CECS : 6294 Engineering design specification for sound reinforcement communication systems in industrial enterprises CECS62:94
Some standard content:
tp//:www.wangd.comThe most professional electrical website engineering construction standard full text information system
CECS62:94
China Engineering Construction Standardization Association Standard
Industrial Enterprise Sound Reinforcement Communication System Engineering
Design Specification
Engineering Construction Standard Full Text Information System
tp//:www.wangd.comThe most professional electrical website engineering construction standard full text information system
China Engineering Construction Standardization Association Standard
Industrial Enterprise Sound Reinforcement Communication System Engineering
Design Specification
CE CS62:94
Editor: Beijing Iron and Steel Design and Research Institute, Ministry of Metallurgical IndustryApproval department: China Association for Engineering Construction StandardizationApproval date: 1
199412
Engineering Construction Standard Full Text Information System
ww.wangd.com
tp//:www.wangd.comThe most professional electrical website Engineering Construction Standard Full Text Information System
Now approve the "Engineering Design Code for Sound Reinforcement Communication System of Industrial Enterprises" CECS62:94 as the standard of China Association for Engineering Construction Standardization, and recommend it to all engineering construction design and construction units for use.
In the process of implementing this code, please pay attention to accumulating information and summarizing experience. If you find that there is a need for modification or supplement, please send your opinions and relevant information to the Secretariat of the Communication Engineering Committee of China Association for Engineering Construction Standardization (No. 11, Anhuili 2nd District, Chaoyang District, Beijing, Beijing Design Institute of the Ministry of Posts and Telecommunications, Postal Code 100101) for reference in future revisions.
China Association for Engineering Construction Standardization
December 6, 1994
Engineering Construction Standard Full Text Information System
ww.wangdcom
tp//:www.wangd.com The most professional electrical website Engineering Construction Standard Full Text Information System
Sound reinforcement communication
Transmission lines
Power supply, grounding
Building requirements·
Appendix A Explanation of terms used in this code
Additional notes
Engineering Construction Standard Full Text Information System
.................
f.wangdcon
tp//:www.wangd.com The most professional electrical website Engineering Construction Standard Full Text Information System
1 General
1.0.1 This code applies to the engineering design of sound reinforcement communication in the noisy environment of industrial enterprises. The engineering design of the sound reinforcement communication system of industrial enterprises should be technologically advanced, economically reasonable, safe and applicable, and ensure quality.
1.0.2 The engineering design of the sound reinforcement communication system should be compatible with the development plan of the enterprise, meet the requirements of production technology and enterprise management, and be comprehensively considered in combination with the characteristics and scale of the industrial enterprise, and should comply with the following provisions:
1.0.2.1 When the voice information transmission between production needs to be timely, fast, and noise-resistant, and when both sound reinforcement paging and telephone communication are required, sound reinforcement communication should be used. 1.0.2.2 When rapid communication is required between production positions and the workplace has one of the following conditions, sound reinforcement communication should be used: (1) The noise level is 70-110dB (A); (2) The production is continuous, the operation is intense and frequent, the operator should not leave the production position, or it is difficult to use the telephone communication; (3) On mobile equipment (such as cranes, electric shovels, electric locomotives, electric drilling machines, etc.); (4) The work surface where production personnel are dispersed or mobile; (5) When the operator or maintenance personnel need to go back and forth. 1.0.3 This code is applicable to the design of new or expanded projects of industrial enterprises or other enterprises that need to set up sound reinforcement communication.
1.0.4 In addition to being implemented in accordance with this code, the design of sound reinforcement communication system projects shall also comply with the relevant provisions of the current national standards "Industrial Enterprise Communication Design Specification" (GBJ42-81) and "Industrial Enterprise Communication Grounding Design Specification" (GBJ79-85). Engineering Construction Standard Full Text Information System
wangdcom
tp//:www.wangd.com The most professional electrical website Engineering Construction Standard Full Text Information System
2 Terminology
2.0.1 Instruction Communication Multifunction Instruction Communication Sys-tems or pager or paging system A multifunctional sound reinforcement communication device that can realize central or non-central dispatching contact, full call or group call instructions, conversation, interruption conversation, conference conversation, etc. 2.0.2 Simplex operation
A method of communication in which both parties cannot send and receive at the same time, but can only send and receive in one direction.
2.0.3 Duplex operation
A method of communication in which both parties can send and receive at the same time. 2.0.4 General calling
The switchboard sends a pre-defined selection signal to call all extensions. 2.0.5 Group calling
The switchboard sends a pre-defined selection signal to call a predetermined group of extensions.
2.0.6 Individual calling
The switchboard sends a selection signal to call only one predetermined extension. 2.0.7 Two-wire system
A communication method in which the sending and receiving signals are transmitted simultaneously on a pair of wires. 2.0.8 Four-wire system A communication method that transmits and receives signals on two pairs of wires. 2.0.9 Amplifying communication Amplifying communication refers to a communication method that is used in a noisy environment or at an operating position and is processed by voice amplification. Production amplification and command communication belong to the same category of amplifying communication, collectively referred to as amplifying communication.
Engineering Construction Standard Full Text Information System
wangd.com
tp//:www.wangd.com The most professional electrical website Engineering Construction Standard Full Text Information System
3 Amplifying communication
3.0.1 The setting of amplifying communication user points should be determined according to the actual needs of the production scale, production organization system and production contact of the industrial enterprise. 3.0.2 In workshops that require unified dispatching and command in production, where each production position needs to communicate quickly and where the user environment has a certain amount of noise, a two-way amplifying communication system should be set up. 3.0.3 For workshops with a high level of mechanization, strong production continuity, and communication information between production positions with a certain directionality, it is advisable to use a radiating selective calling and amplifying communication system. When the number of user points of a system does not exceed 10, a co-linear selective calling and amplifying communication system can be used. 3.0.4 When communication or dispatching commands do not need to be heard by unrelated units at the same time, a selective amplifying communication system should be set up.
3.0.5 For continuous production, when unified orders need to be issued in production, communication information has a certain degree of commonality, and when multiple operating tables and points need to be notified at the same time, a co-linear amplifying communication system should be used.
3.0.6 For positions with a high level of mechanization that need to respond to each other and cooperate closely at any time, a centralized or decentralized two-way amplifying communication system should be set up. 3.0.7 For large workshops with relatively complex production processes, strong continuity, and requiring cooperation from multiple parties, two-way or one-way amplifying communication systems should be set up according to the needs of the production process. 3.0.8 Two-way amplifying communication should adopt a duplex call mode. The simplex communication mode is used only when the acoustic feedback cannot be solved and it is easy to cause humming. 3.0.9 The two-way sound amplification communication system should adopt the host centralized power supply or centralized amplification device.
When the dispatcher needs to issue workshop-wide production orders or find mobile workers, and other sound amplification communication systems installed in the workshop cannot meet the requirements, a one-way sound amplification communication system should be set up.
3.0.11 The sound amplification communication system should adopt a constant voltage output amplifier. For continuous production engineering construction standard full text information system
wwangd.com
tp//:www.wangd.com The most professional electrical website engineering construction standard full text information system
factories and mines, the main sound amplification communication equipment should be equipped with two sets for switching. 3.0.12 The total power of the centralized amplification host amplifier should have a spare capacity. The total power should be greater than 10% to 30% of the total rated power of the user speakers in the system. 3.0.13 Sound amplification communication can also be equipped with a recording device as needed. 3.0.14 At each user point on the operating table or in the working range of frequent inspections, within the specified ambient noise level range, the output sound pressure level of the speaker should be 10dB higher than the ambient noise level.
The selection of speakers should meet the following requirements: 3.0.15.1 Horn-type speakers should be used for non-indoor user points. 3.0.15.2
In the factory where the noise is greater than 70dB (A), 10-25W simple speakers should be used.
3.0.15.3 In the operating table room, 3-5W dynamic speakers should be used. 3.0.15.4 In the laboratory, the cab noise is below 60dB (A) or the dispatching room with sound insulation measures, 1-3W speakers or dynamic speakers should be used. 3.0.16 The installation height of the speaker should be 3-5m in the workshop and 5-10m outdoors.
Engineering Construction Standard Full Text Information System
wangd.com
tp//:www.wangd.comThe most professional electrical website Engineering Construction Standard Full Text Information System
4 Transmission Line
4.0.1 The line of one-way amplification communication should adopt a single-loop line transmission method. The transmitter line of centralized two-way amplification communication should adopt a radial line transmission method. When the transmitter is connected in parallel on the line, the same call loop should not exceed 10 user points, and a device that can monitor the user line should be installed. 4.0.2 For centralized two-way or one-way amplification communication, the maximum attenuation value of the line from the loudspeaker to any speaker should not be greater than 4dB (at a frequency of 1000Hz). 4.0.3 When using decentralized two-way amplification communication, the maximum attenuation value of the line between two loudspeakers should meet the equipment requirements.
4.0.4 In factories with higher requirements, the sound amplification communication lines should be laid through pipes in the walls or other structures, or along the cable tray. 4.0.5 In general factories, the sound amplification communication lines should be laid along the walls or along the roof structure. In areas where mechanical damage may occur, the exposed pipe laying method should be adopted. 4.0.6 The laying height of the exposed pipes of the sound amplification communication lines in the factory should be 3 to 5 meters, and the installation height of the branch line equipment should be 2 to 2.5 meters. 4.0.7 Thicker steel pipes should be used for exposed pipes, and hard plastic pipes should be used in workshops with corrosive gases. Thinner steel pipes or plastic pipes should be used for concealed pipes in buildings, and thicker steel pipes should be used in areas susceptible to heavy pressure. Steel pipes should be used and grounded in places susceptible to electromagnetic interference.
4.0.8 When laying cables in pipes, the diameter utilization rate of straight pipes should be 50% to 60%, and the diameter utilization rate of curved pipes should be 40% to 50%. When laying twisted wires in pipes, the cross-sectional utilization rate of the pipes should be 20% to 25%. When laying parallel wires in pipes, the cross-sectional utilization rate of the pipes should be 25% to 30%. 4.0.9 It is advisable to install a dark wire box or an open pipe inspection box every 30m for straight pipes. The center angle of the curved pipe should not be less than 90°. If there are two bends, the bends should be close to the two ends of the pipe respectively, and should not be bent into an S shape. The distance between dark wire boxes or inspection boxes should not exceed 15m.
Explosion-proof measures should be adopted in areas with explosion hazards, and should be implemented in accordance with the provisions of the current national standard "Design Specifications for Electrical Installations in Explosive and Fire Hazardous Environments" (GB50058-92).
Engineering Construction Standard Full-text Information System
wangd.con
tp//:www.wangd.comThe most professional electrical website Engineering Construction Standard Full-text Information System
5 Power supply, grounding
5.0.1 Centrally powered two-way sound amplification host should be powered by AC according to the secondary load. When there is no condition to power the secondary load, a backup DC power supply should be set. Centrally powered two-way sound amplification host that requires uninterrupted use can be equipped with an uninterruptible power supply device. The power supply of distributed two-way sound amplification communication should adopt centralized control power supply. 5.0.2 When the total capacity of centralized two-way sound amplification communication is 500W or more or the number of distributed sound amplification communication is 8 or more, a power distribution board should be set. 5.0.3 The backup power supply device should be composed of a closed battery, which is usually used when the AC power is off.
5.0.4 The two-way amplification communication host should be grounded, and the grounding body can use the nearest metal frame. When the equipment has grounding resistance value requirements, it should meet the requirements. 5.0.5 The one-way amplification communication host should be grounded for zero protection. 5.0.6 The protective grounding resistance value and grounding device requirements of the amplification communication host should refer to the relevant provisions of the "Industrial Enterprise Communication Grounding Design Specification" (GBJ79-85). Engineering Construction Standard Full Text Information System3 The backup power supply device should be composed of a closed battery, which is usually used when the AC power is off.
5.0.4 The two-way amplified communication host should be grounded, and the grounding body can use the nearest metal frame. When the equipment has grounding resistance value requirements, it should meet the requirements. 5.0.5 The one-way amplified communication host should be grounded for zero protection. 5.0.6 The protective grounding resistance value and grounding device requirements of the amplified communication host should refer to the relevant provisions of the "Industrial Enterprise Communication Grounding Design Specification" (GBJ79-85). Engineering Construction Standard Full Text Information System3 The backup power supply device should be composed of a closed battery, which is usually used when the AC power is off. bzxz.net
5.0.4 The two-way amplified communication host should be grounded, and the grounding body can use the nearest metal frame. When the equipment has grounding resistance value requirements, it should meet the requirements. 5.0.5 The one-way amplified communication host should be grounded for zero protection. 5.0.6 The protective grounding resistance value and grounding device requirements of the amplified communication host should refer to the relevant provisions of the "Industrial Enterprise Communication Grounding Design Specification" (GBJ79-85). Engineering Construction Standard Full Text Information System
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.