SY 5856-1993 Safety regulations for live working in oil and gas field electrical industry
Some standard content:
Subject content and scope of application
Petroleum and natural gas industry standard of the People's Republic of China Safety regulations for live working in oil and gas power industry
This standard specifies the specific technical requirements for safety work of live working in oil and gas field power industry. SY 5856--93
This standard applies to live working and low voltage live working on AC 6~220kV lines with a length of no more than 1000m*, substation (power plant) electrical equipment using equal potential, intermediate potential and ground potential: 2 Reference standards
2.1DL408 Safety working regulations for electric power industry
2.2DL409 Safety working regulations for electric power industry
2.3GB311.1 Insulation matching platform for high-voltage substation equipment 2.4DL415 Spark gap detection device for live working 3 General provisions
3.1 Live working should be carried out under good weather conditions. Live work shall not be carried out in rain, snow or fog. Live work is generally not suitable on cloudy days (relative humidity not less than 85%) and wind speed not less than level 5 (and wind speed not less than 8m/s at 10m above ground).
3.2 Electric work shall be carried out by electricians who have passed special training and assessment and hold certificates. The assistants shall take an examination on this regulation every year. Those who have been absent for more than three months shall take the examination again and can only take up their posts after passing the examination. 3.36~10kV live work should use insulated operating rods, and the safe distance between the operator and the live parts must be maintained. Insulated boots and insulating gloves should be worn during operation, and the parts that may be touched should be isolated with insulating covers. 3.46~35kV porcelain cross-arm lines are not allowed to hang ladders. 3.5 The issuer of the work permit for assisting the electric work and the person in charge of the work should have practical experience and knowledge in live work. The issuer of the work permit and the person in charge of the work must be approved by the superior leader.
3.6 Live work must be supervised by a dedicated person. The supervisor should be someone with experience in live work. For complex or high pole tower work, additional (tower) supervision should be provided.
3.7 Live work workers are strictly prohibited from drinking alcohol 8 hours before work. 3.8 Before live work, it must be implemented on site, and the "Live Work Work Ticket" must be filled out. The work can only be carried out after the power dispatcher reviews and signs it. After the work is completed, report to the power dispatcher. 3.9 Deactivation and restoration of the reclosing switch
3.9.1 Live work should be deactivated and power should not be forced to be supplied if any of the following situations occur: a. The work may cause single-phase grounding in the system with effective neutral point grounding; b. The work may sometimes cause phase-to-phase short circuit in the system with ineffective neutral point grounding; c. The work before the reclosing is considered necessary to be deactivated by the issuer of the work ticket or the person in charge of the work. 3.9.2 It is strictly prohibited to deactivate or restore the reclosing switch at an unscheduled time. Approved by China National Petroleum Corporation on January 6, 1994, implemented on June 1, 1994
SY 5856—93
3.10 Organizational measures to ensure safety shall be implemented in accordance with DL409. 3.11 After arriving at the site, the supervisor shall explain the work tasks, objectives, process procedures and safety measures to all personnel working on the live line. The live line workers can only start working after repeating them correctly. 3.12 Live line workers should concentrate on their work, strictly implement the operating process procedures and safety measures, wear necessary protective equipment, and obey the instructions of the supervisor. The supervisor should pay close attention to the safety of the live line workers, issue orders one by one according to the operating process procedures and in combination with the on-site situation, and record them for future reference. 3.13 Live line workers must strictly implement the regulations and obey the instructions of the supervisor, but they should refuse to execute wrong orders that are harmful to personnel or equipment, and state the reasons for not executing the orders. 3.14 If the equipment suddenly loses power during live working, the operator should consider that the equipment is still powered. The person in charge of the work should contact the power dispatcher as soon as possible, and the power shall not be forced to be supplied before the power dispatcher contacts the person in charge of the work. 3.15 Live working tools must meet the requirements of electrical strength and mechanical strength. 3.16 The weight of tools used by individuals should not exceed 5kg, and the weight of tools used on the pole should not exceed 10kg. 3.17 The personnel of live working should maintain a stable position, and their composition and transfer should be approved by the technical competent department. 3.18 The personnel of live working must be proficient in first aid for electric shock and upper respiratory methods. Working with insulated operating poles
4.1 Insulated tools should be carefully checked for damage before use and wiped clean. If in doubt, a 2500V megohmmeter should be used for measurement, and the insulation resistance of the effective length should not be less than 10000MS, or the insulation resistance of the segmented measurement (electrode width 2cm, pole width 2cm) should not be less than 700M2.
