What information is needed for the installation of outdoor high-voltage pipelines in construction projects?

Information required for the installation of outdoor high-voltage pipelines in construction projects:

1. Requirements for construction personnel

Safety prevention projects are to safeguard social public safety* **Intrusion alarm, TV surveillance, entrance and exit control, explosion prevention and discharge and safety inspection projects for the purpose of security and protecting the lives and property of the country and people. Project construction units are mostly key units or departments such as party and government agencies, national key cultural relics systems, and important financial systems. To this end, security project construction personnel are required to not only have a high technical level, but also have good political quality to avoid loopholes caused by the construction process.

Security project construction personnel should meet the following conditions:

1. Comply with state laws and have no criminal history.

2． Strictly adhere to the project confidentiality system.

3． Accept the management of the construction authorities and abide by various rules and regulations.

4. Team leaders and main construction personnel must hold electrician qualification certificates, or have corresponding professional knowledge and skills, and have more than three years of construction experience.

2. Construction requirements for intrusion report and transcript projects

1. General requirements

(1) There must be an on-site engineer at the construction site of the intrusion alarm project to guide the construction and cooperate with the construction unit to detect and accept the hidden projects during the construction.

(2) The following drawings and materials should be available before the construction of the intrusion alarm project:

① Detector deployment plan, central equipment layout diagram, system principle and system connection diagram.

②Pipeline requirements and pipeline laying diagram.

③Equipment, equipment installation requirements and installation drawings.

(3) The construction of the intrusion alarm system shall be carried out according to the drawings and shall not be changed at will. When it is really necessary to change the original design drawings, they should be approved according to the procedures. The approval documents (notices, etc.) must be signed by the authorized persons of both parties before they can be implemented.

(4) When the intrusion alarm system is completed, the construction unit shall submit the following drawings and materials:

① All drawings and materials before construction.

②As-built drawing of the project.

③Design change files.

④Detection records. Including insulation resistance, ground resistance and other test data.

⑤Acceptance records of concealed projects.

2． Wiring

(1) The wiring of the alarm system should comply with the requirements of the current national standard "Electrical Installation Engineering Construction: Construction and Acceptance Specifications" (Note: This is the name of the relevant standard compilation and will be used hereafter).

(2) In principle, the various wires of the alarm system should be shortened as much as possible.

(3) Threading wires in pipes or troughs should be carried out after the completion of building plastering and ground work. Before threading, the water and debris in the pipe or trunking should be cleared away. It is advisable to apply butter or talcum powder when threading. The wires entering the pipe should be straight and free of joints and kinks.

(4) The wire joints should be welded in the junction box or connected with terminals.

(5) Wires from different systems, different voltage levels, and different current categories should not be worn in the same tube or the same trunking.

(6) The direction and installation location of exposed pipelines should be coordinated with the interior decoration layout.

(7) A junction box should be installed at the intersection of vertical wiring and horizontal wiring to ensure firm wiring and a clean appearance.

(8) When the wire is under the floor, in the ceiling or through the wall, the wire should be inserted into the pipe.

(9) In dusty or humid places, pipeline interfaces should be sealed.

(10) Generally, the total area of ??wires in the pipe (including the insulation layer) should not exceed 2/3 of the internal cross-section of the pipe.

(11) The distance between two fixed points of the pipeline cannot exceed 1.514. Fixed points should be set at the following locations:

①Pipeline joints.

②0.2m away from the junction box.

③At the corner of the pipeline.

(12) Different wires in the same system should be marked or numbered with different colors. For example, the positive end of the power cord is red, the ground end is black, the remote signal line is yellow, the address signal line is white, etc. There are many address signal lines in the alarm system. The address signal lines on each floor or in each defense zone can be marked with the same color and then numbered one by one.

(13) Use a 500V megger to measure the insulation resistance of the wires in each circuit. The insulation resistance value to ground should not be less than 20M0.

3． Installation of intrusion detectors

(1) Before installation, the intrusion detector (hereinafter referred to as the detector) must be powered on to check its working condition and recorded.

(2) The installation of detectors should comply with the requirements of the "Code for Installation, Construction and Acceptance of Electrical Devices".

(3) The installation of the detector should be carried out in accordance with the design requirements and design drawings.

(4) The installation of indoor passive infrared detectors should meet the following requirements:

① Wall-mounted passive infrared detectors should be installed at an angle of 900 degrees from the direction of possible intrusion. The height is about 2.2m, and the inclination angle between the detector and the wall is determined according to the specific prevention conditions.

③ Ceiling-mounted passive infrared detectors are generally installed on the ceiling near key prevention areas and must be installed horizontally.

③ Corridor-type passive infrared detectors must be installed at the end of the corridor, with a field of view along the corridor and a height of about 2.2m.

④ Passive infrared detectors must be installed firmly and are not allowed to be installed directly above radiators, electric heaters, stoves and other heat sources; they are not allowed to face air conditioners, ventilation fans and other objects; they are not allowed to face precautions Movement and possible moving objects within the zone. Prevent light from shining directly on the detector, and there are no obstructions directly in front of the detector.

(5) The installation of active infrared detectors should meet the following requirements:

① The installation should be firm and the transmitter and receiver should be aligned to achieve the best detection effect.

② There should be no possible obstruction between the transmitter and receiver. Such as: cover caused by wind blowing and swaying trees, etc.

③When using a reflector to assist in warning, the warning distance should be shorter than that in the opposite direction. The following is a schematic diagram of the use of reflectors to assist warning (see Figure 1).

Figure 1

④ Pay attention to protecting the lens during installation. If there is dust, wipe it clean with lens paper.

(6) The installation of microwave-passive infrared dual technology detectors should meet the following requirements 2.

① Wall-mounted microwave-passive infrared dual technology detectors should be installed at an angle of 45° to the direction of possible intrusion. The orientation of the angle (if restricted by conditions, priority should be given to the detection sensitivity of the passive infrared unit), the height is about 2.2m, and the inclination angle between the detector and the wall should be determined according to the specific prevention conditions.

② Ceiling-mounted microwave-passive infrared dual technology detectors are generally installed on the ceiling near the key prevention parts and must be installed horizontally.

③ Corridor-type microwave-passive infrared dual technology detector must be installed at the end of the corridor, with the field of view facing the direction of the corridor, and a height of about 2.2m.

④ There are no obstructions or possible obstructions directly in front of the detector.

⑤For other installation precautions of microwave-passive infrared dual technology detectors, please refer to the installation of passive infrared detectors

.

(7) The installation of the sound-activated-vibration dual-technology glass break detector should meet the following requirements:

① The detector must be firmly installed on the wall or ceiling near the glass.

② Cannot be installed above the curtain box above the protected glass.

③ After installation, the sensitivity of the glass breakage simulator should be carefully adjusted.

(8) The installation of the magnetic switch controller should meet the following requirements:

① The magnetic switch controller should be firmly installed on the door or window to be guarded, at a distance from the door or window The distance between the handle and the hand is 150MM.

② The tongue reed is installed on the fixed door and window frame, and the magnet is installed on the movable door and window. The two should be aligned with a distance of about 0.5cm.

③ When installing the magnetic switch detector (especially the concealed magnetic switch), there should be strong impact to prevent the reed tube from rupturing.

(9) The installation of cable vibration detectors should meet the following requirements:

① When installing on a mesh fence, the signal processor (interface with the pile of the fence) needs to be The cable should be laid at 2/3 of the height of the grid.

② When laying the vibration cable, it should be fixed every 20cm, every ring with a radius of about 8cm (as shown in Figure 2). /p>

③ If the security perimeter needs to pass through the gate, the cable can be inserted into the metal pipe and drilled to a depth of 1m underground.

④ Special treatment must be done at the corners of the perimeter. Prevent cables from bending into dead ends and wearing out.

⑤ During construction, cables must not be pulled or twisted excessively, and the cable sheath must not be damaged. The cable end treatment should comply with the requirements of the "Construction and Acceptance Specifications for Electrical Device Installation Projects". And add moisture-proof treatment.

(10) The installation of electric vibration detectors should meet the following requirements:

① Keep away from vibration sources and objects that may cause vibration. For example, keep away from indoors. Refrigerators; do not install them outdoors under trees, etc.

② Electric detectors are usually installed on walls, floors or safes where intrusion may occur. The vibration direction of the sensor in the detector should be as close as possible to the possible intrusion. The vibration direction should be consistent and connected firmly.

③When buried underground, it should be buried 10cm deep and the surrounding soil should be compacted.

