KR20170022491A - Portable SPD diagnostic device - Google Patents

Portable SPD diagnostic device Download PDF

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Publication number
KR20170022491A
KR20170022491A KR1020150117555A KR20150117555A KR20170022491A KR 20170022491 A KR20170022491 A KR 20170022491A KR 1020150117555 A KR1020150117555 A KR 1020150117555A KR 20150117555 A KR20150117555 A KR 20150117555A KR 20170022491 A KR20170022491 A KR 20170022491A
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South Korea
Prior art keywords
surge
surge protector
protector
wire
microprocessor
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KR1020150117555A
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Korean (ko)
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KR101770821B1 (en
Inventor
길경석
박대원
서재석
이정윤
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이엠아이테크 (주)
한국해양대학교 산학협력단
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Priority to KR1020150117555A priority Critical patent/KR101770821B1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1236—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of surge arresters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
    • G01R31/024—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable surge protector diagnosing apparatus that is easy to install and measure, and a surge protector (SPD: Surge Protective Device) is applied. When the surge protector is clamped by a surge protector A surge applying and measuring unit for measuring the clamped voltage value at a microprocessor (MPU) to detect a deterioration state of the surge protector; and a surge outputting unit for applying surge output from the surge applying and measuring unit to the surge protector, A coupling unit for preventing an external power source connected to the protector from being transmitted to the surge applying and measuring unit to stably diagnose a deterioration state of the surge protector while external power is applied to the surge protector; The HVDC module is selectively connected to the surge acceptance and measurement unit via the selection switch to supply a high voltage for surge application A reference voltage detector for detecting a reference voltage of the surge protector by applying a high voltage to the surge protector and electrically connecting the HVDC module to the surge protector and transmitting the detected reference voltage to the microprocessor, A selection switch for selectively connecting the HVDC module of the detection unit to the surge applying and measuring unit or electrically connected to the surge protector, a detection circuit for detecting a leakage current value flowing through the surge protector, A leakage current detector for detecting a deterioration state of the surge protector, and a controller for outputting a clamped voltage value and a leakage current value transmitted from the microprocessor as an image to induce a user to easily diagnose a deterioration state of the surge protector And a video output unit,
The surge protector generates a surge through the surge detection and measurement section, measures the clamped voltage value, and detects the leakage current flowing to the surge protector through the leakage current detector to diagnose the deterioration state of the surge protector. In addition to the excellent reliability of the diagnosis, the high frequency surge is applied to the surge protector through the coupling unit, but the power supply (system) applied to the surge protector is prevented, so that the power system is connected to the surge protector. Deterioration state diagnosis can be performed, and the versatility of the apparatus can be ensured.
In addition, since the surge protector can be diagnosed to be deteriorated in a state where the surge protector is connected to the power system, the device can be easily moved to a place where the surge protector is installed. There is an effect that can be secured.
If a surge protector abnormality is diagnosed through the surge detection and measurement unit and the leakage current detector, the reference voltage of the surge protector is detected through the reference voltage detector after the surge protector is recovered, and the degradation progress state of the surge protector is detected In addition, not only can the reliability of diagnosis of the deterioration state of the surge protector be improved, but also the manager can clearly determine the replacement and replacement timing of the surge protector based on the diagnostic information with excellent reliability, Thereby effectively preventing a safety accident caused by the accident.

Description

[0001] Portable SPD diagnostic device for easy installation and measurement [0002]

More particularly, the present invention relates to a portable surge protector diagnosing apparatus which is easy to install and measure, and more particularly, to a surge protector diagnosing apparatus which generates a surge through a surge applying and measuring unit and applies a surge protector to measure a clamped voltage value, The surge protector is diagnosed to be in a deteriorated state by detecting the leakage current flowing through the surge protector, so that the diagnosis of the surge protector is highly reliable and the high frequency surge is applied to the surge protector through the coupling unit. Which can prevent the intrusion of the power source (system) and detect the deterioration state of the surge protector while the power supply system is connected to the surge protector. Therefore, the portable surge protector diagnostic device .

In general, Surge Protective Devices (SPDs) are widely applied to protect equipment from overvoltages and surges caused by lightning.

The early surge protector in Korea was manufactured according to the technical specification of the end user rather than the technology development according to IEC or KS standards. By the end of 2000, the surge protector was not considered safety due to overheating competition between surge capacity .

For example, there are 10 products connected in parallel with 20 single components, which have not been subjected to performance evaluation with 200 products.

Moreover, since 2009, Chinese surge protectors have been imported in large quantities, and the quality of surge protectors has been deteriorating due to the rapid import of low cost products of OEMs.

Therefore, in order to prevent the safety accidents caused by the surge protector which has lost the function of the surge protector due to the defective product, aging, etc., it is necessary to periodically perform the diagnosis of the deterioration condition of the surge protector do.

However, the conventional surge protector diagnosis apparatus has a problem that the reliability of diagnosis of the surge protector is somewhat low by detecting only the reference voltage of the surge protector and diagnosing the deterioration state of the surge protector based on the detection information.

In addition, in the conventional surge protector diagnosis apparatus, if the surge protector diagnoses the power system with the power applied thereto, the power applied to the surge protector may penetrate into the diagnosis apparatus and cause a failure of the diagnosis apparatus. The deterioration state of the surge protector can be diagnosed after the surge protector is separately recovered from the power system or the power system. Therefore, the diagnosis is very inconvenient and the generality of use of the apparatus is somewhat low due to inconvenience of use.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve all of the above problems, and it is an object of the present invention to provide a surge protector which generates a surge through a surge applying unit and a measuring unit, measures a clamped voltage value, The diagnosis of the deterioration state of the surge protector is detected by detecting the leakage current flowing to the protector, so that the reliability of diagnosis of the surge protector is excellent. In addition, the high frequency surge is applied to the surge protector through the coupling unit, (System) is prevented, and the diagnosis of the deterioration state of the surge protector can be performed in a state where the power supply system is connected to the surge protector, thereby providing a portable surge protector diagnostic device that can be installed and measured easily .

In addition, since the surge protector can be diagnosed to be deteriorated in a state where the surge protector is connected to the power system, the device can be easily moved to a place where the surge protector is installed. And a portable surge protector diagnostic device that can be installed and measured easily.

If a surge protector abnormality is diagnosed through the surge detection and measurement unit and the leakage current detector, the reference voltage of the surge protector is detected through the reference voltage detector after the surge protector is recovered, and the degradation progress state of the surge protector is detected In addition, not only can the reliability of diagnosis of the deterioration state of the surge protector be improved, but also the manager can clearly determine the replacement and replacement timing of the surge protector based on the diagnostic information with excellent reliability, And to provide a portable surge protector diagnostic device that can be easily installed and measured to more effectively prevent a safety accident caused by the surge protector.

According to another aspect of the present invention, there is provided a portable surge protector diagnosing apparatus which is easy to install and measure according to the present invention. The surge protector applies a surge to the surge protector and clamps the applied surge with a surge protector. A surge applying and measuring unit for measuring the clamped voltage value at a microprocessor (MPU) to detect a deterioration state of the surge protector; and a surge outputting unit for applying a surge output from the surge applying and measuring unit to the surge protector A coupling unit for interrupting transmission of an external power source connected to the surge protector to the surge applying and measuring unit to stably diagnose a deterioration state of the surge protector while external power is applied to the surge protector, The HVDC module outputting the high voltage is selectively connected to the surge applying unit and the measuring unit through the selection switch, A reference voltage detector for detecting a reference voltage of the surge protector by supplying a high voltage or by applying a high voltage to the surge protector, the HVDC module being electrically connected to the surge protector and transmitting the detected reference voltage to the microprocessor; A selection switch for selectively connecting the HVDC module of the reference voltage detecting unit to the surge applying and measuring unit or electrically connected to the surge protector, a detection circuit for detecting a leakage current value flowing through the surge protector, A leakage current detector for detecting a deterioration state of the surge protector by transmitting the clamped voltage value and the leakage current value transmitted from the microprocessor to an image to easily diagnose a deterioration state of the surge protector; And a video output unit It is gong.

The surge applying and measuring unit may include a surge generator for generating a surge under the control of the microprocessor, one end electrically connected to the surge generator, and the other end for applying a surge generated at the surge generator, An output wire having an input terminal to which an input terminal is formed, an output terminal connected to the microprocessor at one end, and an output terminal through which a surge applied by a surge protector is clamped and output via a surge protector; And a microprocessor for controlling operation of the apparatus and calculating a voltage value transmitted through the output wire,

If it is required to diagnose the deterioration state of the surge protector through the surge application and measurement unit,

A surge protector is connected to an input terminal of the input wire by a connection wire and a surge is generated through the surge generator in a state where an output terminal of the output wire is connected to a connection wire by another connection wire, A surge is applied to the surge protector through a connection wire connected to the input wire, the applied surge is clamped by the surge protector and is transmitted to the output wire through a connection wire connected to the output wire, The voltage value clamped by the microprocessor is output through the image output unit so that the user can easily diagnose the deterioration state of the surge protector,

At this time, the HVDC module of the reference voltage detector is connected to the surge generator by the selection switch to provide a high voltage for generating a surge in the surge generator.

The coupling unit may include an impedance formed on the input wire and a capacitor formed on the input wire,

A surge generated in the surge generator is prevented from being transmitted to the surge applying part and the measurement part due to the low frequency of 220 V (60 Hz) of the power system connected to the surge protector, 50 μs or 8/20 μs, and is applied to the surge protector through the capacitor, it is possible to diagnose the deterioration state of the surge protector stably in a state where external power is applied to the surge protector, And the portability of the apparatus can be ensured due to the characteristic that the deterioration state of the surge protector in the installed state can be simply diagnosed.

The leakage current detector includes a clamp-type video current transformer for detecting a leakage current flowing through the surge protector, and a detection circuit for electrically connecting the video current transformer and the microprocessor to transmit the detected value of the video current transformer to the microprocessor. And a high-sensitivity low-noise amplifier (LNA) formed on the detection wire for amplifying a signal detected and transmitted by the video current transformer,

If the deterioration state diagnosis of the surge protector is requested through the leakage current detector,

A method of detecting a leakage current on a measurement wire which flows in the same way as a surge protector through the image deflector after forming a measurement wire electrically connected to a surge protector to detect a leakage current of the surge protector, And transmits the detected value to the microprocessor through a wire to induce a detected value to be output through the image output unit, thereby easily diagnosing the deterioration state of the surge protector.

In addition, the reference voltage detector diagnoses the deterioration state of the surge protector using the high voltage for diagnosis of the surge protector after the diagnosis of the surge protector through the surge applying and measuring unit and the leakage current detector,

Wherein the reference voltage detecting unit comprises a HVDC module for generating a high voltage to be applied to a surge protector and a linear control circuit for controlling an output voltage of the HVDC module through the control of the microprocessor,

The leakage current flowing from the HVDC module to the surge protector through the leakage current detector is measured while gradually increasing the voltage applied to the surge protector through the control of the linear control circuit, Is detected.

As described above, according to the portable surge protector diagnosing apparatus according to the present invention, a surge is generated through a surge applying unit and a measurement unit, and is applied to a surge protector to measure a clamped voltage value. The surge protector is diagnosed to be in a deteriorated state by detecting the leakage current flowing through the surge protector, so that the diagnosis of the surge protector is highly reliable and the high frequency surge is applied to the surge protector through the coupling unit. It is possible to prevent the intrusion of the power source (system) and to diagnose the deterioration state of the surge protector while the power system is connected to the surge protector.

In addition, since the surge protector can be diagnosed to be deteriorated in a state where the surge protector is connected to the power system, the device can be easily moved to a place where the surge protector is installed. There is an effect that can be secured.

If a surge protector abnormality is diagnosed through the surge detection and measurement unit and the leakage current detector, the reference voltage of the surge protector is detected through the reference voltage detector after the surge protector is recovered, and the degradation progress state of the surge protector is detected In addition, not only can the reliability of diagnosis of the deterioration state of the surge protector be improved, but also the manager can clearly determine the replacement and replacement timing of the surge protector based on the diagnostic information with excellent reliability, Thereby effectively preventing a safety accident caused by the accident.

FIG. 1 is a conceptual diagram of a portable surge protector diagnostic apparatus which is easy to install and measure according to an embodiment of the present invention.
Fig. 2 is a conceptual view of the coupling unit of the portable surge protector diagnostic apparatus, which is easy to install and measure,
3 is a view for explaining a portable surge protector diagnostic apparatus shown in Fig. 1 that is easy to install and measure;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable surge protector diagnostic apparatus which is easy to install and measure according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Detailed descriptions of well-known functions and constructions that may be unnecessarily obscured by the gist of the present invention will be omitted.

1 to 3 illustrate a portable surge protector diagnostic apparatus that can be easily installed and measured according to an embodiment of the present invention. FIG. 1 is a block diagram of a portable surge protector diagnostic apparatus in accordance with an embodiment of the present invention. Fig. 2 is a conceptual view of the coupling unit of the portable surge protector diagnostic apparatus, which is easy to install and measure as shown in Fig. 1, Fig. 3 is a schematic diagram of a portable surge protector diagnostic apparatus Respectively. As shown in Fig.

As shown in the figure, the portable surge protector diagnostic apparatus 100, which is easy to install and measure according to the embodiment of the present invention, includes a surge applying and measuring unit 10, a coupling unit 20, A detection switch 30, a selection switch 40, a leakage current detection unit 50, and a video output unit 60.

1, the surge applying and measuring unit 10 applies a surge to a surge protector (SPD) 1, and the surge applied thereto is clamped by a surge protector 1 ), The microprocessor 14 (MPU) measures the clamped voltage value to detect the deterioration state of the surge protector 1,

A surge generator 11 for generating a surge under the control of the microprocessor 14 and a surge generator 11 electrically connected at one end to the surge generator 11 and at the other end to a surge generated at the surge generator 11. [ A surge protector 1 connected at one end to the microprocessor 14 and at the other end to a surge protector 1 has a surge protector 1 connected to the input wire 12, An output wire 13 formed with an output terminal 13a through which a voltage to be clamped and outputted is transmitted and a control unit controlling the operation of the surge generator 11 and calculating a voltage value transmitted through the output wire 13 And a microprocessor (14) for executing the program.

That is, if the deterioration state diagnosis of the surge protector 1 is requested through the surge applying and measuring unit 10 as shown in FIG. 3A,

The input terminal 12a of the input wire 12 and the surge protector 1 are connected to each other by a connecting wire and the output terminal 13 of the output wire 13 and the connecting wire 2 are connected to another connecting wire 2 When a surge is generated through the surge generator 11 and a surge is applied to the input wire 12, a surge is applied to the surge protector through a connection wire 2 connected to the input wire 12, And the applied surge is clamped by the surge protector 1 and transmitted to the output wire 13 through the connection wire 2 connected to the output wire 13 to be connected to the microprocessor 14, the voltage value clamped by the microprocessor 14 is output through the image output unit 60, so that the user can easily diagnose the deterioration state of the surge protector 1. [

When a surge is applied to the surge protector 1 connected to the 220V power system through the surge applying and measuring unit 10, the surge protector 1 performing the normal operation may generate 480 It can be confirmed that the voltage is clamped to 500V.

If the surge protector 1 deteriorates and normal operation can not be performed, the voltage to be clamped is decreased or increased. Thus, the replacement or replacement timing of the surge protector can be easily determined according to the measured voltage measurement value.

[Figure 1] Measurement waveform of clamped voltage

Figure pat00001

Here, the HVDC module 31 of the reference voltage detector 30 to be hounded is connected to the surge generator 11 by the selection switch 40 to be surmounted to generate a surge in the surge generator 11 To provide a high voltage.

Since the penetration of the power source due to the external power system connected to the surge protector 1 is stably cut through the coupling unit 20 to be installed, the surge protector 1 is connected to the surge protector 1 via the surge- The clamping voltage of the clamping unit 1 can be stably detected.

1 and 2, the surge output from the surge applying and measuring unit 10 is applied to the surge protector 1, and the surge protector 1 is connected to the coupling unit 20, The power of the external power system is prevented from being transmitted to the surge applying and measuring unit 10 so that the deterioration state of the surge protector 1 can be stably diagnosed in a state where external power is applied to the surge protector 1 However,

And an impedance 21 formed on the input wire 12 and a capacitor 22 formed on the input wire 21. The impedance

That is, when the surge protector 1 (AC power is applied) is electrically connected to the surge protector 1 in operation to apply a surge, the AC power may be applied to the surge generator 11 to destroy the apparatus. The coupling unit 20, which is not applied to the surge generator 11 side and induces only the surge generated for diagnosing the surge protector 1 to be applied to the surge protector 1 in operation, Figure 2].

[Figure 2] Connection diagram of surge generator, coupling unit and surge protector

Figure pat00002

Here, the coupling unit 20 is composed of a capacitor C and an impedance Z.

The capacitive reactance (X C ) of the capacitor C,

Figure pat00003
Lt;

The lower the frequency, the larger the reactance, and the higher the frequency, the smaller the reactance.

The impedance Z is the resistance R and the inductor L, and the inductive reactance (X L )

Figure pat00004
Lt;

When the frequency is low, the reactance is small, and when the frequency is high, the reactance is large.

Therefore, with respect to the AC power supply voltage of 60 Hz, the coupling unit 20 is configured as shown in [Figure 3], and the AC power supply voltage is cut off and not applied to the diagnosis apparatus side.

[Figure 3] Operation of coupling unit to AC power of power system applied to surge protector

Figure pat00005

However, for a surge having a high frequency component of several tens of kHz, the coupling unit applies a surge to the surge protector side as in the following [4].

[Figure 4] Operation of coupling unit with surge generated by surge generator

Figure pat00006

Therefore, the AC power source of the power system connected to the surge protector 1 is cut off by the coupling unit 20 at a low frequency (typically 220 V to 60 Hz) and is not transmitted to the surge applying and measuring unit 10, The surge generated in the surge generator 11 is transmitted to the surge protector 1 through the coupling unit 20 with a high frequency component of 1.2 / 50 占 퐏 or 8 / It is possible to stably diagnose the deterioration state of the surge protector 1 in a state in which external power is applied to the surge protector 1, thereby ensuring ease of use of the apparatus, and at the same time, So that the portability of the apparatus can be easily ensured due to the characteristic that the status can be simply diagnosed.

1, the reference voltage detector 30 detects a surge protector 1 (hereinafter referred to as a surge protector) 1 after diagnosis of the surge protector 1 through the surge applying and measuring unit 10 and the leakage current detector 50 And a reference voltage detector 30 for diagnosing the deterioration state of the surge protector 1 using a high voltage for diagnosis of the surge protector 1,

The reference voltage detector 30 includes a HVDC module 31 for generating a high voltage and applying the high voltage to the surge protector 1 and a linear voltage detector 30 for controlling the output voltage of the HVDC module 31 under the control of the microprocessor 14. [ And a control circuit (32).

3C, the voltage applied to the surge protector 1 is gradually increased from the HVDC module 31 through the control of the linear control circuit 32, and at the same time, The leakage current flowing into the surge protector 1 through the leakage current detector 50 is measured to detect the reference voltage of the surge protector 1.

That is, when the voltage applied through the HVDC module 31 gradually increases to exceed about 300 V, the current value detected by the leakage current detector gradually increases. If the detected current value is less than 1 mA, The current value measured by the leakage current detector 50 is set to 1 mA in a feedback system in which the voltage output from the HVDC module 31 is increased again through the linear control circuit 32 The microprocessor 14 increases the voltage output from the HVDC module 31 until the current value measured by the leakage current detector 50 reaches 1 mA. And transmits the detected voltage value to the image output unit 60 to be output.

When a current of 1 mA is detected in the leakage current detector 50, the surge protector 1 installed in a power system of 220 V typically has a problem that when the reference voltage is measured below the reference voltage of the surge protector 1, The surge protector 1 must be immediately replaced when the reference voltage corresponding to the maximum value of the voltage used in the power system is measured.

In order to measure the reference voltage of the surge protector 1 through the reference voltage detector 30, the HVDC module 31 and the surge protector 1 are electrically connected to each other through the operation of the selection switch 40 So that the reference voltage of the surge protector 1 is measured.

The portable surge protector diagnostic apparatus 100 according to the present invention can diagnose the surge protection and measurement unit 10 and the leakage current detection unit 50 to detect the deterioration of the surge protector 1, The deterioration diagnosis of the surge protector 1 is once again performed through the reference voltage output unit 50 to ensure excellent reliability for the surge protector diagnosis.

1, the selection switch 40 allows the HVDC module 31 of the reference voltage detecting unit 30 to be electrically connected to the surge applying and measuring unit 10 or the HVDC module 31 ) To be electrically connected to the surge protector (1).

3, when the diagnosis of the deterioration state of the surge protector 1 is requested through the surge applying and measuring unit 10, the HVDC module 31 and the HVDC module 31 are operated through the operation of the selection switch 40, When the surge generator 11 is connected and a diagnosis of the deterioration state of the surge protector 1 is requested through the reference voltage detector 30, the HVDC module 31, So that the protector 1 is connected.

