CN206226398U

CN206226398U - It is a kind of without ground or zero line open-phase protection and the Contactless contactor of fault alarm

Info

Publication number: CN206226398U
Application number: CN201621341032.9U
Authority: CN
Inventors: 郝敏啟; 魏明宇
Original assignee: XUZHOU HANTONG ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: XUZHOU HANTONG ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2016-12-08
Filing date: 2016-12-08
Publication date: 2017-06-06
Anticipated expiration: 2026-12-08

Abstract

The utility model discloses belong to electrical engineering technical field it is a kind of without ground or zero line open-phase protection and the Contactless contactor of fault alarm.The Contactless contactor is made up of fault monitoring and protection circuit, control circuit, Phototube Coupling, triggers circuit and main circuit；Wherein control circuit is connected with fault monitoring and protection circuit, power supply and triggers circuit；Control circuit is made up of open-phase protection signal conditioning circuit, Phototube Coupling and open-phase protection logic circuit；Triggers circuit connects main circuit.Its signal sampling circuit uses Y type phase line connections；Contactor internal structure " neutral conductor ", open-phase protection signal is exported after being processed by logic circuit；Therefore the utility model has open-phase protection and controllable silicon fault detection capability; power network occur voltage fluctuate 20% interference when Contactless contactor protection be failure to actuate; controllable silicon failure alarm; prevent load from damaging; its fault secure circuit strong interference immunity, it is adaptable to phase three-wire three or three-phase four-wire system switch board.

Description

It is a kind of without ground or zero line open-phase protection and the Contactless contactor of fault alarm

Technical field

The utility model belongs to electrical engineering technical field, more particularly to a kind of open-phase protection and event without ground or zero line Hinder the Contactless contactor of alarm.

Background technology

Contactless contactor substitutes the contact switch of mechanical contactor with IGCT inverse parallel, is not in contact with a little, no Can strike sparks, discharge, not burn the problem broken not open to death, and IGCT is zero cross fired and zero-crossing switching, does not have control coil to send out The problem of heat.Improve the reliability of Contactless contactor.It is applied at present domestic external in electrical engineering project control cabinet The Contactless contactor of product, most without any defencive function, simply switching device, a small number of to carry open-phase protection and controllable silicon failure Being also required to ground wire or zero line and could working for warning function, ground wire or the feelings of zero line are used in special workplace or inconvenience Under condition（Such as in driving）, just there is significant limitation.

Utility model content

The deficiency that the purpose of this utility model is directed to described in prior art provides a kind of phase shortage without ground or zero line and protects The Contactless contactor of shield and fault alarm, it is characterised in that the Contactless contactor is by fault monitoring and protection circuit, control Circuit, Phototube Coupling, triggers circuit and main circuit composition；Wherein control circuit and fault monitoring and protection circuit, power supply and touch Power Generation Road is connected, triggers circuit connection main circuit；The fault monitoring and protection circuit is signal sampling circuit 1, sample of signal R, S, T of the first half of circuit 1 are connected to three rectifications of open-phase protection signal conditioning circuit 2 by three RC parallel circuits respectively One AC end of bridge, another AC ends of three rectifier bridges connect into a node N, as the connection of Y types；The output V+ of rectifier bridge, V-, three rectifier bridges correspond to R, S, T three-phase in open-phase protection signal conditioning circuit 2 respectively；The lower half of signal sampling circuit 1 U, V, W be connected into a node N ' by three RC parallel circuits respectively, as Y types connection；Connected between node N and node N Resistance R7 constructs neutral conductor NN ＇；The control circuit is by open-phase protection signal conditioning circuit 2, Phototube Coupling 5 and open-phase protection Logic circuit 3 is composed in series；Open-phase protection logic circuit 3 is connected with controller 6, and controller 6 connects main electricity by triggers circuit 7 Road 8.

Each phase of the open-phase protection signal conditioning circuit has capacitance-resistance filter and mu balanced circuit, three mu balanced circuits point Not Tong Guo three photoisolators 5 be connected to the 74LS10 modules of open-phase protection logic circuit 3,74LS10 modules are exported by Q1 Transistor output protection signal Uo+, Uo-, connect the control pole and ground of the transistor Q2 of controller 6, the connection triggering electricity of controller 6 The input of road 7, the output connection IGCT control pole of main circuit 8 of triggers circuit 7.

Connection resistance R7 constructs neutral conductor NN ＇ and is connected with signal processing circuit 4 between the node N and node N ', should Signal processing circuit is made up of halfwave rectifier, capacitance-resistance filter, mu balanced circuit and controllable silicon trouble lamp LED2.

The triggers circuit per mutually using two MOC3083 zero cross fired photoelectrical couplers U1, U2 series connection, and with pressing Resistance ensures the safety of series connection optocoupler；Three groups of optocouplers U1, U2 in three-phase loop；U3, U4 and U5, U6 are used and are connected in series, it is ensured that Three groups of six optocouplers outputs are respectively connecting to six IGCT control poles of main circuit 8, make its triggering and conducting simultaneously.

The beneficial effects of the utility model are that the utility model is Contactless contactor without ground wire or zero line；Its feature Y type phase line connections are used including 1) signal sampling circuit；2）Contactor internal structure " neutral conductor ", realizes without ground or zero line In the case of, it is possible to achieve open-phase protection, controllable silicon fault alarm；3）Open-phase protection signal is exported after being processed by logic circuit；4） Controllable silicon fault detection signal through flat ripple, time delay, go interference to process；5）Above-mentioned signal multi step strategy, it is upper and lower that voltage occurs in power network During the interference of floating 20%, not malfunction is protected.Therefore the utility model has open-phase protection and controllable silicon fault detection capability, its Fault secure circuit strong interference immunity, Contactless contactor is failure to actuate during power phase shortage, controllable silicon failure alarm, prevents load Damage；Suitable for phase three-wire three or three-phase four-wire system switch board.

Brief description of the drawings

Fig. 1 is three-phase contactless contactor block diagram.

Fig. 2 is three-phase contactless contactor main circuit schematic diagram.

Fig. 3 is open-phase protection and controllable silicon fault detect physical circuit figure.

Specific embodiment

The utility model provide it is a kind of without ground or zero line open-phase protection and the Contactless contactor of fault alarm, below It is explained with reference to accompanying drawing.

Fig. 1 show three-phase contactless contactor block diagram.The Contactless contactor is by fault monitoring and protection circuit, control Circuit, Phototube Coupling, triggers circuit and main circuit composition；Wherein control circuit and fault monitoring and protection circuit, power supply and touch Power Generation Road is connected, triggers circuit connection main circuit；Wherein fault monitoring and protection circuit is signal sampling circuit,

Fig. 3 is open-phase protection and fault monitoring and protection circuit described in controllable silicon fault detect physical circuit figure for signal takes Sample circuit 1, R, S, T of the first half of signal sampling circuit 1 are connected to open-phase protection signal and adjust by three RC parallel circuits respectively Three rectifier bridge AC ends of circuit 2 are managed, another AC ends of three rectifier bridges connect into a node N, connected as Y types Connect；Output V+, V- of rectifier bridge, three rectifier bridges correspond to R, S, T three-phase in open-phase protection signal conditioning circuit 2 respectively；Letter U, V, W of the lower half of number sample circuit 1 are connected into a node N ' by three RC parallel circuits respectively, as the connection of Y types； Resistance R7 is connected between node N and node N and constructs neutral conductor NN ＇；Neutral conductor NN ＇ are connected with signal processing circuit 4, the letter Number process circuit is made up of halfwave rectifier, capacitance-resistance filter, mu balanced circuit and controllable silicon trouble lamp LED2.

The control circuit is connected by open-phase protection signal conditioning circuit 2, Phototube Coupling 5 and open-phase protection logic circuit 3 Composition；Each phase of the open-phase protection signal conditioning circuit 2 has capacitance-resistance filter and mu balanced circuit, three mu balanced circuit difference The 74LS10 modules of open-phase protection logic circuit 3 are connected to by three photoisolators 5, the output of 74LS10 modules is brilliant by Q1 Body pipe output protection signal Uo+, Uo-, are connected to the control pole and ground of the transistor Q2 of controller 6.

It is three-phase contactless contactor main circuit schematic diagram shown in Fig. 2.The connection of controller 6 input of triggers circuit 7 in figure, The output connection IGCT control pole of main circuit 8 of triggers circuit 7.Triggers circuit is per mutually using two MOC3083 zero cross fired photoelectricity Coupler U1, U2 are connected, and the safety of series connection optocoupler is ensured with equalizing resistance；Three groups of optocouplers U1, U2 in three-phase loop；U3、 U4 and U5, U6 are used and are connected in series, it is ensured that three groups of six optocouplers outputs are respectively connecting to six IGCTs control of main circuit 8 Pole, makes its triggering and conducting simultaneously.

Because six optocouplers are connected in series, the triggering in parallel of the control signal voltage ratio of Contactless contactor it is much higher, prevent Contactless contactor is stopped because disturbing the possibility of false triggering；Triggers circuit 6 is current constant control, and the input current for flowing through optocoupler is permanent It is fixed, constant current by transistor Q2 control pole, emitter resistance determines；As shown in Fig. 2 the R of main circuit connection power supply, S, T three-phase input, the output of U, V, W three-phase；Its each phase is constituted with two IGCT inverse parallels, in order to prevent IGCT from damaging It is bad, add R, C resistance capaciting absorpting circuit at antiparallel IGCT two ends.

Operation principle of the present utility model is signal sampling circuit 1 in Fig. 3 to be switched to high pressure to send into phase shortage after low pressure and protects Shield signal conditioning circuit 2 and signal processing circuit 4, two parts up and down of signal sampling circuit 1 are the connection of Y types, the connection of Y types Resistance R7 is connected between two node N and node N ' and constructs neutral conductor NN ＇；Open-phase protection signal conditioning circuit 2 will be treated Signal again by being exported after the optocoupler of photoisolator 5, it is defeated when voltage ripple of power network (such as line voltage fluctuate 20%) It is the signal stabilization that goes out, unaffected, it is achieved thereby that when using open-phase protection, controllable silicon fault alarm Contactless contactor without Need the purpose of ground or zero line；Specifically include：

1. in open-phase protection logic circuit 3, if not phase shortage, 74LS10 output low levels, phase shortage alarm lamp LED1 is not Bright, Q1 does not work, unprotect signal output, and now the constant source flowing transistor Q2 of controller 6 is working properly, is touched to triggers circuit 7 Signal, triggers circuit 7 receives trigger signal, the normal work of major loop 8.If phase shortage, it is assumed that R phase phase shortages, corresponding R phases nothing Optocoupler output signal, the non-output signal of photoisolator 5 of R phases, corresponding S, T-phase photoisolator 5 have output signal, then and three Road signal sends into the 74LS10 modules of open-phase protection logic circuit 3, and high level, phase shortage alarm lamp are exported after 74LS10 logic judgments LED1 is bright, Q1 conducting output protection signal Uo+, Uo-, and the constant source flowing transistor Q2 control electrode potentials of controller 6 are pulled down to Ground, therefore constant source flowing transistor Q2 cut-offs, the Triggerless of triggers circuit 7, major loop 8 are stopped, and protect major loop brilliant Brake tube；Lack two-phase, during three-phase similarly.

2. when controllable silicon is faulty, not to control signal, the three characteristics of the middle term is uneven, then have electric current and flow through NN ＇, and generation can Control silicon fault-signal, the signal is by after rectification, flat ripple, the voltage stabilizing of signal processing circuit 4, making controllable silicon trouble lamp LED2 Light alarm.

Claims

1. it is a kind of without ground or zero line open-phase protection and the Contactless contactor of fault alarm, it is characterised in that this is contactless Contactor is made up of fault monitoring and protection circuit, control circuit, Phototube Coupling, triggers circuit and main circuit；Wherein control electricity Road is connected with fault monitoring and protection circuit, power supply and triggers circuit, triggers circuit connection main circuit；The fault detect and guarantor Protection circuit is signal sampling circuit（1）, signal sampling circuit（1）The first half R, S, T respectively pass through three RC parallel circuits It is connected to open-phase protection signal conditioning circuit（2）Three rectifier bridge AC ends, another AC ends of three rectifier bridges connect into One node N, as the connection of Y types；Output V+, V- of rectifier bridge, three rectifier bridges correspond to open-phase protection signal condition electricity respectively Road（2）In R, S, T three-phase；Signal sampling circuit（1）U, V, W of lower half be connected into one by three RC parallel circuits respectively Individual node N ', as the connection of Y types；Resistance R7 is connected between node N and node N and constructs neutral conductor NN ＇；The control circuit By open-phase protection signal conditioning circuit（2）, Phototube Coupling（5）With open-phase protection logic circuit（3）It is composed in series；Open-phase protection is patrolled Collect circuit（3）With controller（6）Connection, controller（6）By triggers circuit（7）Connection main circuit（8）.

2. according to claim 1 without ground or the open-phase protection and the Contactless contactor of fault alarm of zero line, its feature It is, the open-phase protection signal conditioning circuit（2）Each phase have capacitance-resistance filter and a mu balanced circuit, three mu balanced circuits point Tong Guo not three photoisolators（5）It is connected to open-phase protection logic circuit（3）74LS10 modules, 74LS10 modules output warp Q1 transistor output protection signal Uo+, Uo- are crossed, controller is connected（6）Transistor Q2 control pole and ground, controller（6）Even Contact Power Generation Road（7）Input, triggers circuit（7）Output connection main circuit（8）IGCT control pole.

3. according to claim 1 without ground or the open-phase protection and the Contactless contactor of fault alarm of zero line, its feature It is resistance R7 to be connected between the node N and node N ' and constructs neutral conductor NN ＇ and signal processing circuit（4）Connection, the letter Number process circuit is made up of halfwave rectifier, capacitance-resistance filter, mu balanced circuit and controllable silicon trouble lamp LED2.

4. according to claim 2 without ground or the open-phase protection and the Contactless contactor of fault alarm of zero line, its feature It is that the triggers circuit is connected per phase using two MOC3083 zero cross fired photoelectrical couplers U1, U2, and with equal piezoelectricity Resistance ensures the safety of series connection optocoupler；Three groups of optocouplers U1, U2 in three-phase loop；U3, U4 and U5, U6 are used and are connected in series, it is ensured that three Six optocoupler outputs of group are respectively connecting to main circuit（8）Six IGCT control poles, make its simultaneously triggering and conducting.