CN105277778B - A method of charging high voltage electroscope and its voltage alarm - Google Patents
A method of charging high voltage electroscope and its voltage alarm Download PDFInfo
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- 238000005259 measurement Methods 0.000 claims description 100
- 238000001514 detection method Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
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Abstract
A kind of charging high voltage electroscope, comprising: insulating bar, electrical verification head, alarm and charging base；The insulating bar is in the form of a column structure, and one end of the insulating bar is hand-held part, and the other end of the insulating bar is electrical verification portion, and one end of the close hand-held part is connected with circuit board in the insulating bar；The electrical verification head is set to the electrical verification portion on the insulating bar, is connect by conducting wire with the circuit board on the electrical verification head close to the one end in the electrical verification portion, the tapered structure of the other end of the electrical verification head；The alarm is set in the insulating bar, is connect respectively with the electrical verification head and circuit board by conducting wire；The charging base is set to one end on the insulating bar close to the hand-held part, is connected and fixed with the circuit board, and the charging base is equipped with rechargeable battery.Present invention reduces production costs, improve the efficiency of management.
Description
Technical field
The present invention relates to high-voltage alternating circuit and the safety testing fields of equipment, and in particular to a kind of charging high voltage electroscope
And its method of voltage alarm.
Background technique
In electric system, for many working environments all there is many security risks, electroscope is must not in work about electric power
The tool that can lack, but the electroscope used a few days ago uses button cell, and using button cell, there are following several defects:
1, the capacity of the battery of button cell causes to occur in use because holding because of factors such as quality and service conditions
Amount deficiency cause cannot correct electrical verification and reduce working efficiency；
2, button cell in electroscope needs irregularly replacement, increases old and useless battery quantity, it is not energy-efficient not environmentally, in order to
Ensure the functional of electroscope, therefore the button cell that electroscope uses must be regularly replaced in management, is increased
Old and useless battery quantity, meanwhile, button cell causes contact tie point the reasons such as to loosen to cause to test in replacement and use process
Electric appliance is unable to normal use, at high cost；
Alarm system in traditional electroscope is mostly that alarm lamp adds alarm sound, cannot effectively be prompted detected
The voltage class of electricity.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of charging high voltage electroscope, comprising: insulating bar, electrical verification head, alarm
Device and charging base；
The insulating bar is in the form of a column structure, and one end of the insulating bar is hand-held part, and the other end of the insulating bar is to test
Electric portion, one end in the insulating bar close to the hand-held part are connected with circuit board；
Insulation rubber sleeve is equipped with outside the hand-held part of the insulating bar, the electro-insulating rubber, which is put on, is uniformly equipped with several
Salient point；
The electrical verification head is set to the electrical verification portion on the insulating bar, leads on the electrical verification head close to the one end in the electrical verification portion
It crosses conducting wire to connect with the circuit board, the tapered structure of the other end of the electrical verification head；
The alarm is set in the insulating bar, is connect respectively with the electrical verification head and circuit board by conducting wire；
The insulating bar is equipped with indicator light, and the indicator light is connect by conducting wire with the alarm；
The charging base is set to one end on the insulating bar close to the hand-held part, connect with the circuit board solid
Fixed, the charging base is equipped with rechargeable battery and battery cover, and the rechargeable battery is set in the charging base, the battery
It is covered on the opening of the charging base, the battery cover and the battery pedestal are fixed.
Further, one end on the insulating bar close to the hand-held part is equipped with rectangular recess, and the charging base is set
In in the rectangular recess.
