GOST 50571.14-96 (IEC 364-7-705-84) UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electrical installations of buildings Part 7 Requirements for special installations SECTION 705 ELECTRICAL agricultural and livestock PREMISES Electrical installations of buildings. Part 7. Requirements for special installations or locations. Section 705. Electrical installations of agricultural and stock-breeding buildings ACS 27,020, 29,020 OKS 3402 Effective date 1/7/1997 Preface 1 prepared and submitted to the Technical Committee for Standardization TC 337 Electrical equipment of residential and public buildings 2 adopted and put into operation the Decree of 24 Russian State Standard December 1996 № 683 3 This standard is an authentic text of the international standard IEC 364-7-705 (1984) "Electrical installations of buildings. Part 7. Requirements for special installations. Section 705. Electrical installations of agricultural and livestock facilities, except for items 705.413.1, 705.413.1.6 and Annex A, which sets out the requirements reflect the needs of the economy four first introduced INTRODUCTION This standard is part of the state standards for electrical installations of buildings, developed by the International Standards International Electrotechnical Commission IEC 364 "Electrical installations of buildings." Numbering sections and paragraphs in standard corresponds to the numbering adopted in IEC 364-7-705 (1984). 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 corresponding general requirements apply to this case. Established in this standard include requirements to ensure electrical safety of people and farm animals (cattle, horses, pigs, sheep), as well as to prevent fires caused by violation (failure) of insulation of live parts. Livestock facilities have several features that require extremely reliable technical elektrozaschitnyh events. These features include the environmental conditions (humidity, dust, corrosive fumes and gases) and the presence of farm animals, which compared with a person more sensitive to the electric voltage and which must be protected not only from a possible elektroporazheniya, but also from elektropatologii, ie from reduced productivity under the influence of a safe and life is quite low contact voltage (for example, the impact of stress on the cows only 3 leads to a decrease in milk yield by 30% or more). Reliable electrical safety of people and farm animals is provided, in accordance with the requirements of this standard, the use of protective devices (RCD), equalizing the electrical potential according to GOST R 50571.3, and for large livestock facilities (with the number of cattle more than 200 in one structure) saturated electrical equipment and metal structures, the use of RCD bonding in accordance with GOST 50571.3 in conjunction with the alignment of the electric potential between the steel structure and floor. It should be noted that the RCD in addition to electrical safety and provide protection against fires, with the possible failure isolation of live parts and the appearance of a leakage current of the order of 0.3 A and more. Conducted by the All-Russian Research Institute for Electrification of Agriculture (VIESH) Long-term studies have shown a particularly high efficiency of protection of farm animals from dangerous and harmful effects of electric current by equalizing the electrical potential and the alignment of the electric potential between the stalls floor and metal. Based on these studies was developed and in 1985 enacted the industry standard OCT 46 18085 "Protection of farm animals from shock. Alignment of the electric potentials. General technical requirements, compliance with the requirements of which the large-scale livestock farms provided sufficient electrical farm animals. It is mandatory Appendix A to this standard are summarized the relevant requirements of the GRL 46 180-85 to ensure the protection of farm animals with equalization of electric potential and grounding in animal houses. It should be borne in mind that the requirements of Annex A relate to animal houses (with the number of cattle at least 200 in the same room) with concrete floors covered with wood or other flooring, with or without the deck, with zamonolichennymi the floor with metal rack system avtopoeniya and milking, having navozouborochnye transporters and other electrified arrangements that increase the likelihood of electrical shock and elektropatologii of farm animals. On the premises with the number of cattle less than 200, as well as poultry premises requirements of Annex A do not apply. The requirements of this standard, reflecting the needs of the country's economy and complement the IEC 364-7-705-84 generalize the results of domestic research and experience of protection against electric shock, farm animals by equalizing electrical potentials, achieved both through the use of special devices, the alignment of electric potentials (UVEP ) and due to the natural alignment of potentials are in contact with the ground metal constructions, conductive parts of technological equipment, communications and industrial buildings for other purposes. 1 Scope This standard applies to all parts of fixed electrical installations of agricultural and livestock buildings (barns, Telyatnikov, piggeries, shepherd, stables, biofactories), poultry premises, and buildings such as barns, in which there are farm animals (cattle, horses, pigs, sheep), storage for hay, straw, animal feed, as well as all kinds of kormotsehov and establishes special requirements for electrical safety of people and livestock, fire protection and fire, selection and use of electrical equipment. Standard requirements are mandatory. Requirements to complement the IEC 364-7-705-84 and reflect the needs of the economy, in italics. 2 Normative references in this standard references to the following standards: GOST 27.002-89 reliability of the technique. Basic concepts. Terms and definitions GOST 14254-96 Degrees of protection provided by enclosures (code IP) GOST 50571.1-93 Electrical installations of buildings. Key provisions of GOST 50571.2-94 (IEC 364-3-93) Electrical installations of buildings. Part 3. The main characteristics of GOST 50571.3-94 (IEC 364-4-41-92) Electrical installations of buildings. Part 4. Security requirements. Protection against electric shock, GOST 50571.4-94 (IEC 364-4-42-80) Electrical installations of buildings. Part 4. Security requirements. Protection against thermal effects of Section 705 ELECTRICAL agricultural and livestock PREMISES 705.41 Protection against electric shock and 705.411.1.4.3 705.411.1.5.2 If a system or BSNN ZSNN (GOST R 50571.3), then, regardless of the rated voltage, should ensure protection against direct (immediate) contact: - fencing or shells with a degree of protection of at least IR2H, or - isolation test voltage 500 V AC (rms) for 1 min. 705.412.5 Chain outlets should be protected by a protective device (RCD), responsive to differential current, with rated current response (setpoint for differential current) not more than 30 mA. Note - If you enter the room (see 705.422) on setting RCD residual current does not exceed 30 mA, an additional protection circuit sockets are required. 705.413.1 Auto power off to the emergency mode in case of electrical indirect contact people, animals and the potential difference (voltage) U between the exposed conductive parts and the floor in areas where there may be people and placed the animals should not exceed specified in Table 1 values, which depend the duration of the possible impact of (full-time protection is activated). In the area of ??placing the animals maximum allowable voltage U AC in normal mode to avoid elektropatologii should not exceed 0.2 V. Note - The emergency operation is called the electrical installations, came into the inoperable condition in which the voltage U between the exposed conductive parts and the ground exceeds the values listed in Table 1. Inoperable - the state of electrical installations in which the value of at least one parameter characterizing the ability to perform specified functions, does not comply with regulatory and (or) design (design) documentation (GOST 27.002). 705.413.1.6 Adjustment and alignment capabilities in large-scale livestock facilities (with the number of cattle at least 200 in the same structure) with concrete floors that have wood or other cover, or without, with zamonolichennymi a concrete floor racks, metal systems avtopoeniya and milking with navozouborochnye transporters and other electrified arrangements that increase the probability of occurrence of emergency conditions, should apply equalization capabilities in accordance with GOST R 50571.3, the alignment of electric potential * and the earth, made in accordance with the instructions contained in Appendix A. In other types of livestock housing need only install UST on entering the premises and meet the requirements of 705.413.1, which is recommended to use protective metal mesh embedded in the floor and connected to the protective conductor and all metal structures, which can touch the animals. ________ * Adjustment of electric potentials - elimination of electrical potential difference between all simultaneously accessible exposed conductive parts of the touch of a stationary electrical equipment and external conductive parts, including metal parts of the building constructions, achieved the combination of these parts to each other with wires. Alignment of the electric potentials - reducing the relative difference in electrical potential between the grounding device, exposed conductive parts of the ground (or other electrically conductive substrate) in normal and emergency modes of operation, achieved a compound of the grounding device and the exposed conductive parts stacked in the ground (on the ground or on the surface of another electrically conductive substrate) electrodes. Table 1: Time of the possible impact of touch voltage, with the highest allowable touch voltage, V 0.2 150 0.5 100 1.0 75 5.0 35 10.0 25 St. 10 Not more than 12 705.42 Protection against thermal effects (see Standard P 50571.4) 705.422 Fire protection to avoid the risk of fire should be set to enter the premises of UST with set of differential current does not exceed 300 mA. Electric heaters in the rooms for the animals, processing and storage of feed should be set at an appropriate distance from the animals and combustible materials in order to avoid burn animals and fire. In the case of reflectors, clearance should be not less than 0,5 m if the operating instructions of the manufacturer does not stipulate a greater distance. Note - When the installation sequence of two or more RCD (for example, on entering the room, and then chained outlets), they should form a selective system with a detuning on the response time. 705,482 Fire Protection Notes 1 is necessary to consider the possibility of withdrawal of animals in the event of a fire outside of buildings in a safe place. 2 The fire buildings should comply with the requirements of subsection 482.2. 3 To ensure the fire safety requirements must be met Regulations for Electrical (SEP) approved Glavtehupravleniem and Gosenergonadzor USSR Ministry of Energy and Safety Regulations in the operation of electrical consumers (PTB), approved Glavgosenergonadzorom 21/12/1984, to ensure compliance with electrical GOST 50571.1, GOST R 50571.2 on fire safety requirements. 705.5 Selection and installation of 705,512 of protection of electrical equipment according to GOST 14254 must be at least IP35. 705.53 launch protection apparatus 705.532.2 * Note - It is recommended to protect the distribution network by UST with set of differential current to 30 mA. Setpoint should be the minimum possible, but do not result in nuisance tripping. 705,537 disconnect device and device control emergency shutdown, including the emergency stop device shall be located in places not accessible to animals, taking into account the situations that may arise as a result of fear of animals. 705.55 Other equipment * Notes 1 In cases where the vicinity of overhead power lines (VL) are Electrofences, then between them should choose a distance, eliminating inductive currents that may cause stress on the wires Electrofences whose values ??exceed the figures in table 1, as well as taking into account the possible fall of wires overhead. 2 In the case of large-scale livestock enterprises (with the number of cattle at least 200 in one structure) should take into account the requirements of GOST R 50571.2. __________ * Pending ANNEX A (normative) Alignment of electrical potentials and grounding in animal houses A.1 The protection of livestock against electric shock is necessary to provide the following emergency conditions: a single-phase earth fault in the network voltage to 1 kV, including break and fall to the ground phase wire overhead, 2 earth fault on the side of higher voltage substations 6 / 0, 4, 10 / 0,4 and 35 / 0,4, and 3 shorted to ground in the UL voltage 6, 10 and 35 kV, 4 single-phase short circuit on the body in the network voltage to 1 kV, 5 earth fault on the side of high voltage substations in-depth input voltage of 110 kV, 6 earth fault in the overhead line voltage of 110 kV in-depth input. A.2 animal protection against electric shock should be provided in such a way that specified in A.1 for the first three emergency modes of touch voltage and the voltage step for the animal did not exceed 12 V. For a 4 - to 6-second emergency operation, these stresses depend on the duration of the fault protection, ie of the total trip time equal to the sum of the response time the main relay protection and switching off the device and must not exceed the values ??shown in Table 1 of this standard. Duration of protection for the 4 th emergency operation must not exceed 0.4 sec. A.3 Provision of the requirements of A.1 and A.2 should be carried out by equalizing electrical potentials between the floor area, which are animals, and all available for a touch of animal metal structures (avtopoilkami, pipelines, structures conveyor for forage and manure , constructs fences boxes and other farmyard equipment, etc.) that may be under an electric potential. For this purpose, should be performed artificial device alignment of electrical potentials (UVEP) or use only the natural alignment of the electric potentials of technological and building structures. A.4 All public and third-party conductive parts, which the animals can touch, must be electrically interconnected with the valve construction of reinforced concrete structures livestock premises and with the protective conductor of electrical (zero in the protective earthing systems TN or TT system). These parts must be visible from the electrical connection with the vanishing of the lead body shield, with an introductory water pipe with reducers navozouborochnyh and feed-dispensing conveyor, made by welding flat steel with a minimum thickness of 4 mm or a wire rod with a diameter of at least 8 mm. Execute, monitor the working condition and repair these workers are obliged to respect the economy, the balance of which is livestock premises. A.5 Neutral IL on commissioning of livestock buildings should be re-ground, made by attaching to natural or artificial earth electrode formed by the construction and technological metal in contact with the ground. 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 50571.14-96 (IEC 364-7-705-84) UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electrical installations of buildings Part 7 Requirements for special installations SECTION 705 ELECTRICAL agricultural and livestock PREMISES Electrical installations of buildings. Part 7. Requirements for special installations or locations. Section 705. Electrical installations of agricultural and stock-breeding buildings ACS 27,020, 29,020 OKS 3402 Effective date 1/7/1997 Preface 1 prepared and submitted to the Technical Committee for Standardization TC 337 Electrical equipment of residential and public buildings 2 adopted and put into operation the Decree of 24 Russian State Standard December 1996 № 683 3 This standard is an authentic text of the international standard IEC 364-7-705 (1984) "Electrical installations of buildings. Part 7. Requirements for special installations. Section 705. Electrical installations of agricultural and livestock facilities, except for items 705.413.1, 705.413.1.6 and Annex A, which sets out the requirements reflect the needs of the economy four first introduced INTRODUCTION This standard is part of the state standards for electrical installations of buildings, developed by the International Standards International Electrotechnical Commission IEC 364 "Electrical installations of buildings." Numbering sections and paragraphs in standard corresponds to the numbering adopted in IEC 364-7-705 (1984). 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 corresponding general requirements apply to this case. Established in this standard include requirements to ensure electrical safety of people and farm animals (cattle, horses, pigs, sheep), as well as to prevent fires caused by violation (failure) of insulation of live parts. Livestock facilities have several features that require extremely reliable technical elektrozaschitnyh events. These features include the environmental conditions (humidity, dust, corrosive fumes and gases) and the presence of farm animals, which compared with a person more sensitive to the electric voltage and which must be protected not only from a possible elektroporazheniya, but also from elektropatologii, ie from reduced productivity under the influence of a safe and life is quite low contact voltage (for example, the impact of stress on the cows only 3 leads to a decrease in milk yield by 30% or more). Reliable electrical safety of people and farm animals is provided, in accordance with the requirements of this standard, the use of protective devices (RCD), equalizing the electrical potential according to GOST R 50571.3, and for large livestock facilities (with the number of cattle more than 200 in one structure) saturated electrical equipment and metal structures, the use of RCD bonding in accordance with GOST 50571.3 in conjunction with the alignment of the electric potential between the steel structure and floor. It should be noted that the RCD in addition to electrical safety and provide protection against fires, with the possible failure isolation of live parts and the appearance of a leakage current of the order of 0.3 A and more. Conducted by the All-Russian Research Institute for Electrification of Agriculture (VIESH) Long-term studies have shown a particularly high efficiency of protection of farm animals from dangerous and harmful effects of electric current by equalizing the electrical potential and the alignment of the electric potential between the stalls floor and metal. Based on these studies was developed and in 1985 enacted the industry standard OCT 46 18085 "Protection of farm animals from shock. Alignment of the electric potentials. General technical requirements, compliance with the requirements of which the large-scale livestock farms provided sufficient electrical farm animals. It is mandatory Appendix A to this standard are summarized the relevant requirements of the GRL 46 180-85 to ensure the protection of farm animals with equalization of electric potential and grounding in animal houses. It should be borne in mind that the requirements of Annex A relate to animal houses (with the number of cattle at least 200 in the same room) with concrete floors covered with wood or other flooring, with or without the deck, with zamonolichennymi the floor with metal rack system avtopoeniya and milking, having navozouborochnye transporters and other electrified arrangements that increase the likelihood of electrical shock and elektropatologii of farm animals. On the premises with the number of cattle less than 200, as well as poultry premises requirements of Annex A do not apply. The requirements of this standard, reflecting the needs of the country's economy and complement the IEC 364-7-705-84 generalize the results of domestic research and experience of protection against electric shock, farm animals by equalizing electrical potentials, achieved both through the use of special devices, the alignment of electric potentials (UVEP ) and due to the natural alignment of potentials are in contact with the ground metal constructions, conductive parts of technological equipment, communications and industrial buildings for other purposes. 1 Scope This standard applies to all parts of fixed electrical installations of agricultural and livestock buildings (barns, Telyatnikov, piggeries, shepherd, stables, biofactories), poultry premises, and buildings such as barns, in which there are farm animals (cattle, horses, pigs, sheep), storage for hay, straw, animal feed, as well as all kinds of kormotsehov and establishes special requirements for electrical safety of people and livestock, fire protection and fire, selection and use of electrical equipment. Standard requirements are mandatory. Requirements to complement the IEC 364-7-705-84 and reflect the needs of the economy, in italics. 2 Normative references in this standard references to the following standards: GOST 27.002-89 reliability of the technique. Basic concepts. Terms and definitions GOST 14254-96 Degrees of protection provided by enclosures (code IP) GOST 50571.1-93 Electrical installations of buildings. Key provisions of GOST 50571.2-94 (IEC 364-3-93) Electrical installations of buildings. Part 3. The main characteristics of GOST 50571.3-94 (IEC 364-4-41-92) Electrical installations of buildings. Part 4. Security requirements. Protection against electric shock, GOST 50571.4-94 (IEC 364-4-42-80) Electrical installations of buildings. Part 4. Security requirements. Protection against thermal effects of Section 705 ELECTRICAL agricultural and livestock PREMISES 705.41 Protection against electric shock and 705.411.1.4.3 705.411.1.5.2 If a system or BSNN ZSNN (GOST R 50571.3), then, regardless of the rated voltage, should ensure protection against direct (immediate) contact: - fencing or shells with a degree of protection of at least IR2H, or - isolation test voltage 500 V AC (rms) for 1 min. 705.412.5 Chain outlets should be protected by a protective device (RCD), responsive to differential current, with rated current response (setpoint for differential current) not more than 30 mA. Note - If you enter the room (see 705.422) on setting RCD residual current does not exceed 30 mA, an additional protection circuit sockets are required. 705.413.1 Auto power off to the emergency mode in case of electrical indirect contact people, animals and the potential difference (voltage) U between the exposed conductive parts and the floor in areas where there may be people and placed the animals should not exceed specified in Table 1 values, which depend the duration of the possible impact of (full-time protection is activated). In the area of ??placing the animals maximum allowable voltage U AC in normal mode to avoid elektropatologii should not exceed 0.2 V. Note - The emergency operation is called the electrical installations, came into the inoperable condition in which the voltage U between the exposed conductive parts and the ground exceeds the values listed in Table 1. Inoperable - the state of electrical installations in which the value of at least one parameter characterizing the ability to perform specified functions, does not comply with regulatory and (or) design (design) documentation (GOST 27.002). 705.413.1.6 Adjustment and alignment capabilities in large-scale livestock facilities (with the number of cattle at least 200 in the same structure) with concrete floors that have wood or other cover, or without, with zamonolichennymi a concrete floor racks, metal systems avtopoeniya and milking with navozouborochnye transporters and other electrified arrangements that increase the probability of occurrence of emergency conditions, should apply equalization capabilities in accordance with GOST R 50571.3, the alignment of electric potential * and the earth, made in accordance with the instructions contained in Appendix A. In other types of livestock housing need only install UST on entering the premises and meet the requirements of 705.413.1, which is recommended to use protective metal mesh embedded in the floor and connected to the protective conductor and all metal structures, which can touch the animals. ________ * Adjustment of electric potentials - elimination of electrical potential difference between all simultaneously accessible exposed conductive parts of the touch of a stationary electrical equipment and external conductive parts, including metal parts of the building constructions, achieved the combination of these parts to each other with wires. Alignment of the electric potentials - reducing the relative difference in electrical potential between the grounding device, exposed conductive parts of the ground (or other electrically conductive substrate) in normal and emergency modes of operation, achieved a compound of the grounding device and the exposed conductive parts stacked in the ground (on the ground or on the surface of another electrically conductive substrate) electrodes. Table 1: Time of the possible impact of touch voltage, with the highest allowable touch voltage, V 0.2 150 0.5 100 1.0 75 5.0 35 10.0 25 St. 10 Not more than 12 705.42 Protection against thermal effects (see Standard P 50571.4) 705.422 Fire protection to avoid the risk of fire should be set to enter the premises of UST with set of differential current does not exceed 300 mA. Electric heaters in the rooms for the animals, processing and storage of feed should be set at an appropriate distance from the animals and combustible materials in order to avoid burn animals and fire. In the case of reflectors, clearance should be not less than 0,5 m if the operating instructions of the manufacturer does not stipulate a greater distance. Note - When the installation sequence of two or more RCD (for example, on entering the room, and then chained outlets), they should form a selective system with a detuning on the response time. 705,482 Fire Protection Notes 1 is necessary to consider the possibility of withdrawal of animals in the event of a fire outside of buildings in a safe place. 2 The fire buildings should comply with the requirements of subsection 482.2. 3 To ensure the fire safety requirements must be met Regulations for Electrical (SEP) approved Glavtehupravleniem and Gosenergonadzor USSR Ministry of Energy and Safety Regulations in the operation of electrical consumers (PTB), approved Glavgosenergonadzorom 21/12/1984, to ensure compliance with electrical GOST 50571.1, GOST R 50571.2 on fire safety requirements. 705.5 Selection and installation of 705,512 of protection of electrical equipment according to GOST 14254 must be at least IP35. 705.53 launch protection apparatus 705.532.2 * Note - It is recommended to protect the distribution network by UST with set of differential current to 30 mA. Setpoint should be the minimum possible, but do not result in nuisance tripping. 705,537 disconnect device and device control emergency shutdown, including the emergency stop device shall be located in places not accessible to animals, taking into account the situations that may arise as a result of fear of animals. 705.55 Other equipment * Notes 1 In cases where the vicinity of overhead power lines (VL) are Electrofences, then between them should choose a distance, eliminating inductive currents that may cause stress on the wires Electrofences whose values ??exceed the figures in table 1, as well as taking into account the possible fall of wires overhead. 2 In the case of large-scale livestock enterprises (with the number of cattle at least 200 in one structure) should take into account the requirements of GOST R 50571.2. __________ * Pending ANNEX A (normative) Alignment of electrical potentials and grounding in animal houses A.1 The protection of livestock against electric shock is necessary to provide the following emergency conditions: a single-phase earth fault in the network voltage to 1 kV, including break and fall to the ground phase wire overhead, 2 earth fault on the side of higher voltage substations 6 / 0, 4, 10 / 0,4 and 35 / 0,4, and 3 shorted to ground in the UL voltage 6, 10 and 35 kV, 4 single-phase short circuit on the body in the network voltage to 1 kV, 5 earth fault on the side of high voltage substations in-depth input voltage of 110 kV, 6 earth fault in the overhead line voltage of 110 kV in-depth input. A.2 animal protection against electric shock should be provided in such a way that specified in A.1 for the first three emergency modes of touch voltage and the voltage step for the animal did not exceed 12 V. For a 4 - to 6-second emergency operation, these stresses depend on the duration of the fault protection, ie of the total trip time equal to the sum of the response time the main relay protection and switching off the device and must not exceed the values ??shown in Table 1 of this standard. Duration of protection for the 4 th emergency operation must not exceed 0.4 sec. A.3 Provision of the requirements of A.1 and A.2 should be carried out by equalizing electrical potentials between the floor area, which are animals, and all available for a touch of animal metal structures (avtopoilkami, pipelines, structures conveyor for forage and manure , constructs fences boxes and other farmyard equipment, etc.) that may be under an electric potential. For this purpose, should be performed artificial device alignment of electrical potentials (UVEP) or use only the natural alignment of the electric potentials of technological and building structures. A.4 All public and third-party conductive parts, which the animals can touch, must be electrically interconnected with the valve construction of reinforced concrete structures livestock premises and with the protective conductor of electrical (zero in the protective earthing systems TN or TT system). These parts must be visible from the electrical connection with the vanishing of the lead body shield, with an introductory water pipe with reducers navozouborochnyh and feed-dispensing conveyor, made by welding flat steel with a minimum thickness of 4 mm or a wire rod with a diameter of at least 8 mm. Execute, monitor the working condition and repair these workers are obliged to respect the economy, the balance of which is livestock premises. A.5 Neutral IL on commissioning of livestock buildings should be re-ground, made by attaching to natural or artificial earth electrode formed by the construction and technological metal in contact with the ground. Said earthing should have a resistance at which the alignment of the electric potentials provides the required A.2 allowable stresses for all listed in A.1 emergency conditions and, moreover, this resistance must not exceed that allowed in RB, in view of the electrical resistivity of the earth in place placement of animal houses. A.6 At the design stage animal houses should consider using natural earth electrodes and the natural alignment of the electric potentials at the expense of building and technological metal and only if it results in calculations or experimental verification of the A8 is not enough, apply artificial grounding and UVEP. The criteria for assessing adequacy should serve to ensure the required A2 allowable stress for all of the A1 in emergency conditions. A. 7 Checking the adequacy of natural earthing for re-grounding of the neutral conductor overhead line and the adequacy of the natural alignment of the electric potentials of construction and technological metal is desirable to implement at the design stage and necessary after the completion of construction works, and then periodically, but at least once a year. A.8 Validation should be carried out based on a fixed vertical electric sounding (FVEZ) of land in areas of allocation of livestock buildings, and further analysis results FVEZ all listed in A.1 emergency regimes and their respective allowable stresses for the A2. Key words: electrical buildings, special electrical installations, agricultural premises, livestock facilities, farm animals, the equalization of potentials; equipotential, security, auto power off Posted 20/07/2008 GOST on "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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