Approvedand put into effect

Decree of the State Standard of the USSR

STATE STANDARD OF THE UNION OF THE SSR

SYSTEM OF WORK SAFETY STANDARDS

ELECTRICAL SAFETY

SAFETY DISTANCES

IN THE SECURITY ZONE OF POWER LINES

VOLTAGE ABOVE 1000 V

Occupational safety standards system.

electrical safety.

Distances of safety in the protective zone of power

transmissionlines for voltages above 1000 V

GOST 12.1.051-90

(ST SEV 6862-89)

Group T58

OKSTU 0012

Introduction date

INFORMATION DATA

1. Developed and introduced by the Ministry of Energy and Electrification of the USSR.

Developers: Z.I. Kobzeva (topic leader); L.D. Kotilevskaya.

2. Approved and put into effect by the Decree State Committee USSR on product quality management and standards dated 11/29/1990 N 2971.

3. Term of inspection - 2001, frequency of inspection - 10 years.

4. The standard fully complies with ST SEV 6862-89.

5. Introduced for the first time.

6. Reference normative and technical documents

──────────────────────────────────────────────┬───────────────────

──────────────────────────────────────────────┼───────────────────

GOST 12.1.019-79│1.1, 3.1

This standard applies to the security zones of power lines and establishes safety distances from current-carrying parts under voltage over 1000 V when performing work by persons who do not have electrical qualifications.

This International Standard does not specify safety distances from live parts for personnel working on electrical installations.

1. GENERAL PROVISIONS

1.1. Protection of persons from injury electric shock provided by the design of power lines, technical means and means, organizational and technical measures and control of electrical safety requirements in accordance with GOST 12.1.019.

1.2. Protection of persons from electric shock when performing work near live parts under voltage over 1000 V is ensured by the establishment of security zones, instructing workers about the danger of touching or approaching live parts and compliance established distances security.

2. SECURITY ZONES OF POWER LINES

2.1. Security zone along overhead lines power transmission is installed as an airspace above the ground, bounded by parallel vertical planes, spaced on both sides of the line at a distance from the outermost wires horizontally, indicated in Table. one.

Table 1

────────────────────────────────┬─────────────────────────────────

Line voltage, kV │Distance, m

────────────────────────────────┼─────────────────────────────────

St. 20 "35│15

The security zone of overhead power lines passing through water bodies (rivers, canals, lakes, etc.) is established as an air space above the water surface of water bodies, limited by parallel vertical planes spaced on both sides of the line at a horizontal distance from the outermost wires for navigable reservoirs - 100 m, for non-navigable reservoirs - at a distance indicated in Table. one.

2.2. Security zone along underground cable lines power transmission is installed in the form of a plot of land bounded by parallel vertical planes spaced on both sides of the line at a horizontal distance of 1 m from the outermost cables.

2.3. The security zone along the submarine cable power lines is established as a section body of water from the water surface to the bottom, enclosed between vertical planes spaced on both sides of the line at a distance of 100 m horizontally from the outermost cables.

3. ELECTRICAL SAFETY REQUIREMENTS

WHEN PERFORMING WORK IN SECURITY ZONES

3.1. Work in protected areas is carried out under the direct supervision of the person responsible for the safety of work, subject to the requirements of organizational and technical measures to ensure electrical safety in accordance with GOST 12.1.019.

If there is a justified impossibility to comply with these requirements, work is carried out only with the voltage removed.

3.2. In the security zone of power lines, it is prohibited to carry out activities that could compromise the safety and continuity of operation or in the course of which danger to people could arise. In particular, it is prohibited:

place storage facilities for fuels and lubricants;

arrange dumps;

carry out explosive work;

spread the fire;

dump and drain caustic and corrosive substances and fuels and lubricants;

throw supports on the wires and bring foreign objects closer to them, as well as climb the supports;

carry out work and stay in the security zone of overhead power lines during a thunderstorm or in extreme weather conditions.

3.3. Within the security zone of overhead power transmission lines, without the consent of the organization operating these lines, it is prohibited to carry out construction, installation and irrigation work, plant and cut down trees, store feed, fertilizers, fuel and other materials, arrange driveways for machines and mechanisms that have overall height with or without cargo from the road surface more than 4 m.

3.4. Within the security zone of underground cable power lines, without the consent of the organization operating these lines, it is prohibited to carry out construction and excavation, as well as ground leveling with the help of earthmoving machines.

3.5. Within the protected zone of submarine cable power lines, without the consent of the organization operating these lines, it is prohibited to carry out dredging and dredging, arrange moorings for ships, cast anchors, pass with anchors, chains, drags and trawls, allocate fishing areas and arrange watering places.

3.6. Performing work in the security zones of overhead power lines using various lifting machines and mechanisms with a retractable part is allowed only if the air distance from the machine (mechanism) or from its retractable or lifting part, as well as from the working body or the load being lifted in any position (including at the highest lift or reach) to the nearest wire located energized, will be not less than indicated in the table. 2.

table 2

────────────────────────────┬─────────────────────────────────────

Overhead line voltage, │Distance, m

kV ├─────────────

│ minimum │ minimum measured

││technical means

────────────────────────────┼─────────────┼───────────────────────

Up to 20│2.0│2.0

St. 20 "35│2.0│2.0

"35"110│3,0│4,0

"110 "220│4,0│5,0

"220 "400│5,0│7,0

"400 "750│9,0│10,0

"750 "1150│10,0│11,0

3.7. Irrigation work near live overhead power lines is allowed in cases where:

under any weather conditions, the water jet is not included in the security zone;

the water jet enters the buffer zone and rises to a height of no more than 3 m from the ground.

GOST 12.1.051-90 Occupational safety standards system (SSBT). Electrical safety. Safety distances in the security zone of power lines with voltage over 1000 V

GOST 12.1.051-90

Group T58

INTERSTATE STANDARD

SYSTEM OF WORK SAFETY STANDARDS

ELECTRICAL SAFETY

Safety distances in the security zone of power lines
voltage over 1000 V

Occupational safety standards system. electrical safety.
Distances of safety in the protective zone of power
transmission lines for voltages above 1000 V

OKSTU 0012

Introduction date 1991-07-01

INFORMATION DATA

1. DESIGNED AND INTRODUCED by the Ministry energy and electrification of the USSR

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Product Quality Management and Standards dated November 29, 1990 N 2971

3. Term of inspection - 2001, frequency of inspection - 10 years

4. The standard fully complies with ST SEV 6862-89

5. INTRODUCED FOR THE FIRST TIME

6. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

7. REPUBLICATION. June 2001

This standard applies to the security zones of power lines and establishes safety distances from live parts under voltage over 1000 V when performing work by persons who do not have electrical qualifications.

This International Standard does not specify safety distances from live parts for personnel working on electrical installations.

1. GENERAL PROVISIONS

1. GENERAL PROVISIONS

1.1. Protection of persons from electric shock is ensured by the design of power lines, technical methods and means, organizational and technical measures and control of electrical safety requirements in accordance with GOST 12.1.019.

1.2. Protection of persons from electric shock when performing work near live parts under voltage over 1000 V is ensured by the establishment of security zones, instructing workers about the danger of touching or approaching live parts and observing the established safety distances.

2. SECURITY ZONES OF POWER LINES

2.1. The security zone along overhead power lines is established as an airspace above the ground, limited by parallel vertical planes spaced on both sides of the line at a distance from the outermost wires horizontally, indicated in Table 1.

Table 1

The security zone of overhead power lines passing through water bodies (rivers, canals, lakes, etc.) is established as an air space above the water surface of water bodies, limited by parallel vertical planes spaced on both sides of the line at a horizontal distance from the outermost wires for navigable reservoirs - 100 m, for non-navigable reservoirs - at a distance indicated in Table 1.

2.2. The security zone along underground cable transmission lines is established as a piece of land bounded by parallel vertical planes spaced on both sides of the line at a horizontal distance of 1 m from the outermost cables.

2.3. The security zone along submarine cable power lines is established as a section of water space from the water surface to the bottom, enclosed between vertical planes spaced on both sides of the line at a horizontal distance of 100 m from the outermost cables.

3. ELECTRICAL SAFETY REQUIREMENTS WHEN PERFORMING WORK IN SECURITY ZONES

3.1. Work in security zones is carried out under the direct supervision of the person responsible for the safety of work, subject to the requirements of organizational and technical measures to ensure electrical safety in accordance with GOST 12.1.019.

If there is a justified impossibility to comply with these requirements, work is carried out only with the voltage removed.

3.2. In the security zone of power lines, it is prohibited to carry out activities that could compromise the safety and continuity of operation or in the course of which danger to people could arise. In particular, it is prohibited:

place storage facilities for fuels and lubricants;

arrange dumps;

carry out explosive work;

spread the fire;

dump and drain caustic and corrosive substances and fuels and lubricants;

throw supports on the wires and bring foreign objects closer to them, as well as climb the supports;

carry out work and stay in the security zone of overhead power lines during a thunderstorm or extreme weather conditions.

3.3. Within the security zone of overhead power lines, without the consent of the organization operating these lines, it is prohibited to carry out construction, installation and irrigation work, plant and cut down trees, store feed, fertilizers, fuel and other materials, arrange driveways for machines and mechanisms having a common height with or without cargo from the road surface more than 4 m.

3.4. Within the security zone of underground cable power lines, without the consent of the organization operating these lines, it is prohibited to carry out construction and excavation work, as well as soil leveling with the help of earthmoving machines.

3.5. Within the protected zone of submarine cable power lines, without the consent of the organization operating these lines, it is prohibited to carry out dredging and dredging, arrange moorings for ships, cast anchors, pass with anchors, chains, drags and trawls, allocate fishing areas and arrange watering places.

3.6. Performing work in the security zones of overhead power lines using various lifting machines and mechanisms with a retractable part is allowed only if the air distance from the machine (mechanism) or from its retractable or lifting part, as well as from the working body or the load being lifted in any position (including at the highest rise or departure) to the nearest live wire will be no less than that indicated in Table 2.

table 2

3.7. Irrigation work near live overhead power lines is allowed in cases where:

under any weather conditions, the water jet is not included in the security zone;

the water jet enters the buffer zone and rises to a height of no more than 3 m from the ground.

The text of the document is verified by:
official publication

"System of labor safety standards". Sat. GOSTs -
M.: IPK Standards Publishing House, 2001

GOST 12.1.051-90 Occupational safety standards system (SSBT). Electrical safety. Safety distances in the security zone of power lines with voltage over 1000 V

GOST 12.1.051-90 Occupational safety standards system (SSBT). Electrical safety. Safety distances in the security zone of power lines with voltage over 1000 V

Notation

Description

Steel 12X18H10T is used: for the manufacture of forgings for parts of general engineering; parts of chemical equipment; parts operating at temperatures up to +600 °C; welded apparatuses and vessels operating in dilute solutions of nitric, acetic, phosphoric acids, solutions of alkalis and salts; parts operating under pressure at temperatures from -196 to +600 ° C, and if available aggressive environments up to +350 °С; aircraft parts; commodities for household; devices and parts Food Industry; connections of equipment operating in radioactive environments and in contact with aggressive environments; as a cladding layer in the manufacture of hot-rolled two-layer corrosion-resistant sheets; solid-rolled rings for various purposes and welded rings from a sheet profiled by rotational deformation for power engineering equipment and the chemical industry; cold-rolled steel and bent profiles intended for the manufacture of sheathing and carcass of passenger car bodies; sheet metal with a thickness of 40 mm to 160 mm used in the manufacture of parts and structures of shipbuilding, operating in conditions sea ​​water; double and triple lay ropes for special conditions work; seamless cold-rolled, cold-drawn and heat-rolled pipes intended for high quality pipelines and fittings; woven wire mesh of twill weave used as a reinforcing material in the manufacture of asbestos steel sheets, for separating loose bodies by grain size, filtration and other purposes; spring wire, intended for the manufacture of cylindrical springs operating in air and aggressive environments (sea water, salt and chlorine solutions, sea water vapor, in tropical climates) at temperatures from -253 ° C to +300 ° C and used in turbine seals, safety valves, pumps, regulators, compressors; torsion springs; bimetallic sheets with aluminum alloy AMg6, intended for the manufacture of flat adapters general purpose; centrifugally cast pipes used as components in the equipment of the metallurgical, machine-building, glass, ceramic, mining and processing petrochemical industries, as well as intended for the manufacture of blanks and parts used in the composition of products of the aviation and nuclear industries.

Note

The steel is corrosion-resistant, heat-resistant and heat-resistant.
Stabilized austenitic chromium-nickel steel.
The recommended maximum operating temperature for a long time is +800 °C.
The recommended maximum operating temperature for a very long time is +600 °C.
The temperature of intense scaling in air environment 850°C.

Standards

Chemical composition

Fe- the foundation.
According to GOST 5632-72, TU 108-930-80 and TU 14-1-748-73 content of Ti% = 5C% - 0.8%. For aircraft parts, the content of Mo % ≤ 0.30%.
According to TU 14-1-2902-80, the content of Ti% = 5(С-0.02)% - 0.7%. At the request of the consumer, the content of Mn ≤ 1.0% can be set.
According to TU 14-1-2186-77 and TU 3-1002-77, the content of Ti% = 5(С-0.02)% - 0.7%.
According to TU 14-158-137-2003, the content of Ti% = 5C% - 0.7%. It is allowed to introduce cerium and other rare-earth metals according to the calculation of 0.2-0.3%, which chemical analysis are not defined.
According to TU 14-1-686-88, the chemical composition is given for steel 12Kh18N10T-VD. The content of Ti% = 5(C-0.2)% - 0.7%. Deviations from the content of elements in the chemical composition of steel, not established by TU - in accordance with GOST 5632.
According to GOST 19277-73, the chemical composition is given for steel 12Kh18N10T-VD; steel grade 12X18H10T must have a chemical composition in accordance with GOST 5632. Limit deviations according to the chemical composition - in accordance with GOST 5632. The mass fraction of titanium in steels 12Kh18N10T and 12Kh18N10T-VD should be Ti% \u003d 5 (C-0.02)% - 0.7%.
According to TU 14-3R-115-2010 mass fraction titanium in steel 08X18H10T should be Ti% = 5C% - 0.7%, but not less than 0.30%.
According to TU 14-1-3581-83, the chemical composition is given for steel 12Kh18N10T-VD. The content of Ti% = 5C% - 0.8%.
According to TU 14-1-632-73, the chemical composition is given for steel grade 12Kh18N10T-VD. Titanium content Ti = (C-0.02)x5% -0.7%. Allowed in finished products deviations from the norms of the chemical composition: for carbon -0.10%, for manganese -0.30%, phosphorus +0.0050%.

Mechanical characteristics

Description of mechanical symbols

physical characteristics

Description of physical symbols

Technological properties