CN210123467U - Control loop monitoring and fault range judging system - Google Patents
Control loop monitoring and fault range judging system Download PDFInfo
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- CN210123467U CN210123467U CN201920935149.7U CN201920935149U CN210123467U CN 210123467 U CN210123467 U CN 210123467U CN 201920935149 U CN201920935149 U CN 201920935149U CN 210123467 U CN210123467 U CN 210123467U
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Abstract
The application discloses a control loop monitoring and fault range judging system, wherein a first monitoring circuit is connected in parallel at two ends of a switching-on/off branch circuit, and a second monitoring circuit is connected in parallel at two ends of the switching-on/off branch circuit and a relay branch circuit; the first monitoring circuit comprises a first monitoring relay, a protective relay and a first current limiting resistor; the second monitoring circuit includes a second monitoring relay and a second current limiting resistor. The embodiment of the utility model provides a control circuit is kept watch on and fault range judgement system, inserts first monitoring circuit and second monitoring circuit in the control circuit, does not influence the normal divide-shut brake function of switch, when taking place the control circuit broken string, can judge the interval that takes place the broken string, reduces the investigation scope; in order to prevent the first monitoring circuit from being burnt due to the short circuit, a protective relay is added into the first monitoring circuit, when the current reaches a certain degree, the first monitoring circuit is disconnected, and meanwhile, the third indicator lamp emits indicator light to indicate the short circuit of the control circuit.
Description
Technical Field
The utility model belongs to the technical field of automated control, especially, relate to a control circuit is kept watch on and fault range discrimination system.
Background
When the CJ6 series knife switch electric operating mechanism is in normal operation, the knife switch cannot be switched on and off when the control loop is broken. Because the disconnecting link control circuit is not provided with a monitoring circuit, the reason that the disconnecting link cannot be switched on or switched off cannot be intuitively judged, the switching control circuit cannot be monitored in real time, the integrity of the circuit is judged, and when a fault occurs, the number of terminals of the mechanism control circuit is large, so that the troubleshooting and judgment of a fault point are time-consuming and labor-consuming.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a control circuit is kept watch on and fault range discrimination system to technical problem more than solving.
To achieve the purpose, the utility model adopts the following technical proposal:
a control circuit monitoring and fault range judging system comprises a switching-on and switching-off branch and a relay branch connected with the switching-on and switching-off branch in series, wherein two ends of the switching-on and switching-off branch are connected with a first monitoring circuit in parallel, and two ends of the switching-on and switching-off branch and the relay branch are connected with a second monitoring circuit in parallel;
the first monitoring circuit comprises a first monitoring relay and a first current limiting resistor;
the second monitoring circuit comprises a second monitoring relay and a second current limiting resistor;
the starting current of the second monitoring relay is larger than that of the first monitoring relay;
the contact of the first monitoring relay is electrically connected with a first indicator light, and the contact of the second monitoring relay is electrically connected with a second indicator light.
Optionally, the first monitoring circuit further includes a protection relay, and the protection relay is connected in series with the first monitoring relay and the first current limiting resistor;
the starting current of the protection relay is larger than that of the first monitoring relay;
and the contact of the protection relay is electrically connected with a third indicator light.
Optionally, the first indicator light includes a first red light and a first green light, the second indicator light includes a second red light and a second green light, and the third indicator light includes a third red light and a third green light;
a normally closed contact of the first monitoring relay is connected to the first green light, and a normally open contact of the first monitoring relay is connected to the first red light;
a normally closed contact of the second monitoring relay is connected to the second green light, and a normally open contact of the second monitoring relay is connected to the second red light;
and a normally closed contact of the protection relay is connected to the third green light, and a normally open contact of the protection relay is connected to the third red light.
Optionally, the first indicator light, the second indicator light and the third indicator light are respectively connected in series with a third current limiting resistor.
Optionally, the relay branch includes a main relay, and the starting current of the main relay is greater than the starting current of the protection relay.
Optionally, the main relay, the first monitoring relay, the second monitoring relay and the protection relay are all overcurrent relays.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
the embodiment of the utility model provides a pair of control circuit is kept watch on and fault range discrimination system inserts first monitoring circuit and second monitoring circuit in control circuit, does not influence the normal divide-shut brake function of switch, when taking place the control circuit broken string, can judge the interval of taking place the broken string, reduces the investigation scope, has very strong practicality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a circuit diagram of a control circuit according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a control loop monitoring and fault range determining system according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of an indication circuit according to an embodiment of the present invention.
Illustration of the drawings:
the relay protection circuit comprises a first monitoring relay 1, a first node 2, a protection relay 3, a first current limiting resistor 4, a second protection node 5, a second monitoring relay 6, a second current limiting resistor 7, a first indicator lamp 8, a second indicator lamp 9 and a third indicator lamp 10;
a third current limiting resistor 100, a switching-on/off branch 101 and a relay branch 102; a first monitoring circuit 103 and a second monitoring circuit 104;
the monitoring relay comprises a normally closed contact 11 of a first monitoring relay, a normally open contact 12 of the first monitoring relay, a normally closed contact 61 of a second monitoring relay, a normally open contact 62 of the second monitoring relay, a normally closed contact 31 of a protection relay and a normally open contact 32 of the protection relay.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 3, the present embodiment provides a control circuit monitoring and fault range determining system, where the control circuit includes a switching-closing branch 101 and a relay branch 102 connected in series with the switching-closing branch.
A first monitoring circuit 103 is connected in parallel to both ends of the switching-on/off branch 101, and a second monitoring circuit 104 is connected in parallel to both ends of the switching-on/off branch 101 and the relay branch 102.
The first monitoring circuit 103 includes a first monitoring relay 1 and a first current limiting resistor 4.
The second monitoring circuit 104 includes a second monitoring relay 6 and a second current limiting resistor 7.
The starting current of the second monitoring relay 6 is larger than that of the first monitoring relay 1.
The contact of the first monitoring relay 1 is electrically connected with a first indicator light 8, and the contact of the second monitoring relay 6 is electrically connected with a second indicator light 9.
When the A, B area is broken, the current flowing through 1, 2, 3 and 4 is increased, the first monitoring relay 1 is started, the second monitoring relay 6 is not started, and the first indicator light 8 emits indicator light to indicate that the AB area is broken.
When the B, C area is broken, only 5, 6 and 7 are electrified, and the current is increased. The second monitoring relay 6 is activated and the second indicator light 9 emits an indicator light indicating that the B, C area is disconnected.
Therefore, the embodiment of the utility model provides a pair of control circuit is kept watch on and fault range discrimination system inserts first monitoring circuit 103 and second monitoring circuit 104 in control circuit, does not influence the normal divide-shut brake function of switch, when taking place the control circuit broken string, can judge the interval of taking place the broken string, reduces the investigation scope, has very strong practicality.
Example two
On the basis of the first embodiment, the present embodiment provides a control loop monitoring and fault range determining system, the first monitoring circuit 103 further includes a protection relay 3, and the protection relay 3 is connected in series with the first monitoring relay 1 and the first current limiting resistor 4. Where 2 and 5 are the first node 2 and the second node 5 of the protection relay 3.
The starting current of the protective relay 3 is larger than the starting current of the first monitoring relay 1.
The contact points of the protective relay 3 are electrically connected with a third indicator light 10.
In this embodiment, in order to prevent the coil from being burnt out due to the short circuit of the first monitoring circuit 103, the protection relay 3 is added in the first monitoring circuit 103, and when the current reaches a certain degree, the first monitoring circuit 103 is turned off, and meanwhile, the third indicator light 10 emits an indicator light to indicate that the control loop is short-circuited.
EXAMPLE III
On the basis of the second embodiment, the second embodiment provides a control loop monitoring and fault range determination system, wherein the first indicator light 8 includes a first red light and a first green light, the second indicator light 9 includes a second red light and a second green light, and the third indicator light 10 includes a third red light and a third green light.
Normally closed contact 11 of first monitor relay 1 connects in first green light, normally open contact 12 of first monitor relay 1 connects in first red light.
The normally closed contact 61 of the second monitoring relay 6 is connected to the second green light, and the normally open contact 62 of the second monitoring relay 6 is connected to the second red light.
The normally closed contact 31 of the protection relay 3 is connected to the third green light, and the normally open contact 32 of the protection relay 3 is connected to the third red light.
Example four
In addition to the second embodiment, the present embodiment provides a control circuit monitoring and fault range determining system, wherein the first indicator light 8, the second indicator light 9, and the third indicator light 10 are respectively connected in series with a third current limiting resistor 100.
EXAMPLE five
On the basis of the second embodiment, the present embodiment provides a control loop monitoring and fault range determination system, the relay branch 102 includes a main relay KM1, and the starting current of the main relay KM1 is greater than the starting current of the protection relay 3.
EXAMPLE six
On the basis of the fifth embodiment, the present embodiment provides a control circuit monitoring and fault range determination system, and the main relay KM1, the first monitoring relay 1, the second monitoring relay 6, and the protection relay 3 are all overcurrent relays.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A control loop monitoring and fault range judging system is provided, the control loop comprises a switching-on and switching-off branch circuit and a relay branch circuit connected in series with the switching-on and switching-off branch circuit, and is characterized in that:
the two ends of the opening and closing branch circuit are connected with a first monitoring circuit in parallel, and the two ends of the opening and closing branch circuit and the relay branch circuit are connected with a second monitoring circuit in parallel;
the first monitoring circuit comprises a first monitoring relay and a first current limiting resistor;
the second monitoring circuit comprises a second monitoring relay and a second current limiting resistor;
the starting current of the second monitoring relay is larger than that of the first monitoring relay;
the contact of the first monitoring relay is electrically connected with a first indicator light, and the contact of the second monitoring relay is electrically connected with a second indicator light.
2. The control loop monitoring and fault range discrimination system of claim 1, wherein:
the first monitoring circuit further comprises a protective relay, and the protective relay is connected with the first monitoring relay and a first current-limiting resistor in series;
the starting current of the protection relay is larger than that of the first monitoring relay;
and the contact of the protection relay is electrically connected with a third indicator light.
3. The control loop monitoring and fault range discrimination system of claim 2, wherein:
the first indicator light comprises a first red light and a first green light, the second indicator light comprises a second red light and a second green light, and the third indicator light comprises a third red light and a third green light;
a normally closed contact of the first monitoring relay is connected to the first green light, and a normally open contact of the first monitoring relay is connected to the first red light;
a normally closed contact of the second monitoring relay is connected to the second green light, and a normally open contact of the second monitoring relay is connected to the second red light;
and a normally closed contact of the protection relay is connected to the third green light, and a normally open contact of the protection relay is connected to the third red light.
4. The control loop monitoring and fault range discrimination system of claim 2, wherein:
and the first indicator light, the second indicator light and the third indicator light are respectively connected with a third current limiting resistor in series.
5. The control loop monitoring and fault range discrimination system of claim 2, wherein:
the relay branch comprises a main relay, and the starting current of the main relay is larger than that of the protection relay.
6. The control loop monitoring and fault range discrimination system of claim 5, wherein:
the main relay, the first monitoring relay, the second monitoring relay and the protection relay are all overcurrent relays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920935149.7U CN210123467U (en) | 2019-06-20 | 2019-06-20 | Control loop monitoring and fault range judging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920935149.7U CN210123467U (en) | 2019-06-20 | 2019-06-20 | Control loop monitoring and fault range judging system |
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| CN210123467U true CN210123467U (en) | 2020-03-03 |
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| CN201920935149.7U Active CN210123467U (en) | 2019-06-20 | 2019-06-20 | Control loop monitoring and fault range judging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146773A (en) * | 2019-06-20 | 2019-08-20 | 广东电网有限责任公司 | A kind of monitoring of control loop and fault coverage judgement system |
| CN111667669A (en) * | 2020-06-15 | 2020-09-15 | 贵州电网有限责任公司 | 2M communication channel fault monitoring device for power system |
-
2019
- 2019-06-20 CN CN201920935149.7U patent/CN210123467U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146773A (en) * | 2019-06-20 | 2019-08-20 | 广东电网有限责任公司 | A kind of monitoring of control loop and fault coverage judgement system |
| CN111667669A (en) * | 2020-06-15 | 2020-09-15 | 贵州电网有限责任公司 | 2M communication channel fault monitoring device for power system |
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