CN104503311A - Redundant circuit for controlling heater in distribution cabinet - Google Patents
Redundant circuit for controlling heater in distribution cabinet Download PDFInfo
- Publication number
- CN104503311A CN104503311A CN201410747511.XA CN201410747511A CN104503311A CN 104503311 A CN104503311 A CN 104503311A CN 201410747511 A CN201410747511 A CN 201410747511A CN 104503311 A CN104503311 A CN 104503311A
- Authority
- CN
- China
- Prior art keywords
- circuit
- chip microcomputer
- distribution cabinet
- redundancy determination
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
Abstract
The invention discloses a redundant circuit for controlling a heater in a distribution cabinet. The redundant circuit comprises a single chip, a redundant judging circuit and an OR gate circuit, wherein a control power source of the single chip is different from the control power source of the redundant judging circuit; a first output end of the single chip is connected with a first input end of the OR gate circuit; a second output end of the single chip is connected with an input end of the redundant judging circuit; an output end of the redundant judging circuit is connected with a second input end of the OR gate circuit; the output end of the OR gate circuit is connected with a relay in the distribution cabinet; the relay is used for controlling the switch-on/off of a heater loop of the heater in the distribution cabinet; if a pulse signal sent by the single chip is not received by the redundant judging circuit within 120 minutes, a high-level signal is outputted to the OR gate circuit; the heater is switched-on by switching on the relay by the OR gate circuit for a long term.
Description
Technical field
The present invention relates to a kind of redundant circuit for controlling power distribution cabinet internal heater in power transmission and distribution field.
Background technology
Time under the environment such as the power equipment such as electric equipment protection cabinet, instrument box, metering cabinet, switch cubicle etc., terminal box is as too low in temperature in long-time running, temperature is too high or humidity is excessive, its safe operation all will be on the hazard.All well heater is housed in current power distribution cabinet, to ensure that the temperature and humidity in power distribution cabinet keeps normal level.Power distribution cabinet internal heater mostly is normally on, and the current supply circuit at its well heater place is powered by alternating current bus bar, uses well heater P cock to carry out the switching of loop conducting.The heater circuit at section heaters place adopts a relay be connected with single-chip microcomputer to carry out the switching of conducting and open-circuit condition.Single-chip microcomputer timing to send the signal of a high level to relay, make heater circuit conducting, or sends a low level signal heater circuit is opened a way.The direct supply dead electricity of single-chip microcomputer or the program fleet of single-chip microcomputer can cause the heater circuit at well heater place normally to run, and the moisture in power distribution cabinet cannot be discharged, thus affect the normal operation of power distribution cabinet.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of redundant circuit for controlling power distribution cabinet internal heater is provided, it can prevent from making relay for a long time cannot conducting because controlling the inefficacy of the single-chip microcomputer of pilot relay in power distribution cabinet, and make well heater in power distribution cabinet cannot conducting, and then make well heater in power distribution cabinet cannot the appearance of problem of conducting, ensure the safe operation of equipment in power distribution cabinet.
The another kind of technical scheme realizing above-mentioned purpose is: a kind of redundant circuit for controlling power distribution cabinet internal heater, comprise single-chip microcomputer, redundancy determination circuit and OR circuit, the control power supply of described single-chip microcomputer and the control power supply of described redundancy determination circuit are different;
First output terminal of described single-chip microcomputer connects the first input end of described OR circuit, second output terminal of described single-chip microcomputer connects the input end of described redundancy determination circuit, the output terminal of described redundancy determination circuit connects the second input end of described OR circuit, the output terminal of described OR circuit connects the relay in power distribution cabinet, and this relay is for controlling conducting or the open circuit of the heater circuit at power distribution cabinet internal heater place;
When described single-chip microcomputer is in running order, timing sends a pulse signal respectively to described OR circuit and described redundancy determination circuit, described OR circuit is after receiving the pulse signal that described single-chip microcomputer sends, send a pulse signal to described relay, make the conducting of power distribution cabinet internal heater or open circuit by described relay;
When in 120 minutes, described redundancy determination circuit does not receive described single-chip microcomputer and sends lasting pulse signal, then export a high level signal to described OR circuit, by relay described in the long-time conducting of described OR circuit, make the long-time conducting of described well heater.
