DE2035923C3 - Device for measuring very high currents - Google Patents

Description

Current in the conductor.
'30 In one of these known facilities for

Measurement of a current that is one on high

Voltage flows through the conductor, through

The invention relates to a device for measuring the Faraday effect with an optical solution of very high currents by means of polarized light the field to be measured material, in which the φ Hds current generated magnetic field is influenced, it is already known on a closed path around the conductor, a German electrical conductor holds isr. comprehensive core made of a magnetizable work-

In order to arrange the measurement of higher electrical currents in material that has a gap between two opposing lines with normal measuring devices, 40 overlying pole pieces, in which the Faraday element is converted in practical operation. Due to the amount of current through electromagnetic current transformers. This closed circuit around the current-carrying transformer - these are short-circuit transformers, the conductor is thus the entire magnetic voltage whose number of ampere-turns on the primary side is recorded by a revolution integral φ Hds. However, this device number of ampere turns on the secondary is not suitable for measuring very high currents on the opposite side, i.e. a high current on the 10OkA and above, as is the task of the upstream primary side due to the number of turns ratio. because an iron transforms to a lower core suitable for the measurement in the field area of a current carrying such high currents on the secondary side. In the case of completely unhigh currents to prevent saturation, single-conductor transformers 50 are preferably used that are economical and practically impracticable, ie the primary winding only has to have a winding (German interpretation document of one turn, e.g. in the form of a straight conductor, 1 257 275 ).

which is comprised of a magnetic core. The object of the invention is to provide the

which faces a corresponding number of secondary difficulties, those of the measurement of very high turns is located. 55 currents with conventional converters, especially

Also used for measuring direct currents on the transformer or transductor principle, one preferably opposes a similar structure to meet,
however, using the transductive windings with very high numbers of turns

Principle in which, taking advantage of the saturation, accordingly sensitive and susceptible, so that the kink of the magnetic mate- 60 reliability is in question. In such The dissipation of the heat loss is very important to compensate for the windings from the direct current secondary counterflow- difficult, if not impossible. The Vertung taken from an auxiliary alternating current network, turning of magnetic material for the iron is, being a measured variable for the height of the equal kernels is very problematic because of the high the flowing alternating current is used directly. 65 field strengths, the iron saturation has an upper limit The primary currents to be measured are now reached. In particular, such converters are very useful high ranges, 100 kA and against field asymmetries and external fields, over, so will. the effort for the on the secondary Since it is with the power plants in question

ji. «Τ it Η, τ plane of polarization corresponds to a twisting effect the ro.a ^. ^

accordingly the Windungszam ve _ _{ndc with the measurement} from the frame «i_ ^. ^ ^. ^ _{cincs gc} signal modulated license _{un of the} angle of rotation

suitable detector for, "^ _n This can der Polansationse ° j-" V _ion ^B _sfiUe r _m i _t nachgeschalz.B. from a ro. ^^ _the p _otozc n _c

teter photocell i ^ sicnu .. ^^ ^ ^. ^ _Mcß recorded signal ^N _{for the} measurement

"> the iu strengthens value enhancers

required ^LelS p ^. ^ "teii is, however, replaced by a larger uei. _erre j _c hbar wherein ^ second after

Where almost exclusively electrolysis or furnace systems are concerned, the current return conductor is in the immediate vicinity Near the outward conductor, so that the frcmdfelder stemming from it on the built-in Inevitably act converter. The disadvantages of the magnetic core and winding are now completely avoided if the Messune by means of polarized light and one the Faraday effect

having material located in the magnetic field takes place.

Since so far the known proposals for the use of this measurement method exclusively the Measuring currents at high potential, the question of influence arose J Güd dernnihts foreign fields

high voltage enough sample spacing _bcnc g

ter to conductor had to be adhered to. Thus, the P ^{urs run} § ^{llc "c} _{Indikalor sor} gt case for this, it was enough with the known embodiments, a is A geeigne he ₀ |. _R j _a ^l i _{sat O} nsebene and the relatively small piece of the Faraday EfEekt up that the ^u ^ P ^run ° "| -" _{material showing the orhan} dene polarization plane at a defined distance to the 20 after the ^Uurcmd ". _ih · _r the so that then the

Rine great
Compensation contract

the exiting Licm * ι.

If there is a high potential for compensation ^ ^^ the question of the entry of the exiting license arises. _having a body, not. Yes, for the sake of the 15 following the t-arauav. _ick | _is laid down, in the sample distances from the laces a compe. _{bcnc ZU} had to be turned back so the ^urs P ^run § ^llc " ^c t here for it

^ | ,, _orhan dene Po

according to the ^Uurcmd ". _calibrate ., _{r den, so that then the current} of the light Qf *""^ * nnsationS c _ro m is a proportional signal which is to be measured directly per expended ^ ^om P ^cn _

represents. _Can keep the installation effort small.

Around the Ko ^m P ^e " _after- switched body

can he ! ^L ' ^c ™ * ^e f "? ° _en b ^ _{n £ nd} _

by Mehrfachreflewom.n a

^ "^ HH ^ figures described below On hand aer na h uh

pointing material to be arranged at a defined distance from the conductor in order to achieve a current proportional To get measurement signal. Each external feed would, however, falsify the measurement signal and the accuracy wedge affect.

A complete elimination of the influence of external fields, especially of the return conductor Electrolysis and furnace systems, as well as the avoidance

The formation of saturation symptoms is described below

magnetic material takes place at a facility on hand aer na measuring principle even closer

for measuring very high currents by means of polarized 30, the direction c should include _a rectangular one

Light and one exhibiting the Faraday effect are explained, irig- _au f _we isendem Maim in the magnetic field in which the frame from the rara _lead the conductor 2,

-φ Hds Tenal on a closed path around the conductor 1 the einenj £ ^he J _{laufint RAI f} Hds of

is detected, according to the invention in that the so that «n entire _frame ^. ^

connected path from the Faraday effect up 35 the ^Rah ™ ^e _"F S cinwschliffene ^and mirrored

pointing material itself is embodied. at ^{the four} "^" _Re flexionsflächen, so that a

If now, according to the invention, the Faraday under 45 | ^e ^ ' ^gie _perfect run on the

Effect-exhibiting material on a closed beam

Way arranged around the current-carrying conductor, so way S I / ^

is on this exactly the enclosed primary -0 to the

flow rate β = / Hds detected, since for the rotation *>

the plane of polarization of one traverses this path

fenden light beam the relation _Λ = -C f Hds

applies, where C is a material constant (Verdet-Kon-) i Eid Fdfelder and Unsymme

which the

after

is> ⁿ ^ ίΐζΐ d- frame one under is mirrored on

Hn to. Bahmei enters and

tjMn α , _{η Ί} _

^ Frame this mirror surface ill d

fenden ^ fS ^ frame di pg

applies, where C is a material constant (Verdet-Kon- is> ^{n since} f " ^a " ^s ^ of _the light beam in principle shown). Stray foreign fields and asymmetrical 45 and the course of the L ch V of _{the Com} .

the Anordnun geometries _g here remain without egl.che ^ J ^^^^ r ^ which the impact of a. .
The actual training of such a one
d Gä id from practical

50

The actual formation of a circulation measuring device becomes practical Reasons have the shape of a frame.

A square shape can be chosen as a practical implementation of such a frame the corners with less than 45 "inclined reflection surfaces are provided. These are appropriately sanded and mirrored on the outside.

However, one can assemble the frame and m abwe, -Chung of the square shape of curved in such kind parts that within the framework of cross-section total reflection on tritt.und an inserted light beam the full circuit betae of the effect it may expedient ^ g ^ J ^^ ^^ r ^ the

WL ·, p _f f _P kt exhibiting body and one in Faraday effect autw «cn f _olarisat in _O nsebenc

J ^ " _r ^ _he ^ZU ^ 3Se field generating we required mag re-measured current,

The effect consists in MeBg ^ g ^ _{j verdrehtcn}

f ^r ^^^ uchtes in the original

P ° ^lansatl " _r " ^set £ ^ ° _{jst a directly} proportional position crford «hch is« te _

55 ^meas 8 ^r ° j5. ^tur _d " _{m known} transductive gb d ^ m D _{bd wdchcm dic}

^ _Z and measured power "only under Stro ™ _s accessories gijung fixed

^ eW.chern Autw an _invention acc. to McB-

^ ^ J ^ '3 _the direction of flow of the to me.e nder, Pn ^ romes .. ^ Ber ^ la ^ ch

SSÄ record high direct current components.

1 sheet of drawings

Claims (5)

A-ropes to be applied turns extraordinary patent claims: high, in addition, the current heating in the secondary windings and the influence of field 1. Device for measuring very high currents, increasing asymmetries and external fields by means of polarized light and one of the Fara 5 difficulties. day effect exhibiting in the magnetic field It is now known to measure current lichen material, in which the / Hds on men at high potentials, which is extraordinary a closed path around the conductor covers complex and expensive insulation measures is, characterized in that the require so-called magneto-optical converters too closed way of which use the Faraday effect io, in which the potential difference of having material itself is embodied. High voltage on earth due to radiation over- 2. Device according to claim 1, thereby bridging; d. H. a current is marked on high voltage, that the beam jngssignal which is proportional to the Faraday effect and which is on earth Pointing material takes the form of a square potential from a corresponding receiver Has frame, which is received in the corners with 45 15. One of these well-known solutions has inclined reflective surfaces. is in the magnetic field of the on high voltage 3. A device according to claim 2, characterized in that the lying conductor indicates the Faraday effect, that the reflective surfaces are to be fitted with material, i.e. a substance that polished ur.ii are mirrored on the outside. is translucent, but under the influence 4. Device according to claim 1, characterized in that a magnetic field indicates the plane of polarization of the, that the frame twists from light so urgent. The solutions are composed of curved parts that are now in the magnetic field of the high voltage Total reflection occurs. to attach such a material lying conductor. 5. Device according to one of claims 1 him from the earth potential with a polarized light bis 4, characterized in that the light beam to illuminate 25 and this after mirroring shine! several times around the conductor to resume ground potential. The one in the magelines is. Material twisting of the plane of polarization now represents a proportional measure of the size of the