

  that one opens when the other closes.

  Figure 2 shows the actual lines corresponding to

  7 punctures, tandlis that in FIG.

Elemen: mechanical factors concerned.

  As shown in Fig. 3, the manual mechanism

  grtlque 7 and the second mlagnetic mechanism 15

  turn with a different direction of rotation

  vier c two arms 19 which pivots 18 and carries at its end a mobile cortact 21 cooperating with

  ur fixed contact 20 I Parts 19, 20 and 21 con-

constitute the cutoff zone 8.

  The third cut-off zone 14 is formed by a solid-state contact 22 of a leaf spring -0 and by a solidified contact of a spring.

lamne 23.

  11 - the arrangement in space is such that in the position illustrated in FIG 3 in which the contacts 20 and 21 are touching, that is to say in the closed position of the cutoff zone 8, the contacts 22 and 24 are kept remotely one of

  the other, that is to say that the third zone of

  pure 14 is kept in the open position, whereas when the cutoff zone 8 is in the open position the end of the lever 19 applies one

  against the other contacts 22 and 24

  first remove the leaf spring 23 and then the

  fate at lsmze 40, so the third zone of

cut 14 is closed.

  By attraction of the magnetic mechanism 7 the lever 19 pivots senestrorsum, the cutoff zone 8 opens and, at the same time, the cutoff zone 14 closes If the second nmagnetic mechanism is excited, it recalls the lever 19 dextrorsum and closes the cut-off zone 8, together with

  the leaf spring 23 reopens the cut-off zone 14.

  At its end opposite the contact 21, the lever with two arms 19 meshes with one end of a second lever with 1 two arms 26 articulated at 25 and the other

  end is engaged in an eyelet or other par-

  tie (not shown in the drawing) of a bead wire

  27 that can slide longitudinally This trin-

* gle connects the cutoff zone 12 to the lock of ver-

  rust 17 that she releases when subjected

to a pull.

  In the same way, by means of a rod 29 which can slide longitudinally, but this time in compression, the lock lock 16 is releasable by the thermal actuator 6 as well.

  that also by the thermal actuator 11 The

  vertically the resulting cutoff zone 12 is

  symbolized by line of action 30.

  The drawing shows in which direction the links

  mechanical sounds described above are operative

2, 527003.

  12- or otherwise inoperative; it further shows that the muutual catch between the two levers 19 and

  26 is operative in both directions.

  Finally, the arrow 31 symbolizes the lock lock lock 16 of the United Kingdom.

a built-in manual key.

  I The normal flow of the current pcasse, when the

  cutoff zone 8 is closed, by the main circuit

  The flow of current which, simultaneously, passes through the auxiliary circuit 9 in which the

  cut-off zone 12, which is also closed, is

  was the result of resistance 10 The other cir-

  cooked current 13 is interrupted by the zone of

cut (open) 14.

  If a short circuit occurs, the magnetism mechanism 7 is excited and moves the lever 19 in the opening direction of the cutoff zone 8 In the same way, the tension exerted on the rod 27 by the intermediate lever 26 releases the lock

  lock 17 which promotes and accelerates the opening

  the spark gap 8 The spark caused by the separation of contacts 20 and 21 is

  in a fire-extinguishing chamber 32 of

  in which it is extinguished.

  bake of the main stream 5 is thus im-

  diatement interrupted, while by cii-buit 9 auxiliary passes only current significantly reduced. If the short circuit is in the conductor section between the circuit-breaker 1 and one of the circuit-breakers 3, the trip unit switches on, at the end of the determined period of time for which 1 is The locking lock 16 is designed by the intermediate rod 30, thus also opening the cut-off zone 12.

  circuit breaker 1 is then complete and defini-

tive.

2527003,

13 -

  If the short circuit is downstream of a

  line protection trunk 3 installed at the

  following circuit breaker 1, this circuit breaker 3 responds to

  typically as a part of the mechanism

  magnetism 7, but in any case still well

  having the thermal release 11, and isolates the

  right of the short circuit As a result of the increased voltage

  at the input of the third current circuit 13.

  In the latter, whose cutoff zone 141 was closed during the opening of the cutoff zone 8 as described above, go now

  a current whose intensity is such that the

  The magnetic response 15 responds and, through the intermediary Tre of the lever 19, closes the cut-off zone 8 and opens the cutoff zone 14.

  produced only in the last part of the reunion

  the end of the lever, namely when the spring at P e 40 is returned to its normal position and that, with the spring 23 continuing to return back, the contacts 22 and 24 separate one of the The magnetic mechanism 15 thus receives energy for a relatively long time,

so relatively a lot.

