• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a desiccator (1) for an electric apparatus immersed in an insulating liquid comprising: at least one tank (2) comprising: an inlet (3) of air; an absorbent agent capable of absorbing moisture from the air, the absorbing agent comprising a colored indicator capable of changing the color of the absorbent agent according to its moisture content and a dehumidified air outlet, characterized in the desiccator (1) comprises: at least one colorimetric sensor (7) capable of determining the color of the absorbing agent; a management module (8) connected to each colorimetric sensor and configured to be able to process the data acquired by each colorimetric sensor (7).
    公开号:FR3042306A1
    申请号:FR1559588
    申请日:2015-10-08
    公开日:2017-04-14
    发明作者:Andre-Philippe Chamaret
    申请人:SNCF Mobilites；
    IPC主号:
    专利说明:

    The present invention relates to a desiccator for electrical apparatus immersed in an insulating liquid. In particular, the invention relates to a desiccator for a transformer immersed in an insulating liquid, in particular for a railway vehicle transformer. 2. Technological background
    High voltage electrical equipment, such as transformers, is usually immersed in an insulating liquid.
    A so-called submerged transformer transformer is thus constituted of one or more tanks comprising active parts. The active parts consist of coils made of materials having electrical conduction properties and mounted on a magnetic circuit. The active parts are immersed in an insulating liquid. The insulating liquid is dielectric and heat-carrying. The latter isolates the conductors from each other and from the ground. It also ensures the cooling of the active parts of the transformer. The insulating liquid is typically mineral oil or silicone oil.
    Submerged transformers also include an expansion tank. Located on the top of the transformer, the expansion tank allows the level of insulating liquid to vary without impacting the pressure in the transformer or discover the active parts. In fact, the volume of the insulating liquids varies according to the temperature. Thus, as the temperature increases, the insulating liquid expands and the pressure in the transformer increases. Conversely, when the transformer cools, the insulating liquid contracts, the pressure in the transformer decreases.
    The so-called open submerged transformers further comprise a desiccator also called air dryer. The desiccator allows the rejection of the air of the expansion vessel during the expansion of the insulating liquid. It also removes some of the moisture when the insulation liquid contracts and it is necessary that air enters the expansion tank. It is very important that the humidity of the air be removed before it enters the expansion tank because the water content in the exchanged air degrades the dielectric properties of the insulating liquid.
    A transformer dryer usually comprises a dehumidification tank with an inlet for air to be dehumidified and an outlet for dehumidified air and moisture absorbing means.
    The moisture absorption means are generally zeolite type absorbent agents or silica gel in the form of salts or granules. However, the absorption capacities of these agents are limited. It is necessary either to replace them regularly or if they are regenerable to regenerate them before they are saturated with water.
    If the absorbent agents are not replaced or regenerated in time moisture enters the transformer and causes a loss of performance of the insulating liquid. The evaluation of the moisture saturation of the absorbing agents can be done visually. The drier tank is then transparent and the operator visually assesses the state of the absorbent agent. The evaluation is then approximate. This method is therefore unreliable.
    In addition, it does not allow continuous monitoring. The checks carried out by the operators are carried out at defined maintenance frequencies. These operations thus imply a random performance level of the air dryer and may cause degradation of the insulating liquid contained in the transformer generating: the emptying of the infected liquid and its replacement electrical fault if the level of performance of the insulating liquid has strongly decreases.
    Moisture sensors have also been installed in the desiccators to alleviate this problem. However, these sensors measure the overall moisture in the desiccator but do not directly measure the moisture absorption rate of the absorbent agent, or if it has reached its moisture saturation threshold. They therefore do not allow to intervene upstream of the saturation. 3. Objectives of the invention The invention aims to overcome at least some of the known disadvantages of desiccators.