4. Installation of alarm controller< /p>

(1) The installation of the alarm controller should comply with the requirements of the "Code for Construction and Acceptance of Electrical Installation Engineering"

(2) When the alarm controller is installed on the wall, its bottom edge should be installed. The height from the floor should not be less than 1.5m, and there should be enough space for movement in the front.

(3) The alarm controller must be installed firmly and straightly, and reinforcement measures should be taken when it is installed on a loose wall. .

(4) The cables or wires introduced into the alarm controller should meet the following requirements:

① The wiring should be arranged neatly, not allowed to cross, and should be firmly fixed.

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② The ends of the leads should be numbered, and the serial numbers should be consistent with the drawings, and the writing should be clear and not easy to fade.

② Each terminal on the terminal board should not have more than two wires.

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④Leave a margin of not less than 20cm for the cable core and wires.

⑤The wires should be bundled into bundles.

⑧When the wires are introduced into the conduit. The pipe should be blocked.

(5) The alarm controller should be firmly grounded, and the grounding resistance should be less than 40 (when using a joint grounding device, the grounding resistance should be less than 10).

Grounding should be clearly marked.

5. Debugging of alarm system

(1) General requirements

⑦ Debugging of alarm system should be carried out after the decoration of the building and the construction of the system are completed.

② Before debugging the alarm system, the drawings and materials of the system design, the design change documents (notices) during the construction process, and the detection and acceptance records of concealed projects should be available.

③The person in charge of debugging must have an intermediate professional technical title or above and be an engineering technician who is familiar with the system.

④Have the instruments and equipment used for debugging, and these instruments and equipment meet the measurement requirements.

⑤ Check the construction quality and communicate well with the construction team.

(2) Debugging

① Before starting debugging, the circuit should be checked first, and misconnections, open circuits, short circuits, virtual soldering, etc. should be effectively dealt with. ?

② Debugging work should be carried out in partitions, from small to large.

② After the alarm system is powered on, the working status of the system should be checked according to the relevant requirements and system design functions of the "General Technical Conditions for Anti-Theft Alarm Controllers". The main inspection contents are:

a. The alarm function of the alarm system includes emergency alarm, fault alarm and other functions.

b. Self-check function.

c. Number the detector and check the alarm position display function.

d. The arming and disarming functions of the alarm controller.

e. Monitoring or intercom function.

f. Alarm recording function.

g? Automatic power conversion function.

④Adjust the detector sensitivity to keep the system in optimal working condition.

⑥ Power on the entire alarm system continuously for at least 12 hours, observe and record its working status. If there is a fault or false alarm, the cause should be carefully analyzed and effective treatment should be taken.

⑧After the debugging work is completed, fill in the debugging report. The debugging report can be drawn in the "Intrusion Alarm, TV Monitoring System Debugging Report" () drawn in this manual; it can also be prepared by the debugging unit itself.

(3)Write a completion report.

3. Construction requirements for TV surveillance projects

1. General requirements

(1) There must be an on-site engineer at the construction site to guide the construction and coordinate with the construction unit to detect and accept concealed projects.

(2) The following drawings and materials should be available before the construction of the TV surveillance project:

① System principle and system connection diagram.

②Equipment installation requirements and installation drawings.

③ Design and equipment layout of the central control room.

④Pipeline requirements and pipeline laying diagram.

(3) The construction of the TV monitoring system should be carried out according to the design drawings and shall not be changed at will. When it is really necessary to change the original drawings, they should be reviewed and approved according to the procedures, and the approval documents (notices, etc.) must be signed by the authorized persons of both parties before they can be implemented.

(4) When the TV surveillance system project is completed, the construction unit shall submit the following drawings and materials:

⑦ All drawings and materials received before construction.

②As-built drawing of the project.

② Design change file.

2． Cable laying

(1) It must be laid according to the drawings, and the construction quality should comply with the requirements of the "Cable Design Code for Electric Power Engineering".

(2) The instruments, equipment, tools and construction materials required for construction should be prepared in advance. If there are obstacles on the construction site, they should be removed in advance.

(3) Select cables according to the requirements of the design drawings and try to avoid cable connections. The connection must be made by welding or using a special connector.

(4) Power cables and signal cables should be laid separately.

(5) Try to avoid harsh environments when laying cables. Such as high temperature heat sources and chemical corrosion areas.

(6) Stay away from high-voltage lines or high-current cables. If they are difficult to avoid, they should be equipped with metal pipes to prevent interference.

