CN204231313U - A kind of solid-state relay observation circuit - Google Patents
A kind of solid-state relay observation circuit Download PDFInfo
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- CN204231313U CN204231313U CN201420663726.9U CN201420663726U CN204231313U CN 204231313 U CN204231313 U CN 204231313U CN 201420663726 U CN201420663726 U CN 201420663726U CN 204231313 U CN204231313 U CN 204231313U
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- state relay
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Abstract
The utility model discloses a kind of solid-state relay observation circuit, in the trigger control circuit of solid-state relay, if two parallel circuitss, its first parallel circuits establishes the coil of relay K 1; Second parallel circuits arranges resistance and capacitor by the direction of positive best negative pole; Be arranged in parallel a circuit with capacitor, this circuit is arranged in series the normally closed interlock of relay K 1 and the coil of relay K 2; Observation circuit arranges breakdown protection circuit, and this circuit is arranged in series the normally open contact of relay K 2, each normally open contact of electrical appliance relay, the coil of protection relay; On the control circuit of contactor, the auxiliary normally open contact of contactor and the coil of protection relay that are connected in series are set.Adopt technique scheme, by traditional devices and SSR combination, realize SSR on-line monitoring and protection, SSR device puncture out of control after, effectively by electric loop reliable turn-off, the generation of accident can be avoided.
Description
Technical field
The utility model belongs to the technical field of industrial electrical installation, relates to the control circuit of solid-state relay, and more particularly, the utility model relates to a kind of solid-state relay observation circuit.
Background technology
Solid-state relay (English name is Solid State Relay, is called for short SSR) is also referred to as noncontacting switch.It replaces tradition to have contact relay, contactor, as the noncontacting switch device in switching device shifter with relay characteristic with semiconductor device.This device has been widely used in the equipment such as computer external interface arrangement, electric heating constant temperature system, numerical controlled machinery, industrial automation arrangement at present.In addition, need there is a large amount of use in explosion-proof, moistureproof, anticorrosion occasion in chemical industry, colliery etc.
Although solid-state relay has contactless, no-spark, noiselessness and controls the incomparable advantage of many traditional devices such as power is little, its overvoltage, conveyance capacity are poor, can not be ignored also disadvantages such as responsive to temperatures.When particularly applying in high-power heating circuit, puncture or soft breakdown damage once device, whole circuit will be in runaway condition.Very serious consequence will be there is in heating element when lacking effective protection.
Such as in metallurgical casting industry, in the triethylamine generator that sand mold manufacturing equipment is supporting, just employ solid-state relay (SSR) in a large number.In this equipment, triethylamine liquid material adds after in retort and will be heated to 60 degrees centigrade.If but added thermal runaway, the danger of blast will be caused.
Utility model content
The utility model provides a kind of solid-state relay observation circuit, its objective is the danger avoiding solid-state relay to puncture causing.
To achieve these goals, the technical scheme that the utility model is taked is:
Solid-state relay observation circuit of the present utility model, described solid-state relay is arranged on the circuit between the contactor of industrial electrical installation and electrical appliance;
In the trigger control circuit of described solid-state relay, if two parallel circuitss, that is: from power end, be followed successively by: the first parallel circuits establishes the coil of relay K 1; Second parallel circuits arranges resistance and capacitor by the direction of positive best negative pole;
Be arranged in parallel a circuit with capacitor, this circuit is arranged in series the normally closed interlock of relay K 1 and the coil of relay K 2;
Described observation circuit arranges breakdown protection circuit, and this circuit is arranged in series the normally open contact of relay K 2, each normally open contact of electrical appliance relay, the coil of protection relay;
On the control circuit of described contactor, the auxiliary normally open contact of described contactor and the coil of protection relay that are connected in series are set.
The normally open contact of described each electrical appliance relay is arranged in parallel.
The electrical appliance of coil respectively described in each of described each electrical appliance relay is connected in parallel.
Described electrical appliance is electric heater.
On the cathode circuit of the trigger control circuit of described solid-state relay, diode is set, between the first parallel circuits and the second parallel circuits, its conducting direction for from positive pole point to described in solid-state relay.
On the cathode circuit of the trigger control circuit of described solid-state relay, diode is set, between the second parallel circuits and solid-state relay, its conducting direction for from positive pole point to described in solid-state relay.
On the control circuit of described contactor, reset button is set; The auxiliary normally open contact of described reset button and contactor and the coils from parallel connection of coils of protection relay.
The control circuit of described contactor is 220V alternating current circuit.
The trigger control circuit of described solid-state relay is 24V DC circuit.
Described breakdown protection circuit is 24V DC circuit.
The utility model adopt technique scheme, by traditional devices and SSR combination, realize SSR on-line monitoring and protection, SSR device puncture out of control after, effectively by electric loop reliable turn-off, the generation of accident can be avoided.
Accompanying drawing explanation
Below the content expressed by each width accompanying drawing of this specification and the mark in figure are briefly described:
Fig. 1 is main circuit schematic diagram of the present utility model;
Fig. 2 is that contactor resets and the schematic diagram that switches off control circuit;
Fig. 3 is SSR control circuit schematic diagram;
Fig. 4 is breakdown protection circuit schematic diagram.
Be labeled as in figure:
1, solid-state relay, 2, contactor, 3, electrical appliance; 4, relay K 1,5, resistance, 6, capacitor; 7, relay K 2,8, electrical appliance relay (K3), 9, electrical appliance relay (K4); 10, electrical appliance relay (K5); 11, protection relay, 12, reset button, 13, diode; 14, diode, 15, fuse.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present utility model, technical scheme.
Circuit as shown in Figures 1 to 4, it is the utility model solid-state relay observation circuit, described solid-state relay 1 (SSR) is arranged on the circuit between the contactor 2 of industrial electrical installation and electrical appliance 3, by triggering signal, makes main circuit conducting or judgement.Install contactor 2 (KM) in SSR upper end additional, to be used for when SSR punctures reliable turn-off heating major loop.
As shown in Figure 1, on the main circuit, be also provided with fuse 15, realize short-circuit protection.Described fuse 15 is a kind of fast acting fuses.
In order to solve prior art Problems existing and overcome its defect, realize the goal of the invention of the danger avoiding solid-state relay to puncture causing, the technical scheme that the utility model is taked is:
As shown in Figures 1 to 4, solid-state relay observation circuit of the present utility model is in the trigger control circuit of described solid-state relay, if two parallel circuitss, that is: from power end, is followed successively by: the first parallel circuits establishes the coil of relay K 1; Second parallel circuits arranges resistance 5 and capacitor 6 by the direction of positive best negative pole; Be arranged in parallel a circuit with capacitor 6, this circuit is arranged in series the normally closed interlock of relay K 1 and the coil of relay K 2; Described observation circuit arranges breakdown protection circuit, this circuit is arranged in series the normally open contact of relay K 2, the normally open contact of each electrical appliance relay (comprise electrical appliance relay 8, electrical appliance relay 9, electrical appliance relay 10 be connected in parallel mutually, and then be connected in series), the coil of protection relay 11; On the control circuit of described contactor, reset button 12 is set; On the control circuit of described contactor, the auxiliary normally open contact of described contactor 2 and the coil of protection relay 11 that are connected in series are set.
Described relay K 1 turns off induction relay also known as SSR; Relay K 2 is also known as charging induction relay.
The logical circuit that the time delay discharge loop that the utility model utilizes RC to form and relevant relay form realizes puncturing of SSR and detects and defencive function.As Figure 1-4, jointly form complete detection protective circuit by relay K 3-K5 as voltage detecting and KA0 and K1/K2, realize puncturing online and detect and protection.
As shown in Figure 3, in normal state, each after 24VDC control voltage turns off, the output of SSR just should disappear.The coil losing electricity of relay K 1, its normally closed interlock closes, and capacitor 6 (in figure C) will be discharged by relay K 2, and the action making it of short duration once, completes on-line checkingi function.Capacitor 6 discharge off, then detect end.
The effect of resistance 5 limits the excessive charging current of capacitor 6.Meanwhile, when capacitor 6 discharges, limit its impact on circuits for triggering.
Now, if K3-K5 has any one or more maintenance attracting state, just show that SSR punctures out of control.If it is out of control to detect that SSR punctures; now; the logic control circuit be made up of relay K 2 and relay K 3-K5 just drives protection relay 11 (in figure KA0) and contactor 2 (in figure KM) to turn off the upper level power supply of SSR, avoids heating circuit continuous firing and causes serious explosion accident.
SSR, by optoelectronic induction, realizes Phototube Coupling.
As shown in Figure 4, described each electrical appliance relay, comprise electrical appliance relay 8, electrical appliance relay 9, electrical appliance relay 10 normally open contact be arranged in parallel.
Namely when any one normally open contact of electrical appliance relay 8, electrical appliance relay 9, electrical appliance relay 10 closes, all the coil of protection relay 11 can be made to obtain electric, carry out protection act.
As shown in Figure 1, coil and the described electrical appliance 3 of described electrical appliance relay 8, electrical appliance relay 9, electrical appliance relay 10 are connected in parallel.
The coil of electrical appliance relay 8, electrical appliance relay 9, electrical appliance relay 10 is in order to detect the whether energising of three electrical appliances.Have no progeny if closed at SSR, be still energized, then show to break down.
Described electrical appliance is electric heater.