Further, the Trigger of time of the built-in Schneider of described redundancy determination circuit, when Trigger of time described in 120 minutes detects the pulse signal input of the high level that described single-chip microcomputer sends, then make described redundancy determination circuit output low level signal, if when the pulse signal input of the high level that described single-chip microcomputer sends not detected, described redundancy determination circuit is then made to export high level signal, to make described relay conducting.
Further, the control power supply of described single-chip microcomputer is obtained by the little bus step-down of direct current, and the control power supply of described redundancy determination circuit is from ac panel.
Have employed the technical scheme of a kind of redundant circuit for controlling power distribution cabinet internal heater of the present invention, it comprises single-chip microcomputer, redundancy determination circuit and OR circuit, and the control power supply of described single-chip microcomputer and the control power supply of described redundancy determination circuit are different; First output terminal of described single-chip microcomputer connects the first input end of described OR circuit, second output terminal of described single-chip microcomputer connects the input end of described redundancy determination circuit, the output terminal of described redundancy determination circuit connects the second input end of described OR circuit, the output terminal of described OR circuit connects the relay in power distribution cabinet, and this relay is for controlling conducting or the open circuit of the heater circuit at power distribution cabinet internal heater place; When described single-chip microcomputer is in running order, timing sends a pulse signal respectively to described OR circuit and described redundancy determination circuit, described OR circuit is after receiving the pulse signal that described single-chip microcomputer sends, send a pulse signal to described relay, make the conducting of power distribution cabinet internal heater or open circuit by described relay; When in 120 minutes, described redundancy determination circuit does not receive described single-chip microcomputer and sends lasting pulse signal, then export a high level signal to described OR circuit, by relay described in the long-time conducting of described OR circuit, make the long-time conducting of described well heater.Its technique effect can prevent from making relay for a long time cannot conducting because controlling the inefficacy of the single-chip microcomputer of pilot relay in power distribution cabinet, and make heater circuit in power distribution cabinet cannot conducting, and then make well heater in power distribution cabinet cannot the appearance of problem of conducting, ensure the safe operation of equipment in power distribution cabinet.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of redundant circuit for controlling power distribution cabinet internal heater of the present invention.
Embodiment
Refer to Fig. 1, the present inventor, in order to understand technical scheme of the present invention better, below by embodiment particularly, and is described in detail by reference to the accompanying drawings:
Refer to Fig. 1, a kind of redundant circuit for controlling power distribution cabinet internal heater of the present invention, comprise single-chip microcomputer 1, redundancy determination circuit 2 and OR circuit 3, wherein the control power supply of single-chip microcomputer 1 is from the little bus of direct current, and the control power supply of redundancy determination circuit 2 is ac panel.First output terminal of single-chip microcomputer 1 connects the first input end of OR circuit 3, and the second output terminal of single-chip microcomputer 1 connects the input end of redundancy determination circuit 2.The output terminal of redundancy determination circuit 2 connects the second input end of OR circuit 3.The output terminal of OR circuit 3 connects the relay 4 in power distribution cabinet, and this relay 4 is for controlling conducting or the open circuit of the heater circuit at power distribution cabinet internal heater place.
When single-chip microcomputer 1 is in running order, timing sends a pulse signal respectively to OR circuit 3 and redundancy determination circuit 2, OR circuit 3 is after receiving the pulse signal that single-chip microcomputer 1 sends, send a pulse signal to relay 4, made conducting or the open circuit of the heater circuit at power distribution cabinet internal heater place by relay 4.
When in 120 minutes, redundancy determination circuit 2 does not receive the pulse signal that single-chip microcomputer 1 sends, then represent that the direct supply of single-chip microcomputer 1 is lost or program error, now redundancy determination circuit 2 exports a high level signal to OR circuit 3, by the long-time turn-on relay of OR circuit 3, make heater circuit conducting.The Trigger of time of the built-in Schneider of redundancy determination circuit 2, when having pulse signal to input in 120 minutes, then make redundancy determination circuit output low level signal, if during pulse-free signal input, redundancy determination circuit 2 is then made to export high level signal, to make relay 4 conducting.