    In particular, the invention also aims to provide, in at least one embodiment of the invention, a desiccator which continuously monitors the moisture absorption rate of the absorbent agent and the arrival of its saturation threshold. The invention also aims to provide, in at least one embodiment, a desiccator whose maintenance is automatable. The invention also aims to provide, in at least one embodiment of the invention, a desiccator whose maintenance cost is reduced. The invention also aims to provide, in at least one embodiment, a desiccator to better prevent damage. The invention also aims to provide, in at least one embodiment, a desiccator for optimized management of the absorbent agent. 4. Presentation of the invention
    To do this, the invention relates to a desiccator for electrical apparatus immersed in an insulating liquid comprising at least one tank comprising: - an air inlet, - an absorbent agent capable of absorbing moisture from the air, the agent absorbent comprising a colored indicator capable of changing the color of the absorbent agent according to its moisture content and - a dehumidified air outlet.
    A desiccator according to the invention is characterized in that it comprises: at least one colorimetric sensor capable of determining the color of the absorbing agent; a management module connected to each colorimetric sensor and configured to be able to process the acquired data; by each colorimetric sensor.
    The color of the absorbent agent is determined by a colorimetric sensor, which makes it possible to have an accurate, reliable and reproducible indication of the color of the absorbent agent and therefore of its moisture content. When the absorbent reaches a certain moisture level, it is considered saturated and can no longer absorb moisture. The colorimetric sensor makes it possible to detect an indicator color of an absorbent agent having reached its saturation threshold. The colorimetric sensor also makes it possible to detect a color indicative of a high humidity level but having not reached the saturation threshold. It thus makes it possible to anticipate the saturation of the absorbing agent. In addition, the color in itself the colorimetric sensor can also detect a color change. This color change may be indicative of the passage of the absorbent agent from one state to another state, for example from a normal moisture absorption rate to a moisture absorption rate requiring intervention.
    The presence of a management module makes it possible to process the data acquired by each sensor, that is to say the data relating to the color determined by each sensor.
    Preferably, the electrical apparatus is a transformer, in particular a transformer for a railway vehicle. Submerged transformers for railway vehicles require special maintenance conditions. Indeed, because of their mobility, their maintenance must be able to be monitored remotely and continuously.
    Typically, the desiccator can be connected via a dehumidified air outlet to the transformer expansion tank to supply dehumidified air. The desiccator removes some of the moisture from the air entering the transformer tank when the insulating liquid contracts and it is necessary for air to enter the expansion tank.
    According to a preferred embodiment, the air inlet and the dehumidified air outlet are located at two opposite ends of the vessel, preferably two opposite ends along the length. The air therefore travels a greater path between the air inlet and outlet which allows a longer contact time with the absorbing agent and better dehumidification.
    According to a preferred embodiment, each tank comprises at least one transparent zone, called screen, so that the color of the absorbent agent is visible from each said screen. The screen being transparent, a colorimetric sensor can determine the color of the absorbent agent through this screen. The absorbing agent may comprise zeolites or silica gel. Preferably, the absorbent is regenerable to facilitate maintenance. Therefore, silica gel that is regenerable is generally preferred to zeolites. The absorbing agent comprises a colored indicator. The color indicator may include cobalt, iron or copper salt. For example, the color indicator may be selected from the group consisting of cobalt chloride, cobalt bromide, cobalt iodide, cobalt thiocyanate, cobalt sulfate, cobalt phosphate, copper bromide, copper chloride, ammonium sulphate and iron and iron bromide.
    Preferably, the iron salts, especially the iron + salts, are preferred because they are less toxic than the copper and cobalt salts and their use is less regulated than that of the cobalt salts. In addition, the iron salts exhibit a noticeable color change even for a slight change in moisture content.
    The desiccator comprises at least one colorimetric sensor capable of determining the color of the absorbent agent.
    The colorimetric sensor may, for example, be a photoelectric or circular LED sensor.
    Each colorimetric sensor can determine the color of the absorbing agent. It can also determine a color change of the latter between a first and a second state. The colorimetric sensor thus makes it possible to determine a moisture content indicative of a saturation of the absorbing agent or of a state close to saturation.
    According to a preferred embodiment, each colorimetric sensor is located outside the tank facing a said screen so as to determine the color of the absorbent agent from outside the tank. This embodiment makes it possible to use the existing transparent or screen desiccators. It suffices to add a device carrying the sensor (s) on the outside of an old desiccator.
    The desiccator according to the invention comprises a management module connected to each colorimetric sensor and configured to be able to process the data acquired by each colorimetric sensor.
    By module, we mean a software element, a subset of a software program, which can be compiled separately, either for independent use, or to be assembled with other modules of a program, or a hardware element, or a combination of a hardware element and a software subprogram. Such a hardware element may comprise an application-specific integrated circuit (better known by the acronym ASIC for the English designation Application-Specific Integrated Circuit) or a programmable logic circuit (better known by the acronym FPGA for the English name Field- Programmable Gâte Array) or a specialized microprocessor circuit (better known by the acronym DSP for the English name Digital Signal Processor) or any equivalent hardware. In general, a module is an element (software and / or hardware) that ensures a function.
    According to a preferred embodiment, the management module is configured to be able to: - transmit information to a maintenance system of the electrical apparatus and / or - control at least one transmitter capable of emitting an alert signal.
    The data acquired by the sensor (s) is processed by the management module. Depending on the data processed, the management module transmits a certain type of information to the maintenance system of the electrical apparatus and / or controls the transmission of a signal by an emitter.
    According to one embodiment, the management module is configured to be able to transmit information to a maintenance system of the electrical apparatus. Thus, if one or more colorimetric sensors determine a color of the absorbing agent indicative of the saturation of the latter or a state close to saturation, the data acquired by the sensor will be processed by the management module. Then, the management module will transmit information relating to the state of the absorbent agent to the maintenance system. Typically, the maintenance system is configured to process and / or record the information transmitted by the management module. The maintenance system may be near the dryer or remotely. Thus, in the case of a transformer for a railway vehicle, the maintenance system can be on board or on the ground. The maintenance system is configured to indicate to the operator in charge of the maintenance when the absorbent agent is to be changed or regenerated.
    According to another embodiment, the management module is configured to be able to control at least one transmitter capable of transmitting an alert signal. The warning signal can be a visual or audible signal. Preferably, the transmitter is an LED and the warning signal is a visual signal consisting of the lighting of the LED. In function, signals emitted by the transmitter, the operator can decide to renew or regenerate the absorbing agent.
    Preferably, the management module is configured to be able to transmit information to a maintenance system of the electrical apparatus and to control at least one transmitter capable of emitting an alert signal. The management module is configured to be able to both transmit information to a maintenance system capable of processing and recording all the information transmitted and control the issuance of an alert signal. The management module is configured so that an operator has data on the saturation of the absorbent agent in a simple manner and accessible directly on the dryer by issuing an alert signal. The operator may also have access to remote data and this data may be compiled to provide more complete information than merely igniting an alert signal.
    According to a preferred embodiment, the air inlet and the dehumidified air outlet are situated at two opposite ends of the vessel and the vessel comprises a plurality of colorimetric sensors. At least two colorimetric sensors are positioned at the same interval, called the level, between the ends of the air inlet and the air outlet and / or at least two colorimetric sensors are positioned at a different level. Air flows from the tank inlet to the tank outlet. As it circulates in the tank, the air is gradually released from its moisture by contact with the absorbing agent. As the air entering the tank is wetter than the outlet air, the absorbent will gradually be saturated with moisture from the air inlet to the dehumidified air outlet. The absorbing agent of the levels closest to the entrance will therefore be saturated before those close to the exit.
    By positioning colorimetric sensors at different levels, it is therefore possible to monitor this evolution of the saturation of the absorbing agent. If only the sensors positioned at the level closest to the inlet determine a color indicative of a saturation of the absorbing agent then the overall moisture absorption rate of the entire absorbent agent contained in the tank can be considered low. If sensors positioned at intermediate levels determine a color indicative of a saturation of the absorbent agent then the overall moisture absorption rate of the whole of the absorbent agent contained in the tank can be considered as average. If sensors positioned near the outlet of the tank determine a color indicative of a saturation of the absorbent agent then the overall moisture absorption rate of all the absorbent agent contained in the tank can be considered high. There is then saturation of the totality of the absorbing agent.
    By positioning sensors at the same level, it is reliable saturation monitoring. Indeed, the color determined by a single sensor may be erroneous, for example because of a faulty sensor or the obstruction of a screen. The acquisition of colorimetric data of the absorbing agent by several colorimetric sensors makes it possible to overcome this risk.
    According to one embodiment, the management module is configured so that when one or more colorimetric sensors of a given level, said level n, determines a given color, called saturation color, information, called level saturation information. n, either transmitted to the maintenance system and / or the transmitter emits a so-called level n saturation alert signal. When one or more colorimetric sensors of the same level determine a color indicative of saturation of the absorbing agent or of an imminent saturation, the level at which they are located gives an indication of the overall moisture absorption rate of the absorber. the absorbent agent in the entire tank. The closer the level is to the outlet of the vessel, the higher the overall saturation of the absorbing agent. Thus, the warning signal emitted by the transmitter can be scaled according to the level of the sensors that have captured a given color and caused the transmission of this signal. For example, a visual signal corresponding to a low saturation level may be emitted when only sensors of a low level have detected a saturation of the absorbing agent, a visual signal corresponding to an intermediate saturation level when the saturation has been detected by intermediate sensors and a signal corresponding to a high saturation level when the saturation has been detected by sensors near the dehumidified air outlet. Similarly, information relating to the moisture content or the saturation of the absorbent agent at a given level can be transmitted to the maintenance system. The maintenance system can then provide the operator with information on the moisture absorption rate or the saturation of the absorbent at a given level, the overall moisture absorption rate of the entire vat and its evolution over time. The maintenance system may also detect a desiccator failure or sensors for example when the data acquired by one or more sensors at a given level are not consistent with the data acquired by the sensors at the levels below or above it.
    According to one embodiment, the management module is configured so that when one or more colorimetric sensors of a given level, said level n, determines a given color, called saturation color, information, called level saturation information. n, is transmitted to the maintenance system.
    According to one embodiment, the management module is configured so that when one or more colorimetric sensors of a given level, said level n, determines a given color, called the saturation color, the transmitter emits a signal called a signal. level saturation alert.
    According to one embodiment, the management module is configured so that when one or more colorimetric sensors of a given level, said level n, determines a given color, called saturation color, information, called level saturation information. n, is transmitted to the maintenance system and the transmitter emits a so-called signal saturation alert level n.
    Preferably, the management module is configured so that when all the colorimetric sensors of a given level, said level n, determines a given color, called saturation color, information, called saturation information of the level n, is transmitted to the maintenance system and / or at least one transmitter emits a so-called level n saturation alert signal. To ensure that the emission of a level n saturation alert signal or the transmission of level saturation information is not performed because of an artefact on a single level sensor or that the saturation at this level is homogeneous, the transmission or transmission is performed if all the sensors of the same level determines a given color. It may also be a given number of sensors, for example all the sensors of the same level except for one. The invention also relates to a transformer comprising a desiccator according to the invention. Typically, the transformer called submerged transformer is a transformer whose active parts are immersed in an insulating liquid. The submerged transformer includes an expansion vessel that allows the oil level to vary without impacting the pressure in the transformer or discovering the active parts. The dehumidified air outlet of the dryer according to the invention is connected to the expansion tank in order to supply the latter with dehumidified air.
    According to a preferred embodiment, the transformer is a transformer for a railway vehicle. The invention also relates to a method of monitoring a transformer equipped with a desiccator according to the invention comprising the steps of: - determining the color of the absorbing agent by at least one colorimetric sensor and - if at least one sensor colorimetric of a given level, said level n, determines a given color, called saturation color, - information, called saturation information of the level n, is transmitted to a maintenance system of the transformer and / or - a transmitter emits a signal said warning signal saturation level n. 5. List of Figures Other objects, features and advantages of the invention will appear on reading the following description given solely by way of non-limiting example and which refers to the appended figures in which: FIG. 1 is a diagrammatic view of FIG. A desiccator according to one embodiment of the invention with emitters; FIG. 2 is a schematic view of a desiccator according to one embodiment of the invention with an information transmission to a maintenance system. 6. Detailed description of an embodiment of the invention
    In the figure, the scales and the proportions are not strictly respected and this, for purposes of illustration and clarity. The invention is not limited to the embodiments described.
    Figures let 2 represent two embodiments of the desiccator 1 according to the invention.
    As shown in FIGS. 1 and 2, the desiccator 1 comprises a vessel 2 of cylindrical shape.
    The tank 2 comprises an absorbent agent 4 capable of absorbing moisture from the air. The absorbent agent 4 is composed of silica beads. The air enters the tank 2 through the air inlet 3 located at the bottom of the tank 2. It is heated by a heating device (not shown) and flows through the absorbing agent 4 to the outlet 5 dehumidified air located at the top of the tank 2. The dehumidified air outlet 5 is intended to be connected to the expansion vessel of a submerged transformer. The absorbent agent 4 comprises a colored indicator capable of changing the color of the absorbent agent 4 as a function of its moisture content. The colored indicator comprises Fe3 + salt. The absorbent agent 4 then changes from orange to white color as the absorbent 4 picks up a certain amount of moisture. Such absorbent agents 4 comprising a colored indicator are marketed in the form of silica beads of the Sorbead Orange Chameleon® brand. The absorbent agent 4 thus has an orange color when it has not absorbed moisture and as it absorbs moisture it goes from orange to white. The white color indicates that the saturation level from which it can no longer absorb additional moisture is reached.
    In order to be able to observe this color change, the tank 2 is made of transparent material such as glass or a transparent plastic material of the plexiglass type. The outside of the tank 2 is reinforced by a protective metal shield such as stainless steel in which screens are drilled so that the inside of the tank 2 is visible through these screens 6.
    The dryer 1 further comprises several colorimetric sensors (7a, 7b, 7c) able to determine the color of the absorbent agent 4. They can therefore determine all the color hues between the orange indicative of an absorbent agent 4 having no not absorbed moisture and white indicative of an absorbent agent 4 to saturation. These sensors 7 may be colorimetric sensors photoelectric or circular LED. These colorimetric sensors 7 are positioned at different levels of the tank 2. Each level corresponds to a gap between the inlet ends 3 and outlet 5 of the tank 2. In this case, the tank 2 being cylindrical, the inlet 3 being located at the bottom of the latter and the outlet 5 at the top, each level corresponds to a high data of the tank 2.
    Each colorimetric sensor 7 is connected to a management module 8 configured to be able to process the data acquired by each of the colorimetric sensors (7a, 7b, 7c). The management module 8 may in particular compare the data relating to the color of the absorbent agent 4 to a threshold color value or to previously acquired data or to match them with a moisture absorption rate or saturation.
    The management module 8 is configured so that when one or more colorimetric sensors 7 of a given level, said level n, determines a given color, called the saturation color, the transmitter 9 emits a signal called a saturation warning signal. the level n as shown in Figure 1 and / or information, said saturation information level n, is transmitted to the maintenance system 10.
    The saturation color may be the indicator color that the absorbent agent 4 has reached saturation, for example white for Sorbead Orange Chameieon® type silica beads. The saturation color may also be a color indicative of a state close to saturation, for example a very slightly orange white to anticipate saturation. The saturation color can also be determined by comparison with the color of the absorbent agent 4 at a given instant, for example at the origin, before it absorbs moisture. We seek then not a precise color but a change of color more or less marked indicator of a change of state.
    The sensor 7a determines the color of the absorbent agent 4 at level a, the sensor 7b determines the color of the absorbent agent 4 at level b, the sensor 7c determines the color of the absorbent agent 4 at level c. Since the levels a to c are located from bottom to top of the tank 2, because of the air circulation, the absorbent agent 4 of the level a should be saturated first and then that of the level b and that of the level c.
    According to the embodiment shown in FIG. 1, the management module 8 is configured to be able to control one or more transmitters 9 able to emit an alert signal.
    When the sensor 7a determines that the absorbing agent 4 of the level a has reached the saturation color, the management module 8 processes this data and commands the transmitter 9 to emit a warning signal saturation level a. In this case, the warning signal saturation level a corresponds to the lighting of the LED 9a. Since the level a is situated at the bottom of the tank 2 near the air inlet 3, the saturation of the level a is indicative of a low overall saturation of the absorbent agent 4 of the tank 2.
    When the sensor 7b determines that the absorbent agent 4 of the level b has reached the saturation color, the management module 8 processes this data and commands the transmitter 9 to emit a level b warning signal. In this case, the warning signal saturation level b corresponds to the lighting of the LED 9b. The LED 9a is then normally lit because the saturation of level a intervenes before that of level b. According to the configuration of the management module 8, the lighting of the LED 9b can cause the extinction of the LED 9a or not. Since the level b is situated at an intermediate level of the tank 2 between the air intake 3 and the air outlet 5, the saturation of the level b is indicative of an overall saturation of the average absorbent agent 4.
    When the sensor 7c determines that the absorbent agent 4 of the level c has reached the saturation color, the management module 8 processes this data and commands the transmitter 9 to emit a level c warning signal. In this case, the warning signal saturation level c corresponds to the lighting of the LED 9c. The LED 9b is then normally lit because the saturation of the level b intervenes before that of the level c. According to the configuration of the management module 8, the lighting of the LED 9c can cause the extinction of the LED 9b or not. Since the level c is situated at the top of the tank 2 near the air outlet 5, the saturation of the level c is indicative of a high overall saturation of the absorbent agent 4.
    According to the embodiment shown in FIG. 2, the management module 8 is configured to be able to transmit information to a maintenance system 10 of the electrical apparatus.
    When the sensor 7a determines that the absorbent agent 4 of the level aa reaches the saturation color, the management module 8 processes this data and transmits saturation information of the level a to the maintenance system 10. The maintenance system 10 can be located remote from the desiccator 1, the information can then be transmitted via a remote diagnostic system or a dedicated GSM / GSMR tag equipped with a SIM card.
    When the sensor 7b determines that the absorbent agent 4 of the ba level reaches the saturation color, the management module 8 processes this data and the management module 8 processes this data and transmits saturation information of the level b to the maintenance system. 10.
    Likewise, when the sensor 7c determines that the absorbent agent 4 of the level c has reached the saturation color, the management module 8 processes this data and transmits level-saturation information c to the maintenance system 10.
    The maintenance system 10 processes all of these data, it can register them, check their relevance and inform the operator that a maintenance operation is necessary or can be envisaged at a given date. For example, c-level saturation information is indicative that a maintenance operation must be scheduled very quickly. Level b saturation information is indicative that a maintenance operation must be scheduled at a certain date. This date can be determined from information that has been acquired since the beginning of this maintenance cycle that is to say since the absorbent agent 4 has been regenerated or from information acquired in previous cycles and which, when processed, make it possible to evaluate the optimum maintenance date.
    权利要求:
    Claims (9)
    [1" id="c-fr-0001]
    1. Desiccator (1) for electrical apparatus immersed in an insulating liquid comprising at least one tank (2) comprising: an inlet (3) of air, an absorbent agent (4) capable of absorbing moisture from the air, the absorbing agent (4) comprising a colored indicator capable of changing the color of the absorbent agent (4) according to its moisture content, an outlet (5) of dehumidified air, characterized in that the desiccator (1 ) comprises: at least one colorimetric sensor (7) capable of determining the color of the absorbing agent (4), a management module (8) connected to each colorimetric sensor (7) and configured to be able to process the data acquired by each colorimetric sensor (7).
    [2" id="c-fr-0002]
    2. Desiccator (1) according to claim 1 characterized in that the management module (8) is configured to be able to: transmit information to a maintenance system (10) of the electrical apparatus and / or control at least one transmitter (9) adapted to emit an alert signal.
    [3" id="c-fr-0003]
    3. Desiccator (1) according to claim 1 or 2 characterized in that the inlet (3) of air and the outlet (5) of dehumidified air are located at two opposite ends of the tank (2) and in that that the tank (2) comprises a plurality of colorimetric sensors (7), at least two colorimetric sensors (7) being positioned at the same interval, said level, between the ends of the air inlet (3) and the outlet (5). ) air and / or at least four colorimetric sensors (7) being positioned at a said different level.
    [4" id="c-fr-0004]
    4. Desiccator (1) according to any one of claims 1 to 3 characterized in that the management module (8) is configured so that when one or more colorimetric sensors (7) of a given level, said level n , determines a given color, called saturation color, information, called saturation information level m, is transmitted to the maintenance system (10) and / or the transmitter (9) emits a signal said warning signal saturation of the level n.
    [5" id="c-fr-0005]
    5. Desiccator (1) according to claim 4 characterized in that the management module (8) is configured so that when all the colorimetric sensors (7) of a given level, said level n, determines a given color, said saturation color, information, said saturation information level n, is transmitted to the maintenance system (10) and / or at least one transmitter (9) emits a so-called signal saturation alert level n.
    [6" id="c-fr-0006]
    6. Desiccator (1) according to any one of claims 1 to 5 characterized in that the vessel (2) comprises at least one transparent zone, called screen (6), so that the color of the absorbing agent (4) is visible from each said screen (6).
    [7" id="c-fr-0007]
    7. Desiccator (1) according to claim 6 characterized in that each colorimetric sensor (7) is located outside the tank (2) facing a said screen (6) so as to determine the color of the absorbing agent (4) from outside the vessel (2),
    [8" id="c-fr-0008]
    8. Transformer characterized in that it comprises a desiccator (1) as defined according to any one of claims 1 to 7.
    [9" id="c-fr-0009]
    9. A method of monitoring a transformer equipped with a desiccator (1) as defined in any one of claims 1 to 7 characterized in that it comprises the steps of: determining the color of the absorbent agent (4) by at least one colorimetric sensor (7) and information transmission, said n level saturation information, to a maintenance system (10) of the transformer and / or a signal transmission, said warning signal saturation level n, by a transmitter (9), if at least one colorimetric sensor (7) of a given level, said level n, determines a given color, called saturation color.
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    同族专利:
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    EP3154070A1|2017-04-12|
    FR3042306B1|2017-10-27|
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    DE102018207847A1|2018-05-18|2019-11-21|Siemens Aktiengesellschaft|vehicle transformer|
    EP3594973A1|2018-07-11|2020-01-15|ABB Schweiz AG|A detection device for a power transformer breather|
    EP3806114A1|2019-10-09|2021-04-14|ABB Schweiz AG|A breather device for a power electrical apparatus|
    CN110767423B|2019-11-14|2020-08-28|浙江镜小二网络科技有限公司|Transformer respirator with optimized structure|
    法律状态:
    2016-10-28| PLFP| Fee payment|Year of fee payment: 2 |
    2017-04-14| PLSC| Publication of the preliminary search report|Effective date: 20170414 |
    2017-10-31| PLFP| Fee payment|Year of fee payment: 3 |
    2018-10-30| PLFP| Fee payment|Year of fee payment: 4 |
    2019-10-31| PLFP| Fee payment|Year of fee payment: 5 |
    2020-10-30| PLFP| Fee payment|Year of fee payment: 6 |
    2021-10-29| PLFP| Fee payment|Year of fee payment: 7 |
    2021-11-12| TP| Transmission of property|Owner name: SNCF VOYAGEURS, FR Effective date: 20211004 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1559588A|FR3042306B1|2015-10-08|2015-10-08|DRIVER FOR IMMERSE ELECTRICAL APPLIANCE|FR1559588A| FR3042306B1|2015-10-08|2015-10-08|DRIVER FOR IMMERSE ELECTRICAL APPLIANCE|
    EP16192756.1A| EP3154070A1|2015-10-08|2016-10-07|Desiccator for immersed electrical device|
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