Further, the alarm is voltage alarms based on pattern recognition, is equipped with detection module, the detection module in the alarm
For measuring the rank of voltage,
When surveyed voltage is higher than the 105% of the high end value of predeterminated voltage, then the first alarm is issued；
When surveyed voltage is lower than the 95% of predeterminated voltage low side value, then the second alarm is issued；
When surveyed voltage predeterminated voltage low side value 105% to high end value 95% between when, then issue third alarm；
When surveyed voltage the high end value of predeterminated voltage 95% to high end value 105% between when, provide need to carry out repeatedly
4th alarm of measurement, the frequency n repeatedly measured are greater than equal to 3,
If the variance of n times measurement is less than the 3% of the high end value of predeterminated voltage, it is higher than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the first alarm when the high end value of voltage, third is provided in the arithmetic mean of instantaneous value of n times measurement end value high lower than predeterminated voltage
Alarm；
If the variance of n times measurement is more than or equal to the 3% of the high end value of predeterminated voltage, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of the high end value of predeterminated voltage or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
High end value be compared, the first alarm is provided when the arithmetic mean of instantaneous value that m-2 times measures is higher than the high end value of predeterminated voltage, in m-
Third alarm is provided when the arithmetic mean of instantaneous values of 2 measurements are lower than predeterminated voltage high end value；
When surveyed voltage predeterminated voltage low side value 95% to low side value 105% between when, provide need to carry out repeatedly
4th alarm of measurement, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of predeterminated voltage low side value, it is lower than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the second alarm when voltage low side value, third is provided when the arithmetic mean of instantaneous value of n times measurement is higher than predeterminated voltage low side value
Alarm；
If the variance of n times measurement is more than or equal to the 3% of predeterminated voltage low side value, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of predeterminated voltage low side value or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
Low side value be compared, m-2 times measure arithmetic mean of instantaneous value be lower than predeterminated voltage low side value when provide the second alarm, in m-
The arithmetic mean of instantaneous value of 2 measurements provides third alarm when being higher than predeterminated voltage low side value.
Further, the maximum pendulous frequency is 7 times.
Further, insulation rubber sleeve is set outside the hand-held part of the insulating bar, the electro-insulating rubber, which is put on, uniformly to be set
There are several salient points
Further, the charging base is equipped with battery cover, and the battery cover and the battery pedestal are fixed.
A kind of method of voltage alarm is provided characterized by comprising
1) the charging high voltage electroscope such as any one of claim 1-7 is provided；
2) Devices to test is measured using electrical verification head；
I) when surveyed voltage is higher than the 105% of the high end value of predeterminated voltage, then the first alarm is issued；
Ii) when surveyed voltage is lower than the 95% of predeterminated voltage low side value, then the second alarm is issued；
Iii) when surveyed voltage predeterminated voltage low side value 105% to high end value 95% between when, then issue third
Alarm；
Iv) when surveyed voltage the high end value of predeterminated voltage 95% to high end value 105% between when, provide need to carry out it is more
4th alarm of secondary measurement, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of the high end value of predeterminated voltage, it is higher than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the first alarm when the high end value of voltage, third is provided in the arithmetic mean of instantaneous value of n times measurement end value high lower than predeterminated voltage
Alarm；
If the variance of n times measurement is more than or equal to the 3% of the high end value of predeterminated voltage, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of the high end value of predeterminated voltage or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
High end value be compared, the first alarm is provided when the arithmetic mean of instantaneous value that m-2 times measures is higher than the high end value of predeterminated voltage, in m-
Third alarm is provided when the arithmetic mean of instantaneous values of 2 measurements are lower than predeterminated voltage high end value；
V) when surveyed voltage predeterminated voltage low side value 95% to low side value 105% between when, provide need to carry out it is more
4th alarm of secondary measurement, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of predeterminated voltage low side value, it is lower than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the second alarm when voltage low side value, third is provided when the arithmetic mean of instantaneous value of n times measurement is higher than predeterminated voltage low side value
Alarm；
If the variance of n times measurement is more than or equal to the 3% of predeterminated voltage low side value, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of predeterminated voltage low side value or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
Low side value be compared, m-2 times measure arithmetic mean of instantaneous value be lower than predeterminated voltage low side value when provide the second alarm, in m-
The arithmetic mean of instantaneous value of 2 measurements provides third alarm when being higher than predeterminated voltage low side value.
