This standard specifies the terms related to lightning protection for information systems. This standard applies to lightning protection for information systems. GB/T 19663-2005 Terminology for lightning protection for information systems GB/T19663-2005 Standard download decompression password: www.bzxz.net

ICS 29. 240. 10
National Standard of the People's Republic of China
GB/T 19663---2005
Terms for lightning protection of information systems
Ierms fer lighting protection of information syster2005-01-27Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaAdministration of Standardization of the People's Republic of China
Implementation on 2005-06-01
GB/T19663—2005
In order to standardize the terms and terminology of lightning protection of information systems, this standard defines the terms and terminology related to lightning protection of information systems. The terms and terminology listed in this standard are collected and organized from relevant EC standards, IEEE standards and Chinese national standards and industry standards.
This standard is proposed and coordinated by the National Lightning Protection Technical Standardization Committee. This standard is drafted by Tsinghua University. The participating units include the Monitoring Network Department of the China Meteorological Administration, Sichuan Zhongguang Information Protection Engineering Co., Ltd., Chongqing Lightning Protection Safety Working Committee Office. The main drafters of this standard are: He Jinliang, Chen Shuiming, Zeng Rong, Pan Zhenglin, Liu Shouxian, Li Liangfu. This standard is released this time.
1 Scope
Terms of lightning protection for sensing systems
This standard specifies the technical terms for lightning protection for information systems. This standard applies to information systems that require lightning protection. 2 Basic terms
Protection
The application of methods and means to prevent excessive interference electrical energy from propagating into the designed interface. 2.2
Exposure
GB/T19663—2005
The state in which the product is under the direct influence of certain natural or simulated environmental factors. Natural exposure refers to the product being subjected to normal working conditions. Accelerated exposure refers to the product being subjected to more severe conditions. 2.3
Impulse
A unipolar voltage or current wave without obvious oscillation, which rises rapidly to the maximum value and then usually slowly decreases to zero. Even with reverse polarity oscillation, its amplitude is small. The parameters defining impulse current and impulse voltage are: polarity, peak value, wave front time and wave tail half-fall time
Low-voltage electrical and electronic equipmentow-voltageelectricalandelectranlecquipmenElectrical and electronic equipment with an input DC voltage of less than 1500V or an AC voltage root mean square value of less than 1000V. 2.5
Electrical equipment
Units that have a complete function in power generation, transformation, distribution or power consumption systems, such as motors, electrical appliances, measuring instruments, protective appliances, equipment and electrical appliances of wiring systems.
Electrical installationA combination of electrical equipment with mutually coordinated characteristics to achieve one or more specific purposes. 2.7
Fault
Any unexpected change that disrupts normal operation. 2.8
Over-current
Current that exceeds the maximum rated current.
Over-voltage
Voltage that exceeds the maximum rated voltage.
GB/T19663—2005
Computer networkcomputer network
A network that interconnects data processing nodes for the purpose of data transmission. 2.11
computersystem
Computer system
One or more computers, peripherals or software that perform data processing. 2. 12
Interface
The interface between two functional components, which is specified by various functional characteristics, common physical interconnection characteristics, signal characteristics and other appropriate characteristics.
Feeder
The transmission line in the power transmission system,
Surge current
A transient current higher than the rated value that is applied to the electrical equipment 1 for a short period of time. It is also called surge current. 2.15
Surge voltage
A transient voltage wave propagating along the line or circuit. It is characterized by a rapid rise in voltage followed by a slow drop. It is also called conduction voltage. 2.16
Input protectioninput protectionon
Overcurrent and overvoltage protection between any two input terminals of an analog input channel, or overvoltage protection between any input terminal and ground. 2.17
Data dats
A reinterpretable formal representation of information suitable for communication, interpretation or processing. 2.18
Data communicationdata commmieation
The transmission of data from one place to another through a communication means. 2.19
Simultaneously accessible partsConductors or conductive parts that can be touched by people at the same time, or conductors or conductive parts that can be touched by animals at the same time in certain places. Simultaneously accessible parts can be: 1) Live parts (2) Exposed conductive parts: (3) External conductive parts (4) Protective conductors (5) Grounding electrodes. 2.20
External conductorexternal conductor
Insulated wire or line for electrical connection outside the equipment. It may be a power lead, or a connection between separate parts of the equipment, or it may be part of the fixed wiring.
External conductive partextraneuus conductive partconductive part that is not part of the electrical device. 2.22
External insulationexternal insulation
The exposed surface of the air space and solid insulation of the power equipment. It is subject to voltage and is affected by external conditions such as atmosphere, pollution, moisture, animals, etc.
Exposed cunductive partexposed cunductivepartconductive part of the electrical equipment that is not normally voltage-carrying but can be voltage-carrying under fault conditions. 2.24
Peripheral equipmentperipheral equipmentAny equipment controlled by a specific computer and capable of communicating with it. 2.25
Gatewaygateway
A functional component that interconnects two computer networks with different network systems. 2.26
Network
An arrangement of nodes and interconnected branches.
Leakage current
GB/T 19663--2005
Conduction current flowing in a path that should not be energized due to poor insulation, reflecting the quality of insulation performance. 2.28
Signal
A change in a physical quantity used to represent data (in a form) 2.29
Signal transmission systemThe transmission system between the signal sending device and the signal receiving device. 2.30
Head-end signal transmission system (1) When the signal is transmitted by frequency, the head-end of the signal transmission system is the output end of the transmitting device; (2) When the signal is transmitted by carrier or other means, the head-end of the signal transmission system is the input end of the modulating device; 2.31
Terminal of signattransmission system (1) When the signal is transmitted by frequency, the terminal of the signal transmission system is the input end of the receiving device; (2) When the signal is transmitted by carrier or other means, the terminal of the signal transmission system is the output end of the modulating device at the receiving end. 2.32
Signal transmission line (signal line) signaltransmissionline The transmission line in the signal transmission system.
Information
Indications about an object (such as facts, events, objects, processes or ideas, including concepts) have specific meanings in certain situations. 2.34
Information technology equipment (ITE) Equipment used for the following: (1) receiving data from an external source (e.g. input via a disk or data line); (2) performing some processing on the received data (e.g. calculation, data conversion, recording, archiving, storage and transmission); (3) providing data output (or sending to a service device or reproducing data and images).
Information system information system
An information processing system with related organizational resources (e.g. human resources, technical resources and financial resources) that provides and distributes information. GB/T19663—2005
Signal-to-noise ratio signal-noise ratio
The ratio of the useful host signal level to the electromagnetic noise level under specific conditions. 2.37
Suppression
Measures to eliminate unwanted electromagnetic interference. 2.38
User terminal
tscr terminal
A terminal that can communicate with a computer 2.39
Temporary overvoltage (Fov) A voltage that exceeds the root mean square value or the maximum DC value of the maximum continuous operating voltage in a system within a specific period of time. 2.40
Noise
A type of interference that affects the signal and can distort the information carried by the signal. 2.41
Terminal lerminal
A functional unit in a system or communication network that can be used to enter or retrieve data. 3 Terms related to power demand
Shielding angle
(1) The protection angle (of a lightning conductor to a conductor) is the angle formed by the sag line drawn through the lightning conductor to the horizontal plane and the line connecting the lightning conductor and the protected conductor. The protection angle is selected to provide a protection zone for the conductor so that almost all lightning strikes the conductor instead of the conductor. (2) The protection angle (of a lightning rod) is formed by the intersection of a vertical line through the top of the lightning rod and another straight line from the lightning rod to the earth at a selected angle to the vertical line. This straight line rotates along the vertical line at the top of the lightning rod to form a cone-shaped protection zone so that objects are located within this protection zone. This angle is selected so that lightning strikes the lightning rod instead of the objects located within the formed protection zone. 3.2bzxz.net
The shield wire (overhead power line or substation) is suspended above the phase conductor of a building, substation equipment or line. Its purpose is to prevent lightning from striking the line instead of the building, substation equipment or phase conductor. The lightning rod is composed of a down conductor of a lightning rod and a grounding device. Lightning rods are metal conductors used to intercept lightning strikes so that they do not fall on objects within the protection range of lightning rods. Down conductors are metal conductors that lead lightning current from lightning rods to grounding devices. Grounding devices are metal conductors buried in the soil that disperse lightning current into the soil.
Long stroke
Lightning strikes with a current duration (the time from 10% amplitude at the wave head to 10% amplitude at the wave tail) longer than 2ms and shorter than 1s. 3.5
Specific energy
The integral of the square of the lightning current over the time during a lightning stroke. It represents the energy generated by the lightning current in a unit resistance. 3.6
Ground flash density (GFD) The average number of ground strikes per unit area per unit time in a local area. Electrogeometric model theory Electrogeometric model theory GB/T 19663—2005 Describes the electrogeometric model and the related analysis, including the theory of the relationship between the strike distance and the amplitude of the first main discharge for the different elements of the model. Electrogeometric model (EGM) A geometric model that relates the dimensions of a facility to the lightning current using appropriate analytical formulas and can predict whether the lightning will strike the shielding system, the earth or the protected facility components. 3.9 Short stroke Short stroke A lightning stroke with a half-peak time of the pulse current less than 2 seconds. 3.10 More thunderstorm region An area with an average number of thunderstorm days exceeding 20 but not exceeding 40. 3.11 Lightning protection zone (LPZ) An area where the lightning environment needs to be specified and controlled. 3.12
Indirect lightning indirect lightuing flash strikes the earth, other objects or internal circuits of the inlet equipment connected to the building near the building. 3. 13
Indirect lightning frequency indirect lightning flash frequency the expected number of indirect flashes per year.
Negative shieiding angle negative shieiding angle Note: the protection angle formed when the shielding line is located outside the outermost conductor of the transmission line or outside the outermost part of the building. 3.15
Big thnnderstorm region the area with an average number of thunderstorm days exceeding 40 but not exceeding 60. 3.16
Fault frequency frequency of damag
The average number of expected faults caused by lightning per year. 3. 17
Rolling sphere method rolling sphere method
A simplified analysis method using electrical geometry theory in building lightning protection analysis. The rolling ball method involves rolling an imaginary ball of a specified radius along the surface of the protected object. The ball is supported by lightning rods, lightning conductors, fences and other grounded metal bodies, and rolls up and down for the calculation of the electrical protection range. If a device is below the protective curved surface formed by the rolling ball, it is protected. Equipment that touches the ball or penetrates its surface is not protected.
CB/T19663—-2005
Ring conductor ring conduetoz
A conductor that forms a loop around a building, which is interconnected with the building's lightning down conductors and distributes the lightning current more evenly among the down conductors.
Striking distance
The maximum length jumped when the potential of the ladder exceeds the maximum gap's breakdown resistance performance. This length is related to the amplitude of the first main fault.
Lightning flash frequency to the structure The expected frequency of lightning flashes directly and indirectly received by the structure. 3.21
Accepted frequency of damage to the structure Accepted frequency of damage to the structure The maximum expected frequency of damage that the structure can withstand. 3.22
Air-terminal system
The lightning rod, lightning strip (wire), lightning net directly intercepted by lightning, and the metal roof and metal components used for lightning termination. 3.23
Accepted lightning flash requirement The annual average maximum frequency of lightning flashes that can cause damage to the structure. 3.24
Thunderstorm
The weather phenomenon with lightning and/or showers of rain produced by cumulonimbus clouds. 3.25
Thunderstorm day
A thunderstorm day is a day when more than one thunderstorm can be heard in one period. 3.26
Thunderstorm hours
A thunderstorm hour is a hour when more than one thunderstorm can be heard. 3.27
Lightning surge on incomning services Due to the effect of lightning on overhead lines or metal pipelines, lightning waves may enter the house along these pipelines, endangering people or damaging environmental equipment.
Electromagnetic induction of lightning Rapidly changing lightning current produces a transient strong electromagnetic field in the surrounding space, inducing a high electromotive force on nearby conductors. It includes electrostatic induction and electromagnetic induction, which may cause sparks between metal parts. 3.29
Lightning electromagnetic pulse (LEMP)Electromagnetic radiation associated with lightning discharge. The generated electric and magnetic fields can couple into electrical or electronic systems, producing destructive surge currents or surge voltages.
Efficiency of lightning protection system efficiency of lightning protection systemGB/T 19663—2005
The ratio of the number of direct lightning strikes that do not cause damage to buildings or equipment to the number of direct lightning strikes that are connected to the building or equipment 3.31
Lightning overvoltageLightning overvoltageThe transient overvoltage that occurs at a certain position in the system due to a specific lightning discharge. 3.32
Lightning activity levelkeraunlc level
The average number of thunderstorm days or thunderstorm hours per year in a specified area (1) The level of lightning activity is called thunderstorm day; (2) The level of lightning activity per hour is called thunderstorm hour.
Electrostatic induction of lightning Electro ... 3.38
total charge of lightning current the time integral of the lightning current over the entire duration of the lightning flashover. 3.39
lightning danaging risk the average annual loss that may occur to a building or equipment due to a lightning strike. 3.40
lightning damage probability the probability of a lightning strike causing damage to a building or equipment. 3.41
lightning stroke
the discharge of a thundercloud to the earth and ground objects. 3.42
lightning strike point the point where lightning strikes the earth and ground objects. GB/T 19663—2005
evaluation of lightning strike risk a comprehensive calculation and analysis method to determine the level and category of protection according to the degree of damage to personnel and property caused by the lightning strike. 3.44
Lightning outage
The disconnection of the switch caused by the clearance of the fault current formed by the lightning line flashover. 3.45
Lightning duration Ilash duration
The time the lightning current flows at the lightning strike point.
Lightning flash
The entire flash discharge consisting of one or more main discharges generated by the thundercloud. 3.47
Thunder sound
The sound of the air suddenly expanding on the discharge path during lightning. 3.48
Internal down-conductorInternal down-conductor is located inside a building protected from dew. 3.49
Strong thunderstorm regionA region with an average number of thunderstorm days exceeding 60. 3.50
Flashoverflashover
The phenomenon of breakdown discharge through the air surrounding an object (solid or liquid) or through the insulating surface of an object. 3.51
Upward flash
It starts from an upward leader of a ground object developing toward a thundercloud. An upward flash has at least one initial long lightning stroke with multiple short lightning strokes superimposed on it, which may be followed by multiple short lightning strokes and may contain one or more long lightning strokes. 3.52
lessthnderstormregion
Note: For areas with an average thunderstorm day of no more than 20, 3.53
first lightning strokeLightning strike to the ground starting when the head of the downgoing leader meets the upgoing leader on the ground. 3.54
Probability of damage
The probability of damage to a building caused by a lightning strike.
Stepped leader
The discharge process of static charge from a cloud into the air. Compared with the final strike current, the step leader current is small (on the order of 100 A). The step leader propagates randomly with a step length of 10m to 80m per step, with a speed of about 0.05% of the speed of light (150,000 In/s), until the step leader reaches the range of the struck point, the step leader will be directed to the struck point. 3.56
Downward flash
GB/T19663—2005
Starts from the downward leader generated by the thundercloud to the earth. A downward flash has at least one short-duration strike, which may be followed by multiple subsequent short-duration strikes and may contain one or more long-duration strikes. 3.57
Tolerable frequency of damageTolerabte frequency of damageThe maximum value of the expected annual average frequency of damage allowed under the conditions of direct and indirect lightning strikes on a certain equipment without requiring additional protection measures3.58
Positive shielding angleThe protection angle formed by the outermost conductor of a transmission line or the outermost interior of a building. 3.59
Direct lightningdirect lightningfash
Lightning that directly strikes a building or lightning protection device1. 3.60
Direct siruke protection (lightning) prevents lightning from directly striking buildings, structures, electrical networks or electrical devices. 3.61
Direct lighining flash frequency The expected number of direct lightning flashes that a building will be subjected to each year. 3.62
Synthetic lighting prolection technology For a key building electronic information system that needs to be protected from electricity, the building is protected from lightning by direct lightning protection technology, equipotential connection technology, shielding technology, perfect and reasonable integrated wiring technology, common grounding technology and installation of various types of SP knife technology from the outside and inside.
4 Terms related to electromagnetic compatibility
Conducted disturbance conducted disturbance The electromagnetic disturbance that occurs when energy propagates along a conductor. 4.2
Electromagnetic radiation The phenomenon that energy is emitted from a source to space in the form of radio waves; energy is transmitted in space in the form of electromagnetic waves. 4.3
Electromagnetic radiation hazard (EMRADHAz): Electromagnetic radiation reaches the level of harm to electrical equipment or systems. 4.4
Electromagnetic interference (EMI): The degradation of equipment, transmission channel or system performance caused by electromagnetic disturbance. 4.5
Electromagnetic environment: The sum of electromagnetic phenomena existing in a given place. GB/T19663--2005
Electromagnetic environmental effects (E3): The influence of electromagnetic environment on the working performance of electronic or electrical systems, equipment or devices. 4.7
Electromagnetic compatibility Electromagnetic compatibility The ability of a device or system to operate normally in its electromagnetic environment and not cause unacceptable electromagnetic disturbance to anything in the environment.
Electromagnetic compatibility level Electromagnetic compatibilty level The maximum electromagnetic disturbance level expected to be applied to a device, equipment or system working under specified conditions. 4.9
Electromagnetic compatibility margin Electromagnetic compatibility margin The difference between the immunity limit of a device, equipment or system and the electromagnetic tolerance level: 4.10
Electromagnetic shielding Shielding that uses conductive materials to reduce the penetration of alternating electromagnetic fields into a specified area. 4.11
Electromagnetic disturbance Any electromagnetic phenomenon that may cause a reduction in the performance of a device, equipment or system or cause damage to living or non-living matter. 4.12
Electromagnetic noise A time-varying electromagnetic phenomenon that does not obviously transmit information, which may be superimposed or combined with useful signals. 4.13
Inductive coupling
The coupling between two or more circuits by means of the mutual inductance of the circuits. Note that the term inductive coupling usually refers to the coupling formed by mutual inductance, while the term direct inductive coupling refers to the coupling formed by the common self-inductance of each circuit. 4.14
Capacitive coupling
The coupling of capacitance between two or more circuits. 4.15
Resistive coupling
The coupling between two or more circuits by means of resistance between the circuits. 4.16
Radiated interference Electromagnetic interference transmitted through the air in the form of electromagnetic waves. 4.17
Interference
The effect of useless energy generated by one or more transmissions, radiation, induction or their combination on the reception of electronic equipment, which manifests as performance degradation, malfunction or information loss, and in serious cases, equipment damage. If there is no such useless energy, this consequence can be avoided. 4.18
Interference currentInterference current is the current generated by electromagnetic interference.
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