CN213986833U - GIS/GCB circuit breaker three-phase on-off state monitoring device - Google Patents
GIS/GCB circuit breaker three-phase on-off state monitoring device Download PDFInfo
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- CN213986833U CN213986833U CN202022907818.5U CN202022907818U CN213986833U CN 213986833 U CN213986833 U CN 213986833U CN 202022907818 U CN202022907818 U CN 202022907818U CN 213986833 U CN213986833 U CN 213986833U
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Abstract
The utility model discloses a GIS/GCB circuit breaker three-phase opening and closing state monitoring device, which comprises a distance sensor; the distance sensor is connected with a closed shell of the circuit breaker body, and the probe end of the distance sensor faces to the contact point of the moving contact and the static contact in the circuit breaker body. The device has solved prior art and has just monitored the position state of an actuating mechanism's transmission element, and when the actuating mechanism damage leads to three-phase action inconsistent or actual state and position indication feedback inconsistent, equipment lacks looks operation or even short circuit fault, leads to the problem that equipment damaged when serious, has simple structure, reforms transform the cost lower, can effectively monitor the characteristics of circuit breaker three-phase divide-shut brake state.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment state monitoring, concretely relates to GIS/GCB circuit breaker three-phase divide-shut brake state monitoring device.
Background
GIS/GCB is a common electrical device used in power systems. The GIS circuit breaker, the isolation disconnecting link and the grounding disconnecting link are arranged in a metal closed shell, and pressure SF6 (sulfur hexafluoride) or compressed air is sealed in the metal shell; the GCB circuit breaker, the isolation disconnecting link and the grounding disconnecting link are sealed in a metal shell, SF6 (sulfur hexafluoride) or compressed air is sealed in the metal shell of the circuit breaker chamber, and natural air is generally sealed in the metal shells of the isolation disconnecting link and the grounding disconnecting link.
In general, a GIS/GCB isolation switch and a grounding switch are switched on and off by adopting a single motor to drive three-phase linkage operation, some circuit breakers are operated by split-phase hydraulic mechanisms, and part of the circuit breakers are operated by single hydraulic mechanisms to drive the three-phase linkage operation; because the breaker and the isolation disconnecting link are high voltage and large current under the normal operation condition, the opening and closing auxiliary switch (monitoring opening and closing state) is not directly installed on the contact conductor but installed on a certain part of the operating mechanism, so the feedback of the state is actually the state of the part of the operating mechanism. The three-phase linkage breaker, the isolation disconnecting link and the grounding disconnecting link are provided with the auxiliary switch of the switch-on and switch-off only at the driving end of the operating mechanism, and the other two phases are not provided.
The prior technical proposal is that a screw rod and a microswitch combined directional position monitoring device are generally arranged on a linkage rod at the tail end; the installation position of the existing opening and closing auxiliary switch determines the position state of a transmission element of an operating mechanism, rather than the position state of an overcurrent contact, which is monitored by the existing opening and closing auxiliary switch; in practical application, the operating mechanism has the conditions of component falling, part damage and the like, so that three-phase actions of a breaker, an isolation switch or a grounding switch are inconsistent, or an actual state and position indication feedback are inconsistent, so that equipment runs in a phase-lacking mode or even has a short-circuit fault, and the equipment is damaged in serious conditions.
Disclosure of Invention
The utility model aims to solve the technical problem that a GIS/GCB circuit breaker three-phase divide-shut brake state monitoring device is provided, the device has solved prior art and has only monitored operating mechanism's a transmission element's position state, when operating mechanism damages to lead to three-phase action inconsistent or actual condition and position indication feedback inconsistent, equipment lacks looks operation short-circuit fault even, lead to the problem that equipment damaged when serious, simple structure has, the transformation cost is lower, can effectively monitor the characteristics of circuit breaker three-phase divide-shut brake state.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a GIS/GCB circuit breaker three-phase on-off state monitoring device comprises a distance sensor; the distance sensor is connected with a closed shell of the circuit breaker body, and the probe end of the distance sensor faces to the contact point of the moving contact and the static contact in the circuit breaker body.
Preferably, the distance sensor is connected at a viewing window outside the closed housing; the distance sensor is preferably a laser distance sensor; preferably, the distance sensor can also be connected inside the closed housing when conditions such as insulation, sealing and the like are met.
Preferably, the distance measurement setting value of the distance sensor is smaller than the distance between the probe of the distance sensor and the inner wall of the other end of the opposite closed shell.
Preferably, the distance measurement setting value of the distance sensor is greater than the distance between the probe of the distance sensor and the outer surface of the movable contact in a closing state.
Preferably, the three phases of the circuit breaker body are provided with a distance sensor, and each distance sensor is electrically connected with a position relay.
Preferably, the position relay comprises three position relays, namely a position relay K1, a position relay K2 and a position relay K3; the position relay is provided with a normally open contact and a normally closed contact.
Preferably, the normally open contact of the position relay is connected with a three-phase closing current collector K4 in series to form a three-phase closing indication loop and is connected with a power system monitoring system.
Preferably, the normally closed contact of the position relay is connected with a three-phase opening current collector K5 in series to form a three-phase opening indicating loop and is connected with a power system monitoring system.
Preferably, normally closed contacts of the position relay are connected in parallel to form a first parallel module, normally open contacts are connected in parallel to form a second parallel module, the first parallel module, the second parallel module and the transmission mechanism fault relay K6 are connected in series to form a three-phase consistency indicating loop, and the three-phase consistency indicating loop is connected into a power system monitoring system.
Preferably, the device is also applicable to isolation switches and grounding switches.
The utility model provides a pair of GIS/GCB circuit breaker three-phase divide-shut brake state monitoring device's beneficial effect as follows:
the device actually monitors the position state of a moving contact of a breaker, an isolation switch or a grounding switch through a non-contact distance sensor, but not monitors the position state of a middleware of an operating mechanism, so that feedback errors caused by faults of the operating mechanism are avoided; the defect that signals possibly generated by monitoring the intermediate element of the operating mechanism are inconsistent with the reality is eliminated, the signals are ensured to be consistent with the reality, and the safety of equipment is ensured.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic diagram of the opening state in the embodiment of the present invention.
Fig. 2 is a schematic diagram of a closing state in an embodiment of the present invention.
Fig. 3 is a logic schematic diagram of a secondary circuit for monitoring the opening and closing state by connecting position relays in the embodiment of the present invention.
The reference numbers in the figures are: the device comprises a closed shell 1, an operating mechanism 2, an insulating support 3, a moving contact 4, a static contact 5, an observation window 6 and a distance sensor 7.
Detailed Description
As shown in fig. 1 to 3, a GIS/GCB circuit breaker three-phase opening and closing state monitoring device includes a distance sensor; the distance sensor is connected with a closed shell of the circuit breaker body, and the probe end of the distance sensor faces to the contact point of the moving contact and the static contact in the circuit breaker body; a moving contact of the circuit breaker body is connected with the operating mechanism in a matching way, and a fixed contact is fixed; insulation supports are arranged between the moving contact and the static contact and the inner wall of the closed shell.
Preferably, the distance sensor is connected at a viewing window outside the closed housing; the distance sensor is preferably a laser distance sensor.
Preferably, the distance sensor is attached inside the closed housing.
Preferably, the distance measurement setting value of the distance sensor is smaller than the distance between the probe of the distance sensor and the inner wall of the other end of the opposite closed shell.
Preferably, the distance measurement setting value of the distance sensor is greater than the distance between the probe of the distance sensor and the outer surface of the movable contact in a closing state.
Preferably, the three phases of the circuit breaker body are provided with a distance sensor, and each distance sensor is electrically connected with a position relay.
Preferably, the position relay comprises three position relays, namely a position relay K1, a position relay K2 and a position relay K3; the position relay is provided with a normally open contact and a normally closed contact.
Preferably, the normally open contact of the position relay is connected with a three-phase closing current collector K4 in series to form a three-phase closing indication loop and is connected with a power system monitoring system.
Preferably, the normally closed contact of the position relay is connected with a three-phase opening current collector K5 in series to form a three-phase opening indicating loop and is connected with a power system monitoring system.
Preferably, normally closed contacts of the position relay are connected in parallel to form a first parallel module, normally open contacts are connected in parallel to form a second parallel module, the first parallel module, the second parallel module and the transmission mechanism fault relay K6 are connected in series to form a three-phase consistency indicating loop, and the three-phase consistency indicating loop is connected into a power system monitoring system.
Preferably, the device is also applicable to isolation switches and grounding switches.
The GIS/GCB circuit breaker three-phase opening and closing state monitoring device has the following working principle:
the energy emitted by the distance sensor can penetrate through the closed shell or the observation window and detect the position of the moving contact;
as shown in fig. 1, when the knife switch is in an open state, the movable contact moves to be separated from the fixed contact, and a result L measured by the distance sensor is a distance between the sensor and a point O on the inner surface of the opposite side of the housing, which is denoted as L1.
As shown in fig. 2, when the knife switch is in a closed state, the movable contact moves to contact with the fixed contact, and a result L measured by the distance sensor is a distance between the sensor and a point C on an outer surface of the movable contact, which is recorded as L2.
Because the closed shell can be seen as a thin-wall structure, the physical state of the disconnecting state and the closing state of the isolating knife switch can be known:
setting a distance measurement setting value L of the distance sensor as follows:
L1>L>L2；
firstly, when the isolation switch is opened, the distance sensor cannot detect an object, and a normally open output loop is not conducted;
and secondly, when the isolation disconnecting link is switched on, the distance sensor can detect an object, and a normally open output loop is conducted.
Therefore, the position of the movable contact can be judged according to the output result of the distance sensor, and the opening and closing state of the disconnecting link can be fed back.
As shown in fig. 3, the a-phase, B-phase, and C-phase mounted distance sensors are represented by G1, G2, and G3, respectively, for the three phases of the isolation switch.
The output contacts of the K4, K5 and K6 relays are sent to a computer monitoring system of a power system, a relay protection device and other devices, so that the functions of remotely and reliably monitoring the state of the isolation disconnecting link and protecting the complete equipment can be realized.
When the distance sensor output is specific length data, it can be monitored by performing an operation similar to the logic of fig. 3.
The distance sensor measures the state of the moving contact and is irrelevant to the transmission mechanism, so that the distance sensor has the characteristic of high reliability; the principle of the breaker and the grounding knife switch is similar.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (10)
1. The utility model provides a GIS/GCB circuit breaker three-phase divide-shut brake state monitoring device which characterized in that: it comprises a distance sensor (7); the distance sensor (7) is connected with the closed shell (1) of the circuit breaker body, and the probe end of the distance sensor (7) faces to the contact point of the moving contact (4) and the static contact (5) in the circuit breaker body.
2. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 1, characterized in that: the distance sensor (7) is connected to an observation window (6) outside the closed housing (1).
3. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 1, characterized in that: the distance sensor (7) is connected inside the closed shell (1).
4. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 1, characterized in that: the distance measurement setting value of the distance sensor (7) is smaller than the distance between the probe of the distance sensor (7) and the inner wall of the other end of the opposite closed shell (1).
5. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 1, characterized in that: and the distance measurement setting value of the distance sensor (7) is greater than the distance between a probe of the distance sensor (7) and the outer surface of the movable contact in a closing state.
6. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 1, characterized in that: the three-phase circuit breaker is characterized in that the three phases of the circuit breaker body are respectively provided with a distance sensor (7), and each distance sensor (7) is electrically connected with one position relay.
7. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 6, characterized in that: the position relay comprises three position relays which are respectively a position relay K1, a position relay K2 and a position relay K3; the position relay is provided with a normally open contact and a normally closed contact.
8. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 6, characterized in that: and a normally open contact of the position relay is connected with a three-phase closing current collector K4 in series to form a three-phase closing indicating loop and is connected with a power system monitoring system.
9. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 6, characterized in that: the normally closed contact of the position relay is connected with a three-phase opening current collector K5 in series to form a three-phase opening indicating loop, and the three-phase opening indicating loop is connected with a power system monitoring system.
10. The GIS/GCB circuit breaker three-phase opening and closing state monitoring device according to claim 6, characterized in that: the normally closed contacts of the position relay are connected in parallel to form a first parallel module, the normally open contacts are connected in parallel to form a second parallel module, the first parallel module, the second parallel module and the transmission mechanism fault relay K6 are connected in series to form a three-phase consistency indicating loop, and the three-phase consistency indicating loop is connected into a power system monitoring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022907818.5U CN213986833U (en) | 2020-12-07 | 2020-12-07 | GIS/GCB circuit breaker three-phase on-off state monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022907818.5U CN213986833U (en) | 2020-12-07 | 2020-12-07 | GIS/GCB circuit breaker three-phase on-off state monitoring device |
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| CN213986833U true CN213986833U (en) | 2021-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539930A (en) * | 2020-12-07 | 2021-03-23 | 中国长江电力股份有限公司 | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method |
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2020
- 2020-12-07 CN CN202022907818.5U patent/CN213986833U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539930A (en) * | 2020-12-07 | 2021-03-23 | 中国长江电力股份有限公司 | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method |
| CN112539930B (en) * | 2020-12-07 | 2022-04-19 | 中国长江电力股份有限公司 | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method |
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