1, the leakage current detector 50 detects a leakage current value flowing in the surge protector 1 and transmits the detection information to the microprocessor 14 to detect the deterioration of the surge protector 1 By diagnosing the condition,

A clamp type video current transformer 51 for detecting a leakage current flowing through the surge protector 1 and a control circuit for electrically connecting the video current transformer 51 and the microprocessor 14 to detect the detected value of the video current transformer 51 A low-noise amplifier (LNA) 53 for amplifying a detection signal, which is formed on the detection wire 52 and is detected and transmitted by the video current transformer 51, to the microprocessor 14, .

3B, when the deterioration state diagnosis of the surge protector 1 is requested through the leakage current detector 50, the surge protector 1 is electrically connected to the surge protector 1 in order to detect the leakage current of the surge protector 1. [ The leakage current on the measuring wire 3 flowing in the same manner as the surge protector 1 through the image deflector 51 is detected and the detected value is detected by the detection wire 3, And transmits the detected value to the microprocessor 14 via the image output unit 52 to easily detect the deterioration state of the surge protector 1.

When the surge protector normally operates normally, the leakage current value detected through the leakage current detector is formed in the range of 200 to 300 μA as shown in Table 2 below. If the leakage current value exceeds 300 μA, the surge protector Since deterioration is progressing gradually, it is necessary to determine the replacement timing. If the deterioration of the surge protector suddenly exceeds 1000 μA, it should be replaced immediately.

[Table 2] Leakage current waveform

a) steady state

Figure pat00007

b) Degradation progress state

Figure pat00008

It should be noted that the leakage current detector 50 operates without being related to the HVDC module 31 and can diagnose the deterioration state of the surge protector 1 irrespective of the operation of the selection switch 40.

1, the image output unit 60 outputs a clamped voltage value, a leakage current value, and a reference voltage value transmitted from the microprocessor 14 as an image, So that the deteriorated state can be easily diagnosed.

Here, the image output unit 60 may provide a graph format, a numerical value, etc. so that the clamped voltage value, the leakage current value, and the reference voltage value can be clearly recognized.

The portable surge protector diagnostic apparatus 100 having the above-described components of the present invention, which is easy to install and measure, generates a surge through the surge application and measurement unit 10 and applies the surge protector 1 to the clamped voltage And the leakage current value flowing into the surge protector 1 via the leakage current detector 50 is detected to diagnose the deterioration state of the surge protector 1 so that the reliability of the surge protector 1 The surge of high frequency is applied to the surge protector 1 through the coupling unit 20 and the power applied to the surge protector 1 is prevented from entering the surge protector 1, It is possible to diagnose the deterioration state of the surge protector 1 in a state where the system is connected, thereby ensuring the general versatility of the apparatus.

Further, since the surge protector 1 can be diagnosed to be deteriorated in the state where the surge protector 1 is connected to the power system, it is possible to easily carry the apparatus so that it can be easily moved to the place where the surge protector 1 is installed There is an effect that the convenience of movement and carrying of the apparatus can be ensured.

If the abnormality of the surge protector 1 is diagnosed through the surge applying and measuring unit 10 and the leakage current detector 20, the surge protector 1 is recovered, It is possible not only to improve the reliability of the deterioration state diagnosis of the surge protector 1 by detecting the deterioration state of the surge protector 1 by detecting the reference voltage of the protector 1 again, Based on the diagnosis information, the administrator can more clearly determine the replacement and replacement timing of the surge protector 1, thereby effectively preventing the safety accident caused by the loss of the function of the surge protector 1. [

The portable surge protector diagnostic apparatus 100 having the above-described configuration and easy to install and measure according to the embodiment of the present invention is used as follows.

3A, in order to diagnose the deterioration state of the surge protector 1 installed and used as shown in FIG. 3A, the surge generator 11 of the surge applying and measuring unit 10 and the HVDC Module 31 is connected to the HVDC module 31 so that a high voltage is supplied from the HVDC module 31 to the surge generator 11. The input terminal 12a of the input wire 12 and the surge protector 1, A surge is generated through the surge generator 11 under the control of the microprocessor 14 in a state where the output terminal 13a of the output wire 13 and the surge protector 1 are connected by the connection wire 2, And the voltage value clamped through the surge protector 1 is outputted to the image output unit 60 through the microprocessor 14. [

At this time, the surge of high frequency outputted from the surge generator 11 is applied to the surge protector 1 through the coupling unit 20, but the power of the external power system connected to the surge protector 1 is supplied to the surge protector 1 And the surge applying and measuring unit 10 is safely protected from the external power source by interrupting the inflow through the ring unit 20.

3B, after the measurement wire 3 electrically connected to the surge protector 1 is installed, the measurement wire 3 is connected to the measurement line 3 via the video current transformer 51 of the leakage current detector 50, Detects the leakage current, and transmits the detection value to the microprocessor (40) through the detection wire (52) and output through the image output unit (60).

If the deterioration of the surge protector 1 is suspected through the diagnosis of the surge applying and measuring unit 10 and the leakage current detector 50, the surge protector 1 is recovered separately, and then the reference voltage detector 30, The deterioration of the surge protector 1 is detected again,

The HVDC module 31 and the surge protector 1 are connected to each other by the operation of the selection switch 40 in order to detect the reference voltage of the surge protector 1 through the reference voltage detector 30 as shown in FIG. The voltage applied to the surge protector 1 is gradually increased through the HVDC module 31 to measure the reference voltage at the time when the surge protector 1 starts to operate, And provides the output through the image output unit 60 through the microprocessor 14.

Therefore, the user can diagnose the deterioration state of the surge protector 1 through the detection values of the three measuring methods including the surge applying and measuring unit 10, the leakage current detecting unit 50 and the reference voltage detecting unit 30 It is possible to secure an excellent reliability for the diagnosis of the deterioration state of the surge protector 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. You will understand the point. It goes without saying that variations can be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the scope of claim of the present invention is not limited within the scope of the detailed description, but will be defined by the following claims and technical ideas thereof.

1. Surge protectors 2. Connection wires
3. Measurement line
10. Surge Isolation and Measurement
11. Surge generators 12. Input wires
12a. Input terminal 13. Output wire
13a. Output terminal 14. Microprocessor
20. Coupling unit 21. Impedance
22. Capacitor 30. Leakage current detector
31. Video Current Transformer 32. Detection Wire
33. High sensitivity low noise amplifier 40. Image output section
50. Reference voltage detecting section 51. HVDC module
52. Linear control circuit 61. Power line
62. Select switch
100. Portable surge protector diagnostic device that is easy to install and measure

Claims (5)

When a surge is applied to a Surge Protective Device 1 (SPD: Surge Protective Device) and the applied surge is clamped by the surge protector 1, the clamped voltage value is measured by a microprocessor 14 (MPU) A surge applying and measuring unit 10 for detecting a deterioration state of the surge protector 1;
The surge output from the surge applying and measuring unit 10 is applied to the surge protector 1 and the external power connected to the surge protector 1 is prevented from being transmitted to the surge applying and measuring unit 10 A coupling unit (20) for stably diagnosing the deterioration state of the surge protector (1) in a state where external power is applied to the surge protector (1);
The HVDC module 31 outputting a high voltage is selectively connected to the surge applying and measuring unit 10 through the selection switch 40 to supply a high voltage for surge application or the HVDC module 31 is connected to the surge protector 1 for detecting a reference voltage of the surge protector 1 by applying a high voltage to the surge protector 1 and transmitting the detected reference voltage to the microprocessor 14, ;
A selection switch 40 for selectively connecting the HVDC module 31 of the reference voltage detector 30 to the surge applying and measuring unit 10 or electrically connected to the surge protector 1;
A leakage current detector (50) for detecting a leakage current value flowing through the surge protector (1) and transmitting the detection information to the microprocessor (14) to diagnose the deterioration state of the surge protector (1); And
And a video output unit 60 for outputting a clamped voltage value and a leakage current value transmitted from the microprocessor 14 as an image and guiding the user to easily diagnose the deterioration state of the surge protector 1 And a portable surge protector diagnostic device that is easy to install and measure.
The method according to claim 1,
The surge applying and measuring unit (10)
A surge generator 11 for generating a surge under the control of the microprocessor 14,
An input wire 12 having one end electrically connected to the surge generator 11 and the other end having an input terminal 12a for applying a surge generated in the surge generator 11,
The other end of the surge protector 1 is connected to the microprocessor 14 and the other end of the surge protector 1 is connected to an output wire 13a through which an output terminal 13a through which a voltage, 13)
And a microprocessor (14) for controlling the operation of the surge generator (11) and calculating a voltage value transmitted through the output wire (13)
When the deterioration state diagnosis of the surge protector 1 is requested through the surge applying and measuring unit 10,
The input terminal 12a of the input wire 12 and the surge protector 1 are connected to each other by a connecting wire and the output terminal 13 of the output wire 13 and the connecting wire 2 are connected to another connecting wire 2 When a surge is generated through the surge generator 11 and a surge is applied to the input wire 12, a surge is applied to the surge protector through a connection wire 2 connected to the input wire 12, (1), < / RTI >
The applied surge is clamped by the surge protector 1 and transmitted to the output wire 13 through the connection wire 2 connected to the output wire 13 and inputted to the microprocessor 14, The voltage value clamped by the microprocessor 14 is output through the image output unit 60 so that the user can easily diagnose the deterioration state of the surge protector 1,
The input terminal 12a of the input wire 12 and the surge protector 1 and the output terminal 13 of the output wire 13 are electrically connected to the surge protector 1 via the connection wire 2 When a surge is generated through the surge generator 11 and a surge is applied to the input wire 12, the surge is transmitted to the surge protector 1 through the connection wire 2 connected to the input wire 12 Lt; / RTI &
The applied surge is clamped by the surge protector 1 and transmitted to the output wire 13 through the connection wire 2 connected to the output wire 13 and inputted to the microprocessor 14, The voltage value clamped by the microprocessor 14 is output through the image output unit 60 so that the user can easily diagnose the deterioration state of the surge protector 1,
The HVDC module 31 of the reference voltage detector 30 is connected to the surge generator 11 by the selection switch 40 to provide a high voltage for generating surge in the surge generator 11 A portable surge protector diagnostic device that is easy to install and measure.
3. The method of claim 2,
The coupling unit (20)
An impedance 21 formed on the input wire 12,
And a capacitor (22) formed on the input wire (21)
The low frequency of the power system connected to the surge protector 1 is prevented from being transmitted to the surge applying and measuring unit 10 due to the capacitor 22 to prevent an electrical safety accident of the apparatus, The surge generated in the surge protector 1 is applied to the surge protector 1 through the capacitor 22 due to the frequency of the high frequency so that the deterioration of the surge protector 1 It is possible to ensure the ease of use of the apparatus, and at the same time, it is possible to ensure the portability of the apparatus due to the characteristic of easily diagnosing the deterioration state of the surge protector 1 in the installed state. Easy portable surge protector diagnostic device.
The method of claim 3,
The leakage current detector (50)
A clamp-type video current transformer 51 for detecting a leakage current flowing in the surge protector 1,
A detecting wire 52 electrically connecting the video current transformer 51 and the microprocessor 14 to transmit the detection value of the video current transformer 51 to the microprocessor 14,
And a high-sensitivity LNA 53 (LNA) formed on the detection wire 52 for amplifying a detection signal detected and transmitted by the video current transformer 51,
If the deterioration state diagnosis of the surge protector 1 is requested through the leakage current detector 50,
The surge protector 1 is connected to the surge protector 1 through the surge protector 1 after forming the measurement wire 3 electrically connected to the surge protector 1 in order to detect the leakage current of the surge protector 1, Detects a leakage current on the measuring wire 3 and transmits the detected value to the microprocessor 14 through the detection wire 52 to induce a detection value to be output through the video output unit 60, And the deterioration state of the protective device (1) is easily diagnosed.
5. The method of claim 4,
The reference voltage detecting unit 30 detects the surge protector 1 through the surge applying and measuring unit 10 and the leakage current detecting unit 50 using the high voltage to diagnose the surge protector 1, (1) is diagnosed,
An HVDC module 31 for generating a high voltage and applying it to the surge protector 1,
And a linear control circuit (32) for controlling the output voltage of the HVDC module (31) through the control of the microprocessor (14)
The voltage applied to the surge protector 1 is gradually increased from the HVDC module 31 through the control of the linear control circuit 32 while the microprocessor 14 applies the leakage current detection unit 50 And a reference voltage of the surge protector (1) is detected by measuring a leakage current flowing to the surge protector (1) through the ground.
KR1020150117555A 2015-08-20 2015-08-20 Portable SPD diagnostic device KR101770821B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101964593B1 (en) * 2017-11-29 2019-04-02 한국전자통신연구원 Apparatus and method for performance monitoring of power line filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101964593B1 (en) * 2017-11-29 2019-04-02 한국전자통신연구원 Apparatus and method for performance monitoring of power line filter

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