DE1905505A1 - Residual current relay - Google Patents

Description

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There is a known f Glilstron relay (danisfenes Bateiit 91184) ί das nacn dem Biff eten ^ ieneiungs ^^ ihaap arböitel; öjjezieli fiir Weeiiselstron suitable ISTY Daae afeei * also fy GieichstroEi can be used · Dieseä Relaiis Jbertdit the application of a Elektromagneteö which is polarized with eiiieia mägnejb ^, land the Röläis is therefore aäiar a Gleichströii in έ inen Richtiing körxelfet

i is _; the purpose of the invention; uiJt Ä ^ dä # near Weenseistroiä © | er feiaiet

Kern leine Wieifcioäni

i, mk -fesiÄ- f

Aiiisiip se organ νόη :.

WechsetL3trbmsignai "to the triggering organ" causes} so this due to the aerideruiig is triggered. if there is a trailing current fault current in an alternating current network, this will change the working point for the core of the Sumaehtransfornätors, and there will be a change of the alternating signal to the triggering device, so that this' is caused to trigger due to the change. If the relay is used with eiridm "direct current network, and there is no PehleiJroni is due to the alternating current an alternating current signal in said winding caused to the trigger organ of a certain size. if if there is a DC deficit, the operating point for the core to be changed, and the alternating current in the Winding becomes an alternating troinsignai zuä triggering organ of cause a changed size, so that this can be read out: "is brought due to the change.

The relay can be set up as specified in claim 2: gohass ^ of the invention. As a result, the two windings will act like a primary winding and a secondary winding of a transformer. However, it will also be possible to use a single winding on the core of the summator, - in which case this winding is partly connected to an alternating current, partly used as a signal winding:, -, · , - ■ _ ■. .....-.'.-. ■ -. ^:

....- ο -Vfß relay can, according to the invention, as indicated in claim 3 .eereinrichtungen be. As a result, very -cm ^

be eäimti , especially when the H ^ large and

Phase wieida ^ irön iäsr SigÄalwickiuiig ^ ä'given signal has.

909847/0428

The relay can according to the invention as in claim 4 specified. In this way, an advantageous reference signal can be obtained in a simple and permissible manner can be achieved.

According to the invention, the relay can be set up as specified in claim 5. This allows nan a very Enpfinciliches relay started inden the reference signal and the signal of the signal winding in normal states is mutually exclusive balance. . ·

According to the invention, the relay can be set up as specified in claim 6. It makes it an easy one and final construction achieved.

The relay can according to the invention as in claim 7 specified. This results in a particularly simple construction.

According to the invention, the relay can be set up as specified in claim 8. This results in a simple and inexpensive construction which can have significant advantages, which are explained in more detail below .

The relay can according to the invention as in claim 9 specified. As a result, a particularly simple construction is achieved where the emission of alternating current n with incorrect frequency to the network is not risked.

The relay can according to the invention as in claim 10 specified. As a result, a relatively simple and cheap construction can be achieved in which an advantageous adaptation of the YtT Wechselstrones to the winding can be achieved.

9098.47 / 0429

The relay can according to the invention as in claim specified. This allows an advantageous adaptation to achieve great sensitivity of the Relay can be reached.

The relay, according to the invention, can be set up as specified in claim 12, when the triggering element is adjusted according to the frequency in question, a reliable function can thereby be achieved. The relay can thus be set up according to the invention as specified in claim 13 to achieve this purpose « ,.

The relay can according to the invention as in claim 14 This means that an alternating current can be achieved that is completely independent of any Exchange trönon is in Syston. The relay can as a result of the Invention as specified in claim 15 to be set up «This is a simple and cheap implementation of a Relay reached that are used for a DC network can.

