CN204391701U

CN204391701U - A kind of Novel electric surge protector

Info

Publication number: CN204391701U
Application number: CN201420691617.8U
Authority: CN
Inventors: 孙麓轩
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-08
Filing date: 2014-11-08
Publication date: 2015-06-10
Anticipated expiration: 2024-11-08

Abstract

The utility model relates to a kind of Novel electric surge protector, mainly comprises lightning protection component, power current inhibitor, magnetic field sensor, energy conversion device, overcurrent protective device thermel protection device, flow restricter, time delay step electromagnet, sensing chip, break contact, tripping mechanism, arc-chute, arc extinguishing magnetic blow-out plate and upper and lower terminals.Magnetic field sensor in the utility model can sense the magnetic field of lightning protection component side; and introduce energy conversion device and be converted to electric current; by corresponding electric current input time delay step electromagnet; time delay step electromagnet causes a series of mechanical linkage; conducting bypass and path short circuit that surge is released, thus realize the protective effect to surge protector.

Description

A kind of Novel electric surge protector

Technical field

The utility model belongs to the surge protection technical field of electronic electric equipment.

Background technology

Thunder and lightning aloft to be discharged a kind of special weather phenomenon caused by charged cloud.Thunder and lightning is the major reason causing electronic equipment to damage, and it threatens the safe and stable operation of the every field electronic informations such as building, railway, civil aviaton, communication, industry control, military affairs.It is one of important measures of lightning protection that the metallic circuits such as the power line be connected with electronic equipment, holding wire and control line install surge protector.Surge protector has been widely used in various field, has important effect in lightning protection.The quality of its state then directly affects its lightning protection effect, thus brings hidden danger to the safety of institute's proterctive equipment.

Present stage SPD has Thermal protection and overcurrent protection (internal or external) two kinds of protective devices in use usually; thermel protection device is used for protecting lightning protection component deterioration heating; overcurrent protective device is used for the lightning protection component puncture short preventing transient over-current or overvoltage from causing; simultaneously overcurrent protection as a kind of backup protection mode of Thermal protection, so effective protective action can be played in most of occasion.

But because heat transfer is a relatively slow process; the sensitivity of thermel protection device is low; still effective protection can be played for slow temperature-rise period; but for low (in) steep temperature rise situation owing to causing under sustained over voltage condition in pressing system; Thermal protection trip gear can not this process of perception in time and action does not occur; cause lightning protection component breakdown; power current enters SPD circuit; when this power frequency electric flow valuve does not reach the initiation value of overcurrent protective device; also can not there is action in overcurrent protective device, thus cause SPD on fire.

In sum, there is serious action blind area in protection angle in existing SPD, in this region, and all akinesias of thermel protection device and overcurrent protective device, thus there is serious potential safety hazard.

Utility model content

In order to effectively solve the above prior-art problems, the utility model proposes a kind of easy for installation and Novel electric surge protector for power-supply system of dependable performance, the basic action blind zone problem solving existing thermel protection device and overcurrent protective device.

The utility model is by the following technical solutions: the utility model is for the surge protector in power electronic circuits system, described surge protector mainly comprises lightning protection component, power current inhibitor, magnetic field sensor, energy conversion device, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, sensing chip, tripping mechanism, break contact and shell, described lightning protection component and overcurrent protective device series connection, form surge and to release path; Described thermel protection device is positioned at lightning protection component electrode pin place; Described magnetic field sensor is installed on surge and releases near path, is connected with energy conversion device; Described energy conversion device connects the input of step electromagnet; The other end of described time delay step electromagnet acts on sensing chip; Described break contact comprises moving contact and fixed contact; Described sensing chip is connected by trip gear with moving contact; Fixed contact and flow restricter are in parallel with lightning protection component after connecting.

Magnetic field sensor in the utility model can sense the magnetic field flow through lightning protection component electric current and produce, the Magnetic Field that magnetic field sensor records by energy conversion device is converted into electric current and is transferred to time delay step electromagnet, the time difference of the signal that described time delay step electromagnet can export respectively according to induced lightening electric current and power current, realizes a kind of parametrization and controls.Power current is the periodic wave of Millisecond, and the electric current that energy conversion device is converted to also has this characteristic, and time delay step electromagnet can through pulse number stepping, start after Millisecond time delay, promote tablet, drive tripping mechanism, disjunction SPD path, plays a protective role; In like manner, lightning current is fast-changing Microsecond grade pulse, and time delay step electromagnet can not complete pulse number stepping, enter delay stage, and lightning current flows through, so tripping mechanism is failure to actuate, ensures that lightning current is released smoothly.

Described power current inhibitor is connected with lightning protection component, is finally connected with lower terminals; Described magnetic field sensor is placed in surge and releases by path, to release the magnetic direction that path produces perpendicular to surge, the Magnetic Field recorded is transferred to energy conversion device by magnetic field sensor, Magnetic Field is converted into electric current and transfers to time delay step electromagnet by energy conversion device, the motion of time delay step electromagnet iron core can promote tablet, thus drives whole tripping mechanism that moving contact is contacted with fixed contact; Simultaneously by reset switch hand-reset; Arc-chute and arc extinguishing magnetic blow-out plate are for eliminating the electric arc produced when moving contact contacts with fixed contact.

The working method of this Novel electric surge protector: when surge current flows through, responded to by magnetic field sensor, and through energy conversion device conversion current signal transfer to time delay step electromagnet, but because lightning current is fast-changing Microsecond grade pulse, time delay step electromagnet can not complete pulse number stepping, enter delay stage, electromagnetism actuating mechanism is failure to actuate, and SPD normally releases surge current; When lightning protection component deterioration, when power frequency leakage current flows through lightning protection component, be installed on lightning protection component electrode tip thermel protection device heating melt, make surge release path disconnect, avoid surge protector breaking out of fire; When power system failure, power current flow through, lightning protection component inefficacy short circuit time; power current inhibitor can play inhibitory action to the electric current now flow through; cause and can slowly be risen by the power frequency electric flow valuve of lightning protection component; extend the time of SPD breaking out of fire accident, simultaneously the quick-action after pulse number stepping, Millisecond time delay of time delay step electromagnet, promote tablet; drive tripping mechanism; closed break contact, thus cut off SPD path, realize the protective effect to lightning protection component.

Of the present utility modelly to be characterised in that:

1. this Novel electric surge protector solves the action blind zone problem of thermel protection device and overcurrent protective device; bypass is made up of tablet, tripping mechanism, break contact, flow plug; moving contact and tripping mechanism; tablet connects; tablet controls by time delay step electromagnet, and the electric current on time delay step electromagnet finally depends on the magnetic field that surge that magnetic field sensor senses is released around path.

2. the lightning protection component of this Novel electric surge protector, magnetic field sensor, energy conversion device, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, tripping mechanism, break contact accessible site are in one, be loaded on housing, meet the requirement of power consumption equipment to surge protector discharge capacity, response time and voltage protection level three indexs, enhance the reliability of equipment, also can be encapsulated in different modules and combine, be convenient to install and use;

3. this Novel electric surge protector can not have overcurrent protective device.

4. magnetic field sensor and energy conversion device can independently be arranged, and also can adopt the magnetic field sensor with energy conversion device.

Accompanying drawing explanation

Fig. 1 is the first example structure of the present utility model

Fig. 2 is the schematic diagram of the first embodiment of the present utility model

Fig. 3 is the schematic diagram of the second embodiment of the present utility model

Fig. 4 is the schematic diagram of the 3rd embodiment of the present utility model

Fig. 5 is the utility model protected effect schematic diagram

Fig. 6 is the utility model workflow diagram ideally

Embodiment

Below in conjunction with drawings and Examples, the utility model is further illustrated:

As shown in the figure, 1 is upper terminals, and 2 is break contacts, and 3 is tripping mechanisms; 4 is reset switches, and 5 is tablets, and 6 is magnetic field sensors, and 7 is power current inhibitor; 8 is lower terminals, and 9 is shells, and 10 is lightning protection components, and 11 is time delay step electromagnets; 12 is arc-chutes, and 13 is arc extinguishing magnetic blow-out plates, and 14 is flow restricters; 15 is overcurrent protective devices, and 16 is thermel protection devices, and 17 is bypass; 18 is moving contacts, and 19 is fixed contacts, and 20 is energy conversion devices.Fig. 1 is the structural representation of the utility model embodiment one, and described upper terminals (1), power current inhibitor (7), thermel protection device (16), lightning protection component (10), overcurrent protective device (15), lower terminals (8) are connected in series.

Described power current inhibitor (7), is series between upper and lower terminals, has inhibitory action to the power current flow through, and can race against time for lightning protection component fault is on fire below.

Described thermel protection device (16) is positioned at lightning protection component (10) electrode pin place; when there being less power current to flow through lightning protection component (10); thermel protection device (16) action, disconnects surge and to release path, protection lightning protection component.

Described lightning protection component (10), comprises piezo-resistance, discharge tube, TVS one or a combination set of;

Described magnetic field sensor (6) plane orthogonal in magnetic direction, the magnetic field that can exist around induction line, and Magnetic Field is exported to energy conversion device (20).

The magnetic field energy received can be converted to electric current energy by described energy conversion device (20), and exports the electric current obtained to time delay step electromagnet (11).

Under current technical background; described magnetic field sensor (6) and energy conversion device (20) can be placed in same equipment; the function of what this equipment completed is also described magnetic field sensor (6) and energy conversion device (20), therefore also should within protection range of the present utility model.

Described reset switch (4) closes when moving contact and fixed contact, resetting manually (after determining that SPD does not damage), making main road recover through-flow, thus making unspoiled SPD again take back circuit by closing reset switch (4).

Described arc-chute (12) and arc extinguishing magnetic blow-out plate (13) form the arc-control device of this Novel electric surge protector, for eliminating the electric arc produced when moving contact separates with fixed contact.

The circuit that described flow restricter (14) can be one of electronic devices such as resistance, inductance, electric capacity or be combined by it.

Described overcurrent protective device (15) can be fuse or circuit breaker, and when the electric current flowing through lightning protection component is larger power current, this device effect, disconnects surge and to release path.

Fig. 2 is the schematic diagram of the first embodiment; namely when power current flow through surge release path time; its energy is by electric energy magnetic field energy-electric transformation of energy; step electromagnet is made to trigger the mechanical linkage of tripping mechanism (3); closed break contact (2); conducting bypass, realizes the protection to lightning protection component.

Fig. 3 is the schematic diagram of the utility model second embodiment; there is no overcurrent protective device (15) in the surge protector of this embodiment, only comprise surge and to release path, bypass (17) and magnetic field sensor (6), power current inhibitor (7), energy conversion device (17), time delay step electromagnet (11), tripping mechanism (3), tablet (5), break contact (2).This second embodiment gives the fundamental diagram of the surge protector in the utility model in such cases.Because surge protector in use; if inside does not have built-in overcurrent protective device; so rear end must be connected in series overcurrent protective device; therefore the Novel electric surge protector that describes of the present embodiment have power current by time can allow the timely action of its external overcurrent protective device, thus surge protector is departed from operating circuit.

Fig. 4 is the schematic diagram of the 3rd embodiment of the present utility model, in the practical application of surge protector, described lightning protection component (10) and magnetic field sensor (6) may be there is, energy conversion device (17), power current inhibitor (7), overcurrent protective device (15), thermel protection device (16), flow restricter (14), time delay step electromagnet (11), tripping mechanism (3), break contact (2) is installed on the situation of different housings, wherein a kind of fundamental diagram is only listed at this, the program is also applicable to other distortion in the case simultaneously.

Fig. 1, Fig. 2 are the embodiment that each element concentrates on one, and Fig. 3, Fig. 4 then illustrate each element and also can be installed on different housings or be encapsulated in the embodiment combined in disparate modules.

Fig. 5 is the utility model protected effect schematic diagram, power frequency short circuit current is divided into three parts: little power current refers to the current range that thermel protection device can start; Large power frequency short circuit current refers to the current range that overcurrent protective device can start; Marginal, be the power frequency short circuit current action blind area of existing surge protector protective device, be called for short action blind area.

The utility model is for the surge protector in power electronic circuits system and protective device thereof, and this problem of action blind area can be overcome, workflow ideally as shown in Figure 6, namely pass through with magnetic field sensor (6), the protective device that energy conversion device (20) and step electromagnet (11) are core realizes the protection to surge protector internal environment, described protective device mainly comprises break contact (2), tripping mechanism (3), time delay step electromagnet (11), reset switch (4), tablet (5), magnetic field sensor (6), energy conversion device (20), power current inhibitor (7), arc-chute (12), arc extinguishing magnetic blow-out plate (13) and upper terminals (1), lower terminals (8), overcurrent protective device (15) and thermel protection device (16).

Utilize the technical solution of the utility model, reach corresponding technique effect, or not departing from the technical scheme equivalents under design philosophy of the present utility model, all within protection range of the present utility model.

Claims

1. a Novel electric surge protector, comprise lightning protection component, overcurrent protective device, thermel protection device and shell, described lightning protection component and overcurrent protective device series connection, form surge to release path, described thermel protection device is positioned on lightning protection component electrode, it is characterized in that: this Novel electric surge protector also comprises power current inhibitor, magnetic field sensor, energy conversion device, time delay step electromagnet, sensing chip, break contact, flow restricter; Described power current inhibitor is connected on surge and releases on path; Described break contact comprises moving contact and fixed contact; Described magnetic field sensor is placed in surge and releases by path, to release the magnetic direction that path produces perpendicular to surge; Described magnetic field sensor is connected with energy conversion device, and energy conversion device output is connected with time delay step electromagnet, and described time delay step electromagnet controls sensing chip action; Described sensing chip is connected by tripping mechanism with moving contact; Described fixed contact and flow restricter series connection and in parallel with lightning protection component.

2. a kind of Novel electric surge protector according to claim 1, is characterized in that: this Novel electric surge protector can not have overcurrent protective device.

3. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: after described break contact is closed, can not open before overcurrent protective device disconnects again.

4. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described break contact has reset switch.

5. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: the time delay step electromagnet adopting the time difference producing magnetic field according to lightning current and power current to realize parametrization to control, as the foundation of disjunction SPD path.

6. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described time delay step electromagnet controls moving contact action by mechanical linkage.

7. a kind of Novel electric surge protector according to claim 1 and 2; it is characterized in that: described lightning protection component and magnetic field sensor, energy conversion device, power current inhibitor, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, tripping mechanism, break contact; same housing can be positioned at, also can be installed on different housings or be encapsulated in different modules and combine.

8. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: the circuit that described flow restricter can be one of resistance, inductance, electric capacity or be combined by it.

9. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described overcurrent protective device can be fuse or circuit breaker.

10. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described lightning protection component can be piezo-resistance, discharge tube, TVS one or a combination set of.

11. a kind of Novel electric surge protectors according to claim 1 and 2, is characterized in that: described magnetic field sensor and energy conversion device can independently be arranged, and also can adopt the magnetic field sensor with energy conversion device.