JP2012047661A - Abnormal heat alarm device for power distribution equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormal heat alarm device for power distribution equipment for appropriately warning generation of abnormal heat at a connection part or the like in the power distribution equipment.SOLUTION: The abnormal heat alarm device 10 includes: a thermoelectric conversion device (thermoelectric transducer) 11 fixed to a first bus line (conductor for power distribution) 1 near the connection part 3 with a bolt 14 where the first bus line and a second bus line (conductor for power distribution) 2 are connected to a connection joint (conductor) 4 with a bolt 5; an alarm sound generator 12 for generating alarm sound by using electric energy converted by the thermoelectric transducer 11; and a light emitting device (LED) 13 for emitting light.

Description

  The present invention relates to an abnormal heat alarm device that warns of occurrence of abnormal heat (abnormal heat generation) in power distribution equipment.

  In power distribution equipment, if abnormal heat (abnormal heat generation) occurs due to poor contact at the connection, there is a risk of electrical accidents.

  Conventionally, as a method of detecting abnormal heat at a connection part or the like in a power distribution facility, a method of detecting abnormal heat by using temperature measurement by an infrared temperature measurement device or temperature discoloration by a thermo tape is generally performed. (For example, refer to Patent Document 1).

Japanese Utility Model Publication No. 3-51338

  However, in the method for detecting the occurrence of abnormal heat in the distribution equipment using the infrared temperature measuring device as described above, it is necessary for the operator to measure the temperature with the infrared temperature measurement. Only abnormal heat can be detected.

  In particular, since the safety shield (iron plate, etc.) is installed at the connection between the busbar and the circuit breaker inside the switchboard and the connection between the branch bus and the cable, the operator cannot see it directly. There is a problem that the temperature cannot be measured by the infrared temperature measuring device. Further, normally, in the switchboard, the circuit breaker is disposed on the front surface, and the part hidden behind the circuit breaker cannot be directly seen by the operator, so there is a similar problem.

  In addition, the above-described method for detecting the occurrence of abnormal heat in the distribution facility using the thermo tape similarly has a problem that the temperature change of the thermo tape can be recognized only within the range visible to the operator's eyes. is there. There is also a demand thermo tape that checks for an abnormal temperature rise in the event of a power failure. However, for safety, there is a drawback that the abnormal temperature rise cannot be checked without a power failure.

  The present invention has been made in view of the circumstances as described above, and provides an abnormal heat alarm device for a distribution facility capable of accurately alarming the occurrence of abnormal heat at a connection portion or the like in the distribution facility. It is the purpose.

  In order to solve the above problems, the present invention has the following features.

  [1] An abnormal heat alarm device for alarming the occurrence of abnormal heat in power distribution equipment, using a thermoelectric conversion element that converts thermal energy generated by abnormal heat into electric energy, and electric energy converted by the thermoelectric conversion element An abnormal heat alarm device for power distribution equipment, comprising alarm generating means for issuing an alarm.

  [2] The alarm generation means includes an alarm sound generating device that emits an alarm sound using the electric energy converted by the thermoelectric conversion element, a light emitting device that emits light using the electric energy converted by the thermoelectric conversion element, and The abnormal heat alarm device for power distribution equipment according to [1] above, wherein the device is one or more devices selected from radio wave transmitters that transmit radio waves using electrical energy converted by thermoelectric conversion elements .

  [3] The above [1] or [3], wherein the alarm generation means issues an alarm when the magnitude of the electric energy converted by the thermoelectric conversion element exceeds a predetermined upper limit value. [2] The abnormal heat alarm device for power distribution equipment according to [2].

  [4] The alarm according to any one of [1] to [3], wherein a difference is provided in an alarm issued by the alarm generation unit according to the magnitude of electric energy converted by the thermoelectric conversion element. Power distribution equipment abnormal heat alarm device.

  In the present invention, it is possible to accurately warn of occurrence of abnormal heat at a connection portion or the like in the power distribution facility.

It is a figure which shows one Embodiment of this invention. It is a figure which shows an example of the thermoelectric conversion characteristic of a thermoelectric conversion element.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an abnormal heat alarm device according to an embodiment of the present invention. The abnormal heat alarm device according to this embodiment is installed at or near a site where the occurrence of abnormal heat is a concern in the distribution facility, and warns the occurrence of abnormal heat at the site.

  By the way, the parts that are concerned about the occurrence of abnormal heat in power distribution facilities are the connection part between the bus and the bus, the connection part between the bus and the circuit breaker, the connection part between the bus and the cable, and the abnormal heat generation alarm according to this embodiment. The apparatus is installed at a connecting portion (including the vicinity thereof) between the bus and the bus so as to warn the occurrence of abnormal heat at the connecting portion.

  That is, as shown in FIG. 1, in the abnormal heat alarm device 10 according to this embodiment, a first busbar (distribution conductor) 1 and a second busbar (distribution conductor) 2 are connected joints (conductors) 4. And a thermoelectric conversion device (with a built-in thermoelectric conversion element) 11 fixed to the first bus 1 near the connection portion 3 connected by the bolt 5 with a bolt 14, and an alarm sound is generated in the thermoelectric conversion device 11. A generator 12 and a light emitting device (LED) 13 are attached.

  In the abnormal heat alarm device 10, when abnormal heat occurs in the connection portion 3, the thermoelectric conversion device (thermoelectric conversion element) 11 converts the heat energy generated by the abnormal heat into electric energy. That is, the thermoelectric conversion device (thermoelectric conversion element) 11 generates power using a temperature difference between abnormal heat (100 ° C. to 280 ° C.) and normal ambient temperature (0 ° C. to 50 ° C.). Incidentally, FIG. 2 shows an example of the thermoelectric conversion characteristics of the thermoelectric conversion element 11 (relationship between temperature difference (heating surface-cooling surface) and power generation amount).

  Then, using the electric energy generated by the thermoelectric conversion device (thermoelectric conversion element) 11, the alarm sound generation device 12 emits an alarm sound and the light emitting device (LED) 13 emits flicker. Thereby, it is possible to detect that abnormal heat has occurred in the connecting portion 3.

  Here, since the material of the first bus 1 and the second bus 2 is copper, the thermal conductivity is good, and the abnormal heat alarm device 10 is connected to the vicinity of the connection point 3 (the first bus 1 and the second bus 2 ), It is possible to accurately detect abnormal heat.

  Further, the abnormal heat alarm installation 10 has a compact size such as 50 mm × 50 mm × 10 mm, and even if it is fixed to the bus, it does not break down because it has the same potential while the bus is energized.

  Thus, in this embodiment, as the online alarm / detection during the operation of the distribution facility, the first bus 1 and the second bus 2 are generated by the alarm sound by the alarm sound generator 12 and the flicker emission by the light emitting device 13. The occurrence of abnormal heat at the connection point 3 can be accurately alarmed and detected.

  In the above embodiment, as the alarm generating means, the alarm sound generating device 12 that emits an alarm sound using the electric energy generated by the thermoelectric conversion device (thermoelectric conversion element) 11 and the light emitting device (LED) that similarly emits flicker. However, a radio wave transmission device that generates radio waves using electrical energy generated by the thermoelectric conversion device (thermoelectric conversion element) 11 may be provided. By receiving the radio wave transmitted by the radio wave transmission device, it is possible to perform alarm / detection at a distance.

  And in said embodiment, although the abnormal heat alarm apparatus is installed in the connection part (including the vicinity) of a bus line and a bus line, other connection parts (bus line and circuit breaker) in which the occurrence of abnormal heat is a concern. The present invention can be similarly applied to a connection portion, a bus and a cable connection portion, and the like.

  As for the alarm generating means, one or a plurality of devices selected from the above alarm sound generating device, light emitting device and radio wave transmitter are appropriately provided according to the installation site of the abnormal heat alarm setting. do it.

  At that time, when the magnitude of the electric energy converted by the thermoelectric conversion element exceeds a predetermined control value (upper limit value), an alarm generating means (alarm sound generator, light emitting device, radio wave transmitter) (Sound, light, radio waves) are preferably emitted.

  For example, in the case where the thermoelectric conversion element having the thermoelectric conversion characteristics shown in FIG. 2 is used, if the temperature difference exceeds 50 ° C., the heat generation is 10 W when the temperature difference is 50 ° C. The alarm generation means may issue an alarm when the amount of power generated by the thermoelectric conversion device (thermoelectric conversion element) exceeds 10 W.

  In addition, according to the magnitude of the electric energy converted by the thermoelectric conversion element, the alarm (alarm sound, light, radio wave) issued by the alarm generating means (alarm sound generating device, light emitting device, radio wave transmitter) is ranked. It is also preferable to do this.

  For example, in the case of using the thermoelectric conversion element having the thermoelectric conversion characteristics shown in FIG. 2, if the temperature difference exceeds 100 ° C., the power generation amount 39 W when the temperature difference is 100 ° C. is ranked as a very serious abnormal heat. It is determined as a boundary value, and when the power generation amount generated by the thermoelectric conversion device (thermoelectric conversion element) exceeds 39 W, the alarm rank (volume, light emission amount) issued by the alarm generation means compared to when the power generation amount is 39 W or less. Etc.).

  In this way, by using the abnormal heat alarm installation as described above, it is possible to accurately alarm and detect the occurrence of abnormal heat in a portion hidden behind a safety shield or a circuit breaker. As a result, there is no need for the conventional work for the operator to measure the temperature using the infrared temperature measuring device or the work for checking the abnormal temperature rise with the demand thermo tape after a power failure.

1 First bus (conductor for power distribution)
2 Second bus (conductor for power distribution)
3 Connection between first busbar and second busbar 4 Connection joint (conductor)
5 bolts (for connecting the first busbar / second busbar and connecting joint)
10 Abnormal heat alarm installation 11 Thermoelectric conversion device (thermoelectric conversion element)
12 Alarm sound generator 13 Light emitting device (LED)
14 Volts (for connecting busbar and thermoelectric converter)

Claims (4)

  An abnormal heat alarm device for alarming the occurrence of abnormal heat in a distribution facility, wherein a thermoelectric conversion element that converts thermal energy generated by abnormal heat into electric energy and an electric energy converted by the thermoelectric conversion element are used to generate an alarm. An abnormal heat alarm device for power distribution equipment, characterized by comprising an alarm generating means for emitting power.   The alarm generating means includes an alarm sound generating device that emits an alarm sound using electric energy converted by the thermoelectric conversion element, a light emitting device that emits light using electric energy converted by the thermoelectric conversion element, and the thermoelectric conversion element. 2. The abnormal heat alarm device for power distribution equipment according to claim 1, wherein the device is one or more devices selected from among radio wave transmitting devices that transmit radio waves using electrical energy converted by the electric power.   3. The power distribution according to claim 1, wherein when the magnitude of the electric energy converted by the thermoelectric conversion element exceeds a predetermined upper limit value, the alarm generation means issues an alarm. Equipment abnormal heat alarm device.   The abnormal heat of the distribution equipment according to any one of claims 1 to 3, wherein a difference is provided in an alarm issued by the alarm generation means according to the magnitude of electric energy converted by the thermoelectric conversion element. Alarm device.

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