CN220909772U - Comprehensive protection audible and visual alarm device for mine fan system - Google Patents
Comprehensive protection audible and visual alarm device for mine fan system Download PDFInfo
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- CN220909772U CN220909772U CN202321814322.0U CN202321814322U CN220909772U CN 220909772 U CN220909772 U CN 220909772U CN 202321814322 U CN202321814322 U CN 202321814322U CN 220909772 U CN220909772 U CN 220909772U
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Abstract
The utility model relates to the technical field of mine fan systems, in particular to a comprehensive protection audible and visual alarm device for a mine fan system. In order to solve the problem that the existing audible and visual alarm device of the mine fan system cannot know specific faults at the first time, the comprehensive protection audible and visual alarm device of the mine fan system is provided, and the comprehensive protection audible and visual alarm device comprises an audible alarm unit and a 24V stabilized power supply, wherein the direct-current positive and negative output ends of the 24V stabilized power supply are respectively connected with two ends of a parallel control circuit, and the parallel control circuit is formed by connecting a first insulation monitoring sub-circuit, a second insulation monitoring sub-circuit, a third insulation monitoring sub-circuit, a fourth insulation monitoring sub-circuit, a first low-voltage monitoring sub-circuit, a second low-voltage monitoring sub-circuit and a third low-voltage monitoring sub-circuit in parallel, so that the safety production of a mine is guaranteed.
Description
Technical Field
The utility model relates to the technical field of mine fan systems, in particular to a comprehensive protection audible and visual alarm device for a mine fan system.
Background
The mine fan system is used for conveying enough fresh air underground, diluting and discharging harmful and toxic gases, regulating the air quantity, humidity and temperature required underground, improving the labor condition and ensuring the safe production of a mine.
The faults of the mine fan system are mainly insulation faults and low-voltage faults. The prior audible and visual alarm device of the mine fan system comprises an insulation monitoring part and a low-voltage monitoring part, wherein the insulation monitoring part is that when the mine fan system is insulated normally, the loop opening L612 of the voltage transformer of the PT cabinet of the operation section and the standby section has less than 0.2V to the ground zero sequence voltage, the first voltage relay FV1 does not work and does not alarm, when the system insulation is reduced, the loop opening triangle L612 of the voltage transformer has the ground zero sequence voltage reaching the set value of the first voltage relay FV1, the first voltage relay FV1 acts (the zero sequence voltage action value is 20V), and the audible alarm unit sends out audible alarm; the low voltage monitoring part is that when the voltage of the mine fan system is normal, the voltage of the operation section and the standby section is normal, the second voltage relay FV2 is in a normal suction state, no alarm occurs, when the voltage of the operation section and the standby section is as low as 85 or power is lost, the second voltage relay FV2 is released, and the audible alarm unit gives out audible alarm. Although the audible and visual alarm device of the fan system can carry out fault alarm on insulation faults and low-voltage faults, the specific faults cannot be known at the first time, namely the faults cannot be effectively processed in time, and the mine safety production is seriously affected.
Disclosure of Invention
The utility model provides a comprehensive protection audible and visual alarm device for a mine fan system, which aims to solve the problem that an audible and visual alarm device for the existing mine fan system cannot learn specific faults at the first time.
The utility model is realized by adopting the following technical scheme:
The comprehensive protection audible and visual alarm device for the mine fan system comprises an audible alarm unit and a 24V stabilized power supply, wherein two alternating current input ends of the 24V stabilized power supply and two alternating current input ends of the audible alarm unit are connected between a zero line N and a live line L of the alternating current power supply, two direct current power supply input ends of the audible alarm unit are respectively connected with two ends of a normally open contact of a third relay K3 (the common knowledge of the skilled person in the art how other ports of the audible alarm unit are connected), the direct current positive and negative output ends of the 24V stabilized power supply are respectively connected with two ends of a parallel control circuit, the parallel control circuit is formed by connecting a first insulation monitoring sub-circuit, a second insulation monitoring sub-circuit, a third insulation monitoring sub-circuit, a fourth insulation monitoring sub-circuit, a first low voltage monitoring sub-circuit, a second low voltage monitoring sub-circuit and a third low voltage monitoring sub-circuit in parallel, the first insulation monitor sub-circuit is formed by serially connecting a coil of a second relay K2 with a first terminal XT1 and a second terminal XT2, the first terminal XT1 and the second terminal XT2 are correspondingly connected with a normally-closed contact of a first voltage relay FV1, the second insulation monitor sub-circuit is formed by serially connecting normally-open contacts 67 ends of a second indicator lamp HL2 and K2, the third insulation monitor sub-circuit is formed by serially connecting a normally-closed contact 56 end of a third indicator lamp HL3 and the second relay K2, the fourth insulation monitor sub-circuit is formed by serially connecting a coil of a third relay K3 with a normally-closed contact 23 terminal of the second relay K2, the first low voltage monitor sub-circuit is formed by serially connecting a coil of a fourth relay K4 with a third terminal XT3 and a fourth terminal XT4, the third terminal XT3 and the fourth terminal XT4 are correspondingly connected with the normally-open contact of the second voltage relay FV2, the second low-voltage monitoring sub-circuit is formed by connecting a fourth indicator lamp HL4 and a normally-open contact 67 end of a fourth relay K4 in series, the third low-voltage monitoring sub-circuit is formed by connecting a fifth indicator lamp HL5 and a normally-closed contact 56 end of the fourth relay K4 in series, and a normally-closed contact 23 end of a second relay K2 is connected with a normally-closed contact 23 end of the fourth relay K4 in parallel.
Working principle: 1) Insulation monitoring section: when the mine fan system is insulated and normal, the zero sequence voltage to the ground of the loop opening L612 of the potential transformer of the PT cabinet at the operation section and the standby section is less than 0.2V, the first voltage relay FV1 does not work, the corresponding terminals, namely the first terminal XT1 and the second terminal XT2, the second relay K2 is powered on, the normally open contact 67 end of the second relay K2 is closed, the normally closed contact 65 end is opened, the second indicator lamp HL2 is on, the normally closed contact 23 end of the second relay K2 is opened, the third relay K3 is powered off, the normally open contact of the third relay K3 is opened, and the audible alarm unit does not give out an alarm; when the voltage transformer loop opening triangle L612 reaches the set value of the first voltage relay FV1 to the ground zero sequence voltage when the insulation of the mine fan system is reduced, the first voltage relay FV1 acts (the zero sequence voltage action value is 20V), the normally closed contact of the first voltage relay FV1 is opened, the corresponding contacts of the first terminal XT1 and the second terminal XT2 are opened, the second relay K2 is not electrified, the normally open contact 67 end of the second relay K2 is opened, the normally closed contact 65 end is closed, the second indicator lamp HL2 is not lightened, the third indicator lamp HL3 is lightened, the normally closed contact 23 end of the second relay K2 is closed, the coil of the third relay K3 is electrified, the normally open contact of the third relay K3 is closed to switch on the audible alarm unit, and the audible alarm unit emits an alarm sound, namely, when the mine fan system is in insulation fault, the audible alarm unit emits an alarm sound, and the third indicator lamp HL3 is lightened. 2) Low voltage monitoring section: when the voltage of the mine fan system is normal, the voltages of the operation section and the standby section are normal, the second voltage relay FV2 is in a normal attraction state, the third terminal XT3 and the fourth terminal XT4 are closed, the coil of the fourth relay K4 is electrified, the normally open contact 67 end and the normally open contact 56 end of the fourth relay K4 are closed, the fourth indicator lamp HL4 is on, the fifth indicator lamp HL5 is not on, the normally closed contact 23 end of the fourth relay K4 is opened, the coil of the third relay K3 is powered off, the normally open contact of the third relay K3 is opened, and the audible alarm unit does not give out alarm; when the voltage of the operation section and the standby section is as low as 85 or loses electricity, the second voltage relay FV2 is released, the third terminal XT3 and the fourth terminal XT4 are disconnected, the coil of the fourth relay K4 is powered off, the normally open contact 67 end and the normally open contact 56 end of the fourth relay K4 are closed, the fourth indicator lamp HL4 is not on, the fifth indicator lamp HL5 is on, the normally closed contact 23 end of the fourth relay K4 is closed, the coil of the third relay K3 is powered on, the normally open contact of the third relay K3 is closed, so that the audible alarm unit is switched on, and the audible alarm unit gives an alarm, namely when the mine fan system fails at a low voltage, the audible alarm unit gives an alarm and the fifth indicator lamp HL5 is on.
Further, the coil of the time relay KT is connected in parallel with the two ends of the coil of the third relay K3, the coil of the time relay KT is connected in series with the normally closed contact 23 end of the fourth relay K4, the two ends of the two alternating current input ends of the audible alarm unit are also connected in parallel with an electric bell loop, and the electric bell loop is formed by connecting an electric bell HE and the normally open contact of the time relay KT in series. Working principle: 1) Insulation monitoring section: when the mine fan system fails in insulation, the second relay K2 is not electrified, the normally open contact 67 end of the second relay K2 is opened, the normally closed contact 65 end of the second relay K2 is closed, the second indicator lamp HL2 is not lightened, the third indicator lamp HL3 is lightened, the normally closed contact 23 end of the second relay K2 is closed, the coil of the third relay K3 and the coil of the time relay KT are electrified, the normally open contact of the third relay K3 is closed so as to be communicated with the acoustic alarm unit, the acoustic alarm unit sends out alarm sound, the normally open contact of the time relay KT is closed, the bell loop is communicated, and larger alarm sound is sent out; 2) Low voltage monitoring section: when the mine fan system fails in low voltage, the fourth relay K4 is powered off, the normally open contact 67 end of the fourth relay K4 is opened, the normally closed contact 23 end of the fourth relay K4 is closed, the fourth indicator lamp HL4 is not on, the fifth indicator lamp HL5 is on, the normally closed contact 23 end of the fourth relay K4 is closed, the coil of the time relay KT and the coil of the third relay K3 are powered on, the normally open contact of the third relay K3 is closed to be connected with the audible alarm unit, the audible alarm unit gives out alarm sounds, the normally open contact of the time relay KT is closed, the bell loop is connected, and larger alarm sounds are given out.
The beneficial effects of the utility model are as follows: the device can obtain alarm signals at the first time and can obtain specific faults through the indicator lamp at the first time, so that operators can timely carry out fault rush-repair, investment of manpower and material resources is reduced, maintenance cost of a mine fan system is saved, reliable and stable operation of the mine fan is ensured, and safety production of a mine is guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
In the figure: 1-sound alarm unit, 2-24V regulated power supply.
Detailed Description
In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the utility model.
