CN109300747A - A kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device - Google Patents
A kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device Download PDFInfo
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- CN109300747A CN109300747A CN201811232275.2A CN201811232275A CN109300747A CN 109300747 A CN109300747 A CN 109300747A CN 201811232275 A CN201811232275 A CN 201811232275A CN 109300747 A CN109300747 A CN 109300747A
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- control switch
- indicator light
- circuit breaker
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- 238000010586 diagram Methods 0.000 description 4
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- 241000098700 Sarcocheilichthys parvus Species 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage
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- Keying Circuit Devices (AREA)
- Breakers (AREA)
Abstract
The embodiment of the invention provides a kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator devices, including the small bus of flash of light, control switch, the first indicator light and the second indicator light；By the way that glisten small bus and indicator light are added in original circuit breaker control circuit, and pass through the small bus of the different contacts of control switch connection flash of light and indicator light, when divide-shut brake automatic using breaker and the not principle of correspondence of control switch realizes the flashing of indicator light, and then the divide-shut brake movement for allowing the operator to intuitively obtain breaker by the luminous different form of indicator light is manual operation or is automatically brought into operation.
Description
Technical Field
The embodiment of the invention relates to the technical field of electrical control, in particular to a circuit breaker opening and closing action indicating device in a high-voltage switch cabinet.
Background
The existing small control bus in the high-voltage switch cabinet (such as a KYN28 type high-voltage switch cabinet) basically meets the control requirement of a circuit breaker, and comprises the following steps: (1) the closing and tripping coils of the circuit breaker are designed according to short-time electrification, namely, the opening and closing switch is quickly reset after action so as to avoid burning out of the coils during tripping or closing; (2) a monitoring loop is arranged on the control power supply, once the control power supply loses power, the circuit breaker cannot be operated, and an acousto-optic signal is sent out to remind related personnel of processing in time; (3) obvious state indication signals exist for the opening and closing states of the circuit breaker; (4) the circuit breaker can not only manually switch on and off, but also automatically switch on and off.
After the existing switch cabinet is automatically switched on or manually switched on, an indicator lamp connected in series with a switching-off coil loop emits flat light with a preset color; after automatic switching-off or manual switching-off, the indicator lamp connected in series with the switching-on coil loop sends another preset color flat light, and the indicator lamps send the flat lights with different colors in different states to provide indication information of the operation state of the high-voltage cabinet for operators.
However, the operator needs to use the comprehensive protection device to further distinguish whether the opening and closing operation is manual operation or automatic operation, and the information cannot be obtained intuitively. Therefore, it is desirable to provide a circuit breaker opening and closing operation indicating device.
Disclosure of Invention
Embodiments of the present invention provide a circuit breaker opening and closing action indicating device in a high voltage switchgear that overcomes or at least partially solves the above problems.
The embodiment of the invention provides a circuit breaker opening and closing action indicating device in a high-voltage switch cabinet, which comprises a flashing small bus, a control switch, a first indicating lamp and a second indicating lamp, wherein the flashing small bus is connected with the control switch through a cable; wherein,
the flash small bus comprises a flash loop, the flash loop is connected in parallel between the flash small bus and a control bus of a circuit breaker, the flash small bus is respectively connected with a first contact and a second contact of the control switch, one end of a first indicator light is connected with a third contact of the control switch, the other end of the first indicator light is connected with an auxiliary normally open contact of the circuit breaker, one end of a second indicator light is connected with a fourth contact of the control switch, and the other end of the second indicator light is connected with a first auxiliary normally closed contact of the circuit breaker;
the flash circuit comprises a first flash circuit and a second flash circuit which are arranged in parallel, the first flash circuit comprises a flash relay normally closed contact, a flash relay coil and a resistor which are sequentially arranged in series, and a capacitor is connected in parallel at two ends of the flash relay coil; the second flash loop comprises a normally open contact of a flash relay;
when the control switch is in a post-trip state, the first contact and the third contact are connected, and when the control switch is in a post-closing state, the second contact and the fourth contact are connected.