As pointed out in background technology:
In metallurgical casting industry, in the triethylamine generator that sand mold manufacturing equipment is supporting, just employ solid-state relay (SSR) in a large number.In this equipment, triethylamine liquid material adds after in retort and will be heated to 60 degrees centigrade.If but added thermal runaway, the danger of blast will be caused.The utility model, by traditional devices and SSR combination, and adds the cooperation of on-line monitoring and protective circuit, realize device puncture out of control after, effectively heating circuit reliable turn-off, the generation of explosion accident can be avoided.
As shown in Figure 3, on the cathode circuit of the trigger control circuit of described solid-state relay, diode 13 (VD1 in figure) is set, between the first parallel circuits and the second parallel circuits, its conducting direction for from positive pole point to described in solid-state relay 1.
The effect of diode 13 is: when capacitor discharge, only can work to relay K 2.
As shown in Figure 3, on the cathode circuit of the trigger control circuit of described solid-state relay, diode 14 (VD2 in figure) is set, between the second parallel circuits and solid-state relay, its conducting direction for from positive pole point to described in solid-state relay 1.
The effect of diode 14 is: restriction reverse current.
On the control circuit of described contactor, reset button 12 (the RESET button namely in Fig. 2) is set; Described reset button 12 and the auxiliary normally open contact of contactor 2 and the coils from parallel connection of coils of protection relay 11.
RESET button is used for resetting, and after elimination fault, removes the protective effect of the control loop of fault.
As shown in Figure 2, the control circuit of described contactor is 220V alternating current circuit.
As shown in Figure 3, the trigger control circuit of described solid-state relay is 24V DC circuit.
As shown in Figure 4, described breakdown protection circuit is 24V DC circuit.
By reference to the accompanying drawings the utility model is exemplarily described above; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out; or design of the present utility model and technical scheme directly applied to other occasion, all within protection range of the present utility model without to improve.
Claims (7)
1. a solid-state relay observation circuit, described solid-state relay (1) is arranged on the circuit between the contactor (2) of industrial electrical installation and electrical appliance (3), it is characterized in that:
In the trigger control circuit of described solid-state relay, if two parallel circuitss, that is: from power end, be followed successively by: the first parallel circuits establishes the coil of relay K 1 (4); Second parallel circuits arranges resistance (5) and capacitor (6) by the direction of positive best negative pole;
Be arranged in parallel a circuit with capacitor (6), this circuit is arranged in series the normally closed interlock of relay K 1 (4) and the coil of relay K 2 (7);
Described observation circuit arranges breakdown protection circuit, and this circuit is arranged in series the normally open contact of relay K 2 (7), the normally open contact of each electrical appliance relay (8,9,10), the coil of protection relay (11);
On the control circuit of described contactor, the auxiliary normally open contact of described contactor (2) and the coil of protection relay (11) that are connected in series are set.
2. according to solid-state relay observation circuit according to claim 1, it is characterized in that: the normally open contact of described each electrical appliance relay (8,9,10) is arranged in parallel.
3. according to solid-state relay observation circuit according to claim 1, it is characterized in that: the coil of described each electrical appliance relay (8,9,10) is connected in parallel with each electrical appliance (3) respectively.
4. according to solid-state relay observation circuit according to claim 1, it is characterized in that: described electrical appliance is electric heater.
5. according to solid-state relay observation circuit according to claim 1, it is characterized in that: on the cathode circuit of the trigger control circuit of described solid-state relay, diode (13) is set, between the first parallel circuits and the second parallel circuits, its conducting direction for from positive pole point to described in solid-state relay (1).
6. according to solid-state relay observation circuit according to claim 1, it is characterized in that: on the cathode circuit of the trigger control circuit of described solid-state relay, diode (14) is set, between the second parallel circuits and solid-state relay, its conducting direction for from positive pole point to described in solid-state relay (1).
7. according to solid-state relay observation circuit according to claim 1, it is characterized in that: on the control circuit of described contactor, reset button (12) is set; Described reset button (12) and the auxiliary normally open contact of contactor (2) and the coils from parallel connection of coils of protection relay (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420663726.9U CN204231313U (en) | 2014-11-07 | 2014-11-07 | A kind of solid-state relay observation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420663726.9U CN204231313U (en) | 2014-11-07 | 2014-11-07 | A kind of solid-state relay observation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204231313U true CN204231313U (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420663726.9U Expired - Fee Related CN204231313U (en) | 2014-11-07 | 2014-11-07 | A kind of solid-state relay observation circuit |
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| Country | Link |
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| CN (1) | CN204231313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378091A (en) * | 2014-11-07 | 2015-02-25 | 芜湖新兴铸管有限责任公司 | Solid-state relay monitoring circuit |
-
2014
- 2014-11-07 CN CN201420663726.9U patent/CN204231313U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378091A (en) * | 2014-11-07 | 2015-02-25 | 芜湖新兴铸管有限责任公司 | Solid-state relay monitoring circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20201107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |