CN207039164U - A kind of controling circuit structure with fault detection capability - Google Patents
A kind of controling circuit structure with fault detection capability Download PDFInfo
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- CN207039164U CN207039164U CN201721019453.4U CN201721019453U CN207039164U CN 207039164 U CN207039164 U CN 207039164U CN 201721019453 U CN201721019453 U CN 201721019453U CN 207039164 U CN207039164 U CN 207039164U
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- voltage
- contact switch
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- control loop
- resistive element
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Abstract
A kind of controling circuit structure with fault detection capability is the utility model is related to, includes the control loop of connection power supply, contact switch is installed in control loop, the keying of the control loop is controlled by the contact switch, it is characterised in that：The contact switch parallel resistance element, and resistive element arrangement tri- test points of A, B, C, two test points of A, B are located at resistive element both sides, C test points are located on the downside circuit relative with contact switch, if supply voltage is U, voltage is U between A and BAB, voltage is U between A and CAC, voltage is U between B and CBC, UABFor the voltage at resistive element both ends, UAC For the voltage on circuit on the upside of contact switch, UBCFor the voltage on circuit on the downside of contact switch, compared with being sampled to resistive element both end voltage with contact switch to supply voltage, judge whether control circuit is normal.
Description
Technical field
A kind of controling circuit structure is the utility model is related to, especially a kind of circuit structure with fault detection capability.
Background technology
Some important equipment are using the using and the reserved or multi-purpose one standby, as the state more than standby equipment in deactivation, electricity
Movable valve is in valve opening and closes after valve more than most time in halted state, this many kind equipment, after control circuit breaks down,
Can not know, only when needed find can not start, could find it is faulty, and greatly multiple faults have more present control loop
On.If increasing detection part in control circuit, judge whether control circuit is normal, and feedback information, arrange to repair, with regard to that can make
Equipment keeps standing state.
Utility model content
Technical problem to be solved in the utility model is to provide one kind for above-mentioned prior art to have fault detect work(
The controling circuit structure of energy, the abnormal failure of remover apparatus control loop, it is ensured that equipment is in standing state.
The technical scheme in the invention for solving the above technical problem is：A kind of control electricity with fault detection capability
Line structure, include the control loop of connection power supply, contact switch is installed in control loop, institute is controlled by the contact switch
State the keying of control loop, contact switch parallel resistance element, and resistive element arrangement tri- test points of A, B, C, two inspections of A, B
Measuring point is located at resistive element both sides, and C test points are located on the downside circuit relative with contact switch, if supply voltage is U, A and B
Between voltage be UAB, voltage is U between A and CAC, voltage is U between B and CBC, UABFor the voltage at resistive element both ends, UAC Opened for contact
The voltage shut on side line road, UBCFor the voltage on circuit on the downside of contact switch, to resistive element both end voltage and contact switch
Supply voltage sampling is compared, judges whether control circuit is normal.
Preferably, it is provided with protection element in the control loop.
Only in UAB=U、UBCControl loop is normal in the case of ≈ 0, and other situations are mostly abnormal, it is easy to are judged
Control loop situation.It is short circuit separately to have a kind of control loop failure, due to there is control loop protection, in short circuit, and control loop
Protection can disconnect, phenomenon of the phenomenon with " control power supply disappears or control loop protection disconnects ".
Compared with prior art, the utility model has the advantage of：Control circuit is improved, adds fault detect work(
Can, the failure in control loop can be found immediately, it is ensured that stand-by equipment is always maintained at normal standby host state.
Brief description of the drawings
Fig. 1 is existing controling circuit structure；
Fig. 2 is the control circuit for having in the utility model embodiment fault detection capability.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in Fig. 2 the equipment control circuit in the present embodiment includes the control loop of connection power supply, set in control loop
It is equipped with protection element 1.Contact switch 2 is installed in control loop, the keying of control loop, contact are controlled by contact switch 2
2 high resistance measurement elements 3 in parallel are switched, and resistive element 3 arranges tri- test points of A, B, C, if supply voltage is U, between A and B
Voltage is UAB, voltage is U between A and CAC, voltage is U between B and CBC, UABFor the voltage at resistive element both ends, UAC For contact switch
Voltage on the circuit of upside, UBCFor the voltage on circuit on the downside of contact switch, to resistive element both end voltage and contact switch pair
Supply voltage sampling is compared, and judges whether control circuit is normal.
During equipment out of use start contact disconnect, it is various in the case of voltage relationship such as table：
Voltage relationship is analyzed in table：Only in UAB=U、UBCControl loop is normal in the case of ≈ 0, and other situations are mostly
It is abnormal, it is easy to judge control loop situation.It is short circuit separately to have a kind of control loop failure, due to there is control loop protection,
In short circuit, control loop protection can disconnect, phenomenon of the phenomenon with " control power supply disappears or control loop protection disconnects ".
1st, high value element R：In actual circuit, there is induced electricity in alternating current, to prevent induced electricity from causing measuring error,
A low current element is needed, to ignore induced voltage.
2nd, loop is normal：Test point A and power supply one end are connected, and test point B is through the coil switch power other end, in power supply just
In the case of often, there is very little electric current in high value element R, coil can adopt raw very little pressure drop, therefore with coil
UAB≈U；Similarly UBC≈0。
3rd, power supply disappearance or control loop protection is controlled to disconnect：Two pole power supplys disappear more, and control loop is without electricity, i.e. UAB=0、
UBC=0；One pole power supply disappears, the same current potential of control loop, i.e. UAB=0、UBC=0；
4th, circuit breaking on the upside of contact is started：Same pole power supply disappears.
5th, circuit breaking on the downside of contact is started：It is zero to flow through high value element R electric currents, the same current potentials in side of high value element R bis-,
That is UAB=0、UBC=U
6th, the Insulation monitoring under broken string state：When that insulation is low in loop be present, there is broken string situation in control loop
When, high value element R also has certain electric current, can make UABOr UACOr UBCVoltage 0 to certain model between supply voltage
It is interior（It is different according to low position of insulating）.
7、UACAlso can be as the basis for estimation of some failures.
8th, control loop test point：Select the side of unique cut-off point two in loop under normal circumstances.
In addition to the implementation, the utility model also includes other embodiment, all to use equivalents or equivalent
The technical scheme that substitute mode is formed, all should fall within the protection domain of the utility model claims.
Claims (2)
1. a kind of controling circuit structure with fault detection capability, include the control loop of connection power supply, pacify in control loop
Equipped with contact switch, the keying of the control loop is controlled by the contact switch, it is characterised in that：The contact switch is simultaneously
Join resistive element, and resistive element arrangement tri- test points of A, B, C, two test points of A, B are located at resistive element both sides, C tests
Point is on the downside circuit relative with contact switch, if supply voltage is U, voltage is U between A and BAB, voltage is between A and C
UAC, voltage is U between B and CBC, UABFor the voltage at resistive element both ends, UAC For the voltage on circuit on the upside of contact switch, UBCFor
Voltage on the downside of contact switch on circuit, compared with being sampled to resistive element both end voltage with contact switch to supply voltage, judge
Whether control circuit is normal.
2. the controling circuit structure according to claim 1 with fault detection capability, it is characterised in that：It is described to control back
Protection element is provided with road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721019453.4U CN207039164U (en) | 2017-08-15 | 2017-08-15 | A kind of controling circuit structure with fault detection capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721019453.4U CN207039164U (en) | 2017-08-15 | 2017-08-15 | A kind of controling circuit structure with fault detection capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207039164U true CN207039164U (en) | 2018-02-23 |
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ID=61487417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721019453.4U Active CN207039164U (en) | 2017-08-15 | 2017-08-15 | A kind of controling circuit structure with fault detection capability |
Country Status (1)
| Country | Link |
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| CN (1) | CN207039164U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923375A (en) * | 2018-09-27 | 2018-11-30 | 襄阳先义电力科技有限公司 | Wireline inspection, coincidence and off device and method after a kind of tripping of line switching |
| CN117368798A (en) * | 2023-12-04 | 2024-01-09 | 浙江国利信安科技有限公司 | Fault detection circuit and related circuitry |
-
2017
- 2017-08-15 CN CN201721019453.4U patent/CN207039164U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923375A (en) * | 2018-09-27 | 2018-11-30 | 襄阳先义电力科技有限公司 | Wireline inspection, coincidence and off device and method after a kind of tripping of line switching |
| CN117368798A (en) * | 2023-12-04 | 2024-01-09 | 浙江国利信安科技有限公司 | Fault detection circuit and related circuitry |
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