GOST 50571.22-2000 (IEC 60364-7-707-84) UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electrical installations of buildings Chast7 Requirements for special installations Section 707 GROUNDING information processing equipment Electrical installations of buildings. Part 7. Requirements for specical installations or locations. Section 707. Earthing requirements for the installation of data processing equipment OKS OKS 3402 91.140.50 29.120.50 Effective date 1/1/2002 Preface 1 to develop the All-Russian Research Institute for Electrification of Agriculture (VIESKh) and the All-Russian Research Institute of Standardization and Certification in Engineering (VNIINMASH), introduced by the Technical Committee for Standardization TC 337 "Electrical installations of residential and public buildings" 2 adopted and put into operation the Decree of the State Standard of Russia on Dec. 18, 2000 № 376-Article 3 of this standard are the authentic text of the international standard IEC 60364-7 - 707-84, "Electrical installations of buildings. Part 7. Requirements for special installations. Section 707. Grounding Equipment Information Processing with additional requirements that take into account the needs of the country's economy was first introduced 4 Type This standard is part of the state standards for electrical installations of buildings developed on the basis of the standards of the International Electrotechnical Commission IEC 364 "Electrical installations of buildings." It represents the authentic text of the international standard IEC 60364-7-707-84, except section 1, the qualifying features of this standard in the national energy Section 3, which eliminates ambiguity in the interpretation of terms and requirements (in italics) to reflect the needs of various industries economy, including agricultural production, as well as Annex B contains examples of data processing equipment, which includes the scope of this standard. The standard requirements are formulated to technology designed to protect against electric shock and the removal or restriction to an acceptable level of surge that may cause undesired operation of information technology equipment, as well as any other electronic equipment, sensitive to disturbance, such as medical, laboratory and etc. These tools include the grounding device, including the grounding of electrically independent, device adjustment and leveling of electric potentials, the electrical division of the network by isolating transformer. The numbering of chapters, paragraphs and subparagraphs of this standard, since section 707.4, consistent with the IEC 60364-7-707-84. This standard adopted the same numbering of the drawings, the same symbols as in IEC 60364-7-707-84. Requirements of the standard complement, modify or supersede the requirements of other private standards set state standards for electrical installations of buildings. The absence of references to the chapter, section or paragraph of the private standard means that the relevant requirements of the standard apply to this case. 1 Scope This standard applies to electrical installations of buildings used in all sectors of the economy, regardless of their affiliation and ownership, and establishes requirements for special installations, in particular to ground electrical containing information processing equipment. It is intended to design, installation, commissioning and maintenance organizations of all forms of ownership and professionals to develop, test and operating in the above-mentioned electrical grounding devices, including electrically independent grounding, the device adjustment and leveling of electric potentials (UVEP), including Local UVEP, security system low voltage (BSNN), isolation transformers, designed for the electrical separation of the electrical supply networks and other requirements that complement the IEC 364-7-707-84 and reflect the needs of the economy, in italics. The requirements of this standard are mandatory. 2 Normative references in this standard references to the following standards: GOST 7396.1-89 (IEC 83-75), electrical plug connectors for household and similar purposes. Basic dimensions GOST 30326-95 (IEC 950-86) / GOST R 50377-92 (IEC 950-86) Safety of information technology equipment, including electrical office equipment 30331.2-95 Standard (IEC 364-3-93) / GOST 50571.2- 94 (IEC 364-3-93) Electrical installations of buildings. Part 3. Key features Standard 30331.3-95 (IEC 364-4-41-92) / GOST 50571.3-94 (IEC 364-4-41-92) Electrical installations of buildings. Part 4. Security requirements. Protection against electric shock 30331.4-95 Standard (IEC 364-4-42-80) / GOST 50571.4-94 (IEC 364-4-42-80) Electrical installations of buildings. Part 4. Security requirements. Protection against thermal effects GOST 50571.10-96 (IEC 364-5-54-80) Electrical installations of buildings. Part 5. Selection and installation of electrical equipment. Chapter 54. Earthing and protective conductors GOST 50571.14-96 (IEC 364-7-705-84) Electrical installations of buildings. Part 7. Requirements for special installations. Section 705. Electrical installations of agricultural and livestock premises GOST 51323.1-99 (IEC 60309-1-99) Plugs, sockets and connectors for industrial applications. Part 1. General Requirements 3 (707.2) The definitions in this standard, the following terms and definitions: 3.1 information processing equipment: Units of electrical or electronic equipment, which individually or in the system configuration (network) to collect, process and store data. Input and output data can be carried out if necessary with the help of electronic equipment. 03/02 ground without interference: Compound with an earthing device (including electrically independent), in which the noise is coming from external sources does not lead to unacceptable violations of equipment or data processing equipment to which it is connected. Note-Sensitivity of amplitude-frequency characteristics varies depending on the type of equipment. 3.3 significant leakage current: The earth leakage current exceeding the preset values ??in accordance with GOST R 30326/GOST 50,377 for equipment handling information received electricity through the plug connector (male, female), corresponding to the requirements of GOST 7396.1. 3.4 Land (relative, reference): conductive and which is outside the zone of influence of any earthing of the earth's crust, the electric potential is assumed to be zero. 3.5 Local land: Part of the land, which is in contact with the grounding, the electric potential is influenced by current flowing from the earthing may be different from zero. In cases where the difference from zero potential of the land does not matter, instead of the term "local land" use the generic term "ground". 3.6 to 1 kV electrical installation: electrical, rated voltage not exceeding 1 kV. 3.7 conductive parts: Part ability to conduct electrical current. 3.8 exposed conductive parts: Affordable touch-conductive part. 03.09 sided conductive parts: conductive part that is not part of the installation. 3.10 conducting dangerous part: the conducting part, including the current-carrying, touching which may under certain circumstances cause an electric shock. 11.3 conductor: Part is designed to conduct electrical current a certain value. 03.12 live parts: Explorer or conductive parts designed to work under stress in normal operating mode of the installation. 3.13 grounding: Intentional electrical connection to a given point of the system or plant, or equipment to the local earth through the grounding device. 3.14 Functional grounding: Grounding for the normal functioning of the apparatus, the shell is at the request of the developer should not attend even the smallest electric potential (sometimes this requires the existence of a separate electrically independent earthing). 3.15 earthing device: A group of earthing and grounding conductors. 3.16 Earthing: Part of the grounding device, consisting of one or more electrically interconnected grounding electrodes. 3.17 electrically independent earthing (independent earthing): Grounding, located at a distance from other earthing that currents spreading from them have no significant effect on the electrical potential of the independent earthing. 3.18 grounding conductor: The conductor that connects the grounding point of the system or plant, or equipment grounding. 3.19 Functional grounding conductor (FE-conductor): The grounding conductor in electrical up to 1 kV, an employee for functional earthing. 3.20 grounding electrode (earthing electrode): A conductive part which is in electrical contact with the local land, either directly or through an intermediate conductive medium, such as through a layer of concrete or conductive corrosion-resistant coating. 3.21 potentsialovyravnivayuschy electrode: Same as the ground electrode, but used to equalize electrical potential. 3.22 equalizing electrical potential: The electrical connection of conductive parts with each other to achieve their equipotential. 3.23 protective equalizing electrical potentials: Equalizing the electric potentials in order to ensure electrical safety through the elimination of electrical potential difference between all simultaneously accessible exposed conductive parts of the touch of a stationary electrical equipment and third-party conductive parts, including metal parts of the building constructions, achieved a reliable connection of these parts with one another through conductors. 3.24 main earthing bus (the main earth terminal): Bus or clip, which is part of the electrical grounding device of up to 1 kW and is designed for multi-conductor electrical connection to earth. 3.25 grounding system (grounding system): The sum of the substation grounding devices, exposed conductive parts of the consumer and the neutral conductor in electrical systems up to 1 kV. 3.26 Type of ground: The indicator on the ratio of neutral to ground the transformer in the substation and the exposed conductive parts of the consumer and device neutral conductor. Designation of types of earthing systems - according to GOST R 50571.2 30331.2/GOST. Distinguish TN, TT and IT-system, the first two of which are grounded at the transformer substation, and the third - in isolation. TN-system on the device neutral conductor, in turn, is divided into TN-S-, TN-C-and TN-CS-system. 3.27 neutral: Intentional electrical connection to a neutral conducting part (neutral conductor) in electrical systems up to 1 kV grounded neutral transformer at the substation. 3.28 neutral conductor (N-conductor): The conductor in electrical systems up to 1 kV, intended for single-phase power and power consumers connected to the grounded transformer at the substation. 3.29 Electrical safety division chains: Branch circuits from each other by separating the transformer windings which are separated by a core, an additional one or reinforced insulation. 3.30 protective conductor (PE-conductor): The conductor in electrical systems up to 1 kV, intended for security purposes, connecting the exposed conductive parts of the consumer with a grounding device. 3.31 combined zero-worker and the protective conductor (PEN-conductor): The conductor in electrical systems up to 1 kV, which combines the functions of a zero-worker and protective conductors. 3.32 Extra Low Voltage (CNS): The voltage does not exceed values ??at which it is not dangerous to humans in areas with high-risk, high-risk and in outdoor settings. 3.33 system safe low voltage (system BSNN): The electrical system in electrical installations up to 1 kV, in which the voltage does not exceed the values ??of the CNS: - In normal operation, electrical, and - in the first insulation damage, including earth fault in other circuits. 3.34 The containment system of low voltage (system ZSNN): The electrical system in electrical systems up to 1 kV where the voltage does not exceed the values ??of the CNS: - In normal operation, electrical, and - in the first insulation fault, except for a ground fault in other circuits. 3.35 the system of functional extra-low voltage (system FSNN): The electrical system in electrical installations up to 1 kV, in which the voltage does not exceed the values ??of the CNS from considerations of its normal operation (the operation) and which can be used to protect against electric shock under certain conditions. 707 Ground Electrical containing information processing equipment 707.1 General requirements of this standard apply to information processing equipment in cases where: - the equipment is connected to the mains via plug connections GOST 7396.1, and is characterized by the leakage current in excess of the values ??set in the Standard 30326/GOST P 50,377 - equipment complies with current leakage requirements of GOST 30326/GOST P 50377. The requirements of this standard applies to electrical parts of buildings, from the point of connection equipment, counting on a course of movement of energy (the boundary between the electric facilities of the building and the equipment shown in Figure A.1 of Appendix A). These requirements apply to other installations or locations to which the equipment is connected with considerable leakage currents (eg industrial process control equipment, communications equipment, etc.) The requirements of this standard applies to electrical installations in agricultural production, in which the operating conditions of electrical equipment in the majority of significantly more complicated than in industry. This is due to increased humidity, the presence of corrosive vapors and gases that cause the one hand, the premature failure of electrical insulation of live parts of electrical equipment and wiring, with another - reducing the electrical resistance contact between standing on the damp floor man and land. In animal houses, along with the need to ensure the electrical safety of people required to take measures and to ensure the electrical safety of farm animals, which compared with a person more sensitive to electrical current. In addition, animals exposed to the so-called elektropatologii, which includes loss of productivity (a decrease in milk yield in dairy cows, reducing the gains from being fattening animals) under the influence of an electric voltage of small values. All this must be considered when choosing methods of protection, especially for electrical installations, containing information processing equipment, included in the automated process control system (automated line of forage, manure, processing and packaging of milk, etc.). Premature failure of isolation in such systems leads to significant leakage currents and requires special measures, which are formulated in this standard and GOST 50571.14. 707.4 707.471.3 Additional security requirements to protect people from electric shock for the equipment with a significant leakage current 707.471.3.1 requirements of this paragraph shall apply when equipment is a significant leakage current is connected to the electrical installation in all types of grounding systems. These requirements apply to electrical installation shown in Figure A.1. Additional requirements for TT earthing systems and IT in paragraphs 707.471.4 and 707.471.5. Notes 1 The electrical TN-C, in which zero workers and protective conductors to terminal equipment together in one common conductor (PEN-conductor), leakage current can be considered as the load current. 2 Equipment with large leakage currents may be incompatible with electric facilities, protected by a residual current devices off. In this case, you should consider the total leakage current due to leakage current equipment and discharge currents of capacitors, which can cause false positives UST. 707.471.3.2 information processing equipment must meet the requirements of GOST 30326/GOST P 50,377, to be stationary, connected with stationary Electrical installations of buildings either permanently or through electrical connectors for industrial use according to GOST R 51323.1. Electrical connectors in accordance with GOST 7396.1 should not apply. Note-For equipment with significant leakage currents it is important to check the integrity of the circuit ground, as indicated in the GOST R 50571.10: - during the commissioning of electrical installations - after any changes to the installation. It is recommended to periodically check the integrity of the circuit ground. 707.471.3.3 Additional requirements for information processing equipment with leakage currents greater than 10 mA If the leakage current, measured according to GOST R 50337 is greater than 10 mA, the equipment necessary to connect to the electrical installation in accordance with one of three options listed in paragraphs 707.471.3.3.1 - 707.471.3.3.3. Part 2. Section 1. General specifications GOST 2.702-75 Unified system for design documentation. Rules for making electronic circuits with GOST 2.752-71 Unified system for design documentation. Graphical symbols in diagrams. Robot device GOST 2.755-87 Unified system for design documentation. Graphical symbols in electrical circuits. Device switching and contact connections GOST 2.756-76 * Unified system for design documentation. Graphical symbols in diagrams. Is often perceived electromechanical devices GOST 2.757-81 * Unified system for design documentation. Graphical symbols in diagrams. Elements of the switching field for switching systems GOST 2.758-81 Unified system for design documentation. Graphical symbols in diagrams. Signal Technology GOST 2.762-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Frequencies and frequency bands for transmission systems GOST 2.763-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Device with a pulse-code modulation GOST 2.764-86 Unified system for design documentation. Graphical symbols in electrical circuits. Integrated optoelectronic display elements GOST 2.768-90 Unified system for design documentation. Graphical symbols in diagrams.
GOST 50571.22-2000 (IEC 60364-7-707-84) UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electrical installations of buildings Chast7 Requirements for special installations Section 707 GROUNDING information processing equipment Electrical installations of buildings. Part 7. Requirements for specical installations or locations. Section 707. Earthing requirements for the installation of data processing equipment OKS OKS 3402 91.140.50 29.120.50 Effective date 1/1/2002 Preface 1 to develop the All-Russian Research Institute for Electrification of Agriculture (VIESKh) and the All-Russian Research Institute of Standardization and Certification in Engineering (VNIINMASH), introduced by the Technical Committee for Standardization TC 337 "Electrical installations of residential and public buildings" 2 adopted and put into operation the Decree of the State Standard of Russia on Dec. 18, 2000 № 376-Article 3 of this standard are the authentic text of the international standard IEC 60364-7 - 707-84, "Electrical installations of buildings. Part 7. Requirements for special installations. Section 707. Grounding Equipment Information Processing with additional requirements that take into account the needs of the country's economy was first introduced 4 Type This standard is part of the state standards for electrical installations of buildings developed on the basis of the standards of the International Electrotechnical Commission IEC 364 "Electrical installations of buildings." It represents the authentic text of the international standard IEC 60364-7-707-84, except section 1, the qualifying features of this standard in the national energy Section 3, which eliminates ambiguity in the interpretation of terms and requirements (in italics) to reflect the needs of various industries economy, including agricultural production, as well as Annex B contains examples of data processing equipment, which includes the scope of this standard. The standard requirements are formulated to technology designed to protect against electric shock and the removal or restriction to an acceptable level of surge that may cause undesired operation of information technology equipment, as well as any other electronic equipment, sensitive to disturbance, such as medical, laboratory and etc. These tools include the grounding device, including the grounding of electrically independent, device adjustment and leveling of electric potentials, the electrical division of the network by isolating transformer. The numbering of chapters, paragraphs and subparagraphs of this standard, since section 707.4, consistent with the IEC 60364-7-707-84. This standard adopted the same numbering of the drawings, the same symbols as in IEC 60364-7-707-84. Requirements of the standard complement, modify or supersede the requirements of other private standards set state standards for electrical installations of buildings. The absence of references to the chapter, section or paragraph of the private standard means that the relevant requirements of the standard apply to this case. 1 Scope This standard applies to electrical installations of buildings used in all sectors of the economy, regardless of their affiliation and ownership, and establishes requirements for special installations, in particular to ground electrical containing information processing equipment. It is intended to design, installation, commissioning and maintenance organizations of all forms of ownership and professionals to develop, test and operating in the above-mentioned electrical grounding devices, including electrically independent grounding, the device adjustment and leveling of electric potentials (UVEP), including Local UVEP, security system low voltage (BSNN), isolation transformers, designed for the electrical separation of the electrical supply networks and other requirements that complement the IEC 364-7-707-84 and reflect the needs of the economy, in italics. The requirements of this standard are mandatory. 2 Normative references in this standard references to the following standards: GOST 7396.1-89 (IEC 83-75), electrical plug connectors for household and similar purposes. Basic dimensions GOST 30326-95 (IEC 950-86) / GOST R 50377-92 (IEC 950-86) Safety of information technology equipment, including electrical office equipment 30331.2-95 Standard (IEC 364-3-93) / GOST 50571.2- 94 (IEC 364-3-93) Electrical installations of buildings. Part 3. Key features Standard 30331.3-95 (IEC 364-4-41-92) / GOST 50571.3-94 (IEC 364-4-41-92) Electrical installations of buildings. Part 4. Security requirements. Protection against electric shock 30331.4-95 Standard (IEC 364-4-42-80) / GOST 50571.4-94 (IEC 364-4-42-80) Electrical installations of buildings. Part 4. Security requirements. Protection against thermal effects GOST 50571.10-96 (IEC 364-5-54-80) Electrical installations of buildings. Part 5. Selection and installation of electrical equipment. Chapter 54. Earthing and protective conductors GOST 50571.14-96 (IEC 364-7-705-84) Electrical installations of buildings. Part 7. Requirements for special installations. Section 705. Electrical installations of agricultural and livestock premises GOST 51323.1-99 (IEC 60309-1-99) Plugs, sockets and connectors for industrial applications. Part 1. General Requirements 3 (707.2) The definitions in this standard, the following terms and definitions: 3.1 information processing equipment: Units of electrical or electronic equipment, which individually or in the system configuration (network) to collect, process and store data. Input and output data can be carried out if necessary with the help of electronic equipment. 03/02 ground without interference: Compound with an earthing device (including electrically independent), in which the noise is coming from external sources does not lead to unacceptable violations of equipment or data processing equipment to which it is connected. Note-Sensitivity of amplitude-frequency characteristics varies depending on the type of equipment. 3.3 significant leakage current: The earth leakage current exceeding the preset values ??in accordance with GOST R 30326/GOST 50,377 for equipment handling information received electricity through the plug connector (male, female), corresponding to the requirements of GOST 7396.1. 3.4 Land (relative, reference): conductive and which is outside the zone of influence of any earthing of the earth's crust, the electric potential is assumed to be zero. 3.5 Local land: Part of the land, which is in contact with the grounding, the electric potential is influenced by current flowing from the earthing may be different from zero. In cases where the difference from zero potential of the land does not matter, instead of the term "local land" use the generic term "ground". 3.6 to 1 kV electrical installation: electrical, rated voltage not exceeding 1 kV. 3.7 conductive parts: Part ability to conduct electrical current. 3.8 exposed conductive parts: Affordable touch-conductive part. 03.09 sided conductive parts: conductive part that is not part of the installation. 3.10 conducting dangerous part: the conducting part, including the current-carrying, touching which may under certain circumstances cause an electric shock. 11.3 conductor: Part is designed to conduct electrical current a certain value. 03.12 live parts: Explorer or conductive parts designed to work under stress in normal operating mode of the installation. 3.13 grounding: Intentional electrical connection to a given point of the system or plant, or equipment to the local earth through the grounding device. 3.14 Functional grounding: Grounding for the normal functioning of the apparatus, the shell is at the request of the developer should not attend even the smallest electric potential (sometimes this requires the existence of a separate electrically independent earthing). 3.15 earthing device: A group of earthing and grounding conductors. 3.16 Earthing: Part of the grounding device, consisting of one or more electrically interconnected grounding electrodes. 3.17 electrically independent earthing (independent earthing): Grounding, located at a distance from other earthing that currents spreading from them have no significant effect on the electrical potential of the independent earthing. 3.18 grounding conductor: The conductor that connects the grounding point of the system or plant, or equipment grounding. 3.19 Functional grounding conductor (FE-conductor): The grounding conductor in electrical up to 1 kV, an employee for functional earthing. 3.20 grounding electrode (earthing electrode): A conductive part which is in electrical contact with the local land, either directly or through an intermediate conductive medium, such as through a layer of concrete or conductive corrosion-resistant coating. 3.21 potentsialovyravnivayuschy electrode: Same as the ground electrode, but used to equalize electrical potential. 3.22 equalizing electrical potential: The electrical connection of conductive parts with each other to achieve their equipotential. 3.23 protective equalizing electrical potentials: Equalizing the electric potentials in order to ensure electrical safety through the elimination of electrical potential difference between all simultaneously accessible exposed conductive parts of the touch of a stationary electrical equipment and third-party conductive parts, including metal parts of the building constructions, achieved a reliable connection of these parts with one another through conductors. 3.24 main earthing bus (the main earth terminal): Bus or clip, which is part of the electrical grounding device of up to 1 kW and is designed for multi-conductor electrical connection to earth. 3.25 grounding system (grounding system): The sum of the substation grounding devices, exposed conductive parts of the consumer and the neutral conductor in electrical systems up to 1 kV. 3.26 Type of ground: The indicator on the ratio of neutral to ground the transformer in the substation and the exposed conductive parts of the consumer and device neutral conductor. Designation of types of earthing systems - according to GOST R 50571.2 30331.2/GOST. Distinguish TN, TT and IT-system, the first two of which are grounded at the transformer substation, and the third - in isolation. TN-system on the device neutral conductor, in turn, is divided into TN-S-, TN-C-and TN-CS-system. 3.27 neutral: Intentional electrical connection to a neutral conducting part (neutral conductor) in electrical systems up to 1 kV grounded neutral transformer at the substation. 3.28 neutral conductor (N-conductor): The conductor in electrical systems up to 1 kV, intended for single-phase power and power consumers connected to the grounded transformer at the substation. 3.29 Electrical safety division chains: Branch circuits from each other by separating the transformer windings which are separated by a core, an additional one or reinforced insulation. 3.30 protective conductor (PE-conductor): The conductor in electrical systems up to 1 kV, intended for security purposes, connecting the exposed conductive parts of the consumer with a grounding device. 3.31 combined zero-worker and the protective conductor (PEN-conductor): The conductor in electrical systems up to 1 kV, which combines the functions of a zero-worker and protective conductors. 3.32 Extra Low Voltage (CNS): The voltage does not exceed values ??at which it is not dangerous to humans in areas with high-risk, high-risk and in outdoor settings. 3.33 system safe low voltage (system BSNN): The electrical system in electrical installations up to 1 kV, in which the voltage does not exceed the values ??of the CNS: - In normal operation, electrical, and - in the first insulation damage, including earth fault in other circuits. 3.34 The containment system of low voltage (system ZSNN): The electrical system in electrical systems up to 1 kV where the voltage does not exceed the values ??of the CNS: - In normal operation, electrical, and - in the first insulation fault, except for a ground fault in other circuits. 3.35 the system of functional extra-low voltage (system FSNN): The electrical system in electrical installations up to 1 kV, in which the voltage does not exceed the values ??of the CNS from considerations of its normal operation (the operation) and which can be used to protect against electric shock under certain conditions. 707 Ground Electrical containing information processing equipment 707.1 General requirements of this standard apply to information processing equipment in cases where: - the equipment is connected to the mains via plug connections GOST 7396.1, and is characterized by the leakage current in excess of the values ??set in the Standard 30326/GOST P 50,377 - equipment complies with current leakage requirements of GOST 30326/GOST P 50377. The requirements of this standard applies to electrical parts of buildings, from the point of connection equipment, counting on a course of movement of energy (the boundary between the electric facilities of the building and the equipment shown in Figure A.1 of Appendix A). These requirements apply to other installations or locations to which the equipment is connected with considerable leakage currents (eg industrial process control equipment, communications equipment, etc.) The requirements of this standard applies to electrical installations in agricultural production, in which the operating conditions of electrical equipment in the majority of significantly more complicated than in industry. This is due to increased humidity, the presence of corrosive vapors and gases that cause the one hand, the premature failure of electrical insulation of live parts of electrical equipment and wiring, with another - reducing the electrical resistance contact between standing on the damp floor man and land. In animal houses, along with the need to ensure the electrical safety of people required to take measures and to ensure the electrical safety of farm animals, which compared with a person more sensitive to electrical current. In addition, animals exposed to the so-called elektropatologii, which includes loss of productivity (a decrease in milk yield in dairy cows, reducing the gains from being fattening animals) under the influence of an electric voltage of small values. All this must be considered when choosing methods of protection, especially for electrical installations, containing information processing equipment, included in the automated process control system (automated line of forage, manure, processing and packaging of milk, etc.). Premature failure of isolation in such systems leads to significant leakage currents and requires special measures, which are formulated in this standard and GOST 50571.14. 707.4 707.471.3 Additional security requirements to protect people from electric shock for the equipment with a significant leakage current 707.471.3.1 requirements of this paragraph shall apply when equipment is a significant leakage current is connected to the electrical installation in all types of grounding systems. These requirements apply to electrical installation shown in Figure A.1. Additional requirements for TT earthing systems and IT in paragraphs 707.471.4 and 707.471.5. Notes 1 The electrical TN-C, in which zero workers and protective conductors to terminal equipment together in one common conductor (PEN-conductor), leakage current can be considered as the load current. 2 Equipment with large leakage currents may be incompatible with electric facilities, protected by a residual current devices off. In this case, you should consider the total leakage current due to leakage current equipment and discharge currents of capacitors, which can cause false positives UST. 707.471.3.2 information processing equipment must meet the requirements of GOST 30326/GOST P 50,377, to be stationary, connected with stationary Electrical installations of buildings either permanently or through electrical connectors for industrial use according to GOST R 51323.1. Electrical connectors in accordance with GOST 7396.1 should not apply. Note-For equipment with significant leakage currents it is important to check the integrity of the circuit ground, as indicated in the GOST R 50571.10: - during the commissioning of electrical installations - after any changes to the installation. It is recommended to periodically check the integrity of the circuit ground. 707.471.3.3 Additional requirements for information processing equipment with leakage currents greater than 10 mA If the leakage current, measured according to GOST R 50337 is greater than 10 mA, the equipment necessary to connect to the electrical installation in accordance with one of three options listed in paragraphs 707.471.3.3.1 - 707.471.3.3.3. Note-When measuring leakage current according to GOST R 50337 account for all damage that may not be detected in the equipment. The measurement results should be reflected in the records. 707.471.3.3.1 protection circuit reliability protective conductors should have the greatest cross section in accordance with section 543 of GOST R 50571.10 or meet one of the following requirements: a) have a cross section of not less than 10 mm2 in the case of one independent protective conductor or not less than 4 mm 2 each in the case of two conductors with independent connections of equipment. Note: Wire-section of 10 mm2 or more may be made of aluminum; b) the sum of all sections of the wires should be no less than 10 mm2, if the protective conductors with the power supply wires are part of a single cable with stranded conductors; c) have a section for at least 2 and 5 mm2, when protective conductors connected in parallel with a metal pipe, rigid or flexible according to IEC 614-2-1 [1], providing continuity of the current circuit; d) be composed of metal pipes, rigid and flexible metal ducts and conduits for concealed wiring, screens and metal armor cables that meet the requirements of paragraph 543.2.1 GOST R 50571.10. Any of the above listed agents must meet other requirements of section 543 GOST R 50571.10. 707.471.3.3.2 control over the integrity of chains Ground NOTE-The purpose of these requirements is to ensure the integrity of the grounding connections and the availability of automatic disconnection of supply in case of rupture of chains Ground. In electrical systems should be provided for one or more security devices, disconnecting power supply information processing equipment, if there is a rupture of the protective circuit in accordance with the requirements of paragraph 413.1 30331.3/GOST GOST R 50571.3. Grounding conductor shall meet the requirements of section 543 GOST R 50571.10. 707.471.3.3.3 Use double winding isolating transformer NOTE-The purpose of this requirement - a way to limit the leakage current and minimize the risk of rupture of the path. If the information processing equipment is powered via two-winding isolation transformer or from sources with an equivalent division into primary and secondary circuit as the motor-generator unit, the secondary circuit should preferably be performed with the system grounding TN, but the IT earthing system can be applied to specific circumstances. Grounding equipment and transformers shall conform to 707.471.3.3.1 or 707.471.3.3.2. 707.471.4 Additional requirements for grounding systems TT 707.471.4.1 In cases where the circuit with information processing equipment is protected by residual current device residual current, complete leakage current I1 (in amperes), the resistance of the grounding device earthed exposed conductive parts of the RA (in ohms) and the nominal differential current protection device IDn (in amperes) must satisfy the following agreement 707.471.4.2 If the requirement of 707.471.4.1 can not be done, it should apply the requirement of paragraph 707.471.3.3.3. 707.471.5 Additional requirements for the grounding system IT 707.471.5.1 is desirable that the information processing equipment with significant leakage currents are not connected directly to the grounding system due to IT difficulties in meeting the requirements for the touch voltage after the first injury. To the extent possible, the equipment must be powered from the mains to the grounding system TN, plugged in to the grounding system through the two-winding transformer IT. If there is an opportunity to comply with the conditions in section 413.1.5.3 30331.3/GOST GOST R 50571.3, the equipment can directly join the grounding system of IT. This can be facilitated direct connection of all protective earthing conductors with grounding power source. 707.471.5.2 If you use direct connect information processing equipment to the network to the grounding system IT must ensure that the equipment is prepared for accession to the grounding system according to the instruction IT developer equipment. 707.5 The selection and installation of electrical 707.545.2 security requirements for equipment grounding without interference NOTE-level leakage currents existing in the electrical grounding device of buildings may be considered unacceptable because of possible failures of information processing equipment, which it is joined. 707.545.2.1 exposed conductive parts of data processing equipment must be connected to the main earthing clamp installation. Note-Item 413.1 30331.3/GOST GOST P 50571.3 prohibits the use of different earthing for both grounded parts. Grounding wires are used only for operational reasons, not necessarily conform to the requirements of section 543 GOST R 50571.10. 707.545.2.2 Other special methods in exceptional cases where the safety requirements of paragraph 707.545.2.1 met this standard, but the level of leakage current in the main earth terminal installation can not be reduced to an acceptable level, electrical installation is considered as a special case. Location of earthing should provide a level of protection provided by this standard. They should also: - provide satisfactory protection against overcurrent, - to exclude the appearance of undue stresses touching on the equipment and ensure equipotentiality between equipment elements adjacent conductors and other electrical equipment under normal conditions and conditions of insulation damage - comply with the requirements relating to possible excessive current leakage, and contribute ctekaniyu these currents. ANNEX A (informative) Installation Information Processing Note - Attached equipment is powered from the main Figure A.1 - The boundaries between the electrical installation and equipment of information processing Notes 1 protection devices and switching in a circuit-separation transformer not shown 2 C - Interference Capacitor Figure A .2 - How to join information processing equipment through an isolation transformer ANNEX B (informative) Examples of information processing equipment, which is included in the scope of the standard equipment for data processing and text, personal computers, displays, equipment for data preparation, user locations, equipment end channel data, printers, calculators, calculating accounting machines, cash registers, terminals, retail outlets, the reader, and punch card printing, shtempeliruyuschie machines, copiers, duplicating machines, devices, erasing device for sharpening pencils, and machines for processing postal items, machinery for document destruction shredding, processing unit of magnetic tapes, hard drives with electrical, voice recorders, Micrographic office equipment, machines for banknotes, electrical drafting machines (plotters), and machines for processing paper (drill presses, cut-off machines, separators), machinery for the paper, postage machine and teleprinters. The equipment list is not exhaustive, and equipment not listed in the list can also be attributed to the dissemination of this standard. Equipment that meets the requirements of this standard can be used in automated systems, process control, automated test systems and other similar systems, based on the use of equipment for information processing. ANNEX C (informative) Bibliography [1] IEC 614-2-1-82 Pipelines (conduit) for electric installations. Part 2. Particular requirements for electrical wiring in the pipes. Section 1. Metal pipelines Keywords: electrical buildings electrical installations up to 1 kV, security, surge protection, grounding, equalizing electrical potentials, the alignment of the electric potentials, information technology equipment, information processing equipment, electrical division of Network Contents Foreword 1 Scope 2 Normative references 3 (707.2) Definitions Electrical Grounding 707 containing information processing equipment 707.1 General provisions 707.4 707.5 Security Requirements Selection and installation of electrical Appendix A Hardware Installation Information Processing Annex B Examples of information processing equipment, which is included in the scope of this standard, Annex C Bibliography of Published 19/07/2008 Standards on the topic "Electrical, lighting, security systems," GOST 15597-82 Fixtures for industrial buildings. General specifications GOST 2.702-75 Unified system for design documentation. Rules for making electronic circuits with GOST 2.752-71 Unified system for design documentation. Graphical symbols in diagrams. Robot device GOST 2.755-87 Unified system for design documentation. Graphical symbols in electrical circuits. Device switching and contact connections GOST 2.756-76 * Unified system for design documentation. Graphical symbols in diagrams. Is often perceived electromechanical devices GOST 2.757-81 * Unified system for design documentation. Graphical symbols in diagrams. Elements of the switching field for switching systems GOST 2.758-81 Unified system for design documentation. Graphical symbols in diagrams. Signal Technology GOST 2.762-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Frequencies and frequency bands for transmission systems GOST 2.763-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Device with a pulse-code modulation GOST 2.764-86 Unified system for design documentation. Graphical symbols in electrical circuits. Integrated optoelectronic display elements GOST 2.768-90 Unified system for design documentation. Graphical symbols in diagrams.
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