In the drawing, the invention is illustrated atiaoh, meanwhile

Fig. 1 shows a conventional Fehlstron relay, used in connection with a Weohselstronnetz and a Yfeehaölstranverbrauehsapparat,

Fig. 2 the same defect: tromrelaia, used in connection with a electricity supply, a rectifier and a electricity consumption device, 3 % η§. See Etatisoh »where there is an error relay. is attached as shown in Figures 1 and 2 and wq are supplied by these three electricity consumption devices.

of what, who has one a ^ leichxiohter *

4 shows a diagram of the variation in the tripping stress ν with a g-leiehstron going through the missing door relay, - ■. "_" · ■ "■" -.

5 shows a Fehistron relay according to the invention, applied "" in connection with a single-phase exchange straw-- '

net, '"-" "■

Fig. 6 a Fohlstron relay according to the binding of one

other embodiment, - · .- ".

7 shows a Fohlstron relay according to the invention of one

third embodiment, and - .'J

8 shows a Fehistron relay according to the invention of one fourth embodiment.

The inFig. Fehistron relay shown in FIG. 1 has an annular magnetic core 1 through which three phase conductors and a neutral conductor are led to a three-phase alternating current consumption device 2 which has an earth connection line 3. A signal winding 4 is attached to the core 1, which is connected to a trigger element 5 which operates the circuit breakers 6 which are inserted into the three phase conductors and into the neutral conductor in front of the core 1. The supply network is grounded by a ground line 7. A Y / echselstronableituhg through the line 3 causes imbalance in Sunnenstron; through the core 1, so that the winding 4 triggers the tripping element 5. In the event of a direct current through the line 3, the resulting Sieichötrori: the core 1 does not induce a current in the winding 4 and therefore not a signal to trigger the triggering organ 5, but the gtieichstron through the core wii * ä: ^J "cause a change in the working point for the Sunnentrana— '^{; v χ} · ^ ^χ}

Alternating current derivation through which line 3 is required and the .A, ^u ^ l.öseorgan 5 to trigger.

If the Suiamentransfornator is connected as shown in Fig. 2 to a rectifier 8, which feeds a DC power consumption apparatus, the risk of such a gloichstron leakage to earth "is particularly great, while the danger of an alternating current leakage is low. The Fohlstron relay shown is not for such a , circulation adapted _by, for DC discharge to earth, will not turn off.

In Pig. 3 a fault current relay 10 is attached like the fault current relay 1,4,5 »6 shown in Figs. while the third party 14 consumes direct current and is fed by a rectifier. The three apparatuses 12, 13 and 14 are each grounded for themselves. If there is a direct current discharge from apparatus 14, the Fehlstron relay 10 will not respond. A direct current will pass through the core of the relay 10, which causes a premagnetization of the core, so that its operating point is shifted. The effect of this is shown in FIG. 4, in which the direct current passing through the core is entered in the abscisseri, while in the ordinate direction. the required error exchange tron for triggering the triggering organ s 5 is entered. The error change current necessary for triggering, when the direct current error _r ■., _V ..., "str, pn _{; is} zero, is given by In. One will see. _ <Ias.s _; ^ stron to trigger the ^ AU.S - ,,,;, Xq§e organss with the Pehl direct current Idc rises sharply

SO 98..A 77 04 Ü

a mismatch is done from apparatus 14 and the operating point for the core 1 is shifted So a bigger erroneous exchange elstrron lead from apparatus 12 or 13 or both are required before relay 10 responds, and so these devices are not as good as expected in consideration of the non-linear tripping equal change trone In protected. As a typical case • it can be mentioned that In is 30 milliamps and that of Apparatus 14 a direct current discharge to 1 amp, happens, and in this case, an alternating missile of over 1 wire required instead of 30 milliamps. In such a case would destroy the protective effect of the relay be. If the devices are manually operated and do not have a special earth line, e.g. transportable devices. .

The Fehistron relay according to the invention shown in FIG. 5 likewise has an annular magnetic core 1 and a signal winding 4 which is connected to a trigger element 5 which operates the circuit breaker 6. The core 1 also has an auxiliary winding 16 which is connected in series with an input winding 17 of another transformer which has an annular magnetic core 18 and another winding 19 which is connected in series with the signal winding 4 and serves as a reference signal winding , and nit the tripping organ 5 is connected in such a way that the "two Signalwickiungen 4 and 19 are in opposite phase". The two ¹ 'in ^"series: connected windings 16 and Ϊ7 be nit V / ecnselström'""" fed "20 in gezej ^ en case by Verbindung'nit Nets two conductors through a resistor are the Awei 'frötzleiterh nit one or nehreren devices not shown connected,

f \. ' - 19055Q5

which are to be protected by the residual current relay. Ede two power conductors are horny through the magnetic core only two butcher's leather shown * -but the heiais is on the same Way "work with four conductors of a three-phase network.

The alternating tron through the "two windings 16 νούά 17 causes indiction of equally large alternating currents in the windings 4 and 19, but since these windings are counter-coupled, this causes no signal Happening to the consuming apparatus, the currents become in the two. Heretical ladders be in balance, and none comes. Signal for triggering device 5v If a Weehselstron discharge occurs and that a. resulting Wechselstron by άοΐΐ ,, core "causes dixsser Wechselstron a change in the signal of: Signalwiekluijg 4, aiber not a change of the signal of the Eeferenzsignalwicklung 13 _r and therefore, it produces a signal to the shutter 5 AuslBsiung" If a & leichstro.nalileitung and danit rB suiter ender Gleiöhstron through the core. 1 results "" causes this Gleiehstroa a shift of the: working point d; es fransforBators 1,4 ^ 16 »ctber: nieht des fransf ornatörs If '> ■ 18. ,, 19, · and there is therefore "a sub-diode" between the signals, the signal winding 4 and 1 of the reference signal winding 19, so that a negative signal for the triggering of the trigger 5 is created.

Bie, in, fig. & Shown © Codification · corresponds mainly to the lehlstron relay shown in fig * 5. The two cores 1 and 18 are replaced by a core which two - Ooffnungen 21 and 22 has to form two ring-shaped cores 23 and 24 ,, where the signal winding 4 is attached to the core 23, while the reference signal winding 19 onto the. Core 24 is attached * The two windings 16 and

ίο TSC

17 are from. one-single, winding 25 replaces, the; VerMnidun ^ feeil angefeaeirt on 'deitr between the _{two-Qedffnungen:;} is; t; and therefore gene insan is for "both; cores« Bie! winding; .-. Eg- -'- ■. " : is through the resistor 20 nit the, two Netzleitera ;. connected, and these are through the opening 21 g ^ fufet * Bas in Fig. 6 shown relay functions in essentially the same way as: in: Fi ₁ C. 5 shown *, ■ .- "■ ; -

Instead of two ketslaiters as shown in Fig. 5 and 6, three other ladders can be used; his .. iters put the weckselstrcn to the. Windings 16 and 1 | ο the '25 directly from a ladders through a vifiderstaBd afeziiileite ^; p;, i can derive it by means of a transformer will, however, be au.ch nöglich that Kelais & ZvT use - where the ladders Metz aureh also d 1 nuclear barren 23 are performed in this, case e sondere yechselstronqiuelle you came to power the V / liefelnpg ^ s, _.IS:; and. IT or 25 werderit öaei? E ^ karm _: eiii WeeEtggfc stroagenerator be applied.,; - _: dex? - Eti "fe (& ßidas ^ m $: M ^ is fed * between the SignalwäekJ | xiitgen'4, ^ 19i. Tuffiä , äem ^ "itoslGftseorgan 5 can § ± tl

Bas in Fig .; 7 shown .Relaii |, hÄlr eiEten: Erator core 1 ait one _: iignal wie; klTjng _: 4, or Eleane zu e iii
other- far, inal to,
Ber; ,other; Teniinal

lo

SAD ORlGiNAL

whose two terninals are connected to the two mains conductors. A constant alternating voltage goes into the winding 26, which induces an alternating voltage in the winding 4 ″ through the core 1, which is _{superimposed on the voltage derived from the mains in circuit 4 9} 5. The two windings 26 and 4 are preferably like this adapted that, if there is no ehlstron in the two network conductors, no current ir. ¹ , ilruis -1,5 .'-; right. If an alternating histron arises in the network loitom, a current is generated in winding 4 to trigger the The tripping element 5 induces switching off of the circuit breaker 6. If a DC fault current occurs, the operating point of the core 1 is changed, so that the alternating voltage induced by the winding 26 in the winding 4 is changed, so that the tripping element 5 is activated The two circuits, or 26 and 4, 5 ”can possibly be fed by a special generator. In this case, the relay can be used to monitor a direct current tzes are used. ·