4.2 Live workers should be familiar with the use of tools. Scope of use and maximum allowable working load. Foam-filled insulating rods and fully insulated hanging ladders should be used as much as possible. Live workers must wear insulating safety helmets, use insulated silk safety and equipped with safety ropes, wear insulating boots and wear insulating gloves.
4.3 The minimum safety distance between the human body and the electrical body should comply with the provisions of Table 1. Table 1
Package voltage level, kv
Safety distance, n
Not more than 10
Note: The 220kV safety distance in the table is 1.8m. 1.6m can only be used if it is limited by equipment and approved by the technical supervisor and necessary safety measures are taken.
4.4 The effective insulation length of the insulated operating rod, insulating tools and insulating rope shall not be less than the provisions of Table 2. The effective insulation length of the transfer rope shall be considered according to the effective insulation length of the insulating rod. Table 2
When the voltage is equal to the voltage,
is longer than 10
insulated operating rod
length, add
insulated two-tool rope
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When using an insulated bucket car, the extended length of the insulated arm should be increased by 1m according to the effective insulation length of the insulated rod operation. 4.5 On 35~220kV equipment, no matter what reason or what kind of lifting tool is used, when separating the conductor from the inductive porcelain bottle, reliable backup protection measures must be installed.
4.6 The distance of all non-insulated ropes (cotton yarn, white brown rope, steel wire rope) to the live body shall not be less than the value in Table 3. Table 3
Voltage level, V
Minimum distance. 11
4.7 When working with live moving conductors, if there are power lines, weak current lines, substation equipment and other objects to be crossed below, the vertical distance must be measured before the operation, and obvious warning signs must be made. During the operation, a special person should be assigned to monitor the intersection, and the vertical distance between the moving conductor and the equipment to be crossed must not be less than the provisions of Table 4.
Voltage level, kV
Not more than 10
5 Live disconnection and connection of leads
5.1 When disconnecting and connecting unloaded lines, the following provisions must be observed, minimum distance,
5.1.1 When disconnecting and connecting unloaded lines, it is necessary to confirm that the terminal switch (or knife switch) of the line has been disconnected, and the transformer and voltage transformer connected to the line side have been shut down before proceeding. It is strictly forbidden to disconnect and connect leads with load. 5.1.2 When disconnecting and connecting unloaded lines, operators should wear protective glasses and take arc extinguishing measures. The current-breaking capacity of arc-extinguishing tools should be compatible with the voltage level and capacitive current of the disconnected and connected unloaded lines. If arc-extinguishing rope is used, the length of the disconnected and connected unloaded lines should not exceed the provisions of Table 5, and the operator should keep a distance of more than 4m from the disconnection point. Table 5
Voltage level, IV
Degree, km
Not more than 10
5.1.3 After it is confirmed that the line bowl is not grounded, the insulation is good, no one is working on the line and the position is confirmed correctly, the live wire disconnection and connection can be carried out.
When live connection is carried out, the unconnected wires and the disconnected wires, and the disconnected wires will be charged due to induction. To prevent electric shock, 5.1.4
should be touched only after the measures are taken.
5.1.5 It is strictly forbidden to touch the two ends of the unconnected or disconnected wires at the same time to prevent the human body from entering the circuit. 5.2 When disconnecting and connecting an empty line, it is recommended to use the following approximate formula to calculate the no-load current. -K-UL×10-a
I. ——Maximum single-phase capacitance current of an empty line, A System line voltage, kV
L Length of empty line, km,
SY5856-93
K coefficient (1.6~2.0), 6~35kV, k is 1.6, 110~220kV, k is 2.0, and the voltage level is selected according to the insertion method.
5.3 When disconnecting and connecting an empty line, the arc extinguishing device should first be determined according to the small value of the capacitance current of the empty line. If the capacitance current of the line is less than 5A, an arc extinguishing rope should be used. Otherwise, an arc extinguishing device that adapts to the capacitance current and meets the requirements of the operating overvoltage should be used for disconnection and connection. 5.4 When disconnecting and connecting the lead wire, the requirements for the fire protection distance of the gas well should be considered, and it should generally be 3011 outside the oil and gas well. 6 Equipotential work
6.1. Equipotential workers must wear qualified shielding suits, fireproof underwear inside, and ensure good contact of the voltage-equalizing part. The DC resistance between any two points of the shielding suit (clothes, socks, shoes, gloves) from head to toe shall not exceed 52. 6.2 The safe distance of equipotential workers to the ground and adjacent phase conductors shall not be less than the provisions of Table 6. Table 6
Other voltage level, kw
Safe distance to ground, II
Safe distance to adjacent phase conductor, m
6.3 When equipotential workers enter and exit the strong electric field to transfer potential, the minimum distance of the unshielded part of the body to the auxiliary electric body shall not be less than the provisions of Table 7 to prevent arc burns. Table 7
Voltage level, kV
Minimum distance, n
6,4 When hanging an insulating soft ladder or flying car on the conductor and ground wire, the distance between the conductor and ground wire shall not be less than the value in Table 8. Table 8
Wire type
Section of wire, mn
Aluminum stranded wire
110-220
Steel stranded wire
When the surface is less than the above requirements or the rust is serious and there are broken strands, the safety factor when hanging the ladder should be verified to be not less than 2.5 according to the working temperature, and appropriate backup measures should be taken. The operation can only be carried out after being approved by the leader in charge of technology. 6.5 When hanging an insulated ladder on the upper conductor, the distance between the upper wire and the lower conductor or the crossed object after it is hung down shall not be less than the requirements of Table 9. At the intersection, it is generally not recommended to hang an insulated ladder. Table 9
Level of power station, V
Minimum distance: m
6.6 When equipotential personnel enter the strong electric field along the insulated ladder, the combined air gap (one charged body and one grounding body) should not be less than the value in Table 10.
6.7 Equipotential work: Work in which people enter a strong electric field along an insulator string can only be performed on insulators of 220kV and above. After deducting the insulator pieces that are short-circuited by the human body and the zero value, the number of good insulator pieces shall not be less than the provisions of Table 15, and the combined gap shall not be less than the provisions of Table 10. If the combined gap does not meet the provisions of Table 10, a protective gap should be installed. Table 10
Voltage level, kv
Combined gap, m
6.8 During equipotential work, it is strictly forbidden to wipe the live body and the insulating part with flammable products such as cotton yarn, gasoline, and alcohol to prevent fire. The ropes and safety belts that contact the wrong body should be made of silk products, and nylon products are not allowed. Live water washing work
7.1 Live water washing should be carried out in good weather. It is not suitable to be carried out when the wind force is above level 4, the temperature is below minus 3, rainy, snowy, foggy and electric weather.
7.2 Before the live water washing operation, the dirtiness of the insulator should be known. When the salt density value is greater than the critical salt density value specified in Table 11, it is not suitable to carry out water washing. Otherwise, the water resistivity should be increased to remedy the situation. It is not suitable to carry out live water washing for lightning arresters and equipment with poor sealing. Table 11 is applicable to the voltage of -220kV. Table 11
Filter ratio range
inm/ky
Water strength ratio
Yajie salt density
Weir electric distance
Water resistivity
Criminal salt density
(Ordinary type)
14.8～16
and above
(Pujiang type)
and above1
20～31
Method: Creepage ratio refers to the ratio of the creepage distance of the insulation of the equipment to the maximum voltage of the equipment from the power supply. 7.3 The water washing method is not allowed to be used for oil pollution of insulators caused by parallel spraying. 3000
(Anti-pollution type)
and above
(Anti-pollution type)
7.4 Before washing, the water resistivity of the live washing water should be measured. The resistivity of water used for flushing 110~220kV equipment should not be lower than 30002.cm. The water pressure used for water flushing shall be based on the flushing effect. 75
For charged water flushing with water column as the main element, the length of the water column between the nozzle and the conductor should not be less than the value in Table 12. Table 12
Foam pressure level
Small water (not more than F3mm)①
Note: ① refers to the nozzle diameter.
Medium water (4~8mm)
Not grounded
Large water flushing (9~12mm)①
Not connected to the pool
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76The combined insulation of the small water flushing tool composed of a water column, an insulating rod, and a water diversion pipe (referring to the effective insulating part) shall meet the following requirements: 7.6.1 Under working conditions, it shall be able to meet the requirements of the test items and standards of the corresponding voltage level insulating tools. 7.6.2 The current flowing through the operator's body under the maximum frequency overvoltage shall not exceed 1mA, and the test time shall not be less than 5min. 7.7 When flushing with a small water flushing with combined insulation, it is strictly forbidden for the flushing tool to touch the live body. The effective insulating part of the water diversion pipe shall not touch the grounding body. The use and storage of the operating rod shall be carried out in accordance with the relevant regulations of live working tools. 7.8 During the process of live water flushing, the flushing tools and the live body should maintain a sufficient safety distance. The water pump used for flushing must be well grounded, and the grounding resistance should not exceed 109. The gun-holders of large-scale water flushing should wear high-voltage insulating boots, insulating gloves and stand on the insulating platform. To ensure personal safety, the gun-holders should wear shielding clothing. 7. The nozzle diameter and water pressure for live water flushing should be based on the flushing effect and ensure that the water column does not splash. The water pump pressure should be adjusted before flushing. When the water is insufficient, the muzzle should not be pointed at the live body. 7.10 When flushing live water, flush the downwind insulator first, and then flush the upwind insulator. When flushing the general insulator, it is necessary to start from the first porcelain bottle of the conductor and flush from bottom to top. When flushing the supporting insulators of substation equipment, it should still be flushed from bottom to top to prevent dirty flashover. When flushing double porcelain bottles, the two pieces at the corresponding position should be completed at the same time. It is strictly forbidden to flush the other porcelain bottle after washing one string. When flushing the porcelain bottle on the tower where the conductors are arranged vertically, the flushing sequence should be from the lower phase, the middle phase to the top phase. When flushing the substation equipment with a high-type layout, the lower equipment should be flushed first, and then the upper equipment. It is strictly forbidden to flush the upper equipment of the lower layer with lightning arresters. 7.11 Before flushing with live water, make sure that the insulation of the equipment is good. If there are low-value and zero-value insulators and cracks in the porcelain bottle, it is generally not allowed to flush. 7.12 Before flushing with live water, you should contact the power dispatcher. If the system is grounded, the flushing should be stopped. Inspection and replacement of 8-dimensional insulators
Use spark gap live detection of the suspension insulation of 35kV and above F: equipment. If the number of deteriorated insulators found during the detection reaches the specified time in Table 13 8.1
, the detection should be stopped.
voltage, kV
number of pieces in the whole string,
number of pieces in the exhaustion,
8.2 The voltage distribution of the supporting porcelain bottle of the combined component is not recommended to use spark gap detection. 110
8.3 When detecting the zero-value or low-value insulators of each electrical level suspension insulator string, the corresponding gap distance is shown in Table 14. When adjusting the gap distance, a special feeler gauge should be used,
rated cell voltage, kv
ball-electrode
8.4 The requirements for the gap discharge test shall comply with the provisions of DL415. 8.5 When replacing the insulation with power, the number of good insulator pieces in the string shall not be less than the provisions of Table 15. Distance, mm
Pointed to pointed electrode
8.6 On 35~220kV live equipment, when disassembling and installing the first porcelain bottle by the cross arm, the staff should wear shielding clothing and short-circuit the first porcelain bottle before the staff can directly carry out the work.
8.7 In the same tension section, the tension porcelain bottles at both ends of the interphase conductor shall not be replaced at the same time, 6
Electricity level, kV
Number of insulators, pieces
9Induction voltage protection
SY 5856-·93
9.1 When inspecting one circuit in a 110~220kV double-circuit tower, the maintenance personnel are required to wear conductive shoes and conductive gloves, and wear conductive clothing when necessary to prevent personal injury due to induced numbness and electricity.
9.2 When performing maintenance on a parallel 220~500kV line or performing work on a substation structure, anti-static induction measures must be taken.
93 When working on a line with a high induced voltage, the induced voltage should be calculated and a single personal grounding wire should be appropriately added. 9.4 The insulated overhead ground wire should be regarded as a live body, and the distance between the operator's body and the insulated overhead ground wire should not be less than 0.4m. If it is necessary to work on the insulated overhead ground wire, it should be reliably grounded with a grounding wire or the equipotential method should be used. 9.5 When using an insulating rope to transfer metal objects, the tower or ground auxiliary workers should ground the metal objects before touching them to prevent electric shock.
9.6 When thunder and visible lightning are found nearby during work, the work should be stopped immediately and the workers should return to the ground. 10 Elevated insulated bucket storage car
10.! Before live work, the insulating parts should be wiped clean and visually inspected for damage. 10.2 Before use, the insulator should be carefully inspected and tested once in the empty bucket at the predetermined position. It can only be used when it is confirmed that the hydraulic transmission, rotation, lifting, and telescopic systems are working normally, the operation is flexible, and the braking device is reliable. 10.3 The operator in the insulated bucket should wear an insulating safety belt. 10.4 The insulated arm shall not be raised beyond the design requirements. The effective insulation length of the insulated arm shall be greater than the provisions of Table 16, and a leakage current monitoring device shall be installed at its lower end. 10.5
Voltage level, kv
Degree, m
35--68
10.6 Before work, the insulated bucket shall be in contact with the free conductor for 5 minutes, and the leakage current along the insulated arm shall be checked to be no more than 1μA/kV. 10.7 The metal part of the lower section of the insulated arm shall be increased by 0.5m to the live body during the lifting and rotation process according to the test length value specified in Table 18.
The working body is well grounded during work, and ground personnel are not allowed to touch the body. 10.8 When the insulation is used for 1035kV live working, its wall thickness and layer insulation level shall meet the requirements of the voltage in Table 19. 10.9 Personnel operating the insulated boom truck shall be familiar with the relevant regulations for live working and receive special training. During the working process, they shall not leave the operating table, and the engine of the boom truck shall not be turned off. 10.10 The supervisor and the staff in the insulated bucket shall communicate the operation command by intercom. 11 Protection gap
11.1 When the insulation distance of the insulating material or air is affected by a certain live working method, a protection gap can be used to reduce the probability of overvoltage flashover in the working area to provide protection. The protection gap can be installed at the end of the electric component on which it is working, or on both sides. 7
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11.2 The grounding wire of the protection gap should be a multi-strand soft hook wire. Its cross section shall meet the requirements of grounding short-circuit capacity, but the minimum shall not be less than 25mm.
11.3220kV arc-shaped protective gap, the gap distance is 0.7~~0.8m. 11.4 When using protective gap, the following provisions shall be observed. 11.4.1 Before hanging the protective gap, the power dispatcher shall be contacted to stop the reclosing switch. 11.4.2 When hanging the protective gap, it shall be reliably grounded to the grounding grid, and then the protective gap shall be hung on the conductor and make good contact. The removal procedure is the opposite. The distance between the protective gap lead and the human body shall comply with the provisions of Table 1. 11.4.3 After the protective gap is hung, a special person shall be assigned to guard it. In areas where people and animals pass by, fences shall be added. 11.4.4 Personnel who install and remove the protective gap shall wear a full set of shielding clothing. 11.4.5 It is strictly forbidden to touch both sides of the protective gap with both hands at the same time to prevent melting electricity. 12
Low-voltage live work
Low-voltage live work should be supervised by a dedicated person, and tools with insulated handles should be used. When working, stand on dry insulating materials and wear safety helmets and gloves. Long-sleeved clothes must be worn when working, and it is strictly forbidden to use files, metal rulers, brushes with metal objects, and other tools such as hair brushes. The human body must not touch two wire ends at the same time to prevent the human body from being electrocuted. 12.2 When high and low voltage are installed on the same pole, when working on low-voltage live lines, the distance from the high-voltage line should be checked first, and insulation isolation measures should be taken to prevent accidental contact with live high-voltage equipment. When insulation measures are not taken for low-voltage live wires, workers shall not cross. When working on live low-voltage distribution equipment, insulation isolation measures should be taken to prevent phase-to-phase short circuits and single-phase grounding. 12.3 Before going up the pole, the live and ground wires should be distinguished and the working position should be selected. When disconnecting the wires, the live wire should be disconnected first and the ground wire should be disconnected last. When overlapping the wires, the order should be reversed.
13 Testing and storage of tools
13.1 Tools for live working must be kept by a dedicated person, registered and signed, and specific storage measures must be formulated. They must be regularly maintained, inspected and tested, and the test date and test data must be marked.
13.2 Insulated tools, instruments and insulating materials for live working should be stored in a special warehouse with good ventilation, equipped with infrared bulbs or dehumidification equipment, and kept clean and dry at all times.
13.3 White gloves should be worn when touching insulating tools to prevent sweat erosion. Surface dust should be wiped with a clean towel. 13.4 Workers working with live working must have special suits, which must not be exposed to moisture, impact, extrusion or wear during transportation. At the work site, tools for live working should be placed in order on clean artificial leather cloth. 13.6 The insulating part of the elevated insulated boom truck should have a moisture-proof cover and should be stored in a ventilated and dry garage. 13.6 The insulation cover for isolation shall be subjected to a power frequency withstand voltage test once every six months. The test voltage is shown in Table 17. Table 17
Insulation cover voltage level
Rated voltage
Maximum working voltage
13.7 Electrical and mechanical tests shall be carried out regularly on live working tools. The test cycle is: lmin power frequency test voltage
a. Electrical test, preventive test times per year, inspection test once per year, the interval between the two tests is averagely 1 year, b. Mechanical test, insulation tools once a year, metal tools once every two years. 8
13.8 Unqualified live tools are not allowed to be used. $Y 5856—93
13.9 The electrical test items and standards for insulating tools are shown in Table 18. Table 18
13.10 Provisions for voltage withstand test
Test length
13.10.1 Power frequency voltage withstand test is qualified if there is no breakdown, flashover and overheating. l min
Type test
Protection test
13.10.2 The high-voltage electrode shall use a metal tube with a diameter of not less than 30mm, and the test object shall be suspended vertically. The distance between the grounding electrode and the ground is 1.0~1.2m. The grounding electrode and the electrode connected to the high voltage (when there is no metal) shall be wrapped with a 50mm wide metal pin. The distance between the test objects shall not be less than 500mm, the diameter of the equalizing ball on both sides of the single conductor shall not be less than 200mm, and the distance between the equalizing ball and the test object shall not be less than 1.5ml. The test object shall be tested as a whole and shall not be destroyed. 13.11 The inspection test conditions of insulating tools are: the insulating tools are divided into sections for power frequency withstand voltage, 75kV for every 300mm, and the time is 1min. The test is qualified if there is no breakdown, flashover and overheating. 13.12 The water washing tools of combined insulation should be subjected to electrical tests in the working state. In addition to the items and standard tests according to 18 (referring to voltage levels of 220kV and below), power frequency leakage tests are also added. The test voltage is shown in Table 19. The leakage current is not more than 1mA. The test time is 5min. The water resistivity during the
test is 15009·cm (applicable to voltage levels of 220kV and below). Zhang 19
Rated voltage, V
Test voltage, kv
13.13 Mechanical test standards for live working tools 35
13.13.1 The static load test should be carried out at 2.5 times the allowable working load for 5 minutes. The tool with no deformation or damage is qualified. 220
13.13.2 The dynamic load test should be carried out at 1.5 times the allowable working load. The tool should be operated three times according to the actual working state. The tool should be easy and flexible to operate and have no jamming phenomenon.