(7) When laying cables simultaneously with the construction of the building, the pipelines should be laid inside the building, and the pipeline materials and laying methods should be selected according to the building design specifications.

(8) In environments with strong electromagnetic field interference (such as near radio stations and TV stations), cables should be passed through metal pipes and buried underground as much as possible.

(9) When the electromagnetic field interference is very small, PVC flame retardant pipes can be used.

(10) Before the cable is threaded into the tube, the accumulated water and debris in the tube should be cleared away. Butter or talcum powder should be applied when threading. The cable entering the tube opening should be kept straight. There should be no joints or kinks in the cable inside the tube. , moisture-proof, anti-corrosion and other treatments should be done after wearing it.

(11) The distance between the two fixed points of the pipeline shall not exceed 1.5mo

(12) The cable should pass through the lower part of the connected equipment, leaving a certain margin.

(13) Cables laid in trenches or ceilings must be passed through pipes (metal pipes or PVC flame-retardant pipes should be used depending on the specific situation) and fixed on the wall.

(14) Mark and number the cable end.

3． Optical cable laying

(1) Before laying the optical cable, the optical fiber should be checked for breakpoints, indentations and other damages.

(2) Select the length of the optical cable according to the construction drawings. When distributing the panel, the connectors should avoid river ditches, traffic arteries and other obstacles.

(3) The bending radius of the optical cable should not be less than 20 times the outer diameter of the optical cable. Optical cables can be towed by a traction machine, and the ends should be technically treated. The traction force should be applied to the reinforced core. The traction force should not exceed 150kg, and the traction speed should be 10m/min; the length of the one-time pulling bow should not exceed 1kmo

< p>(4) The reserved length of the optical cable connector should not be less than 8mo

(5) After the optical cable is laid for a period, the optical cable should be checked for damage, and the optical cable laying loss should be randomly tested. When it is confirmed that there is no damage, Continue again.

(6) Optical cable splicing should be operated by specially trained personnel. Optical power meters or other instruments should be used to monitor the splicing to minimize splicing loss. After splicing, the splicing should be protected and the optical cable connector sheath should be installed.

(7) The end of the optical cable should be wrapped with plastic tape, coiled into a circle and placed in an optical cable reserve box. The reserve box should be fixed on the pole. When underground optical cables are led to electric poles, they must pass through metal pipes.

(8) When the optical cable is laid, the total loss of the channel needs to be measured, and the optical time domain reflectometer is used to observe the waveguide attenuation characteristic curve of the entire fiber channel.

(9) The splice points and terminals of optical cables should be permanently marked;

4. Installation of front-end equipment

(1) General requirements

① Install according to the installation drawings.

② Before installation, the installed equipment should be powered on and inspected.

②The installation quality should comply with the requirements of the "Electrical Device Installation Engineering and Acceptance Specifications".

(2) Installation of brackets and pan/tilts

① Check whether the pan/tilt rotates smoothly and whether there is any return movement when braking. After confirmation, lock the pan/tilt rotation according to the design requirements. starting point and end point.

② The bracket and the building, the bracket and the pan/tilt should be firmly installed. The outlet of the connected power cord and control cord should be fixed and leave a certain margin so as not to affect the rotation of the gimbal. The installation height should be based on the principle of meeting the prevention requirements.

(3) Decoder installation

The decoder should be firmly installed on the building and cannot be tilted or affect the rotation of the pan/tilt (camera).

(4) Camera installation

① The camera should be detected and adjusted before installation to ensure that the camera is in normal working condition.

② The camera should be firmly installed on the pan/tilt, and the length of the tail line should not affect the rotation of the pan/tilt (camera). The tail line must be protected.

③ Avoid backlighting as much as possible during camera rotation.

④ If the outdoor camera is significantly higher than the surrounding buildings, lightning protection measures should be taken.

⑤ During the process of moving and installing the camera, the camera lens cover must not be opened.

⑥When installing fixed cameras, please refer to the above requirements.

5. Installation of central control equipment

(1) Installation of monitor

①The monitor should be installed on the monitor cabinet (rack) upright and smoothly. There should be good ventilation and heat dissipation environment.

②The distance between the main monitor and the monitoring personnel should be 4.6 times the diagonal length of the main monitor screen.

③Avoid direct sunlight or artificial light sources on the fluorescent screen. The background illumination of the fluorescent surface shall not be higher than 100Lx.

④The distance between the back and side of the monitor cabinet (rack) and the wall should not be less than 0.8m o

(2) Installation of control equipment

①Control The table should be installed upright and smoothly, the equipment in the cabinet should be installed firmly, and the screws, washers, springs, washers, etc. used for installation should be installed as required and must not be left out.

② The plug-in equipment in the console or rack cabinet should be in reliable contact, installed firmly, and free from distortion or falling off.

③All leads in the monitoring room should be equipped with cable troughs and cable entry holes according to the locations of monitors and control equipment.

④ All leads must be left with margin when connected to the equipment and permanently marked for maintenance and management.

6． Power supply and grounding

(1) Measure the resistance of all ground electrodes and must meet the design requirements. If the requirements are not met, non-corrosive long-term resistance reducing agent can be added to the grounding electrode backfill or the grounding device can be replaced.

(2) The lightning protection grounding installation of the system should be constructed in strict accordance with the design requirements. It is best to carry out grounding installation at the same time as civil construction.

7. Debugging of the TV monitoring system

(1) General requirements

① The debugging of the TV monitoring system should be carried out after the decoration of the building and the construction of the system are completed.

② Before debugging the TV monitoring system, construction drawings and design change documents, as well as inspection and acceptance data for concealed projects, etc. should be available.

③The person in charge of debugging must have an intermediate professional technical title or above and be an engineering technician who is familiar with the system.

④Have the instruments and equipment used for debugging, and these equipment meet the measurement requirements.

⑤ Check the construction quality and communicate well with the construction team.

(2) Preparations before debugging

①Power supply detection. Turn on the main power switch of the console and check the AC power supply voltage; check the voltmeter reading on the regulated power supply; turn on the branch power switch and check the voltage of each output terminal and the polarity of the DC output, etc. After confirmation, energize each circuit.

②Line inspection.

Check whether the various wiring connections are correct. Use a 250V megger to measure the control cable. The insulation resistance between the wire cores and between the wire cores and the ground should not be less than 0.5MO. Use a 500V megohmmeter to measure the power cable. The insulation resistance between the wire cores and between the wire cores and the ground should be The insulation resistance between them should not be less than 0.5M0.

②Ground resistance measurement. The metal protective pipes, cable trays, metal trunking, wiring steel pipes and metal shells of various equipment in the monitoring system should be connected to the ground to ensure reliable electrical access. The system ground resistance should be less than 40.

(3) Camera debugging

① Turn off the power switch of the console and monitor. If the device indicator light is on, turn off the camera power and the image will be displayed on the monitor screen.

②Adjust the aperture (electric aperture lens) and focus to make the image clear.

③Change the focal length of the zoom lens and observe the image clarity during the zoom process.

④ Remote control pan/tilt, if the image clarity does not change much when the camera is stationary and rotating, the camera is considered to be working normally.

(4) Debugging of the PTZ

① Remote control the PTZ to rotate it up, down, left and right in place. If there is no noise during the rotation (the noise should be less than 50dB) and no jitter , if the motor does not generate heat, it is considered normal.

② When the gimbal rotates significantly, the following situations should be handled promptly.

a. The tail lines of the camera and gimbal are tightened.

b. There is an obstruction during rotation. For example: whether the decoder, intercom, detector, etc. blocks the rotation of the camera.

c. There are backlight camera situations in key surveillance areas.

(5) System debugging

① System debugging is carried out after the stand-alone equipment is debugged.

②Number each camera according to the design drawings.

② Use the comprehensive test card to measure the horizontal clarity and grayscale of the system.

④ Check the linkage performance of the system.

⑤ Check the video quality of the system.

⑥If the site conditions permit and the construction unit agrees, change the position and brightness of the light to improve the image quality.

(6) After all system indicators meet the design requirements, the system can be turned on continuously for 24 hours. If there are no abnormalities, the debugging will be completed.

(7) Fill in the debugging report. The debugging report can be used as the "Intrusion Alarm, TV Monitoring System Debugging Report" drawn in this manual (see page 54); it can also be prepared by the debugging unit itself.

(8)Write a completion report.

Part 3

Intrusion alarm and TV surveillance project manual

1. Requirements for units and personnel using security projects

Intrusion alarm and TV monitoring systems only play alarm and monitoring functions in the entire security prevention system and cannot achieve the purpose of security prevention. Generally speaking, a complete security prevention system should include: technical system, physical prevention and personnel prevention, that is, "human defense, technical defense, and physical defense". Practice has proved that only these three are organically combined. In order to give full play to the role of technical systems. Therefore, units with advanced technical systems such as intrusion alarms and television surveillance must not ignore the role of human defense and physical defense, and must always keep the human factor in mind.

1． Civil defense and technical defense

(1) There must be enough security forces to stop possible crimes to cooperate with the public security department in catching criminal suspects in a timely manner and ensure the safety of the country and people's lives and property.

(2) There must be a plan for capturing criminal suspects and conduct drills.

(3) Adhere to the leadership of the main leaders, strengthen team management and duty-keeping systems, and implement them in practice.

(4) To ensure the safety of personnel on duty, the central control room should be selected and built in strict accordance with the relevant standards of the security industry; other remedial measures should be taken for central control rooms that temporarily fail to meet the requirements. Ensure the security of the system center.

(5) Cooperate with the check-in staff to regularly test the sensitivity of the detector and deal with any problems in a timely manner.

(6) The central control room should be equipped with self-defense weapons and fire-fighting equipment that can be used by check-in personnel, and should be able to send emergency alarms to the outside world (security duty room or public security agencies) at any time.

(7) During severe weather or technical system maintenance, on-site security must be strengthened to prevent accidents.

(8) Establish a daily maintenance system for technical systems and implement it to everyone.

(9) On-site staff must understand the precautions for using technical equipment to avoid artificial false alarms.

(10) Once a police situation occurs, you should actively cooperate with the public security organs to solve the case.

2． Rules for check-in personnel

(1) Love your job and have good psychological quality.

(2) I have no criminal history.

(3) Study the business seriously, master the system operating procedures proficiently, turn on the computer on time, and do not shut down without permission.

(4) Strictly abide by the confidentiality system, and do not bring irrelevant personnel into the central control room without permission; do not lend video tapes, audio tapes, etc. to others.

(5) Be on duty on time, stick to your post, ensure that the successor is not in place, and those who are on duty will not be laid off, and strictly guard against being laid off.

(6) Keep duty records carefully.

(7) Take good care of the equipment and keep it in clean and good working condition. If the equipment encounters any of the following situations, report it promptly:

① Abnormal fever ② Emission of peculiar smell

< p>③Abnormal noise ④Leads falling off

⑤Other abnormal working conditions

(8) During the system maintenance, you should actively cooperate with the maintenance personnel.

(9) Check-in personnel are not allowed to leave the central control room without authorization at any time and under any circumstances.

(10) Don’t panic when encountering the police and actively assist security and public security personnel in capturing criminal suspects.

2. Use of intrusion alarm system

1. The basic concept of intrusion alarm system

When criminals invade the protected area and try to steal, the technical system that can promptly notify the check-in personnel of the intrusion signal is called intrusion alarm system. The intrusion alarm system consists of three parts: detector (including emergency alarm device, such as emergency button, foot, pick, pedal, etc.), channel and alarm controller.

The detector is commonly known as the probe. Its function is to convert the intrusion detection signal into an electrical signal that can be transmitted in the channel. Commonly used detectors include passive infrared detectors, active infrared detectors, microwave-passive infrared dual technology detectors, glass break detectors, etc.

Channel is the medium for transmitting signals. Its function is to transmit the electrical signal carrying alarm information sent by the detector to the alarm controller in a timely and accurate manner. Channels are divided into wired channels and wireless channels. Wired channels include: twisted pairs, telephone lines, coaxial cables, optical cables, etc.; wireless channels are radio waves propagating in free space. There are three groups of radio frequencies allocated by the National Radio Regulatory Commission for the exclusive use of alarm systems:

The first group is 36.050MH2 36.075MHz 36.125MHz

The second group is 36.350MH2 36.375MH2 36.425MH2

The third level is 36.650MHz 36.675MHz 36.725MH2

It also stipulates that the transmitting power should be within one watt, and the maximum upon approval shall not exceed 10 watts.

Since January 1, 1999, two more micro-power frequencies have been put into use, namely 315.0~316.0MHz and 3430.0~432.0MHz, and the electric field intensity emitted by wireless alarm equipment is limited. It shall not exceed 6000Pv/m at a distance of 5 meters from the equipment.

Alarm controller. A device that can receive electrical signals carrying alarm information transmitted through a channel, and after signal processing, issue an audible and visual alarm and display the alarm location is called an alarm controller.