DE745540C - Testing and protection device for monitoring the insulation resistance of electrical machines and apparatus - Google Patents
Testing and protection device for monitoring the insulation resistance of electrical machines and apparatusInfo
- Publication number
- DE745540C DE745540C DES131786D DES0131786D DE745540C DE 745540 C DE745540 C DE 745540C DE S131786 D DES131786 D DE S131786D DE S0131786 D DES0131786 D DE S0131786D DE 745540 C DE745540 C DE 745540C
- Authority
- DE
- Germany
- Prior art keywords
- monitoring
- insulation resistance
- test
- testing
- protection device
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
Prüf und Schutzeinrichtung zur Überwachung des Isolationswiderstandes elektrischer Maschinen und Apparate Bei in Bergwerken, in Schiffen oder anderen feuchten Betrieben untergebrachten Maschinen schlägt sich oft Wasser im Maschineninneren nieder, das die Güte der Isolation beeinträchtigt. Es ist bekannt, als Maßstab für die Güte der Isolation den Isolationswiderstand zwischen der Wicklung und dem Eisen mit Hilfe eines Prüfleiters zu messen bzw. zu überwachen.Test and protection device for monitoring the insulation resistance electrical machines and apparatus in mines, ships or others Machines housed in damp plants are often hit by water inside the machine down, which affects the quality of the insulation. It is known as a benchmark for the quality of the insulation the insulation resistance between the winding and the iron to measure or monitor with the help of a test director.
Die Erfindung geht von der Erkenntnis aus, daß diese Art der Messung oder Überwachung kein klares Bild ergibt und daß auch bei verhältnismäßig hohem Widerstand zwischen Wicklung und Eisen Isolationsstörungen aufgetreten sind.The invention is based on the knowledge that this type of measurement or surveillance does not give a clear picture and that even at a relatively high Resistance between winding and iron Insulation faults have occurred.
Erfindungsgemäß ist der Prüfleiter zwischen die isolierten Leiter der Wicklung innerhalb der Isolation gegen Körper eingebracht und die Prüf- oder Meßeinrichtung zwischen Prüfleiter und Wicklung eingeschaltet.According to the invention, the test conductor is between the insulated conductors the winding introduced within the insulation against the body and the test or Measuring device switched on between test conductor and winding.
Die Überwachungsvorrichtung kann, wenn der Isolationswiderstand unter eine bestimmte Grenze absinkt, ein Signal geben, die Maschine selbsttätig abschalten oder Vorrichtungen zur Trocknung der Maschine in Betrieb setzen. Der Sicherhmit halber kann mit dieser Überwachungseinrichtung auch eine Einrichtung verbunden werden, die- in bekannter Weise den Isolationswiderstand ; .zwischen Wicklung und Eisen prüft. Die für die Prüfung und Überwachung erforderlichen Schaltungen sind an sich bekannt; so könnten z. B. Widerstandsbrücken verwendet werden, in deren einem Zweig der Isolationswiderstand liegt, Kompensationsschaltungen, Kondensatoranordnungen, Schwingungskreise mit meßbärer- Dämpfung usw. Der Leiter kann in verschiedener Weise in die Wicklung ein-@ebracht werden. Man kann z. B. bei jedem Wicklungsdraht noch einen dünnen Prüfdraht mitlaufen lassen oder kann den Wicklungsdraht an irgendeiner Stelle mit einem leitenden Belag versehen. Statt dessen können jeweils nach Einbringung mehrerer Drahtwindungen oder -lagen Prüfdrähte oder leitende Beläge zwischengelegt werden. Unter Umständen kann als Meß- oder Prüfleiter auch ein toter Teil, also ein außerhalb des Stromkreises liegender Teil der Wicklung, verwendet werden. Damit in dem Prüf- und Überwachungsleiter keine störenden Spannungen induziert «-erden. wird der Leiter mit blinden finden verlet oder an mchreren Stellen unterbrochen. Man kann auch clen Leiter so verlegen, daß das Spannungsintegral über seine Länge Null ist, oder man kann den Prüfleiter bifilar verwickeln.The monitoring device can when the insulation resistance is below drops a certain limit, give a signal, switch off the machine automatically or start up devices for drying the machine. The security with For the sake of this, a device can also be connected to this monitoring device, the - in a known way the insulation resistance; .between winding and iron checks. The circuits required for testing and monitoring are in themselves known; so could z. B. Resistance bridges are used in one branch the insulation resistance is on, compensation circuits, capacitor arrangements, Oscillation circles with meßbär damping, etc. The conductor can be inserted into the winding in various ways be brought in. You can z. B. a thin test wire for each winding wire run along or can connect the winding wire at any point with a conductive Covering provided. Instead, after several wire windings have been introduced or layers of test wires or conductive coatings are placed between them. In certain circumstances can also be a dead part as a measuring or test conductor, i.e. one outside the circuit lying part of the winding. So in the test and monitoring manager no disturbing voltages induced «- earth. will find the leader with the blind lost or interrupted in several places. One can also move the ladder in such a way that the voltage integral over its length is zero, or you can use the test conductor entangle bifilar.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES131786D DE745540C (en) | 1938-04-22 | 1938-04-22 | Testing and protection device for monitoring the insulation resistance of electrical machines and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES131786D DE745540C (en) | 1938-04-22 | 1938-04-22 | Testing and protection device for monitoring the insulation resistance of electrical machines and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE745540C true DE745540C (en) | 1944-03-13 |
Family
ID=7538857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES131786D Expired DE745540C (en) | 1938-04-22 | 1938-04-22 | Testing and protection device for monitoring the insulation resistance of electrical machines and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE745540C (en) |
-
1938
- 1938-04-22 DE DES131786D patent/DE745540C/en not_active Expired
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