-. The relay shown in Tig «. -8 has a buzzing transformer core, 1 _{: with} a signal winding 4 and a trigger element 5. The signal winding, 4. is .in ,, a bridge coupling or -schalirirngzusaTmen-nit- .a capacitor 27 and three Y / iderS'tgnden- 28 _;> : 29 and 30 - aaagebrapht. The trigger organ. 5 iat in. The bridge, betw.isehen-deaa both. Sides of the, · coupling ■, attached-, while a.V / echsels.troictgeiieriatqr ^ 3,1. aits ,, dsn ,, / _v En ^ p.ii .; der., bridge coupling, is connected.-Di © 23; i!. ¥ in, dr. 30'r are preferably .so
not; Eehlstron in di.e network conductors'

BATH ORIGINAL

to trigger element 5 received. The Wechselstron through the winding 4 "causes Wcchselmagnotisierung the core IV When a WechselfehlstroEi goes into the power conductors, is _in;. .A of, winding 4 / AC voltage induced to that, a .., From Zero s different. signal initially triggering organ.- 5; _loading:, acts when in the Netzl.Git, ren a Gleichstromfehlstron goes ,, this causes a Gleichnagnet · is ie tion of the core 1, whereby the self-induction of the winding 4 is reduced, a will cause a signal different from zero to the trigger element 5. The relay can be used to monitor a Gleichetrorinetzes or an alternating current. The generator 31 can possibly be fed from the network. It is also possible to allow the generator 31- "," when the ends of the bridge coupling are connected to the mains conductors. * ^k '''

The shown "and Äusfuhrungsförnen described are"'only be considered as examples, indention within dös'"Rahnens thought of the invention different variations, · ', can be _*; Where.' Applied a special generator, is: · ^ is this. to deliver V / echselstroäV ^ nit.a ^ frequency ■■ ^{; be} set up "which can be much higher" -ecls -the frequency ^{v of} the network, e.g. several times as high V :: ^ -; - ■■ · 'ir _: -s ~: _ ^ Γΐ ;: " ^iV

Claims (1)