  Thus the normal state of the dis-

  line protection circuit breaker 1 All

  current users 4 other than the one in the branch where the short circuit is located

continue to be energized.

  7, n case of overcurrent whose cause is 3 downstream of one of the circuit breakers 3 installed after the circuit breaker 1, the latter opens immediately before the circuit breaker linlle 1 thermal triggers responding to overcurrent

  installed in circuit breakers 1 and 3 may

  9 be chosen with sufficient precision

  for their respective response times to

  are so different that they are selec-

14 -

  relative to each other.

  If the ca-use of the surint is located in

  the link between circuit breakers 1 and 3, the

  In this case, the thermal breaker 6 of the circuit-breaker 1 responds via the linkage of the linkage 29 to trigger the lock lock 16. This opens the cut-off zone 12 which, in turn, via the wire of the rod 27 , firstly by passing the lever 26 and secondly through the lock lock 17, moves the lever 19 and opens the cutoff zone 8 Egalemrent in this case the cutoff by the protective circuit breaker

line 1 is total and definitive.

  Similarly, this can take place in ac-

  the manual key 31 The closing

  The circuit breaker 12 is closed by means of the lock lock 16, after which the magnetic circuit 15 in the third current circuit 13 is connected, and as already described above,

  opens cut-off zone 14 and closes the cut-off zone

  pure 8 in the main current circuit 5.

  In the circuit breaker according to FIG. 4, on the

  which the corresponding parts carry the m Smaes markers that in FIGS. 1 to 3, the said second zone

  12 is constituted by

  intermediate taps to which said third current circuit 13 is connected. The electric resistance 10 is subdivided; its two halves 34, 35 are arranged resoectivezment before and after paired conbtacts In this embodiment of the invention the circuit breaker does not depend on the direction of connementementement said second cutoff zone is located both sides of the derivation; therefore, the latter is always downstream from the

  cut off the line portion that remains energized.

  Because of it? subdivision of the resistor into two partial resistances 34, and 35, a resistor -

  is connected upstream of the said other mar-

  relatively fast 15 in both directions.

reoccurrence. The circuit breaker according to FIG. 5, on which again the partios

  corresponding to the same reference numerals as in FIGS. 1 to 4, comprises, instead of the two thermal trip units 6 and 11, a thermal trip device 36 which, in the auxiliary current circuit, performs the functions of the two

  triggers on figs 1 to 4 The circuit of

  Auxiliary transmitter is connected between this trigger 36

  and the resistor 10, with the breaking zone 8 con-

  here as paired contacts In this solution the trigger 36 can be chosen more

sensitive.

  FIG. 6 illustrates a mechanical coupling such that the third cutoff zone 14 opens in the same way

time as the second 12.

  The arrangement of the cutoff zone 8 and the third cutoff zone 14 is approximately that of FIG. 3, but these two zones are here coupled by a rod 37 and the second cutoff zone 12 is arranged between the zones 8 and 14. and also connected to the third 14 by a trillngle

  38 the cutoff zone 8 and the second cut zone

  Pure 12 open and fernlent independantly the other, each f law alternately with the third cutoff zone 14 This provision has the advantage that a voltage reaching, in case of default for example em downstream of circuit breaker, to the main circuit 5 of this circuit breaker, can not cause current flow in said auxiliary current circuit 13 and can not by

  consume asleep the said other magnetic mechanism

  15 or close the circuit breaker

  same security is obtained with the

position according to fig 4.

-16 -

  It would, however, be fundamentally possible

  to permanently connect the said cir-

  atuxiliary current 13 with the said other

  Canism: Aetic 15 or other mechanism -

  The voltage drop which, in the event of a short-circuit, occurs at the input of the auxiliary current circuit 13 then weakens the closing force of the magnetic mechanism. and thus allows

  the opening of the zone of elbow of the circuit of cou-

  This solut ion would imply that

  times a permanent loss current.

  So that the response threshold of the said other

  My Cntic 15 can not be derived under the influence of temperature variations, this mechanism can be

  team of temperature compensation, by e: eu-

  of a CIT 'resistor in series with a winding

  Most importantly, in the case of resistance 10, when the fuses must be

  installed after the circuit breaker, must have a

  lume large enough to allow fuses

  to melt in a determined time

requested and guarantee selectivity.