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the comprehensive protection audible and visual alarm device for the mine fan system comprises an audible alarm unit 1 and a 24V stabilized power supply 2, wherein two alternating current input ends of the 24V stabilized power supply 2 and two alternating current input ends of the audible alarm unit 1 are connected between a zero line N and a fire wire L of the alternating current power supply, two direct current power supply input ends of the audible alarm unit 1 are respectively connected with two ends of a normally open contact of a third relay K3 (as known by a person skilled in the art, how other ports of the audible alarm unit 1 are connected with the common knowledge of the person skilled in the art), the positive and negative direct current output ends of the 24V stabilized power supply 2 are respectively connected with two ends of a parallel control circuit, the parallel control circuit is formed by connecting a first insulation monitor sub-circuit, a second insulation monitor sub-circuit, a third insulation monitor sub-circuit, a fourth insulation monitor sub-circuit, a first low voltage monitor sub-circuit, a second low voltage monitor sub-circuit and a third low voltage monitor sub-circuit in parallel, the first insulation monitor sub-circuit is formed by serially connecting a coil of a second relay K2 with a first terminal XT1 and a second terminal XT2, the first terminal XT1 and the second terminal XT2 are correspondingly connected with a normally-closed contact of a first voltage relay FV1, the second insulation monitor sub-circuit is formed by serially connecting normally-open contacts 67 ends of a second indicator lamp HL2 and K2, the third insulation monitor sub-circuit is formed by serially connecting a normally-closed contact 56 end of a third indicator lamp HL3 and the second relay K2, the fourth insulation monitor sub-circuit is formed by serially connecting a coil of a third relay K3 with a normally-closed contact 23 terminal of the second relay K2, the first low voltage monitor sub-circuit is formed by serially connecting a coil of a fourth relay K4 with a third terminal XT3 and a fourth terminal XT4, the third terminal XT3 and the fourth terminal XT4 are correspondingly connected with the normally-open contact of the second voltage relay FV2, the second low-voltage monitoring sub-circuit is formed by connecting a fourth indicator lamp HL4 and a normally-open contact 67 end of a fourth relay K4 in series, the third low-voltage monitoring sub-circuit is formed by connecting a fifth indicator lamp HL5 and a normally-closed contact 56 end of the fourth relay K4 in series, and a normally-closed contact 23 end of a second relay K2 is connected with a normally-closed contact 23 end of the fourth relay K4 in parallel.
Working principle: 1) Insulation monitoring section: when the mine fan system is insulated and normal, the zero sequence voltage to the ground of the loop opening L612 of the potential transformer of the PT cabinet at the operation section and the standby section is less than 0.2V, the first voltage relay FV1 does not work, the corresponding terminals, namely the first terminal XT1 and the second terminal XT2, the second relay K2 is powered on, the normally open contact 67 end of the second relay K2 is closed, the normally closed contact 65 end is opened, the second indicator lamp HL2 is on, the normally closed contact 23 end of the second relay K2 is opened, the third relay K3 is powered off, the normally open contact of the third relay K3 is opened, and the acoustic alarm unit 1 does not give out alarm sound; when the voltage transformer loop opening triangle L612 reaches the set value of the first voltage relay FV1 to the ground zero sequence voltage when the insulation of the mine fan system is reduced, the first voltage relay FV1 acts (the zero sequence voltage action value is 20V), the normally closed contact of the first voltage relay FV1 is opened, the contacts corresponding to the first terminal XT1 and the second terminal XT2 are opened, the second relay K2 is not electrified, the normally open contact 67 end of the second relay K2 is opened, the normally closed contact 65 end is closed, the second indicator lamp HL2 is not lightened, the third indicator lamp HL3 is lightened, the normally closed contact 23 end of the second relay K2 is closed, the coil of the third relay K3 is electrified, the normally open contact of the third relay K3 is closed to switch on the audible alarm unit 1, the audible alarm unit 1 gives out an alarm, namely, when the mine fan system is in insulation fault, the audible alarm unit 1 gives out an alarm, and the third indicator lamp HL3 is lightened. 2) Low voltage monitoring section: when the voltage of the mine fan system is normal, the voltages of the operation section and the standby section are normal, the second voltage relay FV2 is in a normal attraction state, the third terminal XT3 and the fourth terminal XT4 are closed, the coil of the fourth relay K4 is electrified, the normally open contact 67 end and the normally open contact 56 end of the fourth relay K4 are closed, the fourth indicator lamp HL4 is on, the fifth indicator lamp HL5 is not on, the normally closed contact 23 end of the fourth relay K4 is off, the coil of the third relay K3 is powered off, the normally open contact of the third relay K3 is opened, and the acoustic alarm unit 1 does not give out alarm sound; when the voltage of the operation section and the standby section is as low as 85 or loses electricity, the second voltage relay FV2 is released, the third terminal XT3 and the fourth terminal XT4 are disconnected, the coil of the fourth relay K4 is in power failure, the normally open contact 67 end and the normally open contact 56 end of the fourth relay K4 are closed, the fourth indicator lamp HL4 is not on, the fifth indicator lamp HL5 is on, the normally closed contact 23 end of the fourth relay K4 is closed, the coil of the third relay K3 is powered on, the normally open contact of the third relay K3 is closed, so that the acoustic alarm unit 1 is switched on, and the acoustic alarm unit 1 emits alarm sound when the mine fan system fails at low voltage, namely, the acoustic alarm unit 1 emits alarm sound and the fifth indicator lamp HL5 is on.
In specific implementation, the coil of the time relay KT is connected in parallel with the two ends of the coil of the third relay K3, the coil of the time relay KT is connected in series with the normally closed contact 23 end of the fourth relay K4, the two ends of the two alternating current input ends of the acoustic alarm unit 1 are also connected in parallel with an electric bell loop, and the electric bell loop is formed by connecting an electric bell HE with the normally open contact of the time relay KT in series. Working principle: 1) Insulation monitoring section: when the mine fan system fails in insulation, the second relay K2 is not electrified, the normally open contact 67 end of the second relay K2 is opened, the normally closed contact 65 end of the second relay K2 is closed, the second indicator lamp HL2 is not on, the third indicator lamp HL3 is on, the normally closed contact 23 end of the second relay K2 is closed, the coil of the third relay K3 and the coil of the time relay KT are electrified, the normally open contact of the third relay K3 is closed so as to be communicated with the acoustic alarm unit 1, the acoustic alarm unit 1 emits alarm sound, the normally open contact of the time relay KT is closed, the bell circuit is communicated, and larger alarm sound is emitted; 2) Low voltage monitoring section: when the mine fan system fails in low voltage, the fourth relay K4 is powered off, the normally open contact 67 end of the fourth relay K4 is opened, the normally closed contact 23 end of the fourth relay K4 is closed, the fourth indicator lamp HL4 is not on, the fifth indicator lamp HL5 is on, the normally closed contact 23 end of the fourth relay K4 is closed, the coil of the time relay KT and the coil of the third relay K3 are powered on, the normally open contact of the third relay K3 is closed to be connected with the acoustic alarm unit 1, the acoustic alarm unit 1 gives out alarm sounds, the normally open contact of the time relay KT is closed, the bell loop is connected, and larger alarm sounds are given out.
When the method is specifically implemented, the parallel control circuit further comprises a silencing circuit, the silencing circuit is formed by connecting a coil of the first relay K1 and the third transfer switch SA3 in series, and a normally closed contact of the first relay K1 is connected in series between one alternating current input end of the audible alarm unit 1 and a zero line N of an alternating current power supply. When the alarm device works, when the alarm sound is needed to be eliminated manually, the third transfer switch SA3 is twisted, the coil of the first relay K1 is powered on, the normally closed contact of the first relay K1 is disconnected, the power supply is disconnected by the audible alarm unit 1, and the alarm sound is eliminated.
In this embodiment, the first insulation monitor sub-circuit is further connected in series with a first button SB1, and the first low voltage monitor sub-circuit is further connected in series with a second button SB2. When the alarm function of the insulation monitoring part is required to be tested artificially, the first button SB1 is pressed, the second relay K2 is powered off, and the alarm function of insulation monitoring is realized (the specific principle is the same as the working principle of the insulation monitoring part); when the alarm function of the low-voltage monitoring part is required to be manually tested, the second button SB2 is pressed, and the fourth relay K4 is powered off, so that the alarm function of the low-voltage monitoring part is realized.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.
Claims (5)
1. The comprehensive protection audible and visual alarm device for the mine fan system is characterized by comprising an audible alarm unit (1) and a 24V stabilized power supply (2), wherein two alternating current input ends of the 24V stabilized power supply (2) and two alternating current input ends of the audible alarm unit (1) are connected between a zero line N and a fire wire L of the alternating current power supply, two direct current power supply input ends of the audible alarm unit (1) are respectively connected with two ends of a normally open contact of a third relay K3, direct current positive and negative output ends of the 24V stabilized power supply (2) are respectively connected with two ends of a parallel control circuit, the parallel control circuit is formed by connecting a first insulation monitoring sub-circuit, a second insulation monitoring sub-circuit, a third insulation monitoring sub-circuit, a fourth insulation monitoring sub-circuit, a first low voltage monitoring sub-circuit, a second low voltage monitoring sub-circuit and a third low voltage monitoring sub-circuit in parallel, the first insulation monitor sub-circuit is formed by serially connecting a coil of a second relay K2 with a first terminal XT1 and a second terminal XT2, the first terminal XT1 and the second terminal XT2 are correspondingly connected with a normally closed contact of a first voltage relay FV1, the second insulation monitor sub-circuit is formed by serially connecting a second indicator lamp HL2 and a normally open contact 67 end of the second relay K2, the third insulation monitor sub-circuit is formed by serially connecting a third indicator lamp HL3 and a normally closed contact 56 end of the second relay K2, the fourth insulation monitor sub-circuit is formed by serially connecting a coil of a third relay K3 and a normally closed contact 23 terminal of the second relay K2, the first low voltage monitor sub-circuit is formed by serially connecting a coil of a fourth relay K4 with a third terminal XT3 and a fourth terminal XT4, the third terminal XT3 and the fourth terminal XT4 are correspondingly connected with a normally open contact of a second voltage relay FV2, the second low-voltage monitoring sub-circuit is formed by connecting a fourth indicator lamp HL4 and a normally-open contact 67 end of a fourth relay K4 in series, the third low-voltage monitoring sub-circuit is formed by connecting a fifth indicator lamp HL5 and a normally-closed contact 56 end of the fourth relay K4 in series, and a normally-closed contact 23 end of a second relay K2 is connected with a normally-closed contact 23 end of the fourth relay K4 in parallel.
2. The comprehensive protection audible and visual alarm device for the mine fan system according to claim 1, wherein the coil of the third relay K3 is connected with the coil of the time relay KT in parallel at two ends, the coil of the time relay KT is connected with the normally closed contact 23 end of the fourth relay K4 in series, the two ends of the two alternating current input ends of the audible alarm unit (1) are also connected with an electric bell loop in parallel, and the electric bell loop is formed by connecting an electric bell HE and the normally open contact of the time relay KT in series.
3. The comprehensive protection audible and visual alarm device of the mine fan system according to claim 1 or 2, wherein the parallel control circuit further comprises a silencing circuit, the silencing circuit is formed by connecting a coil of the first relay K1 and the third transfer switch SA3 in series, and a normally closed contact of the first relay K1 is connected in series between one alternating current input end of the audible alarm unit (1) and a zero line N of an alternating current power supply.
4. A comprehensive protection audible and visual alarm for a mine fan system according to claim 3, wherein a first button SB1 is also connected in series in the first insulated monitoring sub-circuit.
5. The integrated protection audible and visual alarm device for a mine fan system of claim 4, wherein a second button SB2 is also connected in series in the first low voltage monitoring sub-circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321814322.0U CN220909772U (en) | 2023-07-11 | 2023-07-11 | Comprehensive protection audible and visual alarm device for mine fan system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321814322.0U CN220909772U (en) | 2023-07-11 | 2023-07-11 | Comprehensive protection audible and visual alarm device for mine fan system |
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| Publication Number | Publication Date |
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| CN220909772U true CN220909772U (en) | 2024-05-07 |
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| CN202321814322.0U Active CN220909772U (en) | 2023-07-11 | 2023-07-11 | Comprehensive protection audible and visual alarm device for mine fan system |
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| Country | Link |
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| CN (1) | CN220909772U (en) |
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- 2023-07-11 CN CN202321814322.0U patent/CN220909772U/en active Active
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