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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- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
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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
-
- 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 present embodiments relate to technical field of electric control, more particularly, to a kind of high-tension switch cabinet inner breaker
Divide-shut brake operation indicator device.
Background technique
(such as KYN28 type high-tension switch cabinet) controls small bus and substantially meets breaker control in existing high-tension switch cabinet
It is required that, for example, (1) breaker closing and breaking coil are designed by brief energization, i.e., on-off switch is acting
It resets rapidly afterwards, in case coil can be burnt out when tripping or combined floodgate；(2) there is monitoring circuit to control power supply, once control power supply
Power loss, breaker will be unable to operate, and issue sound and light signal to remind the relevant personnel to handle in time；(3) for the division of breaker
Lock state has apparent condition indicative signal；(4) breaker can either manual divide-shut brake, while also being capable of automatic divide-shut brake.
For existing switchgear after automatic closing or closing by hand, the indicator light for being serially connected with opening coil circuit issues default face
Color zero diopter；After automatic brake separating or manual brake separating, the indicator light for being serially connected with closing coil circuit issues another pre-set color zero diopter,
The zero diopter that lamp indicated above issues different colours under different conditions can provide the finger of high-voltage board operating status for operator
Show information.
But operator is to be manually operated or be automatically brought into operation further differentiating divide-shut brake movement, it need to be by means of comprehensive
Protection device, and can not intuitively obtain above- mentioned information.Therefore, it is urgent to provide a kind of circuit-breaker switching on-off operation indicator devices.
Summary of the invention
The embodiment of the invention provides a kind of height for overcoming the above problem or at least being partially solved the above problem to press off
Close cabinet inner breaker divide-shut brake operation indicator device.
The embodiment of the invention provides a kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device, including flash of light are small
Bus, control switch, the first indicator light and the second indicator light；Wherein,
The small bus of the flash of light includes flash circuit, and the flash circuit is connected to the small bus of the flash of light and breaker
Between control bus, the small bus of the flash of light is connect with the first contact of the control switch and the second contact respectively, and described the
One end of one indicator light is connect with the third contact of the control switch, the other end and the breaker of first indicator light
The connection of auxiliary normally opened contact, one end of second indicator light connect with the 4th contact of the control switch, described second
The other end of indicator light is connect with the first auxiliary normally-closed contact of the breaker；
The flash circuit includes that the first flash circuit being arranged in parallel and the second flash circuit are in parallel, first flash of light
Circuit includes the flashing relay normally-closed contact, flashing relay coil and resistance for being sequentially connected in series setting, and the flash of light after
The both ends of electric apparatus coil are parallel with a capacitor；Second flash circuit includes flashing relay normally opened contact；
After the control switch is in tripping when state, first contact is connected with the third contact, when described
Control switch after closing a floodgate when state, connect with the 4th contact by second contact.
It further, further include accident signal circuit, and the accident signal circuit includes the buzzing for being sequentially connected in series setting
Device, the 5th contact of the control switch, the 6th contact, the 7th contact, the 8th contact and the breaker the second auxiliary
Normally-closed contact；
After the control switch is in tripping when state, the 5th contact is connected with the 6th contact, and described the
Seven contacts are connected with the 8th contact.
Further, the control switch model LW2-YZ-1a, 4,6a, 40,20,20/F8.
Further, it glows when first indicator light works, green light when second indicator light works.
Further, including the small bus of flash of light, control switch, the first indicator light, the second indicator light and accident signal circuit；
Wherein,
The small bus of the flash of light includes flash circuit, and the flash circuit is connected to the small bus of the flash of light and breaker
Between control bus, the small bus of the flash of light is connect with the first contact of the control switch and the second contact respectively, and described the
One end of one indicator light is connect with the third contact of the control switch, the other end and the breaker of first indicator light
The connection of auxiliary normally opened contact, one end of second indicator light connect with the 4th contact of the control switch, described second
The other end of indicator light is connect with the first auxiliary normally-closed contact of the breaker；
The flash circuit includes that the first flash circuit being arranged in parallel and the second flash circuit are in parallel, first flash of light
Circuit includes the flashing relay normally-closed contact, flashing relay coil and resistance for being sequentially connected in series setting, and the flash of light after
The both ends of electric apparatus coil are parallel with a capacitor；Second flash circuit includes flashing relay normally opened contact；
After the control switch is in tripping when state, first contact is connected with the third contact, when described
Control switch after closing a floodgate when state, connect with the 4th contact by second contact；
The accident signal circuit includes the buzzer for being sequentially connected in series setting, the 5th contact of the control switch, the 6th
Contact, the 7th contact, the 8th contact and the breaker the second auxiliary normally-closed contact；
The control switch model LW2-YZ-1a, 4,6a, 40,20,20/F8；
First indicator light glows when working, green light when second indicator light works.
A kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device provided in an embodiment of the present invention, by original
Glisten small bus and indicator light are added in circuit breaker control circuit, and passes 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 makes
The divide-shut brake movement that operator can intuitively obtain breaker by the luminous different form of indicator light is that manual operation is gone back
It is to be automatically brought into operation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of schematic illustration of flash circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of control circuit schematic diagram of breaker provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
The present invention provides a kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator devices, including the small bus that glistens,
Control switch, the first indicator light and the second indicator light；Wherein,
The small bus of the flash of light includes flash circuit, and the flash circuit is connected to the small bus of the flash of light and breaker
Between control bus, the small bus of the flash of light is connect with the first contact of the control switch and the second contact respectively, and described the
One end of one indicator light is connect with the third contact of the control switch, the other end and the breaker of first indicator light
The connection of auxiliary normally opened contact, one end of second indicator light connect with the 4th contact of the control switch, described second
The other end of indicator light is connect with the first auxiliary normally-closed contact of the breaker；
The flash circuit includes that the first flash circuit being arranged in parallel and the second flash circuit are in parallel, first flash of light
Circuit includes the flashing relay normally-closed contact, flashing relay coil and resistance for being sequentially connected in series setting, and the flash of light after
The both ends of electric apparatus coil are parallel with a capacitor；Second flash circuit includes flashing relay normally opened contact；
After the control switch is in tripping when state, first contact is connected with the third contact, when described
Control switch after closing a floodgate when state, connect with the 4th contact by second contact.
Wherein, Fig. 1 is a kind of schematic illustration of flash circuit provided in an embodiment of the present invention, as shown in Figure 1, WTW table
Show the small bus of flash of light, is sequentially connected in series in the first flash circuit and is provided with flashing relay normally-closed contact KM1, flashing relay coil
KM and resistance R, the both ends of the flashing relay coil KM are parallel with a capacitor C；Second flash circuit includes flash of light relay
Device normally opened contact KM2.
Flash Light principle is as follows: press test button SE, control small bus positive supply through flashing relay normally-closed contact KM1,
Capacitor C, resistance R, the moving together contact of test button SE, signal lamp HW and resistance are connected with small bus negative supply is controlled, and capacitor C is opened
Begin to charge, the small bus current potential that glistens reduces, and then signal lamp HW is dimmed because of the reduction of the voltage at both ends.Be connected in parallel on flash of light after
The capacitor C at the both ends electric apparatus coil KM is because charging voltage constantly increases, when reaching flashing relay operation voltage, flashing relay
Movement, normally opened contact KM2 closure, the both ends signal lamp HW brighten because voltage increases, and the small bus current potential that glistens increases.It dodges simultaneously
The normally closed point KM1 of optical relay is disconnected, and capacitor C stops charging, and capacitor C starts to flashing relay coil discharge, the both ends capacitor C electricity
When pressure drop is to flashing relay return voltage, flashing relay is returned, and normally opened contact KM2 is disconnected, and HW is again dimmed；Normally-closed contact
KM1 closure, and start to charge to capacitor C.So in cycles, the bright group flashing light of signal lamp HW mono- dark one, while small mother of glistening
Line current potential one low one is high.
Specifically, when accessing circuit breaker control circuit, the more control switch alternate test button SE in contact, control are utilized
System switch has different contacts to be switched on or switched off different manual gears is corresponding, and specific situation is by specific control switch type
Number determine.The small bus that glistens is connect with the first contact of control switch and the second contact respectively, one end of the first indicator light and control
The third contact connection of system switch, the other end of the first indicator light and the auxiliary normally opened contact of breaker connect, the second indicator light
One end and the 4th contact of control switch connect, the first auxiliary normally-closed contact of the other end of the second indicator light and breaker connects
It connects.The first indicator light issues zero diopter when closing by hand, and the second indicator light issues zero diopter when hand trip(ping).
