CN206293872U - A kind of SPD back-up protection devices based on electromagnetic differential - Google Patents

A kind of SPD back-up protection devices based on electromagnetic differential Download PDF

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Publication number
CN206293872U
CN206293872U CN201621121355.7U CN201621121355U CN206293872U CN 206293872 U CN206293872 U CN 206293872U CN 201621121355 U CN201621121355 U CN 201621121355U CN 206293872 U CN206293872 U CN 206293872U
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CN
China
Prior art keywords
power frequency
electromagnetic
frequency over
protection
spd
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201621121355.7U
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Chinese (zh)
Inventor
罗保庆
姜克强
蔡细楚
刘大为
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHAN ARROW ADVANCED TECHNOLOGY CO LTD
Original Assignee
WUHAN ARROW ADVANCED TECHNOLOGY CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WUHAN ARROW ADVANCED TECHNOLOGY CO LTD filed Critical WUHAN ARROW ADVANCED TECHNOLOGY CO LTD
Priority to CN201621121355.7U priority Critical patent/CN206293872U/en
Application granted granted Critical
Publication of CN206293872U publication Critical patent/CN206293872U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of SPD back-up protection devices based on electromagnetic differential, it is related to lightning surge to press protection device.The utility model includes SPD(20)Line terminals are crimped with screw(30);It is provided with protection location(10);Protection location(10), screw crimping line terminals(30)And SPD(20)It is sequentially connected;Described protection location(10)Including contact switch(11), electromagnetic differential power frequency over-current detector(12), overcurrent tripping mechanism(13), closing by hand handle(14)And indicating fault(15).The utility model crimps line terminals, easy-to-connect using the screw of Conventional compact short-circuiting device;Using electromagnetic differential power frequency over-current detector, with the dropout less than 1A power currents, the performance do not threaded off in the presence of amplitude thunder and lightning lighting surge;Under the effect of thunder and lightning lighting surge, low residual voltage is presented;Excellent lightning protection performance, ensured system uses safety, it is adaptable to the back-up protection of all kinds of SPD.

Description

A kind of SPD back-up protection devices based on electromagnetic differential
Technical field
The utility model is related to lightning surge to press protection device, more particularly to a kind of SPD standby based on electromagnetic differential Protector, in SPD short troubles, failure SPD is cut off from circuit.
Background technology
Surge protector is used together known, its effect with the overcurrent protection such as breaker or fusing road It is that overcurrent protection opens it from system break when short trouble occurs in surge protector, in case locking system continues event The presence of barrier.
Within the specific limits, the thunder and lightning lighting surge tolerance of existing breaker and action (dropout) electric current are in positive tropism Relation;Briefly, action (dropout) electric current of breaker is smaller, and surge tolerance is also smaller, and surge tolerance is high Breaker, its action (dropout) electric current it is also larger.
According to relevant criterion and actually used situation, the reserve protection for thunder and lightning lighting Surge Protector will meet Three basic demands:
First, this protection device is intended merely to protect surge protector, is a kind of terminal device protection device, its Action otherwise, should will influence the power supply of circuit miscellaneous equipment prior to prime line protective devices, meanwhile, action setting valve should Failure leakage current is matched when being worked with protected SPD, should be less than 1A (industrial frequency AC);
Second, the surge ability to bear of this protection device is not lower than the maximum electric discharge electricity of protected surge protector Stream, otherwise, may cause by the damage of protection equipment in surge protector normally releases surge current range;
3rd, this protection device is not to be exceeded with the residual voltage (protection voltage) of protected thunder and lightning lighting Surge Protector The insulation tolerance level of protected circuit or equipment, otherwise, surge protector loses protecting effect.
It is used for the back-up protection of thunder and lightning lighting Surge Protector due to Conventional compact breaker, because its protection technique is to be based on The protection feature of power current, does not account for the action request of short-circuiting device under surge characteristic, so it is difficult to meeting above-mentioned three simultaneously Bar basic demand.
For example, the low protection device of action current may meet the requirement of preferential action, but its thunder and lightning lighting surge bears Ability is often very low, and residual voltage is also very high;Action current protection device high, surge ability to bear and residual voltage can meet It is required that, but requirement of its preferential action differs and surely meet.
Utility model content
The purpose of this utility model is that the shortcoming and defect for overcoming prior art to exist, there is provided a kind of poor based on electromagnetism Dynamic SPD back-up protection devices;This protector has can bear lightning current high impact, and smaller power frequency is adjusted action current and lightning current The performance characteristics of the low residual voltage under percussion.
The technical scheme that the utility model is used is:
Including SPD and screw crimping line terminals;
It is provided with protection location;
Protection location, screw crimping line terminals and SPD are sequentially connected.
Described protection location includes contact switch, electromagnetic differential power frequency over-current detector, manually overcurrent tripping mechanism, conjunction Sneek and indicating fault;
Its position and annexation are:
Contact switch and electromagnetic differential power frequency over-current detector are connected in main circuit;
Overcurrent tripping mechanism is disconnected to contact switch by electromagnetic core and electromagnetic differential power frequency over-current detector mechanical linkage Open;
Closing by hand handle is arranged at the outside of overcurrent tripping mechanism, and contact switch is closed.
Compared with existing SPD back-up protections device technology, the utility model patent has the advantages that:
1. using the screw crimping line terminals of Conventional compact short-circuiting device, easy-to-connect;
2. electromagnetic differential power frequency over-current detector is used, with the dropout less than 1A power currents, in amplitude thunder and lightning electricity Dodge the performance do not threaded off in the presence of surge;
3. under the effect of thunder and lightning lighting surge, low residual voltage is presented;
In a word, excellent lightning protection performance, ensured system uses safety, it is adaptable to the back-up protection of all kinds of SPD.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of electromagnetic differential power frequency over-current detector 12.
In figure:
10-protection location 10,
11-contact switch,
12-electromagnetic differential power frequency over-current detector,
121-power frequency over-current detection coil, 122-electromagnetic differential coil,
123-non-linear thunder and lightning lighting surge switch, 124-electromagnetic core;
13-overcurrent tripping mechanism,
14-closing by hand handle,
15-indicating fault;
20-SPD,
21-Zinc-oxide piezoresistor;
30-screw crimps line terminals.
Specific embodiment
Describe in detail with reference to the accompanying drawings and examples:
1st, it is overall
Such as Fig. 1, the utility model includes SPD20 and screw crimping line terminals 30;
It is provided with protection location 10;
Protection location 10, screw crimps line terminals 30 and SPD20 is sequentially connected.
2nd, functional part
1) protection location 10
Such as Fig. 1, protection location 10 includes contact switch 11, electromagnetic differential power frequency over-current detector 12, overcurrent tripping mechanism 13rd, closing by hand handle 14 and indicating fault 15;
Its position and annexation are:
Contact switch 11 and electromagnetic differential power frequency over-current detector 12 are connected in main circuit;
Overcurrent tripping mechanism 13 passes through electromagnetic core 124 and the mechanical linkage of electromagnetic differential power frequency over-current detector 12, to touching Point switch 11 disconnects;
Closing by hand handle 14 is arranged at the outside of overcurrent tripping mechanism 13, and contact switch 11 is closed.
(1) contact switch 11
Contact switch 11 is a kind of general-purpose device;
Its function is to disconnect and closed circuit.
(2) electromagnetic differential power frequency over-current detector 12
Such as Fig. 2, electromagnetic differential power frequency over-current detector 12 includes power frequency over-current detection coil 121, electromagnetic differential coil 122nd, non-linear thunder and lightning lighting surge switchs 123 and electromagnetic core 124;
Electromagnetic core 124 is wound on respectively around to opposite power frequency over-current detection coil 121 and electromagnetic differential coil 122 Outside, the bottom of power frequency over-current detection coil 121 and the bottom of electromagnetic differential coil 122 are connected to screw crimping line terminals 30; The top of power frequency over-current detection coil 121 is connected to the bottom of contact switch 11, and the top of electromagnetic differential coil 122 is by non-linear Thunder and lightning lighting surge switch 123 again contact point switch 11 bottom.
(3) overcurrent tripping mechanism 13
Overcurrent tripping mechanism 13 is a kind of current mechanism, i.e., a kind of small air breaker;
Its function is:When there is excessively stream, under the promotion of electromagnetic core 124, contact switch 11 is disconnected.
(4) closing by hand handle 14
Closing by hand handle 14 is a kind of closing by hand switch;
Its function is:The contact switch 11 that will be switched off is closed.
(5) indicating fault 15
Indicating fault 15 is a kind of mark being printed on closing by hand handle 14, and display contact switch 11 is closed or disconnected State.
2)SPD20
SPD20 is a kind of lightning surge protection, and its core component is Zinc-oxide piezoresistor 21.
3) screw crimping line terminals 30
Screw crimping line terminals 30 are a kind of general parts.
3rd, operation principle
Using electromagnetic differential principle.
Core devices of the present utility model are electromagnetic differential power frequency over-current detectors 12, by 1 power current detection coil 121, coaxially and around 1 constituted around to opposite electromagnetic differential coil 122, and non-linear thunder and lightning lighting surge switch 123;Electromagnetism Differential coil 122 is incorporated to power current detection coil 121 after being connected with 1 non-linear thunder and lightning lighting surge switch element 123.
When power current detection coil 121 flow through less than adjust power frequency electric flow valuve when, overcurrent tripping mechanism 13 is failure to actuate, touch Point switch 11 is remained closed;
When power current detection coil 121 flow through more than adjust power frequency electric flow valuve when, overcurrent tripping mechanism 13 acts, contact Switch 11 disconnects;
When there is thunder and lightning lighting surge, the automatic closure of non-linear thunder and lightning lighting surge switch 123, electromagnetic differential coil 122 it is in parallel with power current detection coil 121 flow through amplitude identical surge current, because 2 coils are around to conversely, its axial direction The electromagnetic force that magnetic flux difference is produced is zero or the setting valve less than power current detection coil 121, and overcurrent tripping mechanism 13 is failure to actuate, Contact switch 11 is remained closed.

Claims (2)

1. a kind of SPD back-up protection devices based on electromagnetic differential, including SPD(20)Line terminals are crimped with screw(30);
It is characterized in that:
It is provided with protection location(10);
Protection location(10), screw crimping line terminals(30)And SPD(20)It is sequentially connected;
Described protection location(10)Including contact switch(11), electromagnetic differential power frequency over-current detector(12), overcurrent tripping machine Structure(13), closing by hand handle(14)And indicating fault(15);
Its position and annexation are:
Contact switch(11)With electromagnetic differential power frequency over-current detector(12)It is connected in main circuit;
Overcurrent tripping mechanism(13)By electromagnetic core(124)With electromagnetic differential power frequency over-current detector(12)Mechanical linkage, it is right Contact switch(11)Disconnect;
Closing by hand handle(14)It is arranged at overcurrent tripping mechanism(13)Outside, to contact switch(11)Closure.
2. SPD back-up protection devices as described in claim 1, it is characterised in that:
Described electromagnetic differential power frequency over-current detector(12)Including power frequency over-current detection coil(121), electromagnetic differential coil (122), non-linear thunder and lightning lighting surge switch(123)And electromagnetic core(124);
Around to opposite power frequency over-current detection coil(121)With electromagnetic differential coil(122)Electromagnetic core is wound on respectively(124) Outside, power frequency over-current detection coil(121)Bottom and electromagnetic differential coil(122)Bottom be connected to screw crimping line end Son(30);Power frequency over-current detection coil(121)Top be connected to contact switch(11)Bottom, electromagnetic differential coil(122)'s Top is switched by non-linear thunder and lightning lighting surge(123)Contact point is switched again(11)Bottom.
CN201621121355.7U 2016-10-12 2016-10-12 A kind of SPD back-up protection devices based on electromagnetic differential Withdrawn - After Issue CN206293872U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621121355.7U CN206293872U (en) 2016-10-12 2016-10-12 A kind of SPD back-up protection devices based on electromagnetic differential

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621121355.7U CN206293872U (en) 2016-10-12 2016-10-12 A kind of SPD back-up protection devices based on electromagnetic differential

Publications (1)

Publication Number Publication Date
CN206293872U true CN206293872U (en) 2017-06-30

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Application Number Title Priority Date Filing Date
CN201621121355.7U Withdrawn - After Issue CN206293872U (en) 2016-10-12 2016-10-12 A kind of SPD back-up protection devices based on electromagnetic differential

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451335A (en) * 2016-10-12 2017-02-22 武汉爱劳高科技有限责任公司 SPD (surge protective device) back-up protector based on electromagnetic differential motion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451335A (en) * 2016-10-12 2017-02-22 武汉爱劳高科技有限责任公司 SPD (surge protective device) back-up protector based on electromagnetic differential motion
CN106451335B (en) * 2016-10-12 2018-07-31 武汉爱劳高科技有限责任公司 SPD back-up protection devices based on electromagnetic differential

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Granted publication date: 20170630

Effective date of abandoning: 20180731