CN203086125U

CN203086125U - Novel surge protection device

Info

Publication number: CN203086125U
Application number: CN 201220663311
Authority: CN
Inventors: 孙巍巍
Original assignee: Individual
Current assignee: Tianjin Zhongli Shenzhou Lightning Protection Technology Co ltd
Priority date: 2012-12-05
Filing date: 2012-12-05
Publication date: 2013-07-24
Anticipated expiration: 2022-12-05

Abstract

The utility model relates to a novel surge protection device, mainly comprising a breaking switch, a tripping mechanism, an inertia device, a buffer displacement spring sheet, an electromagnet, a bimetallic strip, a lightning protection element, and upper and lower wiring terminals. The upper wiring terminal is connected in series with the breaking switch, the electromagnet, the lightning protection element, and the lower wiring terminal. The electromagnet can drive the tripping mechanism to act, and the tripping mechanism is equipped with the buffer displacement spring sheet and the inertia device and is guaranteed to act only when a top rod of the electromagnet acts continuously and not to act when the top rod of the electromagnet acts quickly and restores at the moment that lightning current passes through, thereby guaranteeing that the breaking switch can correctly break an SPD fault closed circuit. The temperature of the lightning protection element is transmitted to the bimetallic strip through a heat conducting paster and when the temperature is over high, the bimetallic strip can deform to drive the tripping mechanism to act to break the circuit. The novel surge protection device has a comprehensive lightning protection function and realizes current quick-breaking in the case of industrial frequency short circuits, tripping in the case of overlarge leakage current, and smooth discharging of the lightning current; and the novel surge protection device is convenient in installation and is safe and effective.

Description

A kind of novel surge protector

Technical field

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

Background technology

Thunder and lightning is a kind of special weather phenomenon of aloft being discharged and being caused by charged cloud.Thunder and lightning is the major reason that causes electronic equipment to damage, and it threatens the safe and stable operation of every field electronic informations such as building, railway, civil aviaton, communication, industry control, military affairs.On metallic circuits such as the power line that is connected with electronic equipment, holding wire and control line surge protector (SPD) being installed is one of important measures of lightning protection.Surge protector has been widely used in various fields, has important effect in lightning protection.The quality of its state then directly influences its lightning protection effect, thereby the safety of protection equipment is brought hidden danger.

The backup protection equipment of existing SPD comprises heat protection and overcurrent protective device, and overcurrent protective device adopts fuse or circuit breaker usually.But when power system failure, SPD cross flow short-circuit, power current by the time, its current value might not reach the startup value of overcurrent protective device, overcurrent protective device is failure to actuate; Thermel protection device causes power current to continue to pass through because heat conducting speed limit also is failure to actuate, and SPD is on fire in the lightning protection component heating.If the startup value of overcurrent protective device is selected little, though can start, be difficult to resist the impact of lightning current, cause the SPD lightning current of can't normally releasing.So there is serious blind area in existing overcurrent protective device to the protection of SPD, overcurrent protective device and thermel protection device all are failure to actuate in this zone, can't disjunction SPD fault paths, and the protected equipment of serious threat.

The utility model content

The utility model adopts electromagnet, buffer displacement shell fragment, inertial device and tripping mechanism as overcurrent protective device, solves overcurrent protection protection blind zone problem; Adopt bimetal leaf and tripping mechanism as thermel protection device.Collection lightning protection component, thermel protection device and overcurrent protective device are integrated in one, and residual voltage is lower, improve lightning protection effect, effectively solve the problem that above-mentioned backup protection equipment is failure to actuate.

The utility model is by the following technical solutions: the utility model is the surge protector that is used for the power electronics line system; described surge protector comprises section breaker, tripping mechanism, buffer displacement shell fragment, inertial device, electromagnet, bimetal leaf, lightning protection component and upper and lower terminals; all being arranged in the housing, is the novel surge protector of an integral body.

Described upward terminals and section breaker, electromagnet, lightning protection component, following terminals are connected in series; Electromagnet push rod and bimetal leaf can promote the buffer displacement shell fragment, and the buffer displacement shell fragment is connected with inertial device, and inertial device connects tripping mechanism.

Of the present utility model being characterised in that:

1. this novel surge protector is integrated in one lightning protection component and thermel protection device that is made of bimetal leaf and tripping mechanism and the overcurrent protective device that is made of electromagnet, buffer displacement shell fragment, inertial device and tripping mechanism, and is easy for installation;

2. this novel surge protector efficiently solves the problem of existing overcurrent protective device protection blind area.

3. when lightning protection component deterioration power frequency leakage current reached certain value, the lightning protection component shell temperature also rose to certain altitude, because the intensification that the power frequency leakage current causes is the process of a slow gradual change, can satisfies the distortion of bimetal leaf and cut off the requirement of dangerous SPD path.Bimetal leaf at high temperature is out of shape irrecoverable, can overcome the inertial device effect of inertia, and inertial device is rotated, and drives tripping mechanism.The material of this bimetal leaf, size can according to lightning protection component dangerous temperature value and promote the buffer displacement shell fragment with and the displacement of inertial device motion calculate;

When power system failure, power current flow through, during lightning protection component inefficacy short circuit, electromagnet makes push rod eject under the effect of electromagnetic force, push rod promotes the buffer displacement shell fragment, inertial device can not rotate along buffer displacement shell fragment application of force direction owing to effect of inertia, but this moment, short circuit current did not disappear, and the electromagnet push rod still heads on the buffer displacement shell fragment, behind the wait time-delay Millisecond Δ t, inertial device rotates counterclockwise rapidly, drives trip gear and cuts off the SPD path.

5. when lightning current flow through, the time was very short, and electric current is released rapidly, and the electromagnet push rod ejects again rapidly and recovers, and inertial device can not drive trip gear because effect of inertia keeps motionless state, thereby guaranteed that lightning current releases smoothly.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the principle schematic of the utility model embodiment.

Embodiment

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

As shown in Figure 1, 2, the 1st, last terminals, the 2nd, section breaker, the 3rd, push rod, the 4th, electromagnet, the 5th, following terminals, the 6th, shell, the 7th, lightning protection component, the 8th, heat conduction paster, the 9th, bimetal leaf, the 10th, tripping mechanism, the 11st, inertial device, the 12nd, buffer displacement shell fragment.

The utility model is the surge protector that is used for the power electronics line system, and described surge protector comprises section breaker, tripping mechanism, buffer displacement shell fragment, inertial device, electromagnet, bimetal leaf, lightning protection component and upper and lower terminals.

Described upward terminals (1), section breaker (2), electromagnet (4), lightning protection component (7), following terminals (5) are connected in series.

Described buffer displacement shell fragment (12) is connected with inertial device (11), and inertial device (11) is connected with tripping mechanism (10), control section breaker (2).

Described electromagnet (4) is when the power frequency short circuit current flows through, and push rod (3) keeps the ejection state always, lives buffer displacement shell fragment (12) surely, rotates thereby drive inertial device (11), drives tripping mechanism (10); When lightning current passed through, push rod (3) ejected again rapidly and recovers, and can not drive inertial device (11).

Described bimetal leaf (9) closely links to each other with lightning protection component (7) by heat conduction paster (8), guarantees the transmission of temperature and heat.When lightning protection component (7) deterioration, when the power frequency leakage current reached certain value, temperature also rose to certain altitude, bimetal leaf (9) is distortion slowly, and distortion does not recover promotion buffer displacement shell fragment (12) with the temperature rising, reach overcome inertial device (11) effect of inertia after, start tripping mechanism rapidly.The deflection of this bimetal leaf is relevant with its material, size and variation of temperature, can calculate according to the power and the displacement that overcome inertial device (11) action needs.

Described buffer unit (11) is flying wheel or weight or damping gear or air valve or delay circuit.

Claims

1. a novel surge protector is characterized in that: section breaker, tripping mechanism, buffer displacement shell fragment, inertial device, electromagnet, bimetal leaf, lightning protection component and upper and lower terminals are integrated in one, are loaded on housing; Upper and lower terminals and lightning protection component, electromagnet connect and compose the leakage path of lightning surge; Bimetal leaf links to each other with lightning protection component; The buffer displacement shell fragment links to each other with inertial device, and inertial device links to each other with tripping mechanism, and tripping mechanism drives section breaker.

2. a kind of novel surge protector according to claim 1 is characterized in that: lightning protection component, overcurrent protective device, thermel protection device are integrated in one; Described overcurrent protective device is made up of electromagnet, buffer displacement shell fragment, inertial device and tripping mechanism; Described thermel protection device is made up of bimetal leaf, tripping mechanism.

3. a kind of novel surge protector according to claim 1 is characterized in that: upward terminals, section breaker, electromagnet, lightning protection component, following terminals are connected in series.

4. a kind of novel surge protector according to claim 1 is characterized in that: described inertial device is flying wheel or weight or damping gear or air valve or delay circuit.

5. novel surge protector according to claim 1 is characterized in that: described lightning protection component can be piezo-resistance, inhibition diode, gas discharge tube, discharging gap or this type of non-linear element of controllable silicon.