The emergency sound loop comprises a buzzer, a fifth contact, a sixth contact, a seventh contact and an eighth contact of the control switch, and a second auxiliary normally closed contact of the circuit breaker, wherein the buzzer, the fifth contact, the sixth contact, the seventh contact and the eighth contact are sequentially connected in series;
when the control switch is in a post-trip state, the fifth contact and the sixth contact are connected, and the seventh contact and the eighth contact are connected.
Further, the control switch is LW2-YZ-1a, 4, 6a, 40, 20, 20/F8.
Further, the first indicator light emits red light when in operation, and the second indicator light emits green light when in operation.
Further, the emergency alarm device comprises a flashing small bus, a control switch, a first indicator light, a second indicator light and an accident sound loop; wherein,
the flash small bus comprises a flash loop, the flash loop is connected in parallel between the flash small bus and a control bus of a circuit breaker, the flash small bus is respectively connected with a first contact and a second contact of the control switch, one end of a first indicator light is connected with a third contact of the control switch, the other end of the first indicator light is connected with an auxiliary normally open contact of the circuit breaker, one end of a second indicator light is connected with a fourth contact of the control switch, and the other end of the second indicator light is connected with a first auxiliary normally closed contact of the circuit breaker;
the flash circuit comprises a first flash circuit and a second flash circuit which are arranged in parallel, the first flash circuit comprises a flash relay normally closed contact, a flash relay coil and a resistor which are sequentially arranged in series, and a capacitor is connected in parallel at two ends of the flash relay coil; the second flash loop comprises a normally open contact of a flash relay;
when the control switch is in a post-trip state, the first contact and the third contact are connected, and when the control switch is in a post-closing state, the second contact and the fourth contact are connected;
the emergency sound loop comprises a buzzer, a fifth contact, a sixth contact, a seventh contact and an eighth contact of the control switch, and a second auxiliary normally closed contact of the circuit breaker, which are sequentially connected in series;
the model of the control switch is LW2-YZ-1a, 4, 6a, 40, 20 and 20/F8;
the first indicator light emits red light when working, and the second indicator light emits green light when working.
According to the indicating device for the opening and closing actions of the circuit breaker in the high-voltage switch cabinet, provided by the embodiment of the invention, the flash small bus and the indicating lamp are added into the original circuit breaker control circuit, and the flash small bus and the indicating lamp are connected through different contacts of the control switch, so that the flash of the indicating lamp is realized by utilizing the principle that the circuit breaker is not corresponding to the control switch when the circuit breaker is automatically opened and closed, and an operator can intuitively acquire whether the opening and closing actions of the circuit breaker are manual operation or automatic operation through different forms of light emission of the indicating lamp.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a flash circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control circuit of a circuit breaker according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a circuit breaker opening and closing action indicating device in a high-voltage switch cabinet, which comprises a flashing small bus, a control switch, a first indicating lamp and a second indicating lamp, wherein the flashing small bus is connected with the control switch through a cable; wherein,
the flash small bus comprises a flash loop, the flash loop is connected in parallel between the flash small bus and a control bus of a circuit breaker, the flash small bus is respectively connected with a first contact and a second contact of the control switch, one end of a first indicator light is connected with a third contact of the control switch, the other end of the first indicator light is connected with an auxiliary normally open contact of the circuit breaker, one end of a second indicator light is connected with a fourth contact of the control switch, and the other end of the second indicator light is connected with a first auxiliary normally closed contact of the circuit breaker;
the flash circuit comprises a first flash circuit and a second flash circuit which are arranged in parallel, the first flash circuit comprises a flash relay normally closed contact, a flash relay coil and a resistor which are sequentially arranged in series, and a capacitor is connected in parallel at two ends of the flash relay coil; the second flash loop comprises a normally open contact of a flash relay;
when the control switch is in a post-trip state, the first contact and the third contact are connected, and when the control switch is in a post-closing state, the second contact and the fourth contact are connected.
Fig. 1 is a schematic diagram of a flash circuit according to an embodiment of the present invention, as shown in fig. 1, WTW represents a flash small bus, a flash relay normally-closed contact KM1, a flash relay coil KM, and a resistor R are sequentially and serially arranged in a first flash circuit, and a capacitor C is connected in parallel to two ends of the flash relay coil KM; the second flash circuit includes a flash relay normally open contact KM 2.
The principle of flashing is as follows: the test button SE is pressed down, the positive power supply of the control small bus is connected with the negative power supply of the control small bus through the normally closed contact KM1 of the flash relay, the capacitor C, the resistor R, the movable contact of the test button SE, the signal lamp HW and the resistor, the capacitor C starts to charge, the potential of the flash small bus is reduced, and further the signal lamp HW becomes dark due to the reduction of the voltage at the two ends. Along with the continuous rising of the charging voltage of the capacitor C connected in parallel at the two ends of the coil KM of the flash relay, when the flash relay reaches the action voltage of the flash relay, the flash relay acts, the normally open contact KM2 is closed, the two ends of the signal lamp HW become bright due to the rising of the voltage, and the potential of the flash small bus rises. Meanwhile, the normally-closed point KM1 of the flash relay is disconnected, the capacitor C stops charging, the capacitor C starts to discharge to a coil of the flash relay, when the voltage at the two ends of the capacitor C is reduced to the return voltage of the flash relay, the flash relay returns, the normally-open contact KM2 of the flash relay is disconnected, and HW becomes dark; normally closed contact KM1 closes and begins to charge capacitor C again. In this way, the signal lamp HW continuously flashes light when it is dark and bright, and the flashing small bus is low and high.
Specifically, when a circuit breaker control circuit is accessed, a test button SE is replaced by a control switch with more contacts, the control switch is correspondingly switched on or off by different contacts at different manual gears, and the specific situation is determined by the specific control switch model. The flash of light minibus is connected with control switch's first contact and second contact respectively, and the one end of first pilot lamp is connected with control switch's third contact, and the other end of first pilot lamp is connected with the supplementary normally open contact of circuit breaker, and the one end of second pilot lamp is connected with control switch's fourth contact, and the other end of second pilot lamp is connected with the first supplementary normally closed contact of circuit breaker. When the switch is manually switched on, the first indicator light emits flat light, and when the switch is manually tripped, the second indicator light emits flat light.
When the control switch is in a 'trip back' position, the first contact and the third contact are connected, if the automatic device controls the circuit breaker to automatically switch on at the moment, the auxiliary normally open contact of the circuit breaker is closed, the first auxiliary normally closed contact of the circuit breaker is disconnected, the current path is a flash small bus-the first contact-the third contact-the first indicator light-the auxiliary normally open contact of the circuit breaker-the negative electrode of the control small bus, under the action of a flash principle, the first indicator light flashes, and then when the first indicator light flashes, an operator can visually acquire the action of the circuit breaker as 'automatic switch on'. When an operator manually adjusts the control switch to the 'after-closing' position, the first contact and the third contact are disconnected, other contacts of the control switch are connected, and the first indicator lamp emits flat light.
When the control switch is in a 'post-closing' position, the second contact and the fourth contact are connected, if the automatic device controls the breaker to automatically trip at the moment, the auxiliary normally open contact of the breaker is disconnected, the first auxiliary normally closed contact of the breaker is closed, the current path is a flashing small bus-the second contact-the fourth contact-the second indicator light-the first auxiliary normally closed contact of the breaker-the negative electrode of the control small bus, the second indicator light flashes under the action of a flashing principle, and then when the second indicator light flashes, an operator can visually acquire the action of the breaker as 'automatic trip'. When an operator manually adjusts the control switch to the 'after-trip' position, the second contact and the fourth contact are disconnected, other contacts of the control switch are connected, and the second indicator light emits flat light.
According to the indicating device for the opening and closing actions of the circuit breaker in the high-voltage switch cabinet, provided by the embodiment of the invention, the flash small bus and the indicating lamp are added into the original circuit breaker control circuit, and the flash small bus and the indicating lamp are connected through different contacts of the control switch, so that the flash of the indicating lamp is realized by utilizing the principle that the circuit breaker is not corresponding to the control switch when the circuit breaker is automatically opened and closed, and an operator can intuitively acquire whether the opening and closing actions of the circuit breaker are manual operation or automatic operation through different forms of light emission of the indicating lamp.
In the above embodiment, the emergency sound system further comprises an emergency sound loop, and the emergency sound loop comprises a buzzer, a fifth contact, a sixth contact, a seventh contact, an eighth contact of the control switch, and a second auxiliary normally closed contact of the circuit breaker, which are sequentially connected in series;
when the control switch is in a post-trip state, the fifth contact and the sixth contact are connected, and the seventh contact and the eighth contact are connected.
Specifically, when the control switch is in a 'post-closing' position, if the circuit breaker trips due to a fault at the moment, the auxiliary normally open contact of the circuit breaker is opened, the first auxiliary normally closed contact of the circuit breaker is closed, the current path is a flashing small bus-a second contact-a fourth contact-a second indicator light-the first auxiliary normally closed contact of the circuit breaker-the negative electrode of the control small bus, and the second indicator light flashes under the action of a flashing principle. Meanwhile, the fifth contact is communicated with the sixth contact, the seventh contact is communicated with the eighth contact, the accident sound loop is electrified, and the buzzer buzzes. When the circuit breaker automatic tripping operation, operating personnel can judge that the circuit breaker is automatic tripping operation according to the flickering of the second indicating lamp, and can judge that the circuit breaker is automatic tripping operation according to the buzzing sound sent by the buzzer, so that the circuit breaker is informed of possible faults.
In the above embodiment, the control switch model is LW2-YZ-1a, 4, 6a, 40, 20, 20/F8.
Among them, the on states of all contacts of the LW2-YZ-1a, 4, 6a, 40, 20, 20/F8 type control switch at different positions are as follows:
position after closing: 1-3,9-10,16-13,19-17 contact is connected;
the switching-on position: 5-8,9-12,16-13,19-17 contact is connected;
preparing a switching-on position: 1-3,9-10,14-13,17-18 contact is connected;
preparing a brake separating position: 2-4,11-10,14-13,17-18 contact is connected;
the brake separating position: 6-7,11-10,14-15,18-20 contact is connected;
position after opening the brake: 2-4,11-10,14-15, 18-20 contact.
Correspondingly, the first contact, the second contact, the third contact, the fourth contact, the fifth contact, the sixth contact, the seventh contact and the eighth contact in the present embodiment correspond to the contact 14, the contact 9, the contact 15, the contact 10, the contact 1, the contact 3, the contact 19 and the contact 17 in the LW2-YZ-1a, 4, 6a, 40, 20, 20/F8 type control switch, respectively.
Specifically, fig. 2 is a schematic diagram of a circuit breaker control circuit using a LW2-YZ-1a, 4, 6a, 40, 20, 20/F8 type control switch according to an embodiment of the present invention, as shown in fig. 2.
If the breaker is in a tripping position, the control switch SA is in a 'tripping after' position, contacts 11-10 and 14-15 of the SA are connected, and if the automatic device enables the breaker to be automatically switched on, an auxiliary normally open contact of the SA is closed, and a normally closed contact of the SA is opened, so that only a loop where the contact 14-15 is located has current flowing through, and the current path is a flash small bus-FU-contact 14-contact 15-HR-auxiliary normally open contact-negative small bus of the SA. The first indicator light is connected to the flashing small bus, and the first indicator light flashes to indicate that the circuit breaker is automatically switched on. When an operator turns on the SA to the 'after-switch-on' position, the contacts 14-15 are disconnected, the contacts 16-13 are connected with the flat light control small bus, and the first indicator lamp emits flat light.
If the breaker is in the closing position, the control switch SA is in the 'after closing' position, contacts 9-10 and 16-13 of the SA are connected, if the breaker trips due to a fault, an auxiliary normally open and closed point of the device is opened, a normally closed contact is closed, so that current flows through a loop where the contacts 9-10 are located, the current path is a flash small bus-contact 9-contact 10-HG-first auxiliary normally closed contact-negative small bus of the breaker, a second indicator light is connected to the flash small bus, and the second indicator light flashes to indicate that the breaker trips automatically. When the operator turns the SA to the position of 'after trip', the contacts 9-10 are disconnected, the contacts 11-10 are connected with the flat light control small bus, and the second indicator light emits flat light again.
In addition, for the accident sound loop, the control switch SA is in a 'after closing' position, the contacts 1-3 and 19-17 are also connected, the accident sound loop is connected, and the buzzer sounds. The operator turns the SA to the "after trip" position, contacts 1-3 and 19-17 are both open, and the buzzer stops working.
It should be noted that the 1-3 contacts and the 19-17 contacts must be connected in series in the circuit, because if only one of the contacts is used, the circuit may be switched on at the moment when the control switch SA is turned to the "preparation switch-on" or "switch-on" position during the manual switch-on operation, and the accident sound signal is mistakenly sent, so that the operator cannot distinguish the circuit.
In the above embodiment, the first indicator light emits red light when operated, and the second indicator light emits green light when operated.
Specifically, when autoclosing, the first pilot lamp sends red flash of light, and when automatic tripping operation, the second pilot lamp sends green flash of light for operating personnel distinguishes the different actions of circuit breaker more easily.
In the above embodiment, the circuit breaker opening and closing action indicating device in the high-voltage switch cabinet comprises a flashing small bus, a control switch, a first indicator light, a second indicator light and an accident sound loop; wherein,
the flash small bus comprises a flash loop, the flash loop is connected in parallel between the flash small bus and a control bus of a circuit breaker, the flash small bus is respectively connected with a first contact and a second contact of the control switch, one end of a first indicator light is connected with a third contact of the control switch, the other end of the first indicator light is connected with an auxiliary normally open contact of the circuit breaker, one end of a second indicator light is connected with a fourth contact of the control switch, and the other end of the second indicator light is connected with a first auxiliary normally closed contact of the circuit breaker;
the flash circuit comprises a first flash circuit and a second flash circuit which are arranged in parallel, the first flash circuit comprises a flash relay normally closed contact, a flash relay coil and a resistor which are sequentially arranged in series, and a capacitor is connected in parallel at two ends of the flash relay coil; the second flash loop comprises a normally open contact of a flash relay;
when the control switch is in a post-trip state, the first contact and the third contact are connected, and when the control switch is in a post-closing state, the second contact and the fourth contact are connected;
the emergency sound loop comprises a buzzer, a fifth contact, a sixth contact, a seventh contact and an eighth contact of the control switch, and a second auxiliary normally closed contact of the circuit breaker, which are sequentially connected in series;
the model of the control switch is LW2-YZ-1a, 4, 6a, 40, 20 and 20/F8;
the first indicator light emits red light when working, and the second indicator light emits green light when working.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A circuit breaker opening and closing action indicating device in a high-voltage switch cabinet is characterized by comprising a flashing small bus, a control switch, a first indicating lamp and a second indicating lamp; wherein,
the flash small bus comprises a flash loop, the flash loop is connected in parallel between the flash small bus and a control bus of a circuit breaker, the flash small bus is respectively connected with a first contact and a second contact of the control switch, one end of a first indicator light is connected with a third contact of the control switch, the other end of the first indicator light is connected with an auxiliary normally open contact of the circuit breaker, one end of a second indicator light is connected with a fourth contact of the control switch, and the other end of the second indicator light is connected with a first auxiliary normally closed contact of the circuit breaker;
the flash circuit comprises a first flash circuit and a second flash circuit which are arranged in parallel, the first flash circuit comprises a flash relay normally closed contact, a flash relay coil and a resistor which are sequentially arranged in series, and a capacitor is connected in parallel at two ends of the flash relay coil; the second flash loop comprises a normally open contact of a flash relay;
when the control switch is in a post-trip state, the first contact and the third contact are connected, and when the control switch is in a post-closing state, the second contact and the fourth contact are connected.
2. The circuit breaker opening and closing action indicating device in the high-voltage switch cabinet according to claim 1, characterized by further comprising an accident sound loop, wherein the accident sound loop comprises a buzzer, a fifth contact, a sixth contact, a seventh contact, an eighth contact of the control switch and a second auxiliary normally closed contact of the circuit breaker which are sequentially connected in series;
when the control switch is in a post-trip state, the fifth contact and the sixth contact are connected, and the seventh contact and the eighth contact are connected.
3. The circuit breaker opening and closing action indicating device in the high-voltage switch cabinet according to claim 2, wherein the control switch is LW2-YZ-1a, 4, 6a, 40, 20, 20/F8.
4. The circuit breaker opening and closing action indicating device in the high-voltage switch cabinet as claimed in claim 1, wherein the first indicator light emits red light when in operation, and the second indicator light emits green light when in operation.
5. The circuit breaker opening and closing action indicating device in the high-voltage switch cabinet according to claim 1, which comprises a flashing small bus, a control switch, a first indicator light, a second indicator light and an accident sound loop; wherein,
the flash small bus comprises a flash loop, the flash loop is connected in parallel between the flash small bus and a control bus of a circuit breaker, the flash small bus is respectively connected with a first contact and a second contact of the control switch, one end of a first indicator light is connected with a third contact of the control switch, the other end of the first indicator light is connected with an auxiliary normally open contact of the circuit breaker, one end of a second indicator light is connected with a fourth contact of the control switch, and the other end of the second indicator light is connected with a first auxiliary normally closed contact of the circuit breaker;
the flash circuit comprises a first flash circuit and a second flash circuit which are arranged in parallel, the first flash circuit comprises a flash relay normally closed contact, a flash relay coil and a resistor which are sequentially arranged in series, and a capacitor is connected in parallel at two ends of the flash relay coil; the second flash loop comprises a normally open contact of a flash relay;
when the control switch is in a post-trip state, the first contact and the third contact are connected, and when the control switch is in a post-closing state, the second contact and the fourth contact are connected;
the emergency sound loop comprises a buzzer, a fifth contact, a sixth contact, a seventh contact and an eighth contact of the control switch, and a second auxiliary normally closed contact of the circuit breaker, which are sequentially connected in series;
the model of the control switch is LW2-YZ-1a, 4, 6a, 40, 20 and 20/F8;
the first indicator light emits red light when working, and the second indicator light emits green light when working.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232275.2A CN109300747B (en) | 2018-10-22 | 2018-10-22 | Switching-on and switching-off action indicating device of breaker in high-voltage switch cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232275.2A CN109300747B (en) | 2018-10-22 | 2018-10-22 | Switching-on and switching-off action indicating device of breaker in high-voltage switch cabinet |
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| CN109300747A true CN109300747A (en) | 2019-02-01 |
| CN109300747B CN109300747B (en) | 2023-12-19 |
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| CN201811232275.2A Active CN109300747B (en) | 2018-10-22 | 2018-10-22 | Switching-on and switching-off action indicating device of breaker in high-voltage switch cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601062A (en) * | 2019-10-11 | 2019-12-20 | 广东电网有限责任公司 | GIS combined electrical apparatus with status indicator lamp |
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| CN207947187U (en) * | 2018-01-19 | 2018-10-09 | 日新恒通电气有限公司 | A kind of control circuit of DC control switch |
| CN209374367U (en) * | 2018-10-22 | 2019-09-10 | 湖北长江电气有限公司 | A kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601062A (en) * | 2019-10-11 | 2019-12-20 | 广东电网有限责任公司 | GIS combined electrical apparatus with status indicator lamp |
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