Utility model content
The purpose of this utility model is to provide a kind of siganl thunder-proof device, for solving the problem of siganl thunder-proof device remote signalling deterioration Real-time Alarm weak effect in prior art.
For achieving the above object, the technical scheme that the utility model proposes is:
A kind of siganl thunder-proof device of the present utility model, comprise an interface, this interface has a remote signalling input and a remote signalling output, this siganl thunder-proof device also comprises: an induction coil and a warning circuit, one end of induction coil is connected with described remote signalling input, the other end is connected with one end of warning circuit, the other end of warning circuit is connected with described remote signalling output, wherein, described warning circuit comprises: one first circuit and the second circuit with this first circuit in parallel, when normal operating conditions, described first circuit pathways, described second circuit open circuit; When deterioration state, described first circuit breaker, described second circuit is high impedance status.
Further, described first circuit comprises a protective tube, and described second circuit comprises one second resistance and one second transient diode with described second resistant series.
Further, this siganl thunder-proof device also comprises one first resistance and one the 3rd resistance, described 3rd resistance is connected between described remote signalling input and described induction coil, described first resistance is connected between described warning circuit and described remote signalling output, to eliminate the coupling of described remote signalling input to described remote signalling output.
Further, this siganl thunder-proof device also comprises one first transient diode, one end of described first transient diode is connected between described 3rd resistance and described induction coil, the other end is connected between described warning circuit and described first resistance, to make to there will not be too high terminal voltage between described remote signalling input and described remote signalling output.
Further, described induction coil is ring current induction coil.
Further, described protective tube is small area analysis protective tube, and current value is 63mA.
Further, described second resistance is high resistance measurement, and resistance value is 330k-1M ohm.
Further, described first, the 3rd resistance is low resistance resistance, and resistance value is 3.3-10 ohm.
Further, described interface is any one of RJ45 interface, RS485 interface, RS232 interface or DB09 interface.
Compared with prior art, a kind of siganl thunder-proof device of the present utility model, there is following beneficial effect: realize remote signalling deterioration Real-time Alarm function by arranging warning circuit, not only cabling is simple, power supply is not needed to power, improve fail safe and reliability, and volume is little, possesses good structure compatibility.
Embodiment
Below with reference to accompanying drawing, elaboration is further given to the utility model.
Refer to Fig. 1, a kind of siganl thunder-proof device that the utility model provides comprises an interface CON2, and this interface CON2 has an a remote signalling input J1 and remote signalling output J2, exports a remote signals for siganl thunder-proof device.This interface CON2 can be any one of RJ45 interface, RS485 interface, RS232 interface or DB09 interface, also can with the remote signalling interface tandem possessing hot dropout principle, and practical function is expanded.
This siganl thunder-proof device also comprises an induction coil L2 and a warning circuit, and this induction coil L2 can be ring current induction coil.One end of induction coil L2 is connected with remote signalling input J1, and the other end is connected with one end of warning circuit, and the other end of warning circuit is connected with remote signalling output J2.Wherein, warning circuit also comprises again one first circuit and the second circuit with this first circuit in parallel, when normal operating conditions, and the first circuit pathways, second circuit is opened a way; When deterioration state, the first circuit breaker, second circuit is high impedance status.
Particularly, the first circuit comprises a protective tube F1, the one second transient diode D2 that second circuit comprises one second resistance R2 and connects with the second resistance R2.Wherein, protective tube F1 is small area analysis protective tube, and current value is 63mA, such as fast fusing type fuse.Second resistance R2 is high resistance measurement, and resistance value is 330k-1M ohm.The voltage range of the second transient diode D2 then depends on the remote signalling voltage range of interface CON2.When normal operating conditions, protective tube F1 is by the second resistance R2 and the second transient diode D2 bypass, make remote signalling output J2, protective tube F1, induction coil L2 and remote signalling input J1 form electric loop, from interface CON2, this electric loop is short-circuit condition; When deterioration state, because thunder-strike current exceeds standard, such as thunder-strike current is greater than maximum nominal current or thunder-strike current is greater than 70% of maximum nominal current, the induced current that induction coil L2 produces will cause protective tube F1 to be fused, the state of interface CON2 is changed, namely from interface CON2, comprise remote signalling output J2, the second transient diode D2, the electric loop of the second resistance R2, induction coil L2 and remote signalling input J1 is open-circuit condition.
Further, siganl thunder-proof device also comprises one the 3rd resistance R3, one first resistance R1 and one first transient diode D1.Wherein, the 3rd resistance R3 and the first resistance R1 is little valued resistor, and resistance value is 3.3-10 ohm.The voltage range of the first transient diode D1 then depends on the remote signalling voltage range of interface CON2.3rd resistance R3 is connected between remote signalling input J1 and induction coil L2; first resistance R1 is connected between warning circuit and remote signalling output J2; for eliminating the coupling of remote signalling input J1 to remote signalling output J2 under instantaneous thunder-strike current; protection interface CON2; simultaneously because the 3rd resistance R3 and the first resistance R1 is little valued resistor, be that short circuit or open-circuit condition can not have an impact for interface CON2.One end of first transient diode D1 is connected between the 3rd resistance R3 and induction coil L2, the other end is connected between warning circuit and the first resistance R1, to make the clamping action due to this first transient diode D1 between remote signalling input J1 and remote signalling output J2, and the voltage of interface CON2 is in a constant range to there will not be too high terminal voltage namely to ensure, the induced current simultaneously produced for induction coil L2 provides loop, to reduce the induced current shunting of remote signalling input J1.
In a preferred embodiment, when normal operating conditions, due to the high resistance measurement that the second resistance R2 is 510k ohm, the ON time of the second transient diode D2 is delayed, also reduce the On current of the second transient diode D2 simultaneously, thus regulate the electric current flowing through protective tube F1, make protective tube F1 can by the second resistance R2 and the second transient diode D2 bypass, i.e. the first circuit pathways, second circuit is under low pressure in open circuit, and then make remote signalling output J2, first resistance R1, protective tube F1, induction coil L2, 3rd resistance R3 and remote signalling input J1 forms electric loop, from interface CON2, this electric loop is short-circuit condition.When deterioration state, because thunder-strike current exceeds standard, namely thunder-strike current is greater than 70% of maximum nominal current, the induced current that induction coil L2 produces will cause protective tube F1 to be fused, i.e. the first circuit breaker, then induced current flows through second circuit, make remote signalling output J2, first resistance R1, second transient diode D2, second resistance R2, induction coil L2 and the 3rd resistance R3 forms electric loop, due to the clamping action of the second transient diode D2, second circuit can be under low pressure high impedance status, namely this electric loop is interdicted by the second transient diode D2, therefore, from interface CON2, this electric loop is open-circuit condition.Meanwhile, the low-voltage supervisory circuit that interface CON2 is external also keeps open-circuit condition.Real-time Alarm during this remote signalling deterioration, make this siganl thunder-proof device when there is deterioration, by the size of the real-time indirect lightning strike electric current of induction coil, in time the state of interface can be changed to open-circuit condition by short-circuit condition, and this state cannot reverse, thus in device context maintenance, there is certain superiority.
In sum, a kind of siganl thunder-proof device of the present utility model realizes remote signalling deterioration Real-time Alarm function by arranging warning circuit, the personnel of maintaining easily carry out safety inspection and the maintenance of siganl thunder-proof device, not only cabling is simple, power supply is not needed to power, conveniently carry out the monitoring of remote signal lightning protection device deterioration state, and apply electromagnetic induction principle and do not possess electrical connection with main protection circuit, export remote signals with isolation method and any interference can not be had to original siganl thunder-proof device interlock circuit, improve fail safe and reliability, and volume is little, possesses good structure compatibility, can the shell of compatible most of siganl thunder-proof device, practical function is expanded.
Foregoing; be only preferred embodiment of the present utility model; not for limiting embodiment of the present utility model; those of ordinary skill in the art are according to central scope of the present utility model and spirit; can carry out corresponding flexible or amendment very easily, therefore protection range of the present utility model should be as the criterion with the protection range required by claims.