JPH077114U - Oil temperature monitoring device for oil-filled electrical equipment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The purpose is to facilitate monitoring of the temperature of insulating oil in oil-filled electrical equipment. [Structure] An electric signal corresponding to the oil temperature of insulating oil of an oil-filled electrical device is output from a temperature sensor 10. An electric signal from the temperature sensor 10 is applied to the indicating instrument 12 by wiring. Since the temperature sensor 10 and the indicating instrument 12 are connected by a wire,
The installation position of the temperature sensor 10 is not restricted. Therefore, the indicating instrument 12 can be attached to the front surface of the operation box 5 placed on the front surface of the oil-filled electric device. This facilitates visual confirmation of the display surface of the indicating instrument 12, that is, monitoring of the oil temperature.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil temperature monitoring device for oil-filled electrical equipment.

[0002]

[Prior art]

 3 and 4 show conventional examples. The oil-filled electrical equipment shown here is a capacitor facility, a tank 1 for storing a capacitor, a tank 2 mounted on the tank 1 for storing a reactor connected in series with the capacitor, a tank 1 and a tank. And an oil amount adjuster 3 for adjusting the amount of insulating oil in 2. Reference numeral 4 is a radiator installed on the back surface of the tank 2, 5 is an operation box in which an operation mechanism such as a contactor is housed, and 6 is a door of the operation box 5. In order to open and close the door 6, the operation box 5 needs to be installed in front of the tank 2.

In order to monitor the temperature of the insulating oil in the tank 2, conventionally, a heat-sensitive part 7 that responds to the oil temperature is provided above the inside of the tank 2, and a temperature indicator 8 and a temperature indicator 8 are enclosed inside the liquid. The monitoring device is constructed by connecting the pipes 9 through the existing pipe 9. According to this, the temperature of the heat-sensitive part 7 changes due to the change of the oil temperature, and the volume of the liquid in the pipe 9 changes with this change, so that the temperature indicator 8 is mechanically driven. The oil temperature was monitored from the indicated value.

According to the monitoring device having such a configuration, the thermosensitive unit 7, the pipe 9 and the temperature indicator 8 cannot be disconnected, so that the positional relationship for installing them is restricted, and the thermosensitive unit 7, the pipe 9 and the temperature indicator 8 are mutually restricted at arbitrary positions. It cannot be installed separately. Therefore, these are attached to the tank 2 as shown in the figure.

When the temperature indicator 8 is mounted on the tank 2 in this way, the temperature indicator 8 is hidden behind the operation box 5 provided on the front surface, so that the display surface must be mounted so as to face the rear surface side of the tank 2. I don't get it. However, when another capacitor facility is installed on the back side, or because of the installation location, there may be no space for people on the back side, making it difficult to see the display surface of the temperature indicator 8. The same applies when the display surface is attached to the side surface of the tank 2.

[0006]

[Problems to be solved by the device]

 The present invention aims to facilitate monitoring of the temperature of insulating oil in an oil-filled electrical device.

[0007]

[Means for Solving the Problems]

 The present invention uses a temperature sensor that generates an electric signal according to the oil temperature, and the electric signal from this temperature sensor is applied to the indicating instrument using wiring, and this indicating instrument is mounted on the front of the operation box. It is characterized by doing so.

[0008]

[Action]

 Even if the temperature sensor is attached to the oil-filled electrical equipment, it is only necessary to connect it to the indicating instrument by wiring, so the installation position of the indicating instrument is not restricted by the position of the temperature sensor, but at any position. You may Therefore, the oil temperature can be easily monitored by mounting this indicator on the front of the operation box.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. Note that the portions denoted by the same reference numerals as those in FIGS. 3 and 4 indicate the same or corresponding portions. According to the present invention, the temperature sensor 10 is attached to the tank 2. As the temperature sensor 10, one that outputs an electric signal having a value corresponding to the temperature of the insulating oil in the tank 2 is used. For example, a semiconductor element whose electric resistance value changes according to the oil temperature, or a thermocouple that produces an electromotive force can be used.

A wire 11 is connected to the temperature sensor 10, which is an indicator instrument (for example, a digital indicator instrument or an analog indicator instrument) attached to the front surface of the operation box 5, specifically, the door 6 of the operation box 5. ) 12 is connected. Due to this connection, the line 11 runs inside the operating box 5. The indicator 12 displays the oil temperature according to the electric signal sent from the temperature sensor 10.

In such a configuration, the temperature sensor 10 and the indicating instrument 12 are only connected by the line 11, so the indicating instrument 12 can be installed at any position. Therefore, it becomes possible to attach this to the front surface of the operation box 5, and by attaching it here, it becomes easy to visually recognize the display surface of the indicating instrument 12.

Further, since there is no restriction on the mounting position, the work at the time of installation becomes easy and the maintenance and inspection becomes easy. Furthermore, since there is no mechanical moving part as in the past and the display is made according to the electric signal, the occurrence of failure is reduced.

[0013]

[Effect of device]

 As described above, according to the present invention, when monitoring the oil temperature placed in the oil-filled electrical equipment, the oil temperature indicator can be installed on the operation box without being restricted by the installation position unlike the conventional configuration. Since it can be installed on the surface, this kind of monitoring is easy, and the installation work and the like are easy, and the number of failures is reduced.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view of a conventional example.

FIG. 4 is a front view of FIG.

[Explanation of symbols]

 2 Tank containing oil-filled electrical equipment (reactor) 5 Operation box 6 Door 10 Temperature sensor 11 Wire 12 Oil temperature indicator

Claims (1)

[Scope of utility model registration request] 1. An instruction that an oil-filled electric device is provided with a temperature sensor that generates an electric signal according to the oil temperature of insulating oil of the oil-filled electric device, and an electric signal from the temperature sensor is given through a wiring. An oil temperature monitoring device for oil-filled electrical equipment, comprising a meter attached to the front of an operation box for the oil-filled electrical equipment provided on the front surface of the oil-filled electrical equipment.