CN201750099U

CN201750099U - Outdoor lightning protection power distribution box

Info

Publication number: CN201750099U
Application number: CN2010201557522U
Authority: CN
Inventors: 曾庆林
Original assignee: 曾庆林
Priority date: 2010-04-08
Filing date: 2010-04-08
Publication date: 2011-02-16
Anticipated expiration: 2020-04-08

Abstract

The utility model relates to an outdoor lightning protection power distribution box which comprises a box body, an input terminal, an output terminal and an air switch, wherein a metal clamp plate which is conveniently installed and fixed on a steel strand or a grounding downlead is arranged above a top plate of the box body; the metal clamp plate consists of a lower fixed seat and an upper movable fastening clamp plate which are provided with slotted holes, and a fastening bolt; the box body is internally provided with the air switch and a surge protection device; the wall of the box body is provided with a power input terminal and a power output terminal; the input terminal is connected with an input end of the air switch by a lead, and the output terminal is connected with output ends of the air switch by leads; and the surge protection device is connected between the output ends of the air switch in parallel. The outdoor lightning protection power distribution box selects the small-sized high-interrupt type air switch or a RT18 fuse base, and can enhance safety protection for power distribution in a wired network, thus guaranteeing the safety of engineering technical personnel when in hot-line work; and the outdoor lightning protection power distribution box selects the high-quality surge protection device in a combining way, thus being capable of clamping down transient overvoltage in an electric power circuit, protecting equipment from being damaged by overvoltage such as thunder, lightning and the like, and improving the safety stability of the network.

Description

Outdoor lightning protection block terminal

[technical field] the utility model relates to a kind of block terminal, specifically is a kind of outdoor lightning protection block terminal.

[background technology] is in all parts of the country in solving cable TV network, to all needing to be equipped with the block terminal of transition high pressure such as anti-thunder and lightning and industrial surge in the engineerings such as fiber platform, amplifier, loop, in order to carry out safeguard protection.When actual design is installed in national many wired city TV network at present generally is that attaching plug is cut off, and inserts in the distribution line of electric power with aluminium core RVV then; Fiber platform etc. are also just used the iron-clad chest when mounted, are equipped with air switch socket etc. again, all are not equipped with anti-lightning strike parts basically.Meet thunder and lightning diastrous weather electrical appliance and often broken, the attendant is hurried all be too busy to do it, therefore can bring serious economy loss, also bring many troubles to the user to enterprise.Safeguard the attendant in addition, more want hot line job unavoidably in the exchange device, bring many unsafe factors, increased maintenance difficulties to engineers and technicians.

[background technology] for overcoming the above-mentioned defective of existing outdoor electricity distribution box, this practicality provides a kind of novel outdoor lightning protection block terminal, damages the safety utilization of electric power of protection electrical appliance and attendant's safety with the thunder and lightning that exempts from of protecting electrical appliance.

For solving its technical problem, the technical solution adopted in the utility model is: the outdoor lightning protection block terminal of designing, comprise box body, input terminal, lead-out terminal and air switch, its feature is: 1. box body top board top is provided with and conveniently is fixed on the steel strand wire or the metal splint of down conductor, and this metal splint is made up of the lower fixed seat in trough of belt hole and the last movable binding clip and the fastening Luo bolt in trough of belt hole; 2. in box body, be provided with air switch and surge protector; Be provided with power input terminal and lead-out terminal on the body wall of box body, input terminal links to each other with the input of air switch by lead, and lead-out terminal links to each other with the output of air switch by lead, is parallel with surge protector between the output of air switch.3. described surge protector adopts modularized design; the L end of surge protector is that the live wire end links to each other with the live wire output of air switch; N end is that zero line side is connected with the output zero line side of air switch, wherein ground terminal also be fastened on box body on metal splint be connected, be convenient to installation and maintenance.

Operation principle of the present utility model is: under power supply normal transmission situation, the surge protector in the box body is high-impedance state over the ground, promptly is in open-circuit condition between transmission line and the ground, normal distribution is reached normally move without any influence.When causing the moment overvoltage because of reasons such as lightning wave, industrial surge voltage and transition high pressure on the power transmission line; surge protector is at the utmost point of 25ns admittance over the ground rapidly in the short time in the box body; being low resistive state releases the overvoltage pulse ripple and neutralizes into the earth; the power supply transmission line overvoltage is clamped in the safety value that power consumption equipment can bear; make protected electronic equipment exempt from the impact of high voltage surge and damage; after thunder-strike current; surge protector reverts to high-impedance state over the ground again rapidly, makes the line voltage distribution protection under normal condition.

Compared with prior art, the following beneficial effect of the utility model:

1, selects small-sized high breaking type air switch or RT18 type Insurance Block for use because of the utility model, to the protection that can tighten security of the distribution in the cable network, can guarantee the safety of engineers and technicians' hot line job, in conjunction with selecting high-quality surge protector for use, can be clamped down on the transient overvoltage in the power circuit, make equipment avoid suffering overvoltage and damage;

2, because of after using this reality novel, even can significantly reduce thunderbolt or industrial surge voltage to the destruction of power consumption equipment just in case have destroy change also very convenient, therefore maintenance is significantly reduced, can save lot of manpower and material resources, improve the safety and stability degree and the running quality of network.

[description of drawings] further specifies the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is the utility model structural representation front view.

Fig. 2 is a structural representation left view of the present utility model.

Among the figure: 1 box body, 2 surge protectors, 3 times metal holders, live metal strap on 4,5 tightly because of screw, 6 air switches or (RT18 type fuse), 7 power input terminals, 8 power output terminals, 9 tray cover, 10U type or semicircle slotted eye.

[embodiment] is with reference to accompanying drawing: be fixed with on the top board of the box body 1 of sealing by metal holder 3 down; the metal splint that last live metal strap 4 and firm screw 5 thereof are formed; in order on the steel strand wire that are fastened on electric pole or on the wall earth connection of resident's corridor; the center, intersection of this holder and ambulatory splint respectively is provided with a U type or semicircular slotted eye 10; be provided with a tray cover 9 in the front of box body; side in box body is fixed with an air switch 6 by guide rail; opposite side is fixed with surge protector 2; on the body wall of box body one side, be provided with power input terminal 7; establish power output terminal 8 on the base plate of box body; the fire of air switch wherein; reset terminal respectively with the live wire of outside line; zero line is connected; the output of air switch respectively and the L end and the N that connect surge protector hold; and hold with the L of lead-out terminal 8 end and N and to be connected; give protected electrical appliance with power supply; the earth terminal of surge protector be fastened on the box body=by metal holder 3 down; the metal clip that last ambulatory splint 4 and firm screw 5 thereof are formed is connected; metal clip can be fastened on the outdoor steel strand wire or on the ground lead of resident family, so that release lightning surge electric current or industrial surge current.The used air switch of present embodiment is selected De Lixi high breaking type air switch for use; surge protector is selected high-quality lightning-protection module for use; after testing: maximum Uc Uc=385v; protect horizontal Up＜1.5Kv; nominal discharge current In (8/20 μ s) KA=20; maximum Imax (the 8/20 μ s) KA=40 that releases; leakage current 75%Uc Im＜20 μ A; response time is smaller or equal to 25ns; compound mode is 2P; max-reserved fuse intensity/sky is opened and is 80AgL/16A; earth electrode length 1.2-1.5 rice; adopt the reinforcing bar circle bar of diameter 16mm, all meet standard GB 50343h and IEC61643-1, be fit to cable television network; fiber platform; amplifier and loop etc. need to use on the equipment of distribution.

Claims

1. outdoor lightning protection block terminal, comprise box body, input terminal, lead-out terminal and air switch, it is characterized in that: be provided with above the box body top board and conveniently be fixed on the steel strand wire or the metal splint of down conductor, this metal splint is made up of the lower fixed seat in trough of belt hole and the last movable binding clip and the fastening Luo bolt in trough of belt hole.

2. outdoor lightning protection block terminal according to claim 1 is characterized in that: be provided with air switch and surge protector in box body; Be provided with power input terminal and lead-out terminal on box wall, input terminal links to each other with the input of air switch by lead, and lead-out terminal links to each other with the output of air switch by lead, is parallel with surge protector between the output of air switch.

3. outdoor lightning protection block terminal according to claim 1 and 2; it is characterized in that: described surge protector adopts modularized design; the L end of surge protector is that the live wire end links to each other with the live wire output of air switch; N end is that zero line side is connected with the output zero line side of air switch, wherein ground terminal also be fastened on housing on metal splint be connected.