JP4384381B2 - Special high voltage detector checker and special high voltage detector check method - Google Patents

Description

[0001]
The present invention relates to a special high voltage detector checker for checking the operation of the special high voltage detector and a method for checking the special high voltage detector.
[0002]
[Prior art]
Conventionally, a special high voltage detector is used to test the charging of a special high voltage line such as a high voltage transmission line and display whether it is a live line (charging) or a dead line (during power failure). As shown in FIG. 7, such an extra high voltage detector is configured such that an operator 101 holds the extra high voltage detector 102 to the extra high voltage path 103 such as an extra high voltage transmission line. Used by bringing the detector 104 of the voltage detector 102 into contact.
[0003]
Note that the worker 101 supports the special high voltage detector 102 through the long support rod 106 in a state where the worker 101 climbs the steel tower 105 that supports the special high piezoelectric path 103, and the special high voltage detector 102. Is used.
[0004]
As shown in the equivalent circuit shown in FIG. 8, the extra high voltage detector 102 includes a current detection element 107 connected to the detector 104. In the special high voltage detector 102, when the detector 104 is brought into contact with the special high piezoelectric path 103, the ground voltage E of the special high piezoelectric path 103 is applied to the current detection element 107 via the detector 104, and this current detection is performed. A minute current I flows through the detector 104 through the detector 104 in accordance with the floating capacitance (C) 108 between the current detector 107 and the ground. The extra high voltage detector 102 detects a minute current I flowing through the current detection element 107, and the extra high voltage path 103 is a live line (during charging) or a dead line (during power outage) depending on the detection result. Display whether it is [0005]
Conventionally, as a special high voltage detector checker for checking the quality of the operation state of such a special high voltage detector, a high voltage pulse is generated using a piezoelectric element, and this high voltage is used as a special high voltage detector. Some are configured to be applied to the detector of the electrical detector. That is, if a special high voltage detector is used to indicate that the display of the special high voltage detector is “live” when a high voltage is applied to the detector, It is determined that the voltage detector is operating normally.
[0006]
[Problems to be solved by the invention]
By the way, in the special high voltage detector checker that generates a pulsed high voltage using a piezoelectric element as described above, the operation cannot be confirmed by the voltage of the commercial frequency (50 Hz to 60 Hz sine wave). It is not suitable for correctly judging the operating state of electric appliances.
[0007]
Therefore, an extra high voltage detector checker is conceivable in which a voltage of a commercial frequency (50 Hz to 60 Hz sine wave) is applied to the detector to check the operation of the extra high voltage detector.
[0008]
However, such a special high voltage detector checker must generate a high voltage comparable to the ground voltage of the special high piezoelectric path as a voltage for operation confirmation. Then, such an extra high voltage detector checker is configured to include a large output transformer (transformer), and the entire apparatus becomes large in size and not easily portable. For example, such an extra high voltage voltage detector checker is about the size of a trunk case, making it difficult to carry.
[0009]
The operation check of the special high-voltage voltage detector is basically performed immediately before the power application test. Therefore, it is necessary to carry the special high voltage detector checker in a place where the special high voltage detector is used, that is, in the vicinity of the special high piezoelectric path, or in some cases on a steel tower.
[0010]
Therefore, the present invention has been proposed in view of the above circumstances, and is small, lightweight, convenient to carry, can be easily carried to the work site of a power test, and has a commercial frequency (50 Hz). An object of the present invention is to provide an extra high voltage detector checker and a method of checking the extra high voltage detector, which can confirm the operation of the extra high voltage detector with a test voltage of up to 60 Hz.
[0011]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above object, and the first invention (the invention according to claim 1) is a frequency of a special high voltage to be subjected to a power application test by a special high voltage detector. A sine wave oscillation circuit that generates a sine wave of 55 Hz that is a frequency substantially equal to 50 Hz or 60 Hz, or an intermediate value thereof, and an amplification that amplifies the sine wave generated by the sine wave oscillation circuit circuit and, one connected to the other output terminal is wrapped continuously conductivity該特by high-pressure electroscope housing output end to a special high-pressure electroscope sensing element as well as boosting the sine wave is amplified by the amplifier circuit And a step-up transformer connected to the seat.