The control power supply of redundancy determination circuit 2 is the power supply of alternating current bus bar, and by obtaining after rectification step-down, namely the control power supply of redundancy determination circuit 2 is from ac panel.The control power supply of single-chip microcomputer 1 is obtained by the little bus step-down of direct current.If directly adopt the direct supply of single-chip microcomputer 1, then can cause redundancy determination circuit 2 dead electricity when the little bus of direct current damages, the function of its redundancy determination cannot be played.
A kind of those of ordinary skill in the art of the present invention will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (3)
1. for controlling a redundant circuit for power distribution cabinet internal heater, it is characterized in that: comprise single-chip microcomputer, redundancy determination circuit and OR circuit, the control power supply of described single-chip microcomputer and the control power supply of described redundancy determination circuit are different;
First output terminal of described single-chip microcomputer connects the first input end of described OR circuit, second output terminal of described single-chip microcomputer connects the input end of described redundancy determination circuit, the output terminal of described redundancy determination circuit connects the second input end of described OR circuit, the output terminal of described OR circuit connects the relay in power distribution cabinet, and this relay is for controlling conducting or the open circuit of the heater circuit at power distribution cabinet internal heater place;
When described single-chip microcomputer is in running order, timing sends a pulse signal respectively to described OR circuit and described redundancy determination circuit, described OR circuit is after receiving the pulse signal that described single-chip microcomputer sends, send a pulse signal to described relay, make the conducting of power distribution cabinet internal heater or open circuit by described relay;
When in 120 minutes, described redundancy determination circuit does not receive the pulse signal that described single-chip microcomputer sends, then export a high level signal to described OR circuit, by relay described in the long-time conducting of described OR circuit, makes the long-time conducting of described well heater.
2. a kind of redundant circuit for controlling power distribution cabinet internal heater according to claim 1, it is characterized in that: the Trigger of time of the built-in Schneider of described redundancy determination circuit, when Trigger of time described in 120 minutes detects the pulse signal input of the high level that described single-chip microcomputer sends, then make described redundancy determination circuit output low level signal, if when the pulse signal input of the high level that described single-chip microcomputer sends not detected, described redundancy determination circuit is then made to export high level signal, to make described relay conducting.
3. a kind of redundant circuit for controlling power distribution cabinet internal heater according to claim 1, is characterized in that: the control power supply of described single-chip microcomputer is obtained by the little bus step-down of direct current, and the control power supply of described redundancy determination circuit is from ac panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410747511.XA CN104503311A (en) | 2014-12-09 | 2014-12-09 | Redundant circuit for controlling heater in distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410747511.XA CN104503311A (en) | 2014-12-09 | 2014-12-09 | Redundant circuit for controlling heater in distribution cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104503311A true CN104503311A (en) | 2015-04-08 |
Family
ID=52944715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410747511.XA Pending CN104503311A (en) | 2014-12-09 | 2014-12-09 | Redundant circuit for controlling heater in distribution cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104503311A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789700A (en) * | 2005-10-31 | 2006-06-21 | 谭启仁 | OR gate dual-monitoring device of SCM for preventing physical damage when repairing automobile at bottom |
| US20080272809A1 (en) * | 2007-05-03 | 2008-11-06 | Arm Limited | Integrated circuit power-on control and programmable comparator |
| CN102522803A (en) * | 2011-11-30 | 2012-06-27 | 东方电气集团东方汽轮机有限公司 | Intelligent charger of pitch system of wind power generator |
-
2014
- 2014-12-09 CN CN201410747511.XA patent/CN104503311A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789700A (en) * | 2005-10-31 | 2006-06-21 | 谭启仁 | OR gate dual-monitoring device of SCM for preventing physical damage when repairing automobile at bottom |
| US20080272809A1 (en) * | 2007-05-03 | 2008-11-06 | Arm Limited | Integrated circuit power-on control and programmable comparator |
| CN102522803A (en) * | 2011-11-30 | 2012-06-27 | 东方电气集团东方汽轮机有限公司 | Intelligent charger of pitch system of wind power generator |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |