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AT223265B - Zeroing protection switch with neutral voltage release - Google Patents

Zeroing protection switch with neutral voltage release

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Publication number
AT223265B
AT223265B AT862360A AT862360A AT223265B AT 223265 B AT223265 B AT 223265B AT 862360 A AT862360 A AT 862360A AT 862360 A AT862360 A AT 862360A AT 223265 B AT223265 B AT 223265B
Authority
AT
Austria
Prior art keywords
zeroing
protection switch
neutral voltage
voltage release
voltage
Prior art date
Application number
AT862360A
Other languages
German (de)
Inventor
Gottfried Dr Biegelmeier
Original Assignee
Biegelmeier Gottfried
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 Biegelmeier Gottfried filed Critical Biegelmeier Gottfried
Priority to AT862360A priority Critical patent/AT223265B/en
Application granted granted Critical
Publication of AT223265B publication Critical patent/AT223265B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Nullungsschutzschalter mit Nulleiterspannungsauslöser 
Das Stammpatent Nr. 216611 betrifft einen Nullungsschutzschalter mit Nulleiterspannungsauslöser, bei dem unter anderem die Überwachung der Nulleiterspannung dadurch bewirkt wird, dass nach dem Summenstromwandler über einen Vorwiderstand eine Verbindung zu einem geeigneten Hilfserder besteht. Dieser Vorwiderstand kann als Wechselstromwiderstand reell oder komplex sein. Seine Aufgabe besteht darin, den Strom so zu begrenzen, dass eine Auslösung des Schalters erst auftritt, wenn die Nulleiterspannung unzulässig hohe Werte erreicht. Nun kann aber der Hilfserderwiderstand schwanken,   u. zw.   zwischen sehr kleinen Werten, z. B. wenn als Hilfserder ein Wasserleitungsnetz benutzt wird, und dem für den betreffenden Schalter zulässigen Maximalwert, z. B. einigen hundert Ohm.

   Der Spannungsabfall des Vorwiderstandes setzt sich mit dem Spannungsabfall des Hilfserders, der immer rein ohmisch ist, zur Nullleiterspannung gegen Erde geometrisch zusammen. Bildet man den Vorwiderstand ebenfalls rein ohmisch aus, dann addieren sich die beiden Spannungsabfälle algebraisch,   d. h.   Änderungen des Hilfserderwiderstandes wirken sich stark auf die Auslösespannung des Nulleiterspannungsauslösers aus. Enthält der Vorwiderstand dagegen eine überwiegend kapazitive Komponente (Kondensator) oder eine tiberwiegend induktive Komponente (Drossel), dann addieren sich die beiden Spannungsabfälle praktisch rechtwinkelig,   d. h.   Änderungen des Hilfserderwiderstandes wirken sich auf die Auslösespannung nicht so stark aus. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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  Zeroing protection switch with neutral voltage release
The parent patent No. 216611 relates to a zeroing protection switch with neutral voltage release, in which, among other things, the monitoring of the neutral voltage is effected by a connection to a suitable auxiliary earth electrode via a series resistor after the summation current transformer. This series resistor can be real or complex as an alternating current resistor. Its task is to limit the current so that the switch does not trip until the neutral voltage reaches impermissibly high values. But now the auxiliary earth electrode resistance can fluctuate, u. between very small values, e.g. B. if a water pipe network is used as an auxiliary earth electrode, and the maximum value allowed for the switch in question, e.g. B. a few hundred ohms.

   The voltage drop of the series resistor is combined geometrically with the voltage drop of the auxiliary earth electrode, which is always purely ohmic, to the neutral conductor voltage to earth. If the series resistor is also made purely ohmic, then the two voltage drops add up algebraically, i.e. H. Changes in the auxiliary earth resistance have a strong effect on the tripping voltage of the neutral voltage release. If, on the other hand, the series resistor contains a predominantly capacitive component (capacitor) or a predominantly inductive component (choke), then the two voltage drops add up practically at right angles, i.e. H. Changes in the auxiliary earth resistance do not have such a strong effect on the tripping voltage.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENTANSPRUCH : Nullungsschutzschalter mit Nulleiterspannungsauslöser nach Patent Nr. 216611, dadurch gekennzeichnet, dass der Vorwiderstand eine Überwiegend kapazitive oder induktive Komponente enthält. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Zeroing protection switch with neutral voltage release according to patent no. 216611, characterized in that the series resistor contains a predominantly capacitive or inductive component. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT862360A 1960-11-21 1960-11-21 Zeroing protection switch with neutral voltage release AT223265B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT862360A AT223265B (en) 1960-11-21 1960-11-21 Zeroing protection switch with neutral voltage release

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT216611D
AT862360A AT223265B (en) 1960-11-21 1960-11-21 Zeroing protection switch with neutral voltage release

Publications (1)

Publication Number Publication Date
AT223265B true AT223265B (en) 1962-09-10

Family

ID=25604907

Family Applications (1)

Application Number Title Priority Date Filing Date
AT862360A AT223265B (en) 1960-11-21 1960-11-21 Zeroing protection switch with neutral voltage release

Country Status (1)

Country Link
AT (1) AT223265B (en)

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