CN201917622U - Decoupling network device of surge protection device - Google Patents
Decoupling network device of surge protection device Download PDFInfo
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- CN201917622U CN201917622U CN2011200025547U CN201120002554U CN201917622U CN 201917622 U CN201917622 U CN 201917622U CN 2011200025547 U CN2011200025547 U CN 2011200025547U CN 201120002554 U CN201120002554 U CN 201120002554U CN 201917622 U CN201917622 U CN 201917622U
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- pass filter
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Abstract
The utility model relates to a decoupling network device of a surge protection device, belonging to the field of lightning science and technology. The decoupling network device comprises a Hall element, an overcurrent protector, an electric voltage regulator, a low-pass filter, a control circuit, a voltage control circuit and a voltage monitoring part, wherein the Hall element, the overcurrent protector, the electric voltage regulator and the low-pass filter are sequentially connected, the input end of the control circuit is respectively connected with a current output end and the output end of the Hall element, the output end of the control circuit is connected with the overcurrent protector, the voltage control circuit is connected with the electric voltage regulator, and the voltage monitoring part is respectively connected with the output end of the electric voltage regulator and the input end of the low-pass filter. The decoupling network device has the advantages of stable working performance, high safety and reliability, simple structure and convenience in use, and can be used with different types of lightning impulse test equipment.
Description
Technical field
The utility model relates to a kind of decoupling network device of surge protector, belongs to thunder and lightning science and technology field.
Background technology
Voltage distribution system surge protector (SPD) is installed in parallel in the line, under the effect of line voltage distribution and lightning surge, the phenomenon of performance degradation occurs.In order to test this performance of surge protector, GB18802.1-2000 in the standard of the test method of associated electrical surge protectors such as YD/T1235.2-2002, has stipulated the test method and the requirement of the deboost and the operating duty of surge protector.Requirement is simulated its condition of work by the impact that surge protector is applied stipulated number and specified waveform; require its AC power that SPD is applied maximum Uc (UC); the power supply of powering for SPD is not less than 5A at the output current under the UC, and short-circuit current should be not less than 200A.During impulse test, require power supply not influence the power supply of other equipment, more can not cause damage because of impact makes other power-supply units.
When carrying out the impulse test of equipment and SPD, impact between power supply and the low-voltage power supply electric current and must satisfy two conditions: the first, dash current is applied on the SPD by capacitive coupling, should not impact the low-voltage power supply electric current; The second, low-voltage power supply should be added on the SPD in process of the test, makes it to be in electriferous state.The capacitive coupling that is used for power lead when inserting surge source decoupling network device, can also insert trial voltage by capacitive coupling by line-line or line-ground mode.
The utility model content
The utility model provides a kind of decoupling network device of surge protector, dash current can be put on tested device or SPD, solves interactional problem between dash current and the power frequency supply current.
The utility model adopts following technical scheme for solving its technical matters:
A kind of decoupling network device of surge protector; comprise Hall element; overcurrent protector; electric voltage regulator; low-pass filter; control circuit; voltage control circuit; the voltage monitoring part; wherein; Hall element; overcurrent protector; electric voltage regulator and low-pass filter are linked in sequence; the input end of control circuit connects the output terminal and the Hall component output of electric current respectively; the output terminal of control circuit links to each other with overcurrent protector; voltage control circuit links to each other with electric voltage regulator, and the voltage monitoring part is connected with the output terminal of electric voltage regulator and the input end of low-pass filter respectively.
Described low-pass filter is made up of two inductance and four electric capacity, and an end of first electric capacity links to each other with an end of first inductance, and the first electric capacity other end links to each other with an end of second inductance; Second electric capacity links to each other with the other end of first inductance with series circuit one end that the 3rd electric capacity is formed, and the other end of this series circuit links to each other with the second inductance other end; The series circuit that the 4th electric capacity and second electric capacity and the 3rd electric capacity are formed constitutes parallel circuit.
The beneficial effects of the utility model are as follows:
1, the impedance of decoupling network is big, and is little to the waveform influence that is tried lightning current shock wave on the circuit.
2, the withstand shock voltage height of decoupling network can reach 60kV, good insulation preformance.
3, load current is big, and maximum power current is 200A, and inside is provided with the electronic type overcurrent protective device.
4, during the load end impulse test, the residual voltage of decoupling network input end is low.
5, during decoupling network load end impulse test, little to the influence of other power-supply unit.
6, the decoupling network stable work in work is safe and reliable.
7, circuit structure is simple, and is easy to use, can be used with dissimilar impact devices.
8, the decoupling network output voltage is adjustable continuously, is applicable to the SPD test of different U C values.
Description of drawings
The theory diagram of the decoupling network device of Fig. 1 surge protector.
The circuit theory diagrams of the decoupling network device of Fig. 2 surge protector.
Fig. 3 low-pass filter circuit schematic diagram.
Fig. 4 overcurrent protector circuit theory diagrams.
Fig. 5 electric voltage regulator circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing the invention is described in further details.
A kind of theory diagram of decoupling network device of surge protector as shown in Figure 1, chief component has: Hall element, overcurrent protector, electric voltage regulator, low-pass filter, control circuit, voltage control circuit and voltage detection department are grouped into.The main effect of its course of work and each several part is: the alternating voltage of civil power 220V passes through Hall element; Hall element and phase line L are contactless; Hall element induces voltage signal according to the size of electric current among the phase line L; deliver to control circuit; by the size of control circuit according to induced voltage, the control overcurrent protector, electric current overcurrent protector in normal range is in conducting state; when electric current surpasses a certain value (being made as 200A), overcurrent protective device disconnects.If resume work and to reset again by control circuit.U delivers to electric voltage regulator through overcurrent protector output ground voltage, and electric voltage regulator is adjustable autotransformer, and input voltage is an alternating current 220V, and output voltage can reach 500V, satisfies the requirement of IEC61643-1 regulation UC.The voltage of electric voltage regulator output is added to the low-pass filter that is made of inductance, electric capacity as required, and SPD receives the output terminal of low-pass filter, and the shock wave of lightning impulse equipment output is added to the two ends of SPD by coupling capacitance.
A kind of circuit theory diagrams of decoupling network device of surge protector as shown in Figure 2; the chief component of circuit is current transformer (Hall element) by T; rated operational current is 20A, and maximum operating currenbt is 40A, and rated output voltage is AC value 1V.J1 is the major loop relay, and shock current is interchange 25A, rated voltage 250V, and the coil DC voltage is 12V.T and J1 constitute holding circuit.Electric voltage regulator, input voltage are 220V, and output voltage is 220V～500V.Moving contact and micro-machine M constitute the interlock motor, and the forward and reverse of control interlock motor can change the height of output voltage.V1 is a voltage table, the monitoring output voltage, and satisfying the magnitude of voltage that is added on the SPD is UC.Capacitor C 1, C2, C3, C4 and inductance L
C1, L
C2 constitute low-pass filter.Capacitor C 7 is the coupling capacitance of shock wave.
The course of work of the decoupling network device of surge protector: energized; press start button; major loop relay J 1 closing of contact; the power supply power supply is added to the elementary winding of autotransformer; boost button is pressed output voltage is increased; the step-down button is pressed and can be made the output voltage step-down, by the voltage table monitoring, is that output voltage is the UC value of SPD.The surge voltage ripple is added on the SPD by coupling capacitance C7.When the short circuit damage appearred in SPD, hall element output voltage increased, and by comparator circuit output high level signal, control major loop relay J 1 disconnects, and makes the disconnection of primary power circuit.
A kind of composition and principle of work of circuit each several part of decoupling network device.
Low-pass filter circuit mainly is made up of inductance L as shown in Figure 3
C1, L
C2 and capacitor C 1, C2, C3, C4 constitute second-order low-pass filter.Have Fig. 3 as can be known, inductance is big more, and its electric capacity is more little; Otherwise then electric capacity is big more.Select the bigger scheme of inductance in the design of this decoupling network device, inductance one regularly can suitably strengthen electric capacity, and at this moment the pole frequency of low-pass filter network can reduce, and can reduce the decay of surging signal.Inductance L
CValue be 20mH, the value of capacitor C is the high-voltage capacitance of 1～2 μ F, withstand voltage is 10kV, inductance will be considered the size in line footpath, the cross section of general lead is at 5mm
2More than.
The overcurrent protector circuit mainly is made of the filter rectifier of Hall element signal, potentiometer, operational amplifier, triode, relay etc. as shown in Figure 4.This circuit can be divided into three partial analysis, Hall element stimulus part, signal comparator circuit part, relay control section.The Hall element stimulus part is formed current rectifying and wave filtering circuit by capacitor C 5, C6, diode D1 etc., and the signal input signal comparator circuit after will handling.Signal comparator circuit is made up of operational amplifier A R1, AR2 and potentiometer R1, resistance R 4, R5 etc.Potentiometer R1 and operational amplifier A R1 form voltage follower input operational amplifier AR2, utilize resistance R 5, R6 to carry out the adjusting of gain amplifier, and by resistance R 5 outputs.Control relay circuit is made up of triode S1, diode D2 and relay J 3.When operational amplifier in-phase input end voltage was higher than inverting input voltage, triode S1 conducting make the normally closed contact of relay J 3 disconnect, thereby major loop disconnected, and this moment, circuit was in the overcurrent protection state.During the main circuit operate as normal, triode S1 is in cut-off state, and the normally closed contact of J3 is failure to actuate, the main circuit operate as normal.The effect of diode D2 is the recoil electric current when preventing that the collector of triode S1 is subjected to relay on-off and damaging.
The electric voltage regulator circuit as shown in Figure 5, mainly by boost button, step-down button, interlock motor, electric voltage regulator constitutes.Press and boost or the step-down button, the interlock motor action, moving contact and micro-machine M constitute the interlock motor, and the forward and reverse of control interlock motor can change the height of output voltage.Because different types of SPD, the UC value of its nominal is not quite similar, thus by electric voltage regulator voltage is adjusted to the UC value that SPD goes up nominal, thus simulate SPD installation situation in the line, with the test of the SPD that adapts to different UC.This electric voltage regulator adopts automatic coupling voltage regulator, and this is because if adopt doublewound pressure regulator can make power supply after passing through electric voltage regulator, L line and N line are obscured.
4. voltage table monitors
Voltage table is general AC digital voltmeter, is used to show the UC magnitude of voltage that is added on the SPD.
Claims (2)
1. the decoupling network device of a surge protector; it is characterized in that comprising Hall element; overcurrent protector; electric voltage regulator; low-pass filter; control circuit; voltage control circuit; the voltage monitoring part; wherein; Hall element; overcurrent protector; electric voltage regulator and low-pass filter are linked in sequence; the input end of control circuit connects the output terminal and the Hall component output of electric current respectively; the output terminal of control circuit links to each other with overcurrent protector; voltage control circuit links to each other with electric voltage regulator, and the voltage monitoring part is connected with the output terminal of electric voltage regulator and the input end of low-pass filter respectively.
2. the decoupling network device of a kind of surge protector according to claim 1 is characterized in that described low-pass filter is by two inductance (L
C1, L
C2) and four electric capacity (C1, C2, C3, C4) form an end of first electric capacity (C1) and the first inductance (L
C1) a end links to each other, first electric capacity (C1) other end and the second inductance (L
C2) a end links to each other; Series circuit one end and the first inductance (L that second electric capacity (C2) and the 3rd electric capacity (C3) are formed
C1) the other end links to each other, the other end of this series circuit and the second inductance (L
C2) other end links to each other; The 4th electric capacity (C4) constitutes parallel circuit with the series circuit that second electric capacity (C2) and the 3rd electric capacity (C3) are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200025547U CN201917622U (en) | 2011-01-06 | 2011-01-06 | Decoupling network device of surge protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200025547U CN201917622U (en) | 2011-01-06 | 2011-01-06 | Decoupling network device of surge protection device |
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| Publication Number | Publication Date |
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| CN201917622U true CN201917622U (en) | 2011-08-03 |
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| CN2011200025547U Expired - Fee Related CN201917622U (en) | 2011-01-06 | 2011-01-06 | Decoupling network device of surge protection device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904924A (en) * | 2014-03-06 | 2014-07-02 | 国家电网公司 | High-capacity anti-interference high-voltage switch test power source |
| CN106226725A (en) * | 2016-08-30 | 2016-12-14 | 山东省计量科学研究院 | The auxiliary current decoupling network device of electric energy meter EMS Online Transaction Processing |
| CN106226726A (en) * | 2016-08-30 | 2016-12-14 | 山东省计量科学研究院 | The auxiliary signal decoupling network device of electric energy meter EMS Online Transaction Processing |
| CN106443554A (en) * | 2016-08-30 | 2017-02-22 | 山东省计量科学研究院 | Auxiliary integrated decoupling network system for electric energy meter EMS online test system |
| CN108594158A (en) * | 2018-02-09 | 2018-09-28 | 浙江迅驰科技有限公司 | DM EMI experimental rig and method |
| CN109239502A (en) * | 2018-11-21 | 2019-01-18 | 珠海德利和电气有限公司 | A kind of Surge Protector test device |
-
2011
- 2011-01-06 CN CN2011200025547U patent/CN201917622U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904924A (en) * | 2014-03-06 | 2014-07-02 | 国家电网公司 | High-capacity anti-interference high-voltage switch test power source |
| CN106226725A (en) * | 2016-08-30 | 2016-12-14 | 山东省计量科学研究院 | The auxiliary current decoupling network device of electric energy meter EMS Online Transaction Processing |
| CN106226726A (en) * | 2016-08-30 | 2016-12-14 | 山东省计量科学研究院 | The auxiliary signal decoupling network device of electric energy meter EMS Online Transaction Processing |
| CN106443554A (en) * | 2016-08-30 | 2017-02-22 | 山东省计量科学研究院 | Auxiliary integrated decoupling network system for electric energy meter EMS online test system |
| CN108594158A (en) * | 2018-02-09 | 2018-09-28 | 浙江迅驰科技有限公司 | DM EMI experimental rig and method |
| CN108594158B (en) * | 2018-02-09 | 2023-09-29 | 浙江迅驰科技有限公司 | Differential mode interference test device and method |
| CN109239502A (en) * | 2018-11-21 | 2019-01-18 | 珠海德利和电气有限公司 | A kind of Surge Protector test device |
| CN109239502B (en) * | 2018-11-21 | 2023-09-08 | 珠海德利和电气有限公司 | Surge protector testing arrangement |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20130106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |