COMEM BUCHHOLZ RELAY PDF

Bahn The relay 16 according to claim 1, buchhholz in that said movable flap device 33 comprises a tubular support 40 inside which a counterweight 41 can be inserted. For example, DE A discloses a Buchholz relay having all the features of the preamble of claim 1. Inside the relay 16 there is provided a frame, preferably made of plastics, in an upward region whereof holes buchhlz are defined for engaging the cover 20 by means of fixing screws which are not shown in the above figures for the sake of simplicity. Go to worldwide contacts. This aim, these objects and others which will become apparent hereinafter are achieved by a Buchholz relay which comprises, to be immersed in an oil bath, a supporting frame for magnetic switches for closing circuits which are operated by movable devices, of which at least one is of the floater type and at least one is of the flap type rotatably associated with said frame, characterized in that said flap device, which has a surface sensitive to the presence of oil currents, is independent of said floaters.

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Bahn The relay 16 according to claim 1, buchhholz in that said movable flap device 33 comprises a tubular support 40 inside which a counterweight 41 can be inserted. For example, DE A discloses a Buchholz relay having all the features of the preamble of claim 1. Inside the relay 16 there is provided a frame, preferably made of plastics, in an upward region whereof holes buchhlz are defined for engaging the cover 20 by means of fixing screws which are not shown in the above figures for the sake of simplicity.

Go to worldwide contacts. This aim, these objects and others which will become apparent hereinafter are achieved by a Buchholz relay which comprises, to be immersed in an oil bath, a supporting frame for magnetic switches for closing circuits which are operated by movable devices, of which at least one is of the floater type and at least one is of the flap type rotatably associated with said frame, characterized in that said flap device, which has a surface sensitive to the presence of oil currents, is independent of said floaters.

Another object of the present invention is to provide a Buchholz relay which. The flap is usually obtained monolithically with the lower floater, and when significant oil currents occur, the flap, by rotating about its own axis because it is directly affected by the flow, causes the intervention of the switch for closing the disconnection circuit. The relay 16 according to claim 1, characterised in that said movable flap device 33 is made of plastics.

Descrizion 2 3 Trip circuit Codice: In case the oil flow speed exceed the pre-set value, the the flow vent operates and switch the trip contact. The relay for OLTC application is positioned in the pipe work between the on-load tap-changer head and the oil conservator. When an oil current occurs whose flow-rate exceeds the limit set by the adjustment, the movable flap device 33 in fact rotates with respect to the frame 25 so as to directly actuate said disconnection circuit.

ANSI Z 1 PDF Unfortunately, the resulting flap is enormously impaired by the fact that it is monolithic with the lower floater; moreover, adjustment performed in the above-mentioned manner is inaccurate and sometimes difficult to provide in practice. The sides 39 are parallel and are kept together by a tubular support 40 which protrudes monolithically from them with an axis which is parallel to the pivot Please select country from the list below.

Messko has had long years of positive experience with this material using it for the MTO series oil level indicators. The aim of the present invention is to provide an improved Buchholz relay which solves the above drawbacks of conventional relays. In other cases, the flap is adjusted by moving it appropriately along suitable guides or by using fixing screws, so as to reduce the surface of the flap that is affected by the oil currents.

When installed at a user-friendly working height, the fault gases can be safely and reliably sampled from the Buchholz relay. Please fill in required fields. Relay — Comem The distribution of these gases can be related to the type of electrical fault, and the rate of gas generation can indicate the severity of the fault. The gas can in fact, in a first case, originate from outside and be introduced through the circulation pumps or, as an alternative, it can be the result of the decomposition of the liquid or solid insulators caused by overheating or by the onset of electric arcs.

The flow-rate limit is determined by the extent of the surface of the flat member 37, so that in order to achieve maximum sensitivity of intervention of the flap device 33 it is sufficient to use a flat member 37 which comprises all its detachable portions With reference to the above figures, an oil-filled transformer is generally designated by the reference numeral 10 and has a tank with radiating elements 11 to which an expansion vessel 12 of a per se known type is connected in an upward region.

An error occurred and your inquiry could not be sent. The flow relay detects a failing transformer. In particular, it is important to note that sides 39 uniformly distribute the effect of the presence of the counterweight 41 along the entire extension of the flat member Any infringement will be legally persecuted.

