DE1878456U - PROTECTIVE DEVICE FOR ELECTRICAL APPARATUS FILLED WITH INSULATING LIQUID. - Google Patents

Description

^ -410 190 * 28. 8, B? Erlangen »the 25.6 * 1963 j

61/1490 SM

SIEMENS,

SIEMENS-SCHUCKERTWERKE pa 61/1490 SM

File S 38 542 / 21d Sa

SHARED COMPANY

Schutssvorrlehtung for old insulating liquid filled electrical apparatus «

The hiring relates to a protective device for with insulating liquid filled electrical apparatus »e.g. oil transformer» in which it is installed in the bifurcation between the transformer tank and the oil conservator »Such protective devices serve to both the gas formation »and the oil flow and Monitor oil leakage * This is usually done with floats and / or baffle flaps, mostly a float on gas formation responds and triggers a warning signal »while on. other swimmer responds to oil loss and a damper to oil flow and Signa '* lleiert or that (Jerät switches off * So far you have on the swimmers uad storage flaps of such protective devices attached mercury interrupter tubes »which when swiveling the float or, storage flaps, i.e. in the event of malfunctions, e.g. short circuits or on If flashovers occur in the apparatus or oil loss in the apparatus boiler, actuate a signal or control circuit «Such protective devices generally work quite satisfactorily as long as they are not exposed to major vibrations, e.g. during earthquakes and the like · Up to shocks occurring in the event of vibrations, in particular the The more obvious horizontal vibrations bring the mercury in the interrupters sum overflow »so that these false trips cause * It has already been suggested * to give a signal other catfish »as.B. with the help of a Mirror deflected light beam and a photocell * The main factor here was "that no permanent, reliable display was possible" because the! light beam in the event of deterioration, especially Turbidity of the oil no longer pass through the oil with sufficient intensity.

PA 2/11/90 a (Amlsbogen) 3000 5.59 1181

eetste and also the mirror also slightly "tended to get dirty"

In addition to the control, a protective device 212 is to be created, avoids all of the aforementioned »eighth iles and practical remains fully effective for an unlimited period of time and especially without it great effort in terms of material and space is available »

The sewer is achieved according to the hiring »that the signaling takes place contactless with the help of sound on the floats and / or baffle flaps» building magnets serving as transmitters and a fixed Hallspanmingser that works with an »amplifier The Hall-tensionerjBeuger is practical, the door is indefinitely durable, even in hot oil, and, as both files are known to be very small, very little space is required to store them. As a result of the low weight of the small permanent magnet, the floats and storage flaps are not burdened by any additional weight and therefore in no way impaired in their operation. Torteilhaft is still further that unlike <ke previously customary mercury interrupters on the floats not even electric cables must be connected. " which could also impair the swimmer's movement and that the electrical lines leading to the hall generator can now be laid permanently The most important advantage, however, is "that the protection device according to the innovation works without contact and is absolutely vibration-proof * because, as the tests carried out have shown, the achievable fatigue strength is several times higher than with the previous protective devices that work with mercury tubes" ·

The protection device according to the innovation is still insofar. volume Gate shares as no time-consuming adjustment sound magnet and hall generator is necessary during their manufacture »but that they also with large tolerances yet, works with absolute precision, whereby it works entirely It is irrelevant * whether the swimmer's movement is fast or very slow takes place «This means« that the production is cheaper and the Operational safety is guaranteed in all cases Protective device can be operated with direct voltage without further ado »as required for monitoring devices * This is above all in relation to protective devices »those with coils work and take advantage of the change in inductance »of importance}, because these devices also require a chopper if "you want to work on" it direct voltage "

On the basis of the drawing «which is in a greatly simplified schematic Sectional representation shows an embodiment, the innovation is intended to be explained in more detail

The housing containing the protective device is denoted by 1, which is installed by means of the flanges 2 and 3 in the pipeline connecting the transformer housing to the oil expansion vessel Gas formation responds and? is a float that responds to oil loss and is rotatably mounted with its pivot lever 3 at 9 »where the flap 10 is also appropriately rotatably mounted» which responds to the flow of oil which comes into contact with "pivoting & bt stowage flapjauf the lever β * and thus pushes it downward" 12 is a small permanent magnet that is attached to the side of the pivoting lever 5 of the float by means of a suitable mount and 13 and 130 are by means of a suitable holder (not Hall voltage generator firmly attached to housing 1. These influence over

Claims (1)

the lines 14 connected to them a not shown "a signal or disconnection circuit activating Beiais" which itself can be housed at any point outside the housing ", for example in the control room * and" was via a trigger amplifier "" .B · transistor amplifier "Simatic and the like, which in turn influences a relay which actuates a control circuit. 15 is a farmer's magnet attached to the lever 8 of the float 7, which works together with the fixed Hall voltage generator 130 when the float 7 is pivoted f. 1 protection claim 1 figure 3 protection requirement ι Protective device for electrical with insulating liquid Devices, κ.B. oil transformers, consisting of gas formation, ? lÜ88iglteitaströBung and / or Plüsaigkeits loss appealing Controls, such as float and flap arrangements, the Operate signal * or control circuits, characterized in that that the signaling is contactless with the help of on the floats and / permanent magnets that are attached to or flaps and serve as transmitters and a fixed Halla-stimulation generator that works together with a bit of an amplifier * - 4th