CN206283251U - Isolated form network signal surge protector - Google Patents

Abstract

Isolated form network signal Surge Protector; including the first input end, the first primary transformer coil, the second primary transformer coil and the second input that are sequentially connected in series; isolated form network signal Surge Protector also includes the first output end, the first choke coil, the first secondary transformer coil, second subprime transformer coil, the second choke coil and the second output end that are sequentially connected in series; first primary transformer coil and the second primary transformer coil are wrapped on transformer core, and the first choke coil, the second choke coil are wrapped on choke coil magnet core；First input end is connected with the first end of gas-discharge tube, and the second input is connected with the second end of gas-discharge tube.The utility model combines gas-discharge tube, TVS and isolation module, the differential signal of first, second input can be coupled with differential mode coupling coil by electromagnetic conversion by transformer, filtered to first, second output end, can released surge energy in input end again.

Description

Isolated form network signal Surge Protector

Technical field

The utility model is related to circuit protection technical field, more particularly to a kind of isolated form network signal Surge Protector.

Background technology

In the prior art, direct-passing mode, and input are used between the input and output end of network signal Surge Protector End is generally resistance or inductance with the decoupling component of output end, and this mode protecting effect is poor, more than level of protection up to More than 600V, and force to carry out the mutual transmission of ground potential between input and output end.

Utility model content

The utility model provides a kind of isolated form network signal Surge Protector, is imitated with solving protection water in the prior art It is really poor, force between input and output end to carry out the problem of ground potential transmission.

To solve the above problems, as one side of the present utility model, there is provided a kind of isolated form network signal surge Protector, including first input end, the first primary transformer coil, the second primary transformer coil and second defeated being sequentially connected in series Enter end, isolated form network signal Surge Protector also includes the first output end, the first choke coil, the first time that are sequentially connected in series Level transformer coil, second subprime transformer coil, the second choke coil and the second output end, the first primary transformer coil And second primary transformer coil be wrapped on transformer core, the first choke coil, the second choke coil are wrapped in and grip On stream circle magnetic core；Isolated form network signal Surge Protector also includes the first tap line and the second tap line, the first tap line One end connects with one end being connected with the second primary transformer coil of the first primary transformer coil, one end of the second tap line Connected with one end being connected with second subprime transformer coil of the first secondary transformer coil；The first input end and gas The first end connection of discharge tube, second input is connected with the second end of gas-discharge tube, and the gas-discharge tube 3rd end is connected with protecting field；The other end of first tap line is connected by Transient Suppression Diode with protecting field；It is described The other end ground connection of the second tap line.

The utility model combines gas-discharge tube, TVS and isolation module, can be by transformer by first, The differential signal of two inputs differential mode coupling coil is coupled by electromagnetic conversion, filtered to first, second output end, again can be with Released surge energy in input end.

Brief description of the drawings

Fig. 1 schematically shows electrical block diagram of the present utility model.

Reference in figure：1st, first input end；2nd, the second input；3rd, the first primary transformer coil；4th, at the beginning of second Level transformer coil；5th, the first secondary transformer coil；6th, second subprime transformer coil；7th, the first choke coil；8th, Two choke coils；9th, the first output end；10th, the second output end；11st, transformer core；12nd, choke coil magnet core；13rd, first take out Head line；14th, the second tap line.

Specific embodiment

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

The utility model provides a kind of isolated form network signal Surge Protector, including the first input end being sequentially connected in series 1st, the first primary transformer coil 3, the second primary transformer coil 4 and the second input 2, isolated form network signal surge protection Device also includes that the first output end 9 being sequentially connected in series, the first choke coil 7, the first secondary transformer coil 5, second subprime become Transformer coil 6, the second choke coil 8 and the second output end 10, the first primary transformer coil 3 and the second primary transformers line Circle 4 is wrapped on transformer core 11, and the first choke coil 7, the second choke coil 8 are wrapped on choke coil magnet core 12. Wherein, the first primary transformer coil 3, the second primary transformer coil 4, the first secondary transformer coil 5, second subprime transformation Device coil 6 and transformer core 11 are constituted for the transformer by high-frequency digital signal, and the first choke coil 7, second are gripped Stream turn coil 8, the second output end 10 and choke coil magnet core 12 constitute isolation module.

Isolated form network signal Surge Protector also includes the first tap line 13 and the second tap line 14, the first tap line 13 One end and the first primary transformer coil 3 the one end being connected with the second primary transformer coil 4 connection, the second tap line 14 One end being connected with second subprime transformer coil 6 of one end and the first secondary transformer coil 5 connect.

The first input end 1 is connected with the first end of gas-discharge tube G, second input 2 and gas-discharge tube G The connection of the second end, and the 3rd end of the gas-discharge tube G is connected with protecting field PE；The other end of first tap line 13 It is connected with protecting field PE by Transient Suppression Diode TVS；The other end ground connection GND of second tap line 14.

The utility model combines GDT (gas-discharge tube), TVS and isolation module, therefore can be by transformer The differential signal of first, second input is coupled with differential mode coupling coil by electromagnetic conversion, is filtered to first, second output End, can release surge energy (conventional surge protector working method) in input end again.

Therefore, do not have physically between first, second input and first, second output end it is direct electrically connect, but may be used Transmission high-frequency signal, so that the low frequency component (i.e. surging signal) in having separated signal；Additionally, common mode choke (high impedance) meeting Surge of further decaying disturbs energy in the line but does not interfere with the transmission of high-frequency digital signal；Due to isolation module The current potential transitive relation between first, second input and first, second output end, therefore the utility model can effectively be separated Allow to be respectively connected in the earthed system of different potentials between its first, second input and first, second output end.

Compared with prior art, first, second input of the present utility model and first, second output end electrically every From setting, effectively level of protection can be reduced within 200V, and first, second input and first, second output end Between no longer transmit ground potential relation.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims (1)

1. a kind of isolated form network signal Surge Protector, it is characterised in that including the first input end (1), that are sequentially connected in series One primary transformer coil (3), the second primary transformer coil (4) and the second input (2), the isolated form network signal wave Surge protector also includes the first output end (9), the first choke coil (7), the first secondary transformer coil that are sequentially connected in series (5), second subprime transformer coil (6), the second choke coil (8) and the second output end (10), the described first primary transformation Device coil (3) and second primary transformer coil (4) are wrapped on transformer core (11), first choke coil (7), the second choke coil (8) is wrapped on choke coil magnet core (12)；

The isolated form network signal Surge Protector also includes the first tap line (13) and the second tap line (14), described first One end of tap line (13) is connected with first primary transformer coil (3) with second primary transformer coil (4) One end connection, one end of second tap line (14) and first secondary transformer coil (5) with described second One end connection of level transformer coil (6) connection；

The first input end (1) is connected with the first end of gas-discharge tube (G), second input (2) and gas discharge The second end connection of (G) is managed, and the 3rd end of the gas-discharge tube (G) is connected with protecting field (PE)；

The other end of first tap line (13) is connected by Transient Suppression Diode (TVS) with protecting field (PE)；

The other end ground connection of second tap line (14).