13.13.3 When the shielding suit is used in summer, it should be cleaned with 60℃ warm water (the ratio of shielding suit weight to water weight is 1:50~~1100) for 10 minutes every 10~~15 days, and then rinsed with clean water. The water bottle should be cleaned. During the washing and decontamination process, it is not allowed to be rubbed, and the cleaning material must be dried with a fan to accelerate the drying. The resistance value between the farthest points of the diaper should not be greater than 52. 13.13.4 The safety factor for the tensile force of the insulating rope should not be less than 5. Additional remarks:
This standard was proposed and approved by the Petroleum Industry Safety Professional Standardization Technical Committee. This standard was drafted by Shengli Petroleum Power Management Corporation. This standard is mainly drafted by Zhuo Yuqingze.10 The supervisor and the workers in the insulation pit should use intercom to communicate the operation order. 11 Protection gap
11.1 When the insulation distance of the insulating material or air is affected by a certain live working method, a protective gap can be used to reduce the probability of operating overvoltage flashover in the working area to provide protection. The protective gap can be installed at the end of the live electric component on which it is working, or on both sides. 7
SY5856—93
11.2 The grounding wire of the protective gap should be a multi-strand soft hook wire. Its cross-section should meet the requirements of the grounding short-circuit capacity, but the minimum should not be less than 25mm.
11.3220kV arc-shaped protective gap, the gap distance is 0.7~~0.8m. 11.4 When using the protective gap, the following regulations should be observed. 11.4.1 Before hanging the protective gap, contact the power dispatcher and stop the reclosing switch. 11.4.2 When hanging a protective gap, it should be reliably grounded to the grounding grid, and then the protective gap should be hung on the conductor and make good contact. The removal procedure is the opposite. The distance between the protective gap lead and the human body should comply with the provisions of Table 1. 11.4.3 After the protective gap is hung, a special person should be assigned to guard it. In areas where people and animals pass, fences should be added. 11.4.4 Personnel who install and remove the protective gap should wear a full set of shielding clothing. 11.4.5 It is strictly forbidden to touch both ends of the protective gap with both hands at the same time to prevent melting and electric shock. 12
Low-voltage live work
Low-voltage live work should be supervised by a special person, use tools with insulated handles, stand on dry insulating materials when working, and wear safety helmets and gloves. Long-sleeved clothes must be worn when working, and it is strictly forbidden to use files, metal rulers, brushes with metal objects, and other tools such as brushes. The human body must not touch two wire ends at the same time to prevent the human body from being electrocuted. 12.2 When high and low voltage are installed on the same pole, when working on low voltage live lines, the distance from the high voltage line should be checked first, and insulation isolation measures should be taken to prevent accidental contact with live high voltage equipment. Workers shall not cross the low voltage live wires before insulation measures are taken. When working on live low voltage distribution equipment, insulation isolation measures should be taken to prevent phase-to-phase short circuit and single-phase grounding. 12.3 Before going up the pole, the live wire and the ground wire should be distinguished, and the working position should be selected. When disconnecting the wire, the live wire should be disconnected first, and then the ground wire. When splicing the wires, the order should be reversed.
13 Testing and storage of tools
13.1 Tools for live working must be kept by a designated person, registered and signed, and specific storage measures should be formulated. They should be regularly maintained, inspected and tested, and the test date and test data should be marked.
13.2 Insulated tools, instruments and insulating materials for live working should be stored in a special warehouse with good ventilation, equipped with infrared bulbs or dehumidification equipment, and kept clean and dry at all times.
13.3 White gloves should be worn when touching insulating tools to prevent erosion by sweat. Surface dust should be wiped with a clean towel. 13.4 Workers working with live wires must have special suits, which must not be exposed to moisture, impact, extrusion or wear during transportation. At the work site, workers working with live wires should be placed in order on clean artificial leather cloth. 13.6 The insulating part of the elevated insulated boom truck should have a moisture-proof cover and should be stored in a ventilated and dry garage. 13.6 The insulating cover for isolation should be subjected to a power frequency withstand voltage test every six months. The test voltage is shown in Table 17. Table 17
Voltage level of insulation cover
Rated voltage
Maximum working voltage
13.7 Electrical and mechanical tests should be carried out regularly on live working tools. The test cycle is: lmin power frequency test voltage
a. Electrical test, preventive test once a year, inspection test once a year, the interval between the two tests is year, b. Mechanical test, insulating tools once a year, metal tools once every two years. 8
13.8 Unqualified live tools are not allowed to be used. $Y 5856—93
13.9 The electrical test items and standards of insulating tools are shown in Table 18. Table 18
13.10 Provisions for voltage withstand test
Test length
13.10.1 The power frequency voltage withstand test is qualified if there is no breakdown, flashover or overheating. l min
Shanguang and type testbZxz.net
This test
13.10.2 The high-voltage electrode should use a metal tube with a diameter of not less than 30mm, and the test object should be suspended vertically. The distance between the grounding electrode and the ground is 1.0~1.2m. The grounding electrode and the electrode connected to the high voltage (when there is no metal) are wrapped with a 50mm wide metal pin. The distance between the test objects is not less than 500mm, the diameter of the equalizing ball on both sides of the single conductor is not less than 200mm, and the distance between the equalizing ball and the test object is not less than 1.5ml. The test object should be tested as a whole and shall not be destroyed. 13.11 The inspection test conditions of insulating tools are: the insulating tools are divided into sections for power frequency withstand voltage, and the withstand voltage is 75kV for every 300mm for 1min. It is qualified if there is no breakdown, flashover and overheating. 13.12 The water flushing work of the combined insulation should be carried out in the working state. In addition to the items and coordinated tests according to 18 (referring to voltage levels of 220kV and below), a power frequency leakage test is also added. The test voltage is shown in Table 19. The leakage current is not more than 1mA. The test time is 5min.
The water resistivity during the test is 15009·cm (suitable for voltage levels of 220kV and below). Zhang 19
Rated voltage, V
Test voltage, kv
13.13 Mechanical test standards for live working tools 35
13.13.1 The static load test should be carried out at 2.5 times the allowable working load for 5min. The tools without deformation and damage are qualified. 220
13.13.2 The dynamic load test should be carried out at 1.5 times the allowable working load. The tools should be operated three times according to the actual working state. The tools should be easy and flexible to operate and have no jamming phenomenon.
13.13.3 When shielding suits are used in summer, they should be cleaned with 60℃ warm water (the weight of shielding suits should be 1:50~1100) for 10 minutes every 10~~15 days, and then rinsed with clean water. The water bottle should be cleaned thoroughly. During the washing and decontamination process, rubbing is not allowed, and the washing material must be dried quickly with a fan. The resistance value between the farthest points of the shielding suit should not be greater than 52.13.13.4 The safety factor for the tensile force of the insulating rope should not be less than 5. Additional remarks:
This standard was proposed and approved by the Petroleum Industry Safety Professional Standardization Technical Committee. This standard was drafted by Shengli Petroleum Management Power Management Corporation. This standard mainly includes the following:10 The supervisor and the workers in the insulation pit should use intercom to communicate the operation order. 11 Protection gap
11.1 When the insulation distance of the insulating material or air is affected by a certain live working method, a protective gap can be used to reduce the probability of operating overvoltage flashover in the working area to provide protection. The protective gap can be installed at the end of the live electric component on which it is working, or on both sides. 7
SY5856—93
11.2 The grounding wire of the protective gap should be a multi-strand soft hook wire. Its cross-section should meet the requirements of the grounding short-circuit capacity, but the minimum should not be less than 25mm.