[0012]
Furthermore, special high-pressure electroscope checker according to the first invention, the conductive sheet is flexible, flexibility and conductivity are formed of a conductive rubber or conductive fabric having the above-mentioned special high-pressure test when wrapped collector housing, between the particular high-pressure electroscope current sensing element, so that large electrostatic capacity can be secured than the stray capacitance between the current detection element and the ground and it is characterized in that formed by configuration.
In this special high voltage detector checker, when the ground voltage of the special high voltage circuit to be subjected to the electric charge test is, for example, a voltage of a commercial frequency (50 Hz to 60 Hz), the voltage test is performed on the special high voltage circuit. The operation of the special high voltage detector can be confirmed under the same conditions as those used.
[0013]
That is, in the extra high voltage detector checker according to the first aspect of the present invention, a predetermined capacitance is secured between the current detection element of the extra high voltage detector and the conductive sheet, so that the step-up transformer Even if the voltage applied to the detector of the extra high voltage voltage detector is lower than the ground voltage of the special high voltage circuit subject to the voltage test, it is the same as conducting the voltage test on this special high voltage circuit. Under certain conditions, the operation of the special high voltage detector can be confirmed.
[0014]
According to a second aspect of the present invention (invention 2) , a step-up transformer boosts a sine wave having a frequency substantially equal to the frequency of the extra-high voltage to be subjected to a power application test by the extra-high-voltage detector. One output end of the transformer is connected to the detector of the special high voltage detector, and the other output end of the step-up transformer is connected to the conductive sheet that encloses the casing of the special high voltage detector. In the state in which a capacitance larger than the floating capacitance is secured between the current detection element and the conductive sheet with a special high voltage detector, the detector of the special high voltage detector is used. A sine wave is applied by a step-up transformer, and the operation of the extra high voltage detector is checked.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an extra high voltage detector checker according to an embodiment of the present invention will be described in detail with reference to the drawings.
[0020]
The special high voltage detector checker according to this embodiment is an apparatus for performing an operation check (check) of the special high voltage detector for performing an electric charge test of a special high piezoelectric path, as shown in FIG. A main body portion 2 having an outer casing 1 is provided. The main body portion 2 houses an electronic circuit portion that generates a voltage for confirming the operation of the extra high voltage detector. The main body 2 is provided with a high-voltage lead wire 3 and a ground wire 4 for outputting a voltage for operation confirmation to the outside. Further, the main body 2 includes an operation switch 5 for starting operation confirmation and an operation indicator lamp 6 for displaying an operation state on the outer surface of the outer casing 1.
[0021]
As shown in FIG. 2, the electronic circuit section in the main body 2 includes a sine wave oscillation circuit 7, an amplification circuit 8 for amplifying the sine wave generated by the sine wave oscillation circuit 7, and the amplification circuit. And a step-up transformer 9 for further stepping up the sine wave amplified by 8.
[0022]
The sine wave oscillating circuit 7 has a frequency approximately equal to the frequency of the voltage for which the extra high voltage analyzer performs the voltage application test, for example, 50 Hz, which is a commercial frequency, 60 Hz, or an intermediate value between 50 Hz and 60 Hz. A 55 Hz sine wave is oscillated. The step-up transformer 9 steps up the sine wave amplified by the amplifier circuit 8 to a high voltage of about 2000 V and outputs it from the output terminals 10 and 11.
[0023]
The power for these circuits and the operation indicator lamp 6 is supplied by the dry battery 10 via the operation switch 5. That is, in this extra high voltage detector checker, when the operation switch 5 is pressed, a high voltage for operation confirmation is output and the operation indicator lamp 6 is turned on. The main body 2 can be configured as a device having a weight of about 500 g.
[0024]
The high-voltage lead wire 3 and the ground wire 4 can be attached to and detached from the output terminals 10 and 11 of the main body 2. Since the high-voltage lead wire 3 and the ground wire 4 are detachable, handling during storage and carrying is easy, and repair (replacement) when the high-voltage lead wire 3 and the ground wire 4 are disconnected is easy. It has become. On the base end side of the high-voltage lead wire 3 and the ground wire 4, rod-shaped terminals that fit the output terminals 10 and 11 of the main body 2 are attached. Further, as shown in FIG. 1, a clip 3 a for connecting to the detector of the special high voltage detector is attached to the distal end side of the high voltage lead wire 3. A clip 4 a for connecting to a conductive sheet for a voltage detector checker (hereinafter referred to as “conductive sheet”) 12 serving as a ground electrode is attached to the tip end side of the ground wire 4.
[0025]
As shown in FIGS. 3 and 4, the conductive sheet 12 includes a sheet-like portion 13 made of a sheet-like material excellent in flexibility and flexibility, such as conductive rubber and conductive cloth, And a latch member provided on the sheet-like portion 13. As this latching member, for example, hook-and-loop fasteners 14a and 14b sewn in pairs on the front and back of the sheet-like portion 13 can be used.
[0026]
The conductive sheet 12 is easily wound around the outer casing 1 of the main body 2 containing the current detection element of the extra high voltage detector, wraps the outer casing 1, and the hooking member The state in which the outer casing 1 is wrapped can be maintained. The conductive sheet 12 can be easily attached to and detached from the outer casing 1 of the extra-high voltage detector.
[0027]
And when the said electroconductive sheet 12 wraps the outer housing | casing 1 of the extra high voltage detector, it makes an electric charging test by an extra high voltage detector between the electric current detection elements of this extra high voltage detector. An electrostatic capacity larger than the floating electrostatic capacity in this case is ensured.
[0028]
In order to check the operation of the special high voltage detector using this special high voltage detector checker, as shown in FIG. 5, the clip 3a of the high voltage lead wire 3 connected to one output end of the step-up transformer 9 is used. Is connected to the detector 104 of the special high voltage detector 102. In addition, the outer casing 1 of the extra high voltage detector 102 is wrapped with the conductive sheet 12, and the clip 4 a of the ground wire 4 connected to the other output end of the step-up transformer 9 is connected to the conductive sheet 12. .
[0029]
Then, the operation switch 5 is pressed to apply a high voltage sine wave to the detector 104 of the special high voltage detector 102, and a predetermined voltage is applied between the current detection element of the special high voltage detector 102 and the conductive sheet 12. With the capacitance secured, the operation of the extra high voltage detector 102 is checked.
[0030]
Thus, in a state where the operation is confirmed, as shown in the equivalent circuit shown in FIG. 6, the conductive sheet 12 is interposed between the step-up transformer 9 and the current detection element 107 of the extra high-voltage detector 102. And the large electrostatic capacitance by the housing | casing of the extra high voltage detector 102 is ensured.
[0031]
That is, in a state where the operation of the extra high voltage detector is being confirmed using the extra high voltage detector checker, the floating static electricity in the equivalent circuit during the voltage application test of the extra high voltage detector 102 shown in FIG. Instead of the capacitance 108, a large capacitance is secured. Therefore, in this special high voltage detector checker, even if the voltage applied to the detector 104 is smaller than the voltage corresponding to the ground voltage of the special high piezoelectric path, the current flowing through the detector 104 can be secured. The operation of the special high voltage detector 102 can be confirmed.
[0032]
Further, if the ratio of the floating capacitance 108 in FIG. 8 and the capacitance secured in FIG. 6 instead of this floating capacitance is n, the test voltage to be applied to the detector 104 is an extra high voltage. 1 / n of the ground voltage of the electric circuit is sufficient. That is, the operation of the extra high voltage detector can be confirmed at a voltage much lower than the ground voltage of the extra high piezoelectric path. In this special high voltage detector checker, the main body portion in which the current detection element 107 of the special high voltage detector is embedded is surrounded by a conductive sheet 12 serving as a ground electrode, whereby the floating capacitance shown in FIG. A large capacitance in place of 108 is secured.
[0033]
In this way, in the extra high voltage detector checker according to the present invention, the operation of the extra high voltage detector can be checked using the output voltage of the predetermined voltage of the commercial frequency (50 Hz to 60 Hz sine wave). In addition, since the output voltage can be lowered, the step-up transformer can be reduced in size, and the entire apparatus can be reduced in size and weight.
[0034]
【The invention's effect】
As described above, in the special high voltage detector checker and the special high voltage detector check method according to the present invention, the special high voltage detector imposes a current between the current detection element of the special high voltage detector and the conductive sheet. Applying a high voltage sine wave to the detector of the special high voltage detector in a state in which a capacitance larger than the floating capacitance in the electric test is secured, the operation of the special high voltage detector Can be checked.
[0035]
That is, in the special high voltage detector checker and the special high voltage detector check method , a predetermined capacitance is secured between the current detection element of the special high voltage detector and the conductive sheet. Even if the voltage output from the step-up transformer and applied to the detector of the special high voltage detector is lower than the ground voltage of the special high voltage circuit to be subjected to the voltage test, the voltage test is performed on this special high voltage circuit. Under the same conditions, it is possible to check the operation of the special high voltage detector.
[0036]
In addition, the voltage output from the step-up transformer may be low because the special high voltage detector checker is reduced in size and weight, is portable, and can be easily carried to the work site of the electrical test. This makes it possible to dramatically improve work safety.
[0037]
In the above special high-pressure electroscope checker, the frequency of the sine wave generated by the sine wave oscillator circuit, is the approximately equal frequency to the frequency of the target voltage for the extra high voltage electroscope performs voltage application test Therefore, for example, it is possible to satisfactorily confirm the operation of the special high voltage voltage detector that performs a voltage application test on a commercial frequency (50 Hz to 60 Hz) voltage.
[0038]
In other words, the present invention is small, lightweight, convenient to carry, can be easily carried to the work site of the electric power test, and has an extra high voltage test by using a test voltage of a commercial frequency (50 Hz to 60 Hz sine wave). It is possible to provide a special high voltage detector checker and a special high voltage detector check method capable of checking the operation of the electric appliance.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of an extra-high voltage detector checker according to the present invention.
FIG. 2 is a block diagram showing a configuration of the extra high voltage detector checker.
FIG. 3 is a plan view showing a configuration of a conductive sheet for a voltage checker used in the special high voltage voltage checker.
FIG. 4 is a side view showing the configuration of the conductive sheet for the voltage detector checker.
FIG. 5 is a plan view showing a state where the operation of the special high voltage detector is being confirmed by the special high voltage detector checker.
FIG. 6 is a circuit diagram showing an equivalent circuit in a state where the operation of the extra high voltage detector is confirmed by the extra high voltage detector checker.
FIG. 7 is a side view showing a usage state of the extra high voltage detector.
FIG. 8 is a circuit diagram showing an equivalent circuit when the extra high voltage detector is in use.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Main-body part 3 High voltage | pressure lead wire 4 Ground wire 5 Operation switch 7 Sine wave oscillation circuit 8 Amplification circuit 9 Step-up transformer 10, 11 Output terminal 12 Conductive sheet

Claims (2)

A sine wave oscillation circuit that generates a sine wave of 50 Hz or 60 Hz, which is a frequency substantially equal to 50 Hz or 60 Hz, which is the frequency of the extra high voltage to be subjected to an electric charge test by the special high voltage detector, or 55 Hz which is an intermediate value thereof When,
An amplifier circuit for amplifying the sine wave generated by the sine wave oscillation circuit;
A conductive sheet that boosts the sine wave amplified by the amplifier circuit, has one output terminal connected to the detector of the special high voltage detector, and the other output terminal that encloses the casing of the special high voltage detector And a step-up transformer connected to
The conductive sheet, Flexibility, formed by a flexible and conductive rubber or conductive fabric having conductivity, when wrapped enclosure of the special high-pressure electroscope, the special high-pressure electroscope of between current detection device, special high-pressure electroscope checker large capacitance than the stray capacitance is characterized by comprising configured to be secured between the current detection device and ground. A sine wave having a frequency substantially equal to the frequency of the special high voltage to be subjected to the electric power test by the special high voltage detector is boosted by the boost transformer,
Connect one output of the step-up transformer to the detector of the extra high voltage detector,
The other output end of the step-up transformer is connected to a conductive sheet that encloses the casing of the special high voltage detector,
In a state where a capacitance larger than the floating capacitance in the case of conducting a voltage application test with the special high voltage detector is secured between the current detection element of the special high voltage detector and the conductive sheet, A method for checking a special high voltage detector, comprising: applying the sine wave to the detector of the high voltage detector by the step-up transformer and checking the operation of the special high voltage detector.

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