CN217741960U - Fire-fighting emergency lighting system - Google Patents
Fire-fighting emergency lighting system Download PDFInfo
- Publication number
- CN217741960U CN217741960U CN202122101115.8U CN202122101115U CN217741960U CN 217741960 U CN217741960 U CN 217741960U CN 202122101115 U CN202122101115 U CN 202122101115U CN 217741960 U CN217741960 U CN 217741960U
- Authority
- CN
- China
- Prior art keywords
- lighting
- emergency lighting
- distribution box
- fire
- normal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a fire emergency lighting system to more simple and convenient and reliable mode realizes fire emergency lighting. The fire emergency lighting system includes: a normal lighting load; an emergency lighting device; the incoming line end of the lighting distribution box is connected to a mains supply, and the output end of the lighting distribution box is connected with the normal lighting load; the phase sequence relay comprises a wiring point and a contact, the wiring point is connected with a wire inlet end of the lighting distribution box, and the contact is connected with the emergency lighting equipment; wherein the phase sequence relay is configured to: when an electric signal input into the lighting distribution box is normal, the contact is in a disconnected state; when the electrical signal input into the lighting distribution box is abnormal, the contact is in a closed state so as to trigger the emergency lighting equipment to provide emergency lighting.
Description
Technical Field
The utility model relates to the technical field of lighting technology, especially, relate to a fire emergency lighting system.
Background
Technical standard for fire emergency lighting and evacuation indication systems GB51309-2018 no 3.6.7 states: under the non-fire state, after the normal lighting power supply of any fire prevention subarea and floor is powered off, a centralized power supply or an emergency lighting distribution box for distributing power for the lamps arranged in the area needs to be in a main power supply state to control the non-continuous lighting lamps connected with the centralized power supply or the emergency lighting distribution box to be in emergency lighting in a linkage mode.
Based on the above requirements, it is desirable to provide a solution that can monitor the normal lighting power state and enable fire emergency lighting in the event of an anomaly. At present, the existing scheme is mainly to install a fire power monitoring host in a fire control room, install a power monitoring module in a normal lighting distribution box, and monitor the state of a normal lighting power supply, wherein the fire power monitoring host grasps the state of the normal lighting power supply through communication with the power monitoring module, and controls the power monitoring module to output a chain power connection signal to an emergency lighting lamp after the normal lighting power supply loses power, so as to drive the emergency lighting lamp to light. However, the scheme not only increases the complexity of the fire-fighting power supply monitoring system, but also can cause the problem of unreliable actions caused by communication faults, thereby improving the potential accident risk.
Therefore, there is a need for a more simple and reliable fire emergency lighting solution.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a fire emergency lighting system to more simple and convenient and reliable mode realizes fire emergency lighting.
The embodiment of the utility model provides an adopt following technical scheme:
an embodiment of the utility model provides a fire emergency lighting system, include:
a normal lighting load;
an emergency lighting device;
the incoming line end of the lighting distribution box is connected to a mains supply, and the output end of the lighting distribution box is connected with the normal lighting load;
the phase sequence relay comprises a wiring point and a contact, the wiring point is connected with a wire inlet end of the lighting distribution box, and the contact is connected with the emergency lighting equipment;
wherein the phase sequence relay is configured to: when the electric signal input into the lighting distribution box is normal, the contact is in a disconnected state; when the electrical signal input into the lighting distribution box is abnormal, the contact is in a closed state so as to trigger the emergency lighting equipment to provide emergency lighting.
Optionally, lighting power distribution box's inlet wire end includes inlet wire switch and generating line, inlet wire switch's first end is connected to the commercial power, inlet wire switch's second end with lighting power distribution box's output respectively with the generating line is connected.
Optionally, the terminal is connected to the second end of the service switch or the bus bar.
Optionally, the lighting distribution box further comprises a control switch, and the control switch is connected between the bus bar and the normal lighting load in series.
Optionally, the number of the normal lighting loads and the number of the control switches are both multiple, and the control switches correspond to the normal lighting loads one to one;
the plurality of normal lighting loads are connected in parallel, and the control switch is connected between the bus and the corresponding normal lighting load in series.
Optionally, lighting power distribution box still includes surge protector, surge protector's first end with service entrance switch's second end is connected, surge protector's second end ground connection.
Optionally, the lighting power distribution box further comprises a first fuse, and the first fuse is connected in series between the second end of the incoming line switch and the first end of the surge protector.
Optionally, the emergency lighting apparatus comprises a fire alarm device and an emergency lighting load;
the input end of the fire alarm device is connected with the contact, and the output end of the fire alarm device is connected with the emergency lighting load so as to drive the emergency lighting load to work according to the opening and closing state of the contact.
Optionally, the input end of the fire alarm device is electrically connected to the contact through an interlock control line, and the output end of the fire alarm device is electrically connected to the emergency lighting load through an interlock control line.
Optionally, the fire emergency lighting system further comprises a second fuse connected in series between the incoming line end of the lighting distribution box and the junction point.
The embodiment of the utility model provides an above-mentioned at least one technical scheme who adopts can reach following beneficial effect:
the method comprises the following steps that a phase sequence relay is adopted, a wiring point of the phase sequence relay is connected with a wire inlet end of a lighting distribution box, and a contact of the phase sequence relay is connected with emergency lighting equipment, so that the phase sequence relay can detect whether abnormal conditions such as phase loss, phase dislocation, overvoltage, undervoltage, three-phase voltage unbalance, zero line disconnection and the like occur in an electric signal input into the lighting distribution box, and can trigger the contact to be disconnected or closed according to whether the electric signal input into the lighting distribution box is abnormal, wherein when the electric signal input into the lighting distribution box is normal, the contact is in a disconnected state, so that the lighting distribution box can convey received commercial power to a normal lighting load, and the emergency lighting equipment does not work at the moment, and normal lighting is realized; when the electrical signal input into the lighting distribution box is abnormal, the contact is in a closed state, so that the emergency lighting equipment is triggered to provide emergency lighting. Therefore, the embodiment of the utility model provides a fire emergency lighting system, through phase sequence relay alright realize the control to normal lighting power state and the fire emergency lighting when normal lighting power is unusual, compare in current power monitoring scheme, need not to adopt the communication and the monitoring device of load, not only realize portably, save cost of manufacture and operation power loss, can also avoid unreliable action that communication trouble brought, reduce latent accident risk, provide reliable fire emergency lighting.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic structural diagram of a fire emergency lighting system according to an exemplary embodiment of the present invention.
Description of reference numerals:
1-normal lighting load, 2-emergency lighting equipment, 21-fire alarm device, 22-emergency lighting load,
3-lighting distribution box,
31-incoming line switch, 32-bus, 33-control switch, 34-surge protector, 35-first fuse,
4-phase sequence relay, 5-second fuse.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that embodiments of the invention may be practiced otherwise than as specifically illustrated and described herein. In the present specification and claims, "and/or" indicates at least one of the connected objects, and the character "/" generally indicates that the preceding and following related objects are in an "or" relationship.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, for the embodiment of the utility model provides a fire emergency lighting system's that provides a structural schematic diagram, this fire emergency lighting system includes normal lighting load 1, emergency lighting equipment 2, lighting distribution box 3 and phase sequence relay.
The incoming line end of the lighting distribution box 3 is connected to the commercial power, the output end of the lighting distribution box 3 is connected with the normal lighting load 1, the commercial power received by the incoming line end can be reasonably distributed to the normal lighting load 1 by the lighting distribution box 3, the normal lighting load 1 provides lighting, and normal lighting is achieved.
The phase sequence relay comprises a wiring point and a contact K1, the wiring point is connected with the wire inlet end of the lighting distribution box 3, and the contact K1 is connected with the emergency lighting equipment 2. The phase-sequence relay 4 is configured to: when the electric signal input into the lighting distribution box 3 is normal, the contact K1 is in a disconnected state; when the electrical signal input into the lighting distribution box 3 is abnormal, the contact K1 is in a closed state to trigger the emergency lighting device 2 to provide emergency lighting.
Through the embodiment of the utility model provides a fire control emergency lighting system, adopt phase sequence relay 4 and connect phase sequence relay 4's binding post with lighting distribution box 3's inlet wire end, be connected phase sequence relay 4's contact K1 with emergency lighting apparatus 2, make phase sequence relay 4 can detect the signal of telecommunication of input lighting distribution box 3 and whether appear the unusual circumstances such as open phase, the wrong phase, excessive pressure, under-voltage, three-phase voltage unbalance and zero line broken string, and can trigger contact K1 disconnection or closure according to whether the signal of telecommunication of input lighting distribution box 3 is unusual, wherein, when the signal of telecommunication of input lighting distribution box 3 is normal, contact K1 is in the off-state, make lighting distribution box 3 can be with received commercial power transport to normal lighting load 1, and emergency lighting apparatus 2 is out of work this moment, realize normal lighting; when the electric signal input into the lighting distribution box 3 is abnormal, the contact K1 is in a closed state, thereby triggering the emergency lighting device 2 to provide emergency lighting. Therefore, the embodiment of the utility model provides a fire emergency lighting system, through phase sequence relay 4 alright realize the control to normal lighting power state and the fire emergency lighting when normal lighting power is unusual, compare in current power monitoring scheme, need not to adopt the communication and the monitoring device of load, not only realize portably, save cost of manufacture and operation power loss, can also avoid unreliable action that communication trouble brought, reduce latent accident risk, provide reliable fire emergency lighting.
The embodiment of the utility model provides an among the fire emergency lighting system, normal lighting load 1 can include arbitrary appropriate, have the components and parts of illumination function, the utility model provides a do not do specifically to this and restrict. As an alternative embodiment, the normal lighting load 1 may include a lamp, such as a Light Emitting Diode (LED) lamp, an energy saving lamp, an incandescent lamp, and the like.
In the utility model discloses among the fire emergency lighting system of embodiment, lighting distribution box 3 can have arbitrary suitable structure. As shown in fig. 1, as an alternative embodiment, the incoming line terminal of the lighting distribution box 3 may include an incoming line switch 31 and a bus bar 32, wherein a first end of the incoming line switch 31 is connected to the utility power, and a second end of the incoming line switch 31 and an output end of the lighting distribution box 3 are respectively connected to the bus bar 32, that is, the normal lighting load 1 is connected to the bus bar 32 through the output end of the lighting distribution box 3. Specifically, when the incoming line switch 31 is closed, the commercial power is transmitted to the bus 32 of the lighting distribution box 3, and the bus 32 distributes the commercial power to the normal lighting load 1, so that the normal lighting function is started; when the incoming line switch 31 is turned off, the lighting distribution box 3 is not electrified, so that the normal lighting load 1 stops working, and the normal lighting function is turned off.
It should be noted that, in the embodiment of the present invention, the incoming line switch 31 may be any suitable device with a switch function, and the embodiment of the present invention is not limited to this specifically. For example, the service switch 31 may be a miniature circuit breaker, thereby also providing a double protection function for overload and short circuit of the lighting distribution box 3.
It can be understood that, adopt inlet wire switch 31 and generating line 32 through the inlet wire end at lighting distribution box 3, generating line 32 is connected to the commercial power through inlet wire switch 31, normal lighting load 1 is connected to on generating line 32 through lighting distribution box 3's output, can realize unifying 1 distribution electric energy for normal lighting load by generating line 32, and the break-make through control inlet wire switch 31 realizes opening and closing normal lighting function, not only can simplify lighting distribution box 3's electric energy distribution operation from this, improve electric energy distribution efficiency, can also simplify lighting distribution box 3's inner structure, reduce the inside volume of lighting distribution box 3.
In order to improve the reliability of the phase sequence relay 4 and avoid accident risk caused by false operation of the phase sequence relay 4, as an optional implementation manner, the contact K1 of the phase sequence relay 4 may be a normally open contact K1. Therefore, when the electric signal input into the lighting distribution box 3 is normal, the contact K1 of the phase sequence relay 4 keeps a disconnected state, and at the moment, the commercial power is transmitted to the normal lighting load 1 through the lighting distribution box 3 and is provided with lighting by the normal lighting load 1; when the electrical signal input into the lighting distribution box 3 is abnormal, the wiring point of the phase sequence relay 4 detects the abnormality to trigger the contact K1 to close, thereby triggering the emergency lighting device 2 to provide emergency lighting.
In order to ensure that the phase sequence relay 4 can accurately detect abnormal conditions such as phase loss, phase dislocation, overvoltage, undervoltage, three-phase voltage imbalance, zero line disconnection and the like of the electric signal input into the lighting distribution box 3, in the above embodiment, the connection point of the phase sequence relay 4 may be connected with the second end of the incoming line switch 31 or the bus 32. Fig. 1 is only illustrated in a case where the phase-sequence relay 4 is connected to the bus bar 32.
With continued reference to fig. 1, as another alternative embodiment, the lighting distribution box 3 may further include a control switch 33, wherein the control switch 33 is connected in series between the bus bar 32 and the normal lighting load 1. Therefore, the connection between the bus 32 and the normal lighting load 1 can be switched on or off by controlling the on or off of the control switch 33, and further, when the electric signal input into the lighting distribution box 3 is normal, the normal lighting load 1 is powered on or powered off, so that the effect of flexibly controlling the normal lighting load 1 is achieved, and the user requirements are better met.
The embodiment of the utility model provides an among the fire emergency lighting system, control switch 33 can be for arbitrary suitable type, the device that has the switch function, the embodiment of the utility model provides a do not do specifically to this and restrict. For example, the incoming switch 31 may be a miniature circuit breaker, thereby also providing a double protection function for overload and short circuit of the normal lighting load 1.
The utility model discloses among the fire emergency lighting system, control switch 33 and normal lighting load 1 all can have arbitrary suitable quantity, and specific quantity can set up according to actual need, and this specification embodiment does not do specifically to this and restricts. In order to achieve a more flexible normal lighting effect, as shown in fig. 1, the number of the normal lighting loads 1 and the number of the control switches 33 are both multiple, and the control switches 33 are in one-to-one correspondence with the normal lighting loads 1, wherein the multiple normal lighting loads 1 are connected in parallel, and the control switches 33 are connected in series between the corresponding normal lighting loads 1 and the bus bars 32 of the lighting distribution box 3 to turn on or off the connection between the bus bars 32 and the corresponding normal lighting loads 1, so that the corresponding normal lighting loads 1 are powered on or off. Therefore, in practical application, related personnel can select to conduct part or all of the normal lighting load 1 according to actual needs.
With continued reference to fig. 1, as another alternative embodiment, the lighting distribution box 3 may further include a surge protector 34, wherein a first end of the surge protector 34 is connected to a second end of the incoming line switch 31, and a second end of the surge protector 34 is grounded. From this, when the incoming line end of lighting distribution box 3 suddenly produces spike current or voltage because of external interference, surge protector 34 can switch on the reposition of redundant personnel in short time to avoid the surge to lighting distribution box 3 and normal lighting load 1's harm, provide safety protection for lighting distribution box 3 and normal lighting load 1.
With continued reference to fig. 1, as another alternative embodiment, the lighting distribution box 3 may further include a first fuse 35, and the first fuse 35 is connected in series between the second end of the incoming line switch 31 and the first end of the surge protector 34. Therefore, when the current input to the lighting distribution box 3 exceeds the predetermined value, the first fuse 35 can disconnect the connection between the commercial power and the surge protector 34, thereby performing an overcurrent protection function on the surge protector 34 and further enhancing a safety protection function on the lighting distribution box 3 and the normal lighting load 1.
In the fire emergency lighting system of the embodiment of the utility model, the emergency lighting device 2 can have any appropriate structure. Referring again to fig. 1, as an alternative embodiment, the emergency lighting device 2 may include a fire alarm device 21 and an emergency lighting load 22, wherein an input terminal of the fire alarm device 21 is connected to the contact K1 of the phase sequence relay 4, and an output terminal of the fire alarm device 21 is connected to the emergency lighting load 22.
The emergency lighting load 22 may include any suitable components with emergency lighting functionality, and the embodiments of the invention are not limited in this respect. As an alternative embodiment, the emergency lighting load 22 may include an emergency light.
The fire alarm device 21 can drive the emergency lighting load 22 to operate according to the open and closed states of the contact K1 of the phase-sequence relay 4. Specifically, when the contact K1 of the phase-sequence relay 4 is in the closed state, the fire alarm device 21 drives the emergency lighting load 22 to start working, and the emergency lighting load 22 provides emergency lighting; when the contact K1 of the phase-sequence relay 4 is in the open state, the fire alarm device 21 drives the emergency lighting load 22 to stop operating.
Of course, the fire alarm device 21 may also have a fire detection function, and further, may also actively detect a fire in a spatial location and drive the emergency lighting load 22 to operate according to the detected fire. Specifically, the fire alarm device 21 may include a fire detector for detecting a fire and a controller for controlling the operation of the emergency lighting load 22, and the controller is connected to the fire detector and the emergency lighting load 22, respectively, to control the operation of the emergency lighting load 22 when the fire detector detects the fire.
It can be understood that the emergency lighting device 2 employs the fire alarm device 21 and the emergency lighting load 22, so that the emergency lighting load 22 can be controlled automatically and intelligently, and is easy to implement.
The embodiment of the utility model provides an among the fire control emergency lighting system, between the input of fire alarm device 21 and the contact K1 and between the output of fire alarm device 21 and the emergency lighting load 22 the arbitrary suitable mode of accessible is connected, and concrete joining mode can set up according to actual need, the embodiment of the utility model provides a do not do specifically to this and prescribe a limit to. In order to ensure the interlock control of the emergency lighting load 22 and improve the safety of fire emergency lighting, as an alternative embodiment, the input end of the fire alarm device 21 and the contact K1 may be electrically connected through an interlock control line, and the output end of the fire alarm device 21 and the emergency lighting load 22 are electrically connected through an interlock control line.
In another embodiment, the fire emergency lighting system of the embodiment of the present invention may further include a second fuse 5, wherein the second fuse 5 is connected in series between the incoming line end of the lighting distribution box 3 and the connection point of the phase sequence relay 4. Specifically, as shown in fig. 1, the second fuse 5 is connected in series between the bus bar 32 of the lighting distribution box 3 and the connection point of the phase-sequence relay 4. From this, can play the overcurrent protection effect to phase sequence relay 4 through second fuse 5 to strengthen the safety protection to emergency lighting equipment 2, further improve fire emergency lighting system's reliability and security.
In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Claims (10)
1. A fire emergency lighting system, comprising:
a normal lighting load;
an emergency lighting device;
the incoming line end of the lighting distribution box is connected to a mains supply, and the output end of the lighting distribution box is connected with the normal lighting load;
the phase sequence relay comprises a wiring point and a contact, the wiring point is connected with a wire inlet end of the lighting distribution box, and the contact is connected with the emergency lighting equipment;
wherein the phase sequence relay is configured to: when the electric signal input into the lighting distribution box is normal, the contact is in a disconnected state; when the electrical signal input into the lighting distribution box is abnormal, the contact is in a closed state so as to trigger the emergency lighting equipment to provide emergency lighting.
2. The fire emergency lighting system according to claim 1, wherein the lighting panel inlet end comprises an inlet switch and a bus, a first end of the inlet switch is connected to the mains supply, and a second end of the inlet switch and an output end of the lighting panel are respectively connected to the bus.
3. A fire emergency lighting system as in claim 2, wherein said junction is connected to a second end of said inlet switch or said bus bar.
4. A fire emergency lighting system as in claim 2, wherein the lighting distribution box further comprises a control switch, the control switch being connected in series between the bus bar and the normal lighting load.
5. A fire emergency lighting system as in claim 4, wherein there are a plurality of said normal lighting loads and a plurality of said control switches, said control switches corresponding one-to-one to said normal lighting loads;
the plurality of normal lighting loads are connected in parallel, and the control switch is connected in series between the bus and the corresponding normal lighting load.
6. A fire emergency lighting system as in claim 2, wherein said lighting distribution box further comprises a surge protector, a first end of said surge protector is connected to a second end of said inlet switch, and a second end of said surge protector is grounded.
7. A fire emergency lighting system as in claim 6, wherein said lighting distribution box further comprises a first fuse connected in series between said second end of said inlet switch and said first end of said surge protector.
8. A fire emergency lighting system as in claim 1, wherein the emergency lighting device comprises a fire alarm device and an emergency lighting load;
the input end of the fire alarm device is connected with the contact, and the output end of the fire alarm device is connected with the emergency lighting load so as to drive the emergency lighting load to work according to the on-off state of the contact.
9. A fire emergency lighting system as in claim 8, wherein the input of the fire alarm device is electrically connected to the contacts via an interlock control line, and the output of the fire alarm device is electrically connected to the emergency lighting load via an interlock control line.
10. A fire emergency lighting system as in claim 1, further comprising a second fuse connected in series between the inlet line end of the light distribution box and the junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122101115.8U CN217741960U (en) | 2021-09-01 | 2021-09-01 | Fire-fighting emergency lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122101115.8U CN217741960U (en) | 2021-09-01 | 2021-09-01 | Fire-fighting emergency lighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217741960U true CN217741960U (en) | 2022-11-04 |
Family
ID=83811951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122101115.8U Active CN217741960U (en) | 2021-09-01 | 2021-09-01 | Fire-fighting emergency lighting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217741960U (en) |
-
2021
- 2021-09-01 CN CN202122101115.8U patent/CN217741960U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20160181781A1 (en) | String and system employing direct current electrical generating modules and a number of string protectors | |
| JP2013534125A (en) | Method and photovoltaic installation for limiting the generator voltage of photovoltaic installations in hazardous situations | |
| CN110901449B (en) | Alternating-current charging stake relay detects and controlling means and alternating-current charging stake | |
| WO2009081912A1 (en) | Dc power distribution system | |
| CN100391072C (en) | Apparatus for monitoring neutral wire and earth wire, and electric switch device containing the same | |
| KR102145266B1 (en) | System and method for monitoring power system | |
| CN103782513A (en) | Photovoltaic module | |
| CN103378577A (en) | Power supply control device of household appliance and air conditioner | |
| CN202586259U (en) | Minisize intelligent electric leakage comprehensive protection switch | |
| WO2008044939A1 (en) | System for fire protection of electrical installations | |
| CN217741960U (en) | Fire-fighting emergency lighting system | |
| CN110416907B (en) | Five-prevention and positioning system and method for handcart type high-voltage switch cabinet | |
| CN203734285U (en) | Zero line disconnection protective device of three-phase power grid | |
| CN109066604B (en) | Generator low-voltage protection system of million-kilowatt nuclear power station | |
| JP7176611B2 (en) | Solar power system | |
| CN210137130U (en) | Five-prevention and positioning system of handcart type high-voltage switch cabinet | |
| CN210199212U (en) | Load unit protection device in load box | |
| CN209448232U (en) | A kind of controller switching equipment and distribution system | |
| CN209896776U (en) | Monitoring and protecting system for effective operation of multiple parallel transformers | |
| CN205805978U (en) | Electromagnetic starter for coal mine blower system | |
| CN215817488U (en) | Machine room power distribution system with double circuit breaking protection | |
| CN217789290U (en) | Voltage monitoring device for frequency conversion and speed regulation electrical system of electric shovel and electric shovel | |
| CN213906301U (en) | Power supply lightning protection box for isolating switch of railway traction power supply contact network | |
| KR200348727Y1 (en) | automatic restoring machine for electric power | |
| KR102572929B1 (en) | Electrical safety connector with leakage current reduction function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |