CN108235528B - Intelligent fire emergency lighting main power supply line three-wire-to-two-wire converter - Google Patents
Intelligent fire emergency lighting main power supply line three-wire-to-two-wire converter Download PDFInfo
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- CN108235528B CN108235528B CN201810189652.2A CN201810189652A CN108235528B CN 108235528 B CN108235528 B CN 108235528B CN 201810189652 A CN201810189652 A CN 201810189652A CN 108235528 B CN108235528 B CN 108235528B
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- 238000005286 illumination Methods 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 34
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- 238000004891 communication Methods 0.000 claims description 3
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- 238000006243 chemical reaction Methods 0.000 description 9
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- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
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- 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
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Abstract
The invention discloses a three-wire to two-wire converter of a main power supply line of intelligent fire emergency lighting, which comprises an identification circuit A, an identification circuit B and a circuit C; the live wire L is respectively connected with the switch K1 and the identification circuit A, the switch K1 is respectively connected with the normally open contact K2 and the identification circuit B, and the normally open contact K2 is connected with the circuit C and one end of the emergency lamp; the identification circuit A and the identification circuit B are respectively connected with the circuit C; the zero line N is respectively connected with the fuse F1 and the other end of the emergency lamp, the fuse F1 is respectively connected with the identification circuit A, the identification circuit B and the circuit C, and the anode of the light-emitting diode VD5 is connected with the resistor R3 in series and then connected with the fuse F1 in parallel. The invention converts the three-wire power supply into the two-wire power supply through the converter, so that the emergency lamp realizes the two-wire power supply, is convenient to overhaul and maintain, saves used materials, ensures that the emergency lamp access line is simpler and more convenient, simultaneously ensures that the main power supply line of the building emergency illumination tends to be simple and reliable, and is convenient for centralized management and control of the emergency illumination.
Description
Technical Field
The invention belongs to the technical field of emergency lighting, and relates to a three-wire to two-wire converter of a main power supply line of intelligent fire emergency lighting.
Background
The main functional basic requirements of the emergency lighting main power supply line in the relevant standards of the fire emergency lighting and evacuation indication system GB17945-2010 national standard 50116-2013 fire automatic alarm system design specification are as follows: the emergency lamp is safely provided with the power for illuminating at ordinary times and charging the battery in the lamp, and the time for fully charging the battery in the lamp cannot be longer than 24 hours; a switch is not required to be arranged on the emergency power supply line; the switch for providing the lighting of the lamp at ordinary times can not influence the emergency function of the lamp, and the two-wire and three-wire access mode of the main power supply can be used. The two-wire type lamp is mainly used for not using a lamp for illumination at ordinary times, such as a double-head emergency lamp; or a lamp which is always used for lighting at ordinary times and is not used for controlling on/off, such as a sign indicator lamp; the three-wire type emergency lamp is mainly used for controlling illumination at ordinary times and is often installed in offices, monitoring rooms, financial offices, fire centers, air-defense basements and other places. However, because emergency lamps with normal illumination are often distributed in various occasions of a building, for simplicity, convenience and material saving, in actual application, three wires are still used as main wires or all three wires, and even five wires are used for laying main power supply lines. As shown in fig. 1 and 2.
The three wires or the three wires and the two wires are adopted for laying, so that the emergency power supply circuit is complex to overhaul and maintain during design and construction, remote control and centralized control of emergency illumination are inconvenient, and the emergency lamp is inconvenient to supplement and access.
Disclosure of Invention
The invention aims to provide a three-wire to two-wire converter for a main power supply line of a fire emergency lighting, which solves the problems of difficult overhaul and maintenance, material waste and complicated power supply line of the existing emergency lamp power supply connection line.
The aim of the invention can be achieved by the following technical scheme:
An intelligent fire emergency lighting main power supply line three-wire to two-wire converter comprises an identification circuit A, an identification circuit B and a circuit C;
The live wire L is respectively connected with one end of the switch K1, one end of the piezoresistor R4 and the identification circuit A, the other end of the switch K1 is respectively connected with one end of the normally open contact K2 and the identification circuit B, and the other end of the normally open contact K2 is connected with the circuit C and the emergency lamp; the identification circuit A and the identification circuit B are respectively connected with the circuit C; the zero line N is respectively connected with one end of the fuse F1, the other end of the piezoresistor R4 and the emergency lamp, the other end of the fuse F1 is respectively connected with the identification circuit A, the identification circuit B and the circuit C, and the anode of the light-emitting diode VD5 is connected with the resistor R3 in series and then connected with the fuse F1 in parallel.
Further, the identification circuit A comprises a capacitor C1, a resistor R1, a diode VD2, a relay T1 coil and an electrolytic capacitor C3, the identification circuit B comprises a capacitor C2, a resistor R2, a diode VD3, a diode VD4, a relay T2 coil and an electrolytic capacitor C4, the connection lines of the identification circuit A and the identification circuit B are the same, wherein the capacitor C1 in the identification circuit A is respectively connected with an anode of the diode VD1 and a cathode of the diode VD2, the resistor R1 is connected with the capacitor C1 in parallel, the cathode of the diode VD1 is respectively connected with one end of the relay T1 coil and one end of the electrolytic capacitor C3, and the anode of the diode VD2, the other end of the relay T1 coil and the other end of the electrolytic capacitor C3 are respectively connected with the fuse F1;
The circuit C comprises a normally-closed contact K4 of the relay T1, a normally-closed contact K3 of the relay T2 and an inductor L, wherein two ends of the normally-closed contact K4 of the relay T1 are respectively connected with the normally-closed contact K3 of the relay T2 and the inductor L.
Further, when electricity is supplied, the coil of the relay T1 works, the normally closed contact K4 corresponding to the relay T1 is opened, when the switch K1 in the circuit is closed, the coil of the relay T2 works, the normally open contact K2 corresponding to the relay T2 is closed, the normally closed contact K3 corresponding to the relay T2 is opened, the live wire of the mains 220V power supply is connected to a through the switch K1 and the normally closed contact K2, the zero line is connected to b, so that the emergency lamp connected to the ab is lighted at ordinary times, in addition, the normally closed contact K3 and the normally closed contact K4 are disconnected, and the power short circuit phenomenon cannot occur at the ab.
Further, when electricity exists, the disconnection switch K1, 220V power supply and the emergency lamp are disconnected, the emergency lamp is extinguished in normal time, the identification circuit B is powered off, the coil of the relay T2 is powered off, the normally open contact K2 corresponding to the relay T2 is disconnected, the normally closed contact K3 corresponding to the relay T2 is closed, the coil of the relay T1 works, the normally closed contact K4 corresponding to the relay T1 is disconnected, the emergency lamp is extinguished, and the communication short circuit phenomenon at the position ab can not occur.
Further, when the mains supply fails, no matter the switch K1 is in an open or closed state, the coil of the relay T1 and the coil of the relay T2 are powered off, the normally open contact K2 of the relay T2 is disconnected, 220v mains voltage does not exist between the two ends a and b of the emergency lamp, at the moment, the end point a of the emergency lamp passes through the normally closed contact K3 of the relay T2, the normally closed contact K4 of the relay T1, the inductor L and the ends b of the fuse F1, and emergency lighting conversion immediately occurs to the emergency lamp.
The invention has the beneficial effects that:
The three-wire to two-wire converter of the main power supply circuit of the fire emergency lighting provided by the invention converts three-wire power supply into two-wire power supply through the converter, so that the emergency lamp with the lighting function at ordinary times can realize two-wire power supply, is convenient to overhaul and maintain, greatly saves used materials, is simpler and more convenient to access the emergency lamp into the circuit, is simplified, has the characteristics of high reliability and high safety, and is convenient for remote and centralized control of the emergency lighting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a wiring diagram of a three-wire mains supply for a typical five-wire construction but with easier access to the lamp;
FIG. 2 is a wiring diagram of FIG. 1 modified to a three-wire layout but with more complex and error-prone actual construction and access to the lamps;
FIG. 3 is a wiring diagram of a two-wire main power supply with the addition of an intelligent converter;
FIG. 4 is a schematic circuit diagram of a converter according to the present invention;
FIG. 5 is a diagram of the internal circuit of the converter according to the present invention;
Fig. 6 is a schematic diagram of the circuit connection of the emergency lamp according to the present invention using external triggering.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 3-5, the invention discloses a three-wire to two-wire converter for a main power supply line of intelligent fire emergency lighting, wherein a conversion circuit comprises an identification circuit A, an identification circuit B and a circuit C;
The live wire L is respectively connected with one end of the switch K1, one end of the piezoresistor R4 and the identification circuit A, the other end of the switch K1 is respectively connected with one end of the normally open contact K2 and the identification circuit B, and the other end of the normally open contact K2 is connected with the circuit C and the emergency lamp; the identification circuit A and the identification circuit B are respectively connected with the circuit C; the zero line N is respectively connected with one end of the fuse F1, the other end of the piezoresistor R4 and the emergency lamp, the other end of the fuse F1 is respectively connected with the identification circuit A, the identification circuit B and the circuit C, and the anode of the light-emitting diode VD5 is connected with the resistor R3 in series and then connected with the fuse F1 in parallel.
The identification circuit A comprises a capacitor C1, a resistor R1, a diode VD2, a relay T1 coil and an electrolytic capacitor C3, the identification circuit B comprises a capacitor C2, a resistor R2, a diode VD3, a diode VD4, a relay T2 coil and an electrolytic capacitor C4, the connection lines of the identification circuit A and the identification circuit B are the same, the capacitor C1 in the identification circuit A is respectively connected with an anode of the diode VD1 and a cathode of the diode VD2, the resistor R1 is connected with the capacitor C1 in parallel, the cathode of the diode VD1 is respectively connected with one end of the coil of the relay T1 and one end of the electrolytic capacitor C3, and the anode of the diode VD2, the other end of the coil of the relay T1 and the other end of the electrolytic capacitor C3 are respectively connected with the fuse F1.
The circuit C comprises a normally closed contact K4 of the relay T1, a normally closed contact K3 of the relay T2 and an inductor L, wherein two ends of the normally closed contact K4 of the relay T1 are respectively connected with the normally closed contact K3 of the relay T2 and the inductor L, and a loop is formed among the normally closed contact K4 of the relay T1, the normally closed contact K3 of the relay T2, the inductor L, the fuse F1 and the emergency lamp.
The two-wire control process of the emergency lamp comprises three states, namely, when the emergency lamp is powered on and is in a lighting state, the emergency lamp is in a 1-wire control state; 2. when electricity is supplied, the emergency lamp is in an extinguishing state, and emergency illumination triggering conversion is not caused; 3. when power failure occurs, the emergency lamp starts an emergency conversion state.
When electricity is supplied, the coil of the relay T1 works, the normally closed contact K4 corresponding to the relay T1 is opened, when the switch K1 in the circuit is closed, the coil of the relay T2 works, the normally open contact K2 corresponding to the relay T2 is closed, the normally closed contact K3 corresponding to the relay T2 is opened, the fire wire of the mains 220V power supply is connected to a through the switch K1 and the normally closed contact K2, the zero line is connected to b, so that the emergency lamp connected to the ab is lighted at ordinary times, in addition, the normally closed contact K3 and the normally closed contact K4 are disconnected, the power short circuit phenomenon does not occur, and the process is in a state 1;
When electricity is supplied, the switch K1 is disconnected, the 220V power supply is communicated with the emergency lamp, the emergency lamp is extinguished in normal time, the identification circuit B is in power failure, the coil of the relay T2 is in power failure, the normally open contact K2 corresponding to the relay T2 is disconnected, the normally closed contact K3 corresponding to the relay T2 is closed, the coil of the relay T1 works, the normally closed contact K4 corresponding to the relay T1 is disconnected, and the emergency lamp is extinguished, so that the process is in a state 2;
When the mains supply is in a power failure, no matter the switch K1 is in an open or closed state, the relay T1 and the relay T2 are powered off, the normally open contact K2 of the relay T2 is disconnected, 220V mains supply voltage does not exist between the two end points a and b of the emergency lamp, at the moment, the end point a of the emergency lamp passes through the normally closed contact K3 of the relay T2, the normally closed contact K4 of the relay T1, the inductor L, the fuse F1 and the end point b to form a passage, emergency lighting conversion immediately occurs to the emergency lamp, the process is state 3, the inductor L is in a high-resistance state in 220V mains supply, and the inductor L is in a low-resistance state in a direct current loop when the power failure occurs.
The emergency lamp is an independent power supply type lamp, the emergency lamp is triggered by a power failure signal to be turned into an emergency lighting starting mode, the emergency lamp is respectively internally triggered and externally triggered, the internally triggered emergency lamp is irrelevant to a circuit, and the internally triggered emergency lamp with normal illumination can be controlled in an internal triggering mode or an external triggering mode.
The external triggering mode is started, and in fact, a direct current path can be automatically provided in the emergency lamp when power is cut off, so that a direct current power supply in the emergency lamp completes a triggering loop through the lighting switch. The intelligent identification circuit designed by the invention ensures that no matter what state the illumination switch is in, a conduction loop can be completed through the normally-closed contact K3, the normally-closed contact K4 and the inductor L of the relay in the converter during power failure, so that the lamp is ensured to be smoothly triggered and converted into emergency illumination.
As shown in FIG. 6, the emergency lamp of the invention adopts an external trigger type, wherein the external trigger is a mode of completing emergency lighting conversion by automatically switching on a direct current trigger circuit of the lamp through a power supply line when the emergency lamp fails. The trigger conversion circuit of the external trigger type emergency lamp comprises a switch power supply charging circuit, a power supply E, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a diode VD6, a diode VD7, a diode VD8, a voltage stabilizing diode VD9, a diode VD10, a capacitor C6, a capacitor C7, a triode Q1, a triode Q2, a triode Q3 and an inverter circuit;
The terminal a and the terminal b of the emergency lamp are respectively connected with a switch power supply charging circuit, wherein the terminal a of the emergency lamp is connected with one end of a resistor R11, the other end of the resistor R11 is respectively connected with the anode of a diode VD10 and one end of a resistor R10, the cathode of the diode VD10 and the other end of the resistor R10 are respectively connected with the cathode of a voltage-stabilizing diode VD9, the cathode of a diode VD8 and one end of a capacitor C7, the anode of the diode VD8 is connected with the base electrode of a triode Q3, the collector electrode of the triode Q3 is respectively connected with one end of the resistor R7, one end of the resistor R9 and the base electrode of a triode Q2 through a resistor R6, the collector electrode of the triode Q2 is connected with the base electrode of a triode Q1 through a resistor R8, and the other end of the resistor R7 is respectively connected with the collector electrode of the triode Q1 and an inverter circuit; an end point of the emergency lamp b is connected with one end of a capacitor C6 through a resistor R12, an output end of the switching power supply charging circuit is connected with a resistor R5 through a diode VD6, a node of the diode VD6 and the resistor R5 is connected with the other end of the capacitor C6, the resistor R5 is respectively connected with an emitter of a triode Q1, an emitter of a triode Q3 and a fuse F2 through a diode VD7, and the fuse F2 is connected with an anode of a power supply E; the other output end of the switching power supply charging circuit is respectively connected with a capacitor C6, a cathode of a power supply E, an anode of a voltage stabilizing diode VD9, the other end of the capacitor C7, the other end of a resistor R9, an emitter of a triode Q2 and an inverter circuit.
When electricity is supplied, 220V mains supply is supplied, 220 alternating current is converted into low-voltage alternating current through a switching power supply charging circuit, and then a battery E is charged through a diode VD6, a resistor R5, a diode VD7 and a fuse F2;
Another path of 220V mains supply: the live wire L is connected with the capacitor C7 and the voltage stabilizing diode VD9 through the resistor R11 and the diode VD10 in a forward rectifying and voltage reducing way, is reduced in a voltage reducing way through the resistor R12, reaches the zero line N, completes an alternating current forward loop, and is powered by the capacitor C7, so that the forward voltage of the capacitor C7 is higher than the base electrode of the triode Q3, the triode Q3 is cut off without output, and the triode Q2 and the triode Q1 are also cut off.
