CN204391705U - A kind of Novel electric surge protector - Google Patents

Abstract

The utility model relates to a kind of Novel electric surge protector, mainly comprises lightning protection component, temperature sensor, overcurrent protective device thermel protection device, flow restricter, time delay step electromagnet, sensing chip, break contact, arc-chute, arc extinguishing magnetic blow-out plate and upper and lower terminals; Thermel protection device is positioned on lightning protection component electrode, and lightning protection component and overcurrent protective device series connection, form surge and to release path, temperature sensor is placed in by lightning protection component, and is connected with time delay step electromagnet.Temperature sensor in the utility model can sense the temperature of lightning protection component and temperature information is converted into current information; introduce time delay step electromagnet; after time delay step electromagnet passes into power current; cause 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) anxious brush ramp case 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, and described surge protector mainly comprises lightning protection component, power current inhibitor, temperature sensor, 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 temperature sensor comprises two types, and be respectively contact and contactless, its output is connected with time delay 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.

The wire that in the utility model, the thermometric object of temperature sensor can be released on path for surge, also can be lightning protection component, the temperature information that temperature sensor is responded to is converted into current information, the temporal difference of signal heat production that described time delay step electromagnet can be exported respectively by temperature sensor senses lightning current and power current is as the foundation of disjunction SPD path, realize a kind of parametrization to control, power current is the periodic wave of Millisecond, time delay step electromagnet can through pulse number stepping, quick-action after Millisecond time delay, promote tablet, drive tripping mechanism, disjunction SPD path, play a protective role, 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, the utility model is by reset switch hand-reset simultaneously, described 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, by temperature sensor senses to temperature signal be converted to electric signal transmission after treatment to time delay step electromagnet, but lightning current is fast-changing Microsecond grade pulse, time delay step electromagnet can not complete pulse number stepping, 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 in protective device 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; Now power current is the periodic wave of Millisecond; the quick-action after pulse number stepping, Millisecond time delay of time delay step electromagnet; promote tablet; drive tripping mechanism; closed break contact, conducting bypass, directly introduces overcurrent protective device by power current; thus cut off SPD path, surge path of releasing is played a protective role.

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, and bypass is composed in series by break contact, flow restricter; Described moving contact is controlled by tripping mechanism, and tripping mechanism controls by time delay step electromagnet, and the current source on time delay step electromagnet is in temperature sensor.

2. the lightning protection component of this Novel electric surge protector, temperature sensor, overcurrent protective device, power current inhibitor, thermel protection device, flow restricter, time delay step electromagnet, break contact, tripping mechanism 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. the temperature sensor of this Novel electric surge protector can be contact type temperature sensor, also can be non-contact temperature sensor, the wire that its detected object can be released on path for surge, also can be lightning protection component.

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 temperature sensors, and 7 is power current inhibitor; 8 is lower terminals, and 9 is shells, and 10 is lightning protection components; 11 is time delay step electromagnets, and 12 is arc-chutes, and 13 is arc extinguishing magnetic blow-out plates; 14 is flow restricters, and 15 is overcurrent protective devices, and 16 is thermel protection devices; 17 is bypass, and 18 is moving contacts, and 19 is fixed contacts.

Fig. 1 is the structural representation of the utility model first embodiment, and described upper terminals (1), power current inhibitor (7), lightning protection component (10), overcurrent protective device (15), thermel protection device (16), 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 electrode pin place, and when there being less power current to flow through lightning protection component, thermel protection device 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 temperature sensor (6) can the temperature of induction temperature sensing object, and temperature information is converted into current information and is transferred to time delay step electromagnet (11), described temperature sensor (6) comprises contact type temperature sensor, as: bimetal thermometer, thermoelectric couple, gas thermometer etc., also non-contact temperature sensor is comprised, as: infrared sensor, microwave remote sensor etc.The position of described temperature sensor (6) is with change changeableization of thermometric mode and thermometric object.Only giving thermometric object at this is lightning protection component, and thermometric mode is contactless structure chart, schematic diagram.

Described reset switch (4) closes when moving contact (18) and fixed contact (19), namely surge releases path when being shorted, reset manually by reset switch (4), make surge path recovery of releasing through-flow, thus make unspoiled SPD again take back circuit.

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 and fixed contact close.

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, protection lightning protection component.

Fig. 2 is the schematic diagram of the first embodiment, namely when power current flows through lightning protection component (10), temperature sensor (6) records corresponding variations in temperature, again corresponding current information is transferred to time delay step electromagnet (11), trigger the mechanical linkage of tripping mechanism (3), closed break contact (2), conducting bypass (17), realizes surge and releases path from the disengaging operating circuit.

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 temperature sensor (6), power current inhibitor (7), time delay step electromagnet (11), tablet (5), tripping mechanism (3).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 main circuit.

Fig. 4 is the schematic diagram of the 3rd embodiment of the present utility model; in the practical application of surge protector; the situation that described lightning protection component (10) and temperature sensor (6), 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) are installed on different housings may be there is; only list wherein a kind of fundamental diagram 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 by the protection of protective device realization to surge protector internal environment that be core with temperature sensor (6) and step electromagnet (11), described protective device mainly comprises break contact (2), tripping mechanism (3), reset switch (4), tablet (5), temperature sensor (6), power current inhibitor (7), time delay step electromagnet (11), arc-chute (12), arc extinguishing magnetic blow-out plate (13), 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 (11)

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, temperature sensor, time delay step electromagnet, sensing chip, break contact, flow restricter, tripping mechanism; Described power current inhibitor is connected on surge and releases on path; Described break contact comprises moving contact and fixed contact; The output of described temperature sensor is connected with time delay step electromagnet input; 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 moving contact and fixed contact close, 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: time delay step electromagnet adopts the time difference of lightning current and power current to control, as the foundation of disjunction SPD path to realize parametrization.

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 temperature sensor, overcurrent protective device, thermel protection device, power current inhibitor, flow restricter, time delay step electromagnet, electromagnetism actuating mechanism, break contact, tripping mechanism; 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; it is characterized in that: the thermometric object of described temperature sensor transducer can be lightning protection component; also can be the wire that surge is released on path; described temperature sensor comprises noncontact and contacts two types, is arranged on surface or the side of thermometric object according to characteristic difference.