When stating control switch and being in " after tripping " position, the first contact is connected with third contact, if automatic device at this time
Breaker automatic closing is controlled, the first auxiliary normally-closed contact of the auxiliary normally opened contact closure of breaker, breaker disconnects, electric current
Path is small the-the first contact of bus-the-the first indicator light of the third contact-breaker auxiliary normally opened contact-small bus of control of flash of light
Cathode, under the action of Flash Light principle, the first indicator light flashes, then when the first indicator light flashes, operator
It is " automatic closing " that member, which can intuitively obtain breaker actuation,.Control switch is adjusted to position " after combined floodgate " by operator manually
It sets, then the first contact and third contact disconnect, other contacts of control switch are connected, and the first indicator light issues zero diopter.
When control switch is in " after combined floodgate " position, the second contact is connected with the 4th contact, if automatic device control at this time
The auxiliary normally opened contact of breaker automatic trip processed, breaker disconnects, the first auxiliary normally-closed contact closure of breaker, electric current road
Diameter is the first auxiliary small mother of normally-closed contact-control of small-the four the-the second indicator light of contact of the-the second contact of the bus-breaker of flash of light
Line cathode, under the action of Flash Light principle, the second indicator light flashes, then when the second indicator light flashes, operation
It is " automatic trip " that personnel, which can intuitively obtain breaker actuation,.Control switch is adjusted to position " after tripping " by operator manually
It sets, then the second contact and the 4th contact disconnect, other contacts of control switch are connected, and the second indicator light issues zero diopter.
A kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device provided in an embodiment of the present invention, by original
Glisten small bus and indicator light are added in circuit breaker control circuit, and passes 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 makes
The divide-shut brake movement that operator can intuitively obtain breaker by the luminous different form of indicator light is that manual operation is gone back
It is to be automatically brought into operation.
It in the above-described embodiments, further include accident signal circuit, and the accident signal circuit includes being sequentially connected in series setting
Buzzer, the 5th contact of the control switch, the 6th contact, the 7th contact, the 8th contact and the breaker
Two auxiliary normally-closed contacts；
After the control switch is in tripping when state, the 5th contact is connected with the 6th contact, and described the
Seven contacts are connected with the 8th contact.
Specifically, when control switch is in " after combined floodgate " position, if breaker is because of fault trip at this time, breaker
Normally opened contact is assisted to disconnect, the first auxiliary normally-closed contact closure of breaker, current path is small the-the second contact of bus-of glistening
4th the-the second indicator light of contact-breaker first assists the small bus cathode of normally-closed contact-control, in the effect of Flash Light principle
Under, the second indicator light flashes.Meanwhile the 5th contact connected with the 6th contact, the 7th contact is connected with the 8th contact, accident
Audio loop is powered, and buzzer issues buzzing.So in breaker automatic trip, operator can not only refer to according to second
Show that the flashing of lamp judges breaker for automatic trip, can also judge that breaker is jumped to be automatic according to the buzzer that buzzer issues
Lock, and then know that breaker is likely to occur failure.
In the above-described embodiments, the control switch model LW2-YZ-1a, 4,6a, 40,20,20/F8.
Wherein, LW2-YZ-1a, the full contact of 4,6a, 40,20,20/F8 type control switches connecing in different location as follows
Logical state is as follows:
Position after combined floodgate: the contact 1-3,9-10,16-13,19-17 is connected；
Closing position: the contact 5-8,9-12,16-13,19-17 is connected；
Preparation closing position: the contact 1-3,9-10,14-13,17-18 is connected；
Preparation open position: the contact 2-4,11-10,14-13,17-18 is connected；
Open position: the contact 6-7,11-10,14-15,18-20 is connected；
Position after separating brake: the contact 2-4,11-10,14-15,18-20 is connected.
Accordingly, the first contact, the second contact, third contact, the 4th contact, the 5th contact, the 6th touching in the present embodiment
Point, the 7th contact and the 8th contact correspond respectively to LW2-YZ-1a, the contact in 4,6a, 40,20,20/F8 type control switches
14, contact 9, contact 15, contact 10, contact 1, contact 3, contact 19 and contact 17.
Specifically, Fig. 2 is provided in an embodiment of the present invention a kind of using LW2-YZ-1a, 4,6a, 40,20,20/F8 type controls
The circuit breaker control circuit schematic diagram of switch is made, as shown in Figure 2.
If breaker is connected in trip position, control switch SA in " after tripping " position, the contact 11-10 with 14-15 of SA,
And if automatic device makes breaker automatic closing, auxiliary normally opened contact closure, normally-closed contact disconnection, so only contact at this time
Circuit where 14-15 has electric current to flow through, and the path of electric current is the auxiliary of the contact the small bus-FU- contact 14- 15-HR- breaker of glistening
Help the small bus of normally opened contact-cathode.First indicator light is connected to the small bus of flash of light, and the first instruction flick of lamp shows that breaker is automatic
It closes a floodgate.Operator turns SA to " after combined floodgate " position, then contact 14-15 is disconnected, and contact 16-13 connects zero diopter and controls small mother
Line, the first indicator light issue zero diopter.
If breaker, in closing position, control switch SA is in " after combined floodgate " position, the contact 9-10 and 16-13 of SA is connect
It is logical, if equipment causes circuit breaker trip because of failure, normally opened close point is assisted to disconnect, normally-closed contact closure, so 9-10 is touched
Circuit where point has electric current to flow through, and current path is that the first auxiliary of the small bus-contact contact the 9- 10-HG- breaker of flash of light is normal
The small bus of closed contact-cathode, the second indicator light are connected to the small bus of flash of light, and the second instruction flick of lamp indicates breaker automatic trip.
Operator turns SA to " after tripping " position, then contact 9-10 is disconnected, and contact 11-10 connects zero diopter and controls small bus, and second
Indicator light sends out zero diopter again.
In addition, control switch SA is in " after combined floodgate " position for accident signal circuit, contact 1-3 and 19-17 are also connect
Logical, then accident signal circuit is connected, and buzzer issues sound equipment.Operator turns SA to " after tripping " position, contact 1-3 and
19-17 is disconnected, and buzzer stops working.
It should be noted that the contact 1-3 and the contact 19-17 must be connected in series and be connected in circuit, because if only with wherein
One contact, then in closing by hand operating process, when control switch SA goes to " preparation is closed a floodgate " or " combined floodgates " position moment, time
Road may will be switched on, and accidentally send out accident signal signal, operator is made to be difficult to distinguish.
In the above-described embodiments, it glows when first indicator light works, green light when second indicator light works.
Specifically, when automatic closing, the first indicator light issues red flashing light, when automatic trip, the second indicator light hair
Flashed green out, so that operator more easily discriminates the different movements of breaker.
In the above-described embodiments, a kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device, including the small mother of flash of light
Line, control switch, the first indicator light, the second indicator light and accident signal circuit；Wherein,
The small bus of the flash of light includes flash circuit, and the flash circuit is connected to the small bus of the flash of light and breaker
Between control bus, the small bus of the flash of light is connect with the first contact of the control switch and the second contact respectively, and described the
One end of one indicator light is connect with the third contact of the control switch, the other end and the breaker of first indicator light
The connection of auxiliary normally opened contact, one end of second indicator light connect with the 4th contact of the control switch, described second
The other end of indicator light is connect with the first auxiliary normally-closed contact of the breaker；
The flash circuit includes that the first flash circuit being arranged in parallel and the second flash circuit are in parallel, first flash of light
Circuit includes the flashing relay normally-closed contact, flashing relay coil and resistance for being sequentially connected in series setting, and the flash of light after
The both ends of electric apparatus coil are parallel with a capacitor；Second flash circuit includes flashing relay normally opened contact；
After the control switch is in tripping when state, first contact is connected with the third contact, when described
Control switch after closing a floodgate when state, connect with the 4th contact by second contact；
The accident signal circuit includes the buzzer for being sequentially connected in series setting, the 5th contact of the control switch, the 6th
Contact, the 7th contact, the 8th contact and the breaker the second auxiliary normally-closed contact；
The control switch model LW2-YZ-1a, 4,6a, 40,20,20/F8；
First indicator light glows when working, green light when second indicator light works.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (5)
1. a kind of high-tension switch cabinet inner breaker divide-shut brake operation indicator device, which is characterized in that including the small bus, control of glistening
Switch, the first indicator light and the second indicator light；Wherein,
The small bus of flash of light includes flash circuit, and the flash circuit is connected to the control of the flash of light small bus and breaker
Between bus, the small bus of flash of light is connect with the first contact of the control switch and the second contact respectively, and described first refers to
The one end for showing lamp is connect with the third contact of the control switch, and the other end of first indicator light is auxiliary with the breaker
Normally opened contact is helped to connect, one end of second indicator light is connect with the 4th contact of the control switch, second instruction
The other end of lamp is connect with the first auxiliary normally-closed contact of the breaker；
The flash circuit includes that the first flash circuit being arranged in parallel and the second flash circuit are in parallel, first flash circuit
Flashing relay normally-closed contact, flashing relay coil and resistance including being sequentially connected in series setting, and the flashing relay
The both ends of coil are parallel with a capacitor；Second flash circuit includes flashing relay normally opened contact；
After the control switch is in tripping when state, first contact is connected with the third contact, when the control
Switch after closing a floodgate when state, connect with the 4th contact by second contact.
2. high-tension switch cabinet inner breaker divide-shut brake operation indicator device according to claim 1, which is characterized in that further include
Accident signal circuit, and the accident signal circuit includes the buzzer for being sequentially connected in series setting, the 5th touching of the control switch
Point, the 6th contact, the 7th contact, the 8th contact and the breaker the second auxiliary normally-closed contact；
After the control switch is in tripping when state, the 5th contact is connected with the 6th contact, the 7th touching
Point is connected with the 8th contact.
3. high-tension switch cabinet inner breaker divide-shut brake operation indicator device according to claim 2, which is characterized in that the control
It makes and switchs model LW2-YZ-1a, 4,6a, 40,20,20/F8.
4. high-tension switch cabinet inner breaker divide-shut brake operation indicator device according to claim 1, which is characterized in that described
One indicator light glows when working, green light when second indicator light works.
5. high-tension switch cabinet inner breaker divide-shut brake operation indicator device according to claim 1, which is characterized in that including dodging
The small bus of light, control switch, the first indicator light, the second indicator light and accident signal circuit；Wherein,
The small bus of flash of light includes flash circuit, and the flash circuit is connected to the control of the flash of light small bus and breaker
Between bus, the small bus of flash of light is connect with the first contact of the control switch and the second contact respectively, and described first refers to
The one end for showing lamp is connect with the third contact of the control switch, and the other end of first indicator light is auxiliary with the breaker
Normally opened contact is helped to connect, one end of second indicator light is connect with the 4th contact of the control switch, second instruction
The other end of lamp is connect with the first auxiliary normally-closed contact of the breaker；
The flash circuit includes that the first flash circuit being arranged in parallel and the second flash circuit are in parallel, first flash circuit
Flashing relay normally-closed contact, flashing relay coil and resistance including being sequentially connected in series setting, and the flashing relay
The both ends of coil are parallel with a capacitor；Second flash circuit includes flashing relay normally opened contact；
After the control switch is in tripping when state, first contact is connected with the third contact, when the control
Switch after closing a floodgate when state, connect with the 4th contact by second contact；
The accident signal circuit include the buzzer for being sequentially connected in series setting, the 5th contact of the control switch, the 6th contact,
Second auxiliary normally-closed contact of the 7th contact, the 8th contact and the breaker；
The control switch model LW2-YZ-1a, 4,6a, 40,20,20/F8；
First indicator light glows when working, green light when second indicator light works.
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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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| CN109300747B CN109300747B (en) | 2023-12-19 |
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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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| CN101090185A (en) * | 2007-04-24 | 2007-12-19 | 钱加灿 | Universal safety plug with earth wire hot-line alarm |
| 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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| CN109300747B (en) | 2023-12-19 |
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