When the mains supply fails, the battery E sequentially passes through the fuse F2, the triode Q3, the diode VD8, the resistor R10, the resistor R11, the external circuit equivalent resistor Re (the equivalent resistor Re is replaced by the connection of approximate short circuit formed by the normally closed contact K3, the normally closed contact K4, the inductor L and the resistor R3 of the converter) and the resistor R12 to form a triode Q3 forward bias loop, so that the triode Q3 is conducted, the triode Q2 is conducted due to the conduction of the triode Q3, the triode Q1 is also conducted, the inverter circuit is started to perform oscillation starting and amplification, the low-voltage battery direct current in the lamp body is inverted into high-frequency high-voltage alternating current, and the emergency lamp light source is ignited, so that the emergency lighting conversion is realized; after the triode Q1 is conducted, self-locking of the triode Q2 is realized through the resistor R7, and the triode Q is continuously conducted, so that the emergency lighting working state is maintained;
obviously, if one node of the normally closed contact K3 of the relay T2 in the converter, the normally closed contact K4 of the relay T1, the inductor L and the fuse F1 cannot be communicated during power failure, the base electrode of the triode Q1 of the lamp triggering circuit cannot complete a passage, the emergency lamp cannot be converted into emergency illumination, and if the normally closed contact K3, the normally closed contact K4, the inductor L and the fuse F1 are already connected during power failure, the conversion of the emergency illumination cannot be affected when the lamp illumination switch K1 is in any state.
The circuit design is simple but has a high safety factor. The circuit can not generate the high-voltage short circuit blasting phenomenon of the power supply because of the fault of the converter all the time, because the internal communication of the circuit adopts a mode similar to an AND gate to control the power supply to be connected, adopts a mode of an OR gate to control the disconnection of the circuit, and further, the normally open contact K2 and the normally closed contact K3 are interlocked with a group of opposite contacts of the coil of the relay T2. When the internal elements of the converter are damaged longitudinally, a short circuit in a small current state is formed, the fuse F1 is protected, the fault indicator lamp VD5 reminds, and the safety performance of the circuit is guaranteed in a plurality of links.
Through this intelligent converter and internal trigger converting circuit combined action of lamp, will originally need three-wire power supply just can control the emergency light of illumination at ordinary times to two-wire power supply, no matter what kind of on-off state is in to switch K1, various functions are not influenced, from this makes all emergency lights (do not take control the emergency light of illumination at ordinary times like sign pilot lamp and accident lighting lamp also need not to install the converter additional) can all realize complete simple two-wire power supply in the building.
The three-wire to two-wire converter of the intelligent fire emergency lighting main power supply circuit converts three-wire power supply into two-wire power supply through the converter, so that the emergency lamp with the lighting function at ordinary times can realize two-wire power supply, is convenient to overhaul and maintain, greatly saves used materials, is simpler and more convenient to access the emergency lamp into the circuit, is simplified, has the characteristics of high reliability and high safety, and is convenient for remote and centralized control of emergency lighting.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (3)
1. An intelligent fire emergency lighting main power supply line three-wire to two-wire converter is characterized in that: the circuit comprises an identification circuit A, an identification circuit B and a circuit C;
The live wire L is respectively connected with one end of the switch K1, one end of the piezoresistor R4 and the identification circuit A, the other end of the switch K1 is respectively connected with one end of the normally open contact K2 and the identification circuit B, and the other end of the normally open contact K2 is connected with the circuit C and the emergency lamp; the identification circuit A and the identification circuit B are respectively connected with the circuit C; the zero line N is respectively connected with one end of the fuse F1, the other end of the piezoresistor R4 and the emergency lamp, the other end of the fuse F1 is respectively connected with the identification circuit A, the identification circuit B and the circuit C, and the anode of the light-emitting diode VD5 is connected with the resistor R3 in series and then connected with the fuse F1 in parallel;
The identification circuit A comprises a capacitor C1, a resistor R1, a diode VD2, a relay T1 coil and an electrolytic capacitor C3, the identification circuit B comprises a capacitor C2, a resistor R2, a diode VD3, a diode VD4, a relay T2 coil and an electrolytic capacitor C4, the connection lines of the identification circuit A and the identification circuit B are the same, wherein the capacitor C1 in the identification circuit A is respectively connected with an anode of the diode VD1 and a cathode of the diode VD2, the resistor R1 is connected with the capacitor C1 in parallel, the cathode of the diode VD1 is respectively connected with one end of the relay T1 coil and one end of the electrolytic capacitor C3, and the anode of the diode VD2, the other end of the relay T1 coil and the other end of the electrolytic capacitor C3 are respectively connected with the fuse F1;
the circuit C comprises a normally closed contact K4 of the relay T1, a normally closed contact K3 of the relay T2 and an inductor L, wherein two ends of the normally closed contact K4 of the relay T1 are respectively connected with the normally closed contact K3 of the relay T2 and the inductor L, and a loop is formed among the normally closed contact K4 of the relay T1, the normally closed contact K3 of the relay T2, the inductor L, the fuse F1 and the emergency lamp;
When electricity is supplied, the coil of the relay T1 works, the normally closed contact K4 corresponding to the relay T1 is opened, when the switch K1 in the circuit is closed, the coil of the relay T2 works, the normally open contact K2 corresponding to the relay T2 is closed, the normally closed contact K3 corresponding to the relay T2 is opened, the fire wire of the mains 220V power supply is connected to a through the switch K1 and the normally closed contact K2, the zero line is connected to b, so that the emergency lamp connected to the a b is lighted at ordinary times, in addition, the normally closed contact K3 and the normally closed contact K4 are opened, and the power short circuit phenomenon cannot occur at the a b.
2. The intelligent fire emergency lighting main power line three-to-two-line converter of claim 1, wherein: when electricity exists, the disconnection switch K1, 220V power supply and the emergency lamp are disconnected, the emergency lamp is extinguished in normal time, the identification circuit B is powered off, the relay T2 coil is powered off, the normally open contact K2 corresponding to the relay T2 is disconnected, the normally closed contact K3 corresponding to the relay T2 is closed, the relay T1 coil works, the normally closed contact K4 corresponding to the relay T1 is disconnected, the emergency lamp is extinguished, and the phenomenon of short-circuit communication cannot occur at a B.
3. The intelligent fire emergency lighting main power line three-to-two-line converter of claim 1, wherein: when the mains supply is in a power failure, no matter the switch K1 is in an open or closed state, the coil of the relay T1 and the coil of the relay T2 are powered off, the normally open contact K2 of the relay T2 is disconnected, 220v mains voltage does not exist between the two ends a and b of the connection emergency lamp, at the moment, the end point of the emergency lamp a forms a passage through the normally closed contact K3 of the relay T2, the normally closed contact K4 of the relay T1, the inductor L, the fuse F1 and the end point b, and the emergency lamp is started to be converted into emergency illumination.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189652.2A CN108235528B (en) | 2018-03-08 | 2018-03-08 | Intelligent fire emergency lighting main power supply line three-wire-to-two-wire converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810189652.2A CN108235528B (en) | 2018-03-08 | 2018-03-08 | Intelligent fire emergency lighting main power supply line three-wire-to-two-wire converter |
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| CN108235528A CN108235528A (en) | 2018-06-29 |
| CN108235528B true CN108235528B (en) | 2024-04-19 |
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| US7609007B1 (en) * | 2008-02-26 | 2009-10-27 | Creston Electronics, Inc. | Dimmer adaptable to either two or three active wires |
| CN105027376A (en) * | 2013-03-15 | 2015-11-04 | 电力集成公司 | Rectifier with indicator switch |
| CN208029161U (en) * | 2018-03-08 | 2018-10-30 | 合肥东泰工贸有限公司 | A kind of two line converters of three line of intelligent fire emergency lighting mains supply line change |
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| CN108235528A (en) | 2018-06-29 |
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