Guides 46 are formed on the posts 27 of frame 25 in a region located below the lower movable device 32 of the floater type. Remote testing possibility At any time the MSafe can be triggered via a compressed air line to test its readyness of operation. The relay is usually constituted by a body obtained from aluminum alloy castings, inside which a supporting frame is placed for at least one movable device which comprises an upper floater and a lower floater for operating magnetic switches.

In this manner, the combination of the first and second prefractures 43 and 44 forms, on the flat member 37, detachable portions 45 starting from the lower end When gas forms inside the transformer, said gas, which tends to escape upward, accumulates inside the relay, lowering the level of the oil; this lowering is detected first by the upper floater, which accordingly operates the alarm circuit, and if the accumulation of gas continues it is then detected by the lower floater, which is directly connected to the circuit for disconnecting the transformer from the power supply line.

A possible particular characteristic is that the contact of the disconnection circuit is kept closed whenever the flap rotates under the action of intense oil currents or because the level of the oil has dropped below a certain value.

Protected Reed switches The reed switches of the MSafe are separated by immersion pipes from the oil. Lightning impulse withstand voltage kV peak Between circuits and earth 2 5 Across open contacts 1 3 Operating pressure — 1 bar, tested to 2,5 bar for 2 minutes at deg C. The terminals of the reed switches are positioned in the terminal box and the perfect sealing is guaranteed by an Relsy gasket. Buchhols relay 16 is provided with a movable device of the flap type, designated by the reference numeral 33, which is constituted by a flat member 37 from one end of which a pivot 35 protrudes.

Currently it is indispensable to provide all oil-filled transformers with a Buchholz relay so that the generation of gas and the presence of significant oil currents are reported immediately.

At any time the MSafe can be triggered via a buchgolz air line to test its readyness of operation. Sticky label 90 X 52 with white background and black Trip circuit Trip circuit Codice: In practice, it has been observed that the present invention widely achieves the intended aim and all the objects. Additionally, all kind of transformers may be equipped with oil conservator air bag air cushion embedded into the oil conservator and it is fundamental to ensure its correct functioning: TOP Related Posts.

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Pinterest0 Continuous monitoring of two crucial parameters to ensure correct transformer performance Transformer outages have a considerable economic impact on the operation of a power supply network. Internal gas accumulation and oil flow are monitored and kept under control by the Buchholz relay. The Buchholz relay is sited in the pipework between the transformer and its conservator and it is filled with oil during normal transformer operation. Gas Accumulation When gas is generated in the transformer it rises towards the conservator and collects in the upper chamber of the relay. The oil level drops and the top float triggers alarm switch.

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This aim, these objects and others which will become apparent hereinafter are achieved by a Buchholz relay which comprises, to be immersed in an oil bath, a supporting frame for magnetic switches for closing circuits which are operated by movable devices, of which at least one is of the floater type and at least one is of the flap type rotatably associated with said frame, characterized in that said flap device, which has a surface sensitive to the presence of oil currents, is independent of said floaters. When an oil current occurs whose flow-rate exceeds the limit set by the adjustment, the movable flap device 33 in fact rotates with respect to the frame 25 so as to directly actuate said disconnection circuit. Alternatively, it is mounted on top of oil conservators and once there is a sudden air flow from air bag it trips the transformer. Sticky label 90 X 52 with white background and black writings. The relay is usually constituted by a body obtained from aluminum alloy castings, inside which a supporting frame is placed for at least one movable device which comprises an upper floater and a lower floater for operating magnetic switches. Go to worldwide contacts. In some cases it is convenient to appropriately tilt the transformer in order to ensure that the Buchholz relay assumes the buchyolz position on the transformer.

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COMEM BUCHHOLZ RELAY PDF

Relй de Buchholz - Wikipedia, la enciclopedia libre. Complete Catlog of Buchholz Relay. Buchholz Relay type eBR. The continuous gas monitoring of the gas inside the Buchholz relay The new COMEM Buchholz relay with analog and digital output Buchholz Relay is a protection device for monitoring the gas release of the floats to test the alarm circuits. En el campo de la distribuciуn y transmisiуn de la energнa elйctrica, el relй de Buchholz, tambiйn llamado relй a gas o relй de presiуn repentina, es un. Transformadores de potencia - edp hc energнa Relй Buchholz - Terman.

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