Further, the maximum pendulous frequency is 7 times.
A kind of New charger high voltage electroscope provided by the invention effectively prevents electrical verification by installing rechargeable battery additional
Device effectively prevents in use because the undesirable failure of circuit connection causes to replace because of the generation of battery capacity deficiency
It the occurrence of detection delay, extends the service life of electroscope while reducing production cost, and improve electroscope
Safety management.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of charging high voltage electroscope in the present invention.
Specific embodiment
The exemplary embodiments for embodying feature of present invention and advantage will describe in detail in the following description.It should be understood that this
Invention can have various variations in different embodiments, neither depart from the scope of the present invention, and it is therein explanation and
Diagram inherently is illustrated as being used, rather than to limit the present invention.
As shown in Figure 1, providing a kind of charging high voltage electroscope, comprising: insulating bar 1, electrical verification head 2, alarm 3 and charging
Pedestal 4；
Insulating bar 1 is in the form of a column structure, and one end of insulating bar 1 is hand-held part, and the other end of insulating bar 1 is electrical verification portion, insulation
One end in bar 1 close to hand-held part is equipped with circuit board 5；
Electrical verification head 2 is set to the electrical verification portion on insulating bar 1, and the one end in close electrical verification portion passes through conducting wire and circuit on electrical verification head 2
Plate 5 connects, the tapered structure of the other end of electrical verification head 2；
Alarm 3 is set in insulating bar, is connect respectively with electrical verification head 2 and circuit board 5 by conducting wire；
One end on insulating bar 1 close to hand-held part is equipped with rectangular recess, and charging base 4 is set in rectangular recess, with circuit
Plate 5 is connected and fixed；
Charging base 4 is equipped with the rechargeable battery 6 and battery cover of two sections (36mAh), and rechargeable battery 6 is located at charging base 4
Interior, battery cover and charging base are fixed by the opening that battery cover is set to charging base 4 after being put into rechargeable battery 6.Have
Battery capacity can normally meet work requirements to the electroscope that ensured of effect during operation.The design makes electroscope have volume
Small, easy to carry advantage.
Further, insulating bar 1 is equipped with indicator light 7, and indicator light 7 passes through conducting wire and alarm close to 2 one end of electrical verification head
3 connections.
In the present embodiment, which is voltage alarms based on pattern recognition, is equipped with detection module in alarm 3, detection module is used for
The rank of voltage is measured,
When surveyed voltage is higher than the 105% of the high end value of predeterminated voltage, then the first alarm is issued；
When surveyed voltage is lower than the 95% of predeterminated voltage low side value, then the second alarm is issued；
When surveyed voltage predeterminated voltage low side value 105% to high end value 95% between when, then issue third alarm；
When surveyed voltage the high end value of predeterminated voltage 95% to high end value 105% between when, provide need to carry out repeatedly
4th alarm of measurement, the frequency n repeatedly measured are greater than equal to 3,
If the variance of n times measurement is less than the 3% of the high end value of predeterminated voltage, it is higher than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the first alarm when the high end value of voltage, third is provided in the arithmetic mean of instantaneous value of n times measurement end value high lower than predeterminated voltage
Alarm；
If the variance of n times measurement is more than or equal to the 3% of the high end value of predeterminated voltage, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of the high end value of predeterminated voltage or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
High end value be compared, the first alarm is provided when the arithmetic mean of instantaneous value that m-2 times measures is higher than the high end value of predeterminated voltage, in m-
Third alarm is provided when the arithmetic mean of instantaneous values of 2 measurements are lower than predeterminated voltage high end value；
When surveyed voltage predeterminated voltage low side value 95% to low side value 105% between when, provide need to carry out repeatedly
4th alarm of measurement, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of predeterminated voltage low side value, it is lower than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the second alarm when voltage low side value, third is provided when the arithmetic mean of instantaneous value of n times measurement is higher than predeterminated voltage low side value
Alarm；
If the variance of n times measurement is more than or equal to the 3% of predeterminated voltage low side value, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of predeterminated voltage low side value or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
Low side value be compared, m-2 times measure arithmetic mean of instantaneous value be lower than predeterminated voltage low side value when provide the second alarm, in m-
The arithmetic mean of instantaneous value of 2 measurements provides third alarm when being higher than predeterminated voltage low side value.
In the present embodiment, maximum pendulous frequency is 7 times.
Insulation rubber sleeve 8 is set outside the hand-held part of insulating bar 1, is uniformly equipped with several salient points on insulation rubber sleeve 8.
The frictional force between hand and electroscope is increased, staff is facilitated to use.
Charger high voltage electroscope provided by the invention effectively prevents electroscope because of circuit by installing rechargeable battery additional
The failure of bad connection causes to replace, while effectively preventing the detection delay generated in use by battery capacity deficiency
The occurrence of, it extends the service life of electroscope while reducing production cost, and improve the safety management of electroscope.
Another embodiment in the present embodiment, provides a kind of method of voltage alarm, comprising:
1) the charging high voltage electroscope such as any one of claim 1-7 is provided；
2) Devices to test is measured using electrical verification head；
I) when surveyed voltage is higher than the 105% of the high end value of predeterminated voltage, then the first alarm is issued；
Ii) when surveyed voltage is lower than the 95% of predeterminated voltage low side value, then the second alarm is issued；
Iii) when surveyed voltage predeterminated voltage low side value 105% to high end value 95% between when, then issue third
Alarm；
Iv) when surveyed voltage the high end value of predeterminated voltage 95% to high end value 105% between when, provide need to carry out it is more
4th alarm of secondary measurement, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of the high end value of predeterminated voltage, it is higher than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the first alarm when the high end value of voltage, third is provided in the arithmetic mean of instantaneous value of n times measurement end value high lower than predeterminated voltage
Alarm；
If the variance of n times measurement is more than or equal to the 3% of the high end value of predeterminated voltage, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of the high end value of predeterminated voltage or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
High end value be compared, the first alarm is provided when the arithmetic mean of instantaneous value that m-2 times measures is higher than the high end value of predeterminated voltage, in m-
Third alarm is provided when the arithmetic mean of instantaneous values of 2 measurements are lower than predeterminated voltage high end value；
V) when surveyed voltage predeterminated voltage low side value 95% to low side value 105% between when, provide need to carry out it is more
4th alarm of secondary measurement, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of predeterminated voltage low side value, it is lower than in the arithmetic mean of instantaneous value of n times measurement pre-
If providing the second alarm when voltage low side value, third is provided when the arithmetic mean of instantaneous value of n times measurement is higher than predeterminated voltage low side value
Alarm；
If the variance of n times measurement is more than or equal to the 3% of predeterminated voltage low side value, (n+1)th measurement is carried out, and repeat
Variance is calculated, until when variance is less than the 3% of predeterminated voltage low side value or reaches maximum pendulous frequency, by measurement time at this time
Number scale makees m, and the arithmetic average and predeterminated voltage of m-2 measurement after removing peak and minimum in numerical value are measured with m times
Low side value be compared, m-2 times measure arithmetic mean of instantaneous value be lower than predeterminated voltage low side value when provide the second alarm, in m-
The arithmetic mean of instantaneous value of 2 measurements provides third alarm when being higher than predeterminated voltage low side value.
In the present embodiment, maximum pendulous frequency is 7 times.
It can be apparent from the voltage class of Devices to test by voltage alarms based on pattern recognition, be effectively prevented the thing of personal safety
Therefore occur.
Embodiment above describes the present invention, it should be understood that term used is explanation and exemplary, and not restrictive
Term.Due to spirit or essence that the present invention can be embodied in a variety of forms without departing from invention, it should therefore be appreciated that on
It states embodiment to be not limited to any of the foregoing details, and should widely solve within the spirit and scope of the appended claims
The whole change and modification released, therefore fallen into claim or its equivalent scope all should be appended claims and be covered.
Claims (4)
1. a kind of charging high voltage electroscope, comprising: insulating bar, electrical verification head, alarm and charging base；
The insulating bar is in the form of a column structure, and one end of the insulating bar is hand-held part, and the other end of the insulating bar is electrical verification portion,
One end in the insulating bar close to the hand-held part is connected with circuit board；
Insulation rubber sleeve is equipped with outside the hand-held part of the insulating bar, the electro-insulating rubber puts on uniformly convex equipped with several
Point；
The electrical verification head is set to the electrical verification portion on the insulating bar, passes through on the electrical verification head close to the one end in the electrical verification portion and leads
Line is connect with the circuit board, the tapered structure of the other end of the electrical verification head；
The alarm is set in the insulating bar, is connect respectively with the electrical verification head and circuit board by conducting wire；
The insulating bar is equipped with indicator light, and the indicator light is connect by conducting wire with the alarm；
The charging base is set to one end on the insulating bar close to the hand-held part, is connected and fixed with the circuit board, institute
Charging base is stated equipped with rechargeable battery and battery cover, the rechargeable battery is set in the charging base, and the battery cover is set
In the opening of the charging base, the battery cover and the battery pedestal are fixed；
The alarm is voltage alarms based on pattern recognition, detection module is equipped in the alarm, the detection module is for measuring voltage
Rank,
When surveyed voltage is higher than the 105% of the high end value of predeterminated voltage, then the first alarm is issued；
When surveyed voltage is lower than the 95% of predeterminated voltage low side value, then the second alarm is issued；
When surveyed voltage predeterminated voltage low side value 105% to high end value 95% between when, then issue third alarm；
When surveyed voltage the high end value of predeterminated voltage 95% to high end value 105% between when, providing need to take multiple measurements
The 4th alarm, the frequency n repeatedly measured is greater than equal to 3,
If the variance of n times measurement is less than the 3% of the high end value of predeterminated voltage, it is higher than default electricity in the arithmetic mean of instantaneous value of n times measurement
The first alarm is provided when pressing high end value, provides third alarm in the arithmetic mean of instantaneous value of n times measurement end value high lower than predeterminated voltage；
If the variance of n times measurement is more than or equal to the 3% of the high end value of predeterminated voltage, (n+1)th measurement is carried out, and compute repeatedly
Variance, until remembering pendulous frequency at this time when variance is less than the 3% of the high end value of predeterminated voltage or reaches maximum pendulous frequency
Make m, the arithmetic average of m-2 measurement after removing peak and minimum in numerical value and the height of predeterminated voltage are measured with m times
End value is compared, and the first alarm is provided in the arithmetic mean of instantaneous value that m-2 times measures end value high higher than predeterminated voltage, at m-2 times
Third alarm is provided when the arithmetic mean of instantaneous value of measurement is lower than predeterminated voltage high end value；
When surveyed voltage predeterminated voltage low side value 95% to low side value 105% between when, providing need to take multiple measurements
The 4th alarm, the frequency n repeatedly measured is greater than equal to 3；
If the variance of n times measurement is less than the 3% of predeterminated voltage low side value, it is lower than default electricity in the arithmetic mean of instantaneous value of n times measurement
The second alarm is provided when forcing down end value, provides third alarm when the arithmetic mean of instantaneous value of n times measurement is higher than predeterminated voltage low side value；
If the variance of n times measurement is more than or equal to the 3% of predeterminated voltage low side value, (n+1)th measurement is carried out, and compute repeatedly
Variance, until remembering pendulous frequency at this time when variance is less than the 3% of predeterminated voltage low side value or reaches maximum pendulous frequency
Make m, the m-2 arithmetic average measured being measured after removing peak and minimum in numerical value with m times and predeterminated voltage it is low
End value is compared, and the second alarm is provided when the arithmetic mean of instantaneous value that m-2 times measures is lower than predeterminated voltage low side value, at m-2 times
The arithmetic mean of instantaneous value of measurement provides third alarm when being higher than predeterminated voltage low side value.
2. charging high voltage electroscope as described in claim 1, which is characterized in that close to the hand-held part on the insulating bar
One end is equipped with rectangular recess, and the charging base is set in the rectangular recess.
3. charging high voltage electroscope as described in claim 1, which is characterized in that the maximum pendulous frequency is 7 times.
4. a kind of method of voltage alarm characterized by comprising
1) the charging high voltage electroscope such as any one of claim 1-3 is provided；
2) Devices to test is measured using electrical verification head；
I) when surveyed voltage is higher than the 105% of the high end value of predeterminated voltage, then the first alarm is issued；
Ii) when surveyed voltage is lower than the 95% of predeterminated voltage low side value, then the second alarm is issued；
Iii) when surveyed voltage predeterminated voltage low side value 105% to high end value 95% between when, then issue third alarm；
Iv) when surveyed voltage the high end value of predeterminated voltage 95% to high end value 105% between when, providing repeatedly to be surveyed
4th alarm of amount, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of the high end value of predeterminated voltage, it is higher than default electricity in the arithmetic mean of instantaneous value of n times measurement
The first alarm is provided when pressing high end value, provides third alarm in the arithmetic mean of instantaneous value of n times measurement end value high lower than predeterminated voltage；
If the variance of n times measurement is more than or equal to the 3% of the high end value of predeterminated voltage, (n+1)th measurement is carried out, and compute repeatedly
Variance, until remembering pendulous frequency at this time when variance is less than the 3% of the high end value of predeterminated voltage or reaches maximum pendulous frequency
Make m, the arithmetic average of m-2 measurement after removing peak and minimum in numerical value and the height of predeterminated voltage are measured with m times
End value is compared, and the first alarm is provided in the arithmetic mean of instantaneous value that m-2 times measures end value high higher than predeterminated voltage, at m-2 times
Third alarm is provided when the arithmetic mean of instantaneous value of measurement is lower than predeterminated voltage high end value；
V) when surveyed voltage predeterminated voltage low side value 95% to low side value 105% between when, providing repeatedly to be surveyed
4th alarm of amount, the frequency n repeatedly measured are greater than equal to 3；
If the variance of n times measurement is less than the 3% of predeterminated voltage low side value, it is lower than default electricity in the arithmetic mean of instantaneous value of n times measurement
The second alarm is provided when forcing down end value, provides third alarm when the arithmetic mean of instantaneous value of n times measurement is higher than predeterminated voltage low side value；
If the variance of n times measurement is more than or equal to the 3% of predeterminated voltage low side value, (n+1)th measurement is carried out, and compute repeatedly
Variance, until remembering pendulous frequency at this time when variance is less than the 3% of predeterminated voltage low side value or reaches maximum pendulous frequency
Make m, the m-2 arithmetic average measured being measured after removing peak and minimum in numerical value with m times and predeterminated voltage it is low
End value is compared, and the second alarm is provided when the arithmetic mean of instantaneous value that m-2 times measures is lower than predeterminated voltage low side value, at m-2 times
The arithmetic mean of instantaneous value of measurement provides third alarm when being higher than predeterminated voltage low side value.
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| CN204595068U (en) * | 2015-05-28 | 2015-08-26 | 国家电网公司 | Photovoltaic charged formula high voltage electroscope |
| CN204595085U (en) * | 2015-05-21 | 2015-08-26 | 刘斌 | A kind of syllogic digital display electroscope |
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| CN204424480U (en) * | 2014-07-20 | 2015-06-24 | 国家电网公司 | Carry the temporary ground wire bar of warning device |
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