SY 5727-1995 Safety requirements for electricity use in underground operations SY5727-1995 standard download decompression password: www.bzxz.net

Petroleum and Natural Gas Industry Standard of the People's Republic of China SY 5727—1995
Safety Requirements for Electricity Use in Well Sites of Downhole Operations
Published on November 8, 1995
China National Petroleum Corporation
Implementation on May 1, 1996
Cited Standards
Distribution Lines and Power Generation
Distribution Box
Electric Heater
Protective Grounding and EarthingwwW.bzxz.Net
Electrical equipment and lines used in well sites of downhole operations are located in the wild environment, and there are flammable and explosive areas. The operation and construction are frequently moved, and there is no unified standard for the safety requirements of electricity use. In order to ensure the safe use of electricity in the well site of downhole operations, this standard is specially formulated. This standard is proposed and issued by the Oil Industry Safety Professional Standardization Technical Committee. The drafting units of this standard are: Safety Technology Department of the State Administration of Petroleum and Natural Gas, Shengli Oil Production Plant of Shengli Petroleum Administration. The main drafters of this standard are Wang Zhian, Wang Dengwen, Guo Li, Chen Jianshe, Xiao Yuncheng, Zhang Yong, and Junrong. 1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Safety Requirements for Electricity Use in Well Sites for Downhole Operations
This standard specifies the safety requirements for electricity use in well sites for underground operations. This standard applies to production operations in well sites for underground operations during onshore oil exploration and development. 2 Referenced Standards
SY 5727--1995
The provisions contained in the following standards constitute the provisions of this standard by being applicable in this standard. When this standard was published, the versions shown were all valid. All standards will be revised: All parties to this standard should explore the possibility of using the latest versions of the following standards GB4706.23-88 Safety of household and similar electrical appliances Special requirements for indoor heaters JG146-88 Technical specifications for temporary power safety at the site of construction SY6023-94 Safety production inspection regulations for Yunyou underground operation team 3 Distribution lines and power generation
3.1 Distribution lines
3I.1 The power lines of underground operation and field special Sichuan should use IN-S zero protection system. The metal shell of the electrical equipment is connected to the dedicated protection neutral line. The dedicated protection neutral line should be drawn from the working grounding line, the neutral line of the distribution room or the neutral line on the power supply side of the first-level leakage protector as shown in Figure 1.
Figure TNS zero protection system
1-Working grounding; 2 Repeated grounding: 3-Leakage guide part of electrical equipment: LL1 Phase line: N Working neutral line: PE-Protective neutral line 3.1.2 Field distribution lines should use rubber-sheathed soft cables. And fire prevention measures should be considered. 3.1.3 The selection of cable cross-section should meet the following requirements: a) The load current in the conductor should meet the long-term working temperature of no more than 6s; b) The voltage deviation at the end of the line should not be greater than 5% of the rated voltage: the cross-section of the neutral line of the single-phase line is the same as the cross-section of the phase line, and the cross-section of the working neutral line and the protective neutral line of the three-phase four-wire system should not be less than 50% of the cross-section of the phase line.
3.1.4 When the cable is laid overhead, the direction should be reasonable, and the spacing between the fixed points should ensure that the rubber-sheathed cable can withstand the tension caused by the weight. The minimum distance between the cable and the ground should be greater than 2.5m
3.1.5 It is advisable to use non-corroded poles for overhead cable laying: the diameter of the tip should not be less than 501111 When using metal poles: the rubber-sheathed cable should be fixed at the insulation treatment, bare metal wires should not be used for binding wires, and the poles should be buried firmly. Approved by China National Petroleum Corporation on November 8, 1995, implemented on May 1, 1996
SY 5727—1995
3.1.6 Cable laying underground! The depth should not be less than 0.6m. Fine sand with a thickness of 50m11 should be evenly laid above and below the cable, and then covered with a hard protective layer such as bricks.
3.1.7 When the cable is used by dragging the ground, heavy rubber-sheathed soft cable should be used. 3.1.8 The cables used in the field should not have intermediate joints. 3.2 Duty room wiring
Duty room wiring should use insulated wires and be installed with porcelain bottles or porcelain clamps. 3.2.2
The wire should be protected by an insulating tube when passing through the wall. It should not be less than 2.5m from the ground, and a rainproof bend should be installed. The wire cross-section should be determined based on the load calculation of the electrical equipment. 3.2.3
The insulation resistance between the conductor and the ground should be greater than 0.5M2.3.3
The distance between the generator room and the riser and the flushing pool should be greater than 201m. The generator operator should be certified to operate, and non-operating personnel should not enter the generator room. The engine exhaust pipe of the generator should be equipped with a flame arrester. 3.3.3
The outlet of the generator output line should be connected with an insulating hose3.3.5
The generator should be grounded for protection and working grounding. The basic body, auxiliary equipment and protective devices of the generator should be fully inspected and tested, and can only be started after meeting the requirements3.3.6
The generator load should not be opened at the rated power
When using the generator for power supply, there should be measures to prevent the reverse transmission of power to the external power supply system. 4 Distribution box
Equipment of distribution box
The distribution box should be installed in the duty room and kept dry and ventilated. 4.1.2
The distribution box should be installed straight and firmly. The distance between the center of the box and the ground should be about 1.5m, and there should be enough working space and passage. 4.1.3 The electrical appliances in the distribution box should not use combustible materials as mounting plates. If a metal mounting plate is used, it should be electrically connected to the distribution box body.
The switches and electrical appliances in the distribution box should be installed firmly. The connecting wires should be insulated wires, and the joints should not be exposed or loose. 4.1.4
The selection of electrical devices in the distribution box should be in accordance with Chapter 7, Section 2 of JGJ46-88. 4.1.5
The main switch of the distribution box should be equipped with a leakage protector. 4.1.6
4.2 Use and maintenance of distribution box
The circuit name and purpose marked on the distribution box should be consistent with the actual situation. 4.2.1
The door of the distribution box should be locked and managed by a dedicated person. 4.2.2
The distribution box should be inspected and maintained regularly by a certified electrician4.2.3
4.2.4The distribution box should be operated by a designated person, who should master the basic knowledge of safe electricity use, be able to perform power-off and power-off operations, and have the ability to eliminate general faults
4.2.5The operator of the distribution box should do the following:
\) Before use, the electrical equipment and protective facilities should be checked:b) When the power supply equipment is out of service, the power supply should be cut off;c) Check the operation of the electrical equipment, lines and distribution boxes in the well site, and deal with problems in a timely manner;d) When relocating or moving electrical equipment, the power supply should be cut off firste) The distribution box should be kept clean
4.2.6 The relocated or moved power supply equipment should be inspected and qualified before use. 4.2.7 When replacing the fuse of the distribution box, do not replace it with a fuse that does not meet the original specifications. 4.2.8 The inlet and outlet wires of the distribution box should not be subjected to external forces, and should not come into contact with metal fractures and corrosive media. 5 Lighting
5.1 Lighting power supply
SY 5727-1995
5.1.1 The lighting power supply should adopt a double-winding type safety lighting isolation power supply, and the lighting voltage should be 220V and below. 5.1.2 If a three-phase four-wire lighting power supply is used, when the lighting lamp is an incandescent lamp, the cross-section of the neutral wire should be selected according to 50% of the current carrying capacity of the phase line; when the lighting lamp is a gas discharge lamp, the cross-section of the neutral wire should be selected according to the current of the maximum load phase. 5.2 Lighting devices
5.2.1 Metal halide lamps should be used for lighting lamps. 5.2.2 The derrick lighting and well site lighting fixtures shall comply with 6.2 of SY6023-94. 5.2.3 The wiring of the screw-type lamp holder shall meet the following requirements: a) The neutral wire is connected to the end connected to the center contact, and the neutral wire is connected to the end connected to the screw-type. The insulating shell of the lamp holder shall not be damaged or leak. 5.2.4 The wiring inside the lamp shall be firm. The wiring outside the lamp shall be reliably insulated. 5.2.5 The phase line of the lamp shall be controlled by a switch in the distribution box, and the phase line shall not be directly connected to the lamp. 6 Electric heater
The selection of electric heaters shall comply with GB4706.23.
The power cord of the electric heater shall comply with 3.1.3
The electric heater shall be equipped with a separate control switch and fuse in the distribution box. 6.4
The protective cover of the electric heater shall be firm and complete.
Flammable materials should not be placed or baked within 0.5m of the electric heater: 7
Protective connection and grounding
The metal shells of electrical appliances such as distribution boxes, electric heaters, and lamps should be grounded. 7.2
All protective zeros should be reliably grounded, and the metal frame of the duty room should not be used as a grounding connector. Angle steel, steel pipe or round steel should be used for the vertical grounding body, and aluminum conductors should not be used as grounding bodies or underground grounding wires. 7.3
The grounding resistance of the protective grounding device should not be greater than 1027.4
After each operation is moved and assembled, the protective connection and grounding device shall be checked by a certified electrician and qualified before it can be used normally. 7.54
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