DE2143045C3 - Device for recognizing disturbance phenomena in an oil transformer - Google Patents

Description

consisting of a cylinder (13) with an O inlet valve! (11). an oil outlet opening (121.

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formator (Tr), through a second shut-off valve (K) between the oil outlet opening (12) and an oil inlet opening on this transformer (Tr) and through a third shut-off valve (K ₁ ) / wiper. Gas outlet opening (15) and the CasanaKsator (GC). wherein during the reciprocating movement of the piston valve arrangement (14) there are essentially three positions of the shut-off valves in relation to one another, a first in which the first and second ₁ . F,) open and the third cradle "de fault m
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to prevent (NgI. "The J °" ™ ^a ^, _No 887. * ₅ Electric Engineers of apan ". Vol.

Aug. 62, pp. 13-7 to .13 « . reported

_Λ ^Α . ^ SrRF Renorf WGT-Ol C »Earlv Detecworden < ^C ^ E-Rcport WCUHC _f - _{fe% Gas} .

non of inupient failures in ran. _mmen .

J _{Analvse firmly} . f Disturbance phenomena

; _{in large} measure of the transformer

_{of the} transformer ° e _f

Gas to the gas analyzer _v ^. ^, __.

Check valve (F ₁ ) is open. while the first and second shut-off valves (F ₁ , F ₂ ) are closed.

2. Apparatus according to claim 1, characterized in that during a continuous movement of the piston valve arrangement (14) the opening and closing of the three check valves (F _1. F. "F _;) ) by an automatic device

is controllable.

3. Apparatus according to claim 1 or 2, characterized in that the piston valve arrangement (14) consists of a larger diameter part (142) which is in liquid-tight contact with the interior of the cylinder (13), and a smaller diameter part (141 ), which forms a lower space (B) with the inside of the cylinder (13), the larger part (142 ) being penetrated by at least one narrow opening (143). that connects the lower space (ß) with the upper cylinder space.

4. Apparatus according to claim 1 or 2, characterized in that the piston valve arrangement (14) replaced by a bellows arrangement

5. Device according to one of claims 1 to 4, characterized in that a filter arrangement is provided for retaining oil components between the cylinder arrangement (5D) and gas analyzer (GC).

The invention relates to a device for recognizing disturbances in an oil transformer disturbance allowed in the transformer.

Coil windings, insulation, etc.). For a binding statement, a whole series of components must be determined according to their relative frequency, such as H. "O." N. "CH ₄ . CO. CO ,, C ₂ H _1. , C ₁ H ₄ . C ₁ H ₁₀ C ₃ H ₈ , C, H, etc.

For the examination of such a transformer oil from, the sample had to be removed from the transformer housing, filled in a sample container and be brought into tn laboratory for testing. This method is very disadvantageous because strictMens must ensure that the oil comes into contact with the air as little as possible so that the gas components of the air do not mix with the oil of the transformer. This precaution requires considerable time, effort, and special containers. In addition, the loss of time that occurs is a great disadvantage if tendencies towards a change in the gas components in the oil are to be determined within a short period of time. Furthermore, the instantaneous temperature of the oil also plays a role, so that it cannot maintain its original value with the known method and is therefore incorrectly included in the analysis result of the gas. Last but not least, it is uneconomical to lose the removed or degassed oil with each sample.

Various devices have already become known that are used to purify the oil an oil transformer can be brought into direct connection with a transformer housing. However, in one case (US Pat. No. 1,544,296), the oil is removed from a transformer

3 4

taking advantage of the expansion and the joint housing of the oil transformer can be seen, and drawing of the oil is discharged in a line and that no oil is lost in the system. AuiJerin this is fed back to the transformer. This is achieved by the constant Kniben-Oil runs through a filter device in which it moves the oil in the transformer before the actual movement. is cleaned. In such a system, however, 5 borrowed samples are sufficiently circulated, the oil is not circulated sufficiently so that it is not ensured that there is a disturbance phenomenon is guaranteed. that in the escaping oil the oil occurring foreign constituents always in the same way with the constituents of gas that are mixed under the oil. As a particularly advantageous in the case of a distant point of interference, it can be seen that the whole of the invention have formed. In another case (Austrian device essentially consisting of a single. De-ί see patent specification 108 438) is a complex specially designed cylinder / piston arrangement '' The system consists of a series of pumps, a heater, into which three lines provided with shut-off valves ; a centrifuge, etc. described, in which mouth by means of tungcn at appropriately selected points ^ a constant negative pressure at different Thus the construction of the device is simple and £ Establishing an oil pipe system to remove moisture from 15 is not very expensive.

I want to separate the oil. Disadvantage of this The analysis result of the gas from the O can

Is ■■ system that be to read directly at the location next to a large effort at which the

deposited substances are lost. Is placed in a transformer, and thus can

I further publication (German interpretation pamphlet also necessary according to the gas analysis result

I 1 121 720) describes a device in which maneuverable countermeasures are taken in order to

which cleans a transformer oil under negative pressure to negate further malfunctions without delay.

should be, the negative pressure by a pump dem. . .

ι; and the oil from an expansion vessel. Last but not least, the device can also be used as a Rcini-

If another pump is needed, the fringing system for the transformer oil can be viewed again.

Ss formator is pumped. A cylinder acts here because it acts as a

i piston assembly as a passive control valve gas present in the oil harmful components

I arrangement. Such a device can, however, separate this and the "cleaned" oil

I also re-supplies for the oil extraction and for a processing transformer.

I do: ü the oil is not used for a gas analysis. ₃ o can shut off valves through an automatic

I Is is therefore the object of the invention to be controlled for the F.rken device so that an integral

It is formed by disturbance phenomena or by abnormal supply systems. where it is imaginable. that if there were a device in an oil transformer, also based on the analysis result Vorkenin simple construction that automatically regulates the transmissions in the transformer Formator oil without temperature loss in one after 35.

^: - The system is closed from the outside, the transform- In the drawing is an embodiment of the

rnatoi takes that for the disturbance phenomena, for example, shown the invention, namely shows

ι separating gas from oil and the deposited one / ige figure a schematic representation of a

dene gas a gas analyzer and the oil again device according to the invention, in which the cylinder

I _I supplies the transformer. 40 of the arrangement is shown in longitudinal cross-section.

According to the invention, the object is achieved by an oil transformer Tr with a device, which is characterized by an oil circuit shown in the drawing. In the Ölumiaufkreis cylinder arrangement, consisting of a cylinder, the oil runs from an outlet opening on the Trans-1 with an oil inlet opening, an oil outlet opening, formator through a first shut-off valve K ₁ , then through ^; a gas outlet opening and one with the cylinder 45 a cylinder arrangement SD, through a second blocking 'cooperating piston valve arrangement,' through valve K, and finally through an inlet: a gas analyzer known per se, through one on the transformer back into the interior des ' ^rans "- first shut-off valve between the oil inlet opening and a formator Tr. The cylinder arrangement SD consists of an oil outlet opening on the transformer to be tested - a cylinder 13 and a Κ ⁰ · ^^ ™ ^{1. 1} '*"" Γ gate through a second shut-off valve between the oil outlet 50 order 14, the cylinder 13 having an oil inlet opening and an oil inlet opening on this opening 11 and an oil outlet opening IZ on its i ^j transformer and through a third The piston valve ^{arrangement 1} between the gas outlet opening and the gas analyzer is slidably arranged in the interior of the cylinder 13, whereby a gas outlet opening 15 during the to-and-fro movement In the middle of the piston valve arrangement there are essentially three parts of the cylinder 13, these lungs being provided in relation to one another, a first one at gas outlet opening 15 being designed in such a way as to circulate the oil the transformer in the transformer contained gas through a uasin the cylinder arrangement and back the first and shut-off valve K ₃ a gas analyzer GC known second shut-off valve is opened and the third shut-off valve type is fed. The piston valve arrangement 'are closed, a second, in which 60 has a piston part 1.41 and a valve element of a negative pressure and thus for separating the 142, the piston part 141 the lower main gas from the oil all three shut-off valves closed all three shut-off valves part of the piston valve assembly 14 represents and are and a third, in which for the output of a smaller diameter, while the separated gas to the gas analyzer only the valve element 142 has a larger diameter opened shut-off valve, while the first and 65 is seated, which is essentially the same inner Se shut-off valve are closed. Diameter of the cylinder 13 is a Abdichtmog-With the invention it is achieved that the oil to the likelihood between the cylinder 13 and the valve-V analysis directly and in the shortest possible time from the element 142 and between the cylinder 13 and

the piston part 141 is ensured by the O-rings 16 and 17, the O-ring 16 on the outer Edge of the valve element 142 and the O-ring 17 in an opening at the bottom of the cylinder 13 are provided. The piston valve assembly 14 has a few relatively narrow openings 143 which connect the upper part of the piston part 141 with the surface of the valve element 142 connect.

The mode of operation and the procedure for an analysis of the gas which has dissolved in the oil contained in the transformer Tr is explained below in connection with the device described above.

First, the gas shut-off valve K _{1 is} closed and the shut-off valves K ₁ and V _{2 are} opened and the piston valve arrangement 14 is moved to and fro in the axial direction by a piston drive (not shown), as indicated by the arrows. As a result, oil is drawn into the cylinder 13 from the transformer Tr through the check valve F ₁ and the oil inlet port 11 while the piston valve assembly 14 is moving downward; the oil is then sent back into the transformer through the oil outlet opening 12 and the check valve V., when the piston valve assembly 14 is moved up to a position P , which is shown by the dashed line. By repeating the reciprocating movement of the piston valve arrangement 14, the oil in the transformer Tr can therefore circulate via a closed oil circulation path, namely: transformer Tr, cylinder arrangement SD. Shut-off valve V _2, transformer Tr. Even when oil has been used for the previous test, still remains in the device SD prior to their activity, this oil can be replaced with the oil from the transformer Tr. When the arrangement SD is thus completely and newly filled with oil. the piston valve arrangement remains once in a certain position, for example in the position P shown with the dashed line, so that a certain amount of oil remains inside the arrangement SD; then the shut-off valves V ₁ and V _{2 are} closed. If the piston valve assembly 14 now moves downward from the position P under the condition that all shut-off valves are kept in the closed state, a vacuum part is formed over the oil surface on the piston valve assembly 14 inside the cylinder 13. At the same time, the pressure in the chamber B , which is formed by the piston part 141 of the piston valve assembly 14 in the interior of the cylinder 13, increases, whereupon the oil in the chamber B is pressed through the openings 143 onto the upper surface of the piston valve assembly 14, and at the same time the gas contained in the oil is released into the vacuum part. When the piston valve assembly 14 has reached a predetermined, lower limit position during this degassing process, the shut-off valve K _{3 is} opened and the piston valve assembly 14 is moved to position I ' , whereby the extracted gas is fed to the gas analyzer GC and part of the The oil lying on the piston runs through the narrow openings 143 into the chamber B. If the piston valve assembly is then pulled down again, gas is again released from the oil to the outside, in accordance with the method of operation described above. This piston work is repeated correspondingly often in order to supply the extracted gas to the gas analyzer GC , in which the gas is then analyzed according to a known method, displayed in a measuring device, registered in a recording device or suitably processed as required. The oil test and degassing can be carried out without the openings 143 in the piston valve arrangement 14, but the presence of these openings 143 undoubtedly improves the degassing process, especially since they cause the movement and the escape effect of the oil.

The gas analyzer GC can be used as a unit with the cylinder arrangement SD. the drive mechanism and the check valves, or it can be provided separately as shown in the drawing. so that pipe connections lead to this to meet every use. A replaceable filter made of silica gel can preferably be used in series with the shut-off valve 1Λ in order to cut off or separate off oil components which are still contained in the gas and have been separated from the oil.

The piston valve arrangement 14 of the arrangement SD can also be a bellows. This could simplify the sealing precautions.

The arrangements according to the invention can be set up in one unit, whereby the The possibility arises of forming this unit together with the transformer. Besides, it is possible if the cylinder arrangement and the shut-off valves with a motor or electromagnetic work automatically a series of operations between oil sample and gas analyzer in one short Period of time to carry out, by a mere push of a button on the arrangement.

1 sheet of drawings

Claims (1)

Paicnlansorflchc ·
Claims secluded , .Device to detect.non-interference - if in a genes occur in an oil transformer by deposition 5, as be m: wmmw mator by separating the gas dissolved in the oil of the formator and analyzing the separated gas according to ^ ^ne " ^B 5 ^stM * ^lei l *" If in a «J ^