13. · ■: ■ 19 & 55.0-5 Claims. 1. -Peiilstroiirelais nit a Sunnentransformat'or nit an iron core tind a "signal winding, 'which is connected to a tripping element, thereby. G; ek en η z" e lohne t, "that" on the. A winding is attached to the core, which is connected rii tr to a ¹ ^ ec ^ selstrpnguelle. 2. Fehlstronrelais according to claim 1, characterized in that g. e k e η η ζ e i c h η e t that the grain is a separate ' Signal winding (4), as well as a separate auxiliary winding (16,25,26) ,, which is connected to a source of electrons. 3. Eehlst ^ onrelais according to claim 1, ο the, -2 _ä thereby ge k e nn ζ ο I η et that, it nit the. V /: echsels, trong_uelle yerbundiene organs for. Generating an alternating current signal that _i nit .d.en. Trigger organ (5.) as _: a reference signal is connected. , _v,. . ,. _: . . . 4. Pehlstronrelaisnaöh: claim 3? "Thereby ge - ^: *" k en ή, ζ e, i C ₁ h .ne t_ that.-there is a reference signal winding; (19) haty ^! the diersecondary ^ winding of a ^ i ^ fstransforna- 'tor, s: ausra £ icht, whose erinarwipkiung. Ο17;> is fed 25) from the Qleichstronq_uelle if "- ^■:; .- · ";. · ■ .: ^; .--."":." ■ \: ..- ^ ■■ -.,; -.r .: ■ '■ ...'-.: - 5. i'ehlstron relay. features according to claim 3 or 4, characterized _e g that the organs are adapted to generate the reference signal to give a reference signal, the ann'aherungßweise the same size. like the signal that is generated in the signal winding (4) by the AC source, and with the trigger element (5) ₁₄ ■ ■ 1SQ5 505 in opposite phase to it, is connected. 6. Fahistrorireläis according 'to claim 4 "W ^ ¹¹ ^ 5 * ■ by" ^ -beta ^^; ^{^:;} -ke η η ζ η et verifiable that d; ^ Le HJLlf swicJklung :. (16>2;5;) des. S.unnentran ^ rriators and the ^ -Ermär ^ icklung. (17j 2.5). Of the auxiliary s-. Transfornator, s in _: row not connected sirid; _r imd-that; ^ the reference signaJ ^ ickluiig (19;) and the signal ^ c ^ ung ^. (4). in series and: antiphase ni t each other, connected .. -. . .. 7. Fehlstrqnrelais according to Anspru.öh 4 and 5, - thereby; G. & -f "- . ^νϊ · ke η na, ei .c hn et,. that, d; tr SunnentransfornatGX and ^ -r the auxiliary transf.o]? nator. a common core ni" | two;, . j .... have magnetic circles (23! -2,4), of which, one. ^ 23.) forms the, .... core for the solar transformer, while the other ^. . (24) forms the core for the ^ ilfstransfornato ^, and that the auxiliary winding (25); is attached to a common part of the two magnetic circles, while the signal .'-.; - 'winding (-4) on the S.unnentransfoma.tQ; r.kreis (-23) ^ and the reference signal winding C19.) on, ^ en; H ^ Ifstr ^ s ^ & rsa ^ Q ^^ ei ^ - ^ (24) are attached, the signal winding (4) and the reference signal winding (19) in series and antiphase nitegL-nander. are connected. 8th/. EehlstrourelaiS; after one or more of the ^. A ^ s ^ rüche _r 1-7;, thereby identifying η et. "That, ^ the exchange current to the Wiclclun. ^. Attached to the S.un.nentransforna ^ or is derived from He% z _: which is led through the d [a9!, Ehlsl ^ on.-; relay . 9. Fehistron relay naiQh claim 8 _r characterized ge fee η η, characterized in that the ierninalen d ^e r winding ^ 1.6 ^ 23 ,, 26) nit two through the relay ^ ^ power lines are connected, "preferably by-a. -Resistance- (20)., ICU 'PohlstroLirelais according to claim 8, -durch- gek ο η η ζ ei ch η et that'die ternirials of the winding * nit "connected to the terminals of a secondary winding" of a "special transformer ^A " which has a primary winding > -whose Terni Nalen nit two relay led \ power lines are connected by ^j, (not shown). 11. Fehlstronrelais according to one or more of the claims 1-8, thereby geke η η z ^: ei -c- h η et, 'that there is a ^: special generator (-31) for generating "von \ 7wechselstroiri" Has. '' - '^;"'·■"·' - '"■■■ ■ ■ = ■ -" ■ · "'" 12. Pehlstron relay according to claim 11 ", thereby g e k e n._n.z e i e h η e t that the generator "C 31) is set up to deliver an alternating current with a frequency which is different from the frequency of the "Netzstrrones" passed through the relay. That the frequency of the generator as, for example nehrere times as high wie.die frequency "is the Reläxs guided Netzstrones." 13 · Pehlstronrelais according to claim 12, characterized in that the higher ¹ by 14. Fehistron relay according to one or more of the claims 11-13 »identified by the fact that the Generator is an Forner, which is fed with direct current. 15. Fehlstronrelais according to claim 14, characterized in that the Unforner of a 0 ^ 2 DC network is fed by the Fehistron relay is led. 16. Fehistron relay in whole or in part as shown or described for: Servodan A / S 90984 7/0423 Lee rs e