  The circuit breaker according to the invention is

  In all areas of application, whether in residential homes or in industrial installations and whether for the protection of lines or appliances,

  voltage or voltages and relative intensities

brought up high.

  17 - RE Vr TDICATI Oe S 1 Circuit breaker (1) for lisn protection

  and / or electrical apparatus against superintension

  short-circuits, which is selective with respect to protection systems (2; 3) against

  overcurrents and possible short-circuits

  connected upstream and / or downstream and which

  carries a main current circuit (5) which can

  be cut by means of a moving mechanism

  latively fast (7) responding to a short circuit

  as well as by means of a mechanism with relative movement

  a slow circuit (6) responding to an overcurrent, on the one hand this circuit-breaker being remarkable in that the breaking zone (8) of the main current circuit (5) actuated by the relatively moving mechanism

  fast (7) responding to a short circuit is contour-

  generated by an auxiliary current circuit (9)

  carrying an electrical resistance (10) and a

  conde cutoff zone (12) which can be opened by said relatively slow moving mechanism

  (6) and / or by a second mechanism with relative motion

  slowly (11), and secondly that

  comprises a system (13, 15) which, when the

  circuit stops before the opening of the second cutting zone (12), causes the closure of the zone

  cutoff (8) of the main current circuit (5) '.

  Circuit breaker according to claim 1,

  in that a third current circuit (13) is derived downstream of the second cut-off zone (12) towards the neutral or towards the conductor of another phase, this third circuit comprising a third cut-off zone (14) coupled f the first (8) so that it closes when the mechanism

  relatively fast movement (7) causes the opening

  of the first cut-off zone (G) and that

  opens under the action of another mechanism

  relatively fast (15) arranged in the said third circuit (13), in mt time as is done

  the first cutoff zone (8).

  3 'Circuit breaker according to the reveiidic,, -tiort 1 or 2, rci Pnrqu, -b'Le in that the rileol-ilisr 4 the rebie -iIit rebtive -c- ent slow (6) cited first acts also on the so-called first cutoff zone

  (8) and -, in the second zone of

  pure 12) which, in the nori-mal state, is closed, and in that it is; coupled (RD, 19, 25 to 27) to the said cut-off zone (8) such that it is SIOUV-2 -er, mey-le than the second

Oe sewing area (12).

  The circuit breaker according to any one of the

  D-r-Ge Uenteo, rc- - ,, rquablc in that the mechanism relatively slow (6) ci-lÉ in the first place and responding to an overcurrent

  and / or the (Ut Second with relative movement

  Slow operation (11) 's act on the first cutoff zone (8) P'7' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' A real switch (31) and To switch the circuit-breaker (1) on or off, Selo-n-Lir-o circuit breaker can be used.

  2 to 4, recognizable in that the third

  SiC area CG cutoff (the ',) is coupled -to in pre-equilibrium

(8) directly -ri-recomni-

  6 msgonctor solo-n any of the re-

  What is the Third World?

  if the cut-off zone is coupled (3 (1) to the se-co-lide cut-off zone (12) so that it is directly

  opens this seco-a This cutoff zone.

7 according to any of the

  3) 5 v N c-tions 2 to 5, reachable in that the se-

  The cut-off zone (12) is formed by middle-tapped paired contours for the derivation of said auxiliary current circuit (13), and

  what the said resisted this electric (10) is sub-

  divided preferably into two resistors (3,4; 35) arranged on either side of the twinned contacts

  (12) in the auxiliary current circuit (9).

  to a circuit breaker according to any one of

  previous vendications, remarkable in that the said first cutoff zone (8) is constituted by celos môédiane connected twin contacts connected to the auxiliary current circuit (9) at a location, considering the direction of the course, d ' a part downstream of the relative mechanism

  circuit (36) arranged in the current circuit

  and on the other hand, in the face of resistance

  (10) and the second cutoff zone (12).

  Circuit breaker according to any one of the

  previous vendications, remarkable in that said other relatively slow moving mechanism for opening the second cutoff zone (12) comprises a relatively fast motion mechanism in itself with a timer preferably triggered by

  the mechanism of motion cited in the first place (7).

  Circuit breaker according to any one of

  veudications 2 to 9, remarkable in that said other mechanism with relatively fast movement (15)

  has a temperature compensation electromagnet

  frame, preferably an electromagnet with

  of copper wire connected in series to a

  sits on Ci T (Temperature Coefficient).