11.3220kV arc-shaped protective gap, the gap distance is 0.7~~0.8m. 11.4 When using the protective gap, the following regulations should be observed. 11.4.1 Before hanging the protective gap, contact the power dispatcher and stop the reclosing switch. 11.4.2 When hanging a protective gap, it should be reliably grounded to the grounding grid, and then the protective gap should be hung on the conductor and make good contact. The removal procedure is the opposite. The distance between the protective gap lead and the human body should comply with the provisions of Table 1. 11.4.3 After the protective gap is hung, a special person should be assigned to guard it. In areas where people and animals pass, fences should be added. 11.4.4 Personnel who install and remove the protective gap should wear a full set of shielding clothing. 11.4.5 It is strictly forbidden to touch both ends of the protective gap with both hands at the same time to prevent melting and electric shock. 12
Low-voltage live work
Low-voltage live work should be supervised by a special person, use tools with insulated handles, stand on dry insulating materials when working, and wear safety helmets and gloves. Long-sleeved clothes must be worn when working, and it is strictly forbidden to use files, metal rulers, brushes with metal objects, and other tools such as brushes. The human body must not touch two wire ends at the same time to prevent the human body from being electrocuted. 12.2 When high and low voltage are installed on the same pole, when working on low voltage live lines, the distance from the high voltage line should be checked first, and insulation isolation measures should be taken to prevent accidental contact with live high voltage equipment. Workers shall not cross the low voltage live wires before insulation measures are taken. When working on live low voltage distribution equipment, insulation isolation measures should be taken to prevent phase-to-phase short circuit and single-phase grounding. 12.3 Before going up the pole, the live wire and the ground wire should be distinguished, and the working position should be selected. When disconnecting the wire, the live wire should be disconnected first, and then the ground wire. When splicing the wires, the order should be reversed.
13 Testing and storage of tools
13.1 Tools for live working must be kept by a designated person, registered and signed, and specific storage measures should be formulated. They should be regularly maintained, inspected and tested, and the test date and test data should be marked.
13.2 Insulated tools, instruments and insulating materials for live working should be stored in a special warehouse with good ventilation, equipped with infrared bulbs or dehumidification equipment, and kept clean and dry at all times.
13.3 White gloves should be worn when touching insulating tools to prevent erosion by sweat. Surface dust should be wiped with a clean towel. 13.4 Workers working with live wires must have special suits, which must not be exposed to moisture, impact, extrusion or wear during transportation. At the work site, workers working with live wires should be placed in order on clean artificial leather cloth. 13.6 The insulating part of the elevated insulated boom truck should have a moisture-proof cover and should be stored in a ventilated and dry garage. 13.6 The insulating cover for isolation should be subjected to a power frequency withstand voltage test every six months. The test voltage is shown in Table 17. Table 17
Voltage level of insulation cover
Rated voltage
Maximum working voltage
13.7 Electrical and mechanical tests should be carried out regularly on live working tools. The test cycle is: lmin power frequency test voltage
a. Electrical test, preventive test once a year, inspection test once a year, the interval between the two tests is year, b. Mechanical test, insulating tools once a year, metal tools once every two years. 8
13.8 Unqualified live tools are not allowed to be used. $Y 5856—93
13.9 The electrical test items and standards of insulating tools are shown in Table 18. Table 18
13.10 Provisions for voltage withstand test
Test length
13.10.1 The power frequency voltage withstand test is qualified if there is no breakdown, flashover or overheating. l min
Shanguang and type test
This test
13.10.2 The high-voltage electrode should use a metal tube with a diameter of not less than 30mm, and the test object should be suspended vertically. The distance between the grounding electrode and the ground is 1.0~1.2m. The grounding electrode and the electrode connected to the high voltage (when there is no metal) are wrapped with a 50mm wide metal pin. The distance between the test objects is not less than 500mm, the diameter of the equalizing ball on both sides of the single conductor is not less than 200mm, and the distance between the equalizing ball and the test object is not less than 1.5ml. The test object should be tested as a whole and shall not be destroyed. 13.11 The inspection test conditions of insulating tools are: the insulating tools are divided into sections for power frequency withstand voltage, and the withstand voltage is 75kV for every 300mm for 1min. It is qualified if there is no breakdown, flashover and overheating. 13.12 The water flushing work of the combined insulation should be carried out in the working state. In addition to the items and coordinated tests according to 18 (referring to voltage levels of 220kV and below), a power frequency leakage test is also added. The test voltage is shown in Table 19. The leakage current is not more than 1mA. The test time is 5min.
The water resistivity during the test is 15009·cm (suitable for voltage levels of 220kV and below). Zhang 19
Rated voltage, V
Test voltage, kv
13.13 Mechanical test standards for live working tools 35
13.13.1 The static load test should be carried out at 2.5 times the allowable working load for 5min. The tools without deformation and damage are qualified. 220
13.13.2 The dynamic load test should be carried out at 1.5 times the allowable working load. The tools should be operated three times according to the actual working state. The tools should be easy and flexible to operate and have no jamming phenomenon.
13.13.3 When shielding suits are used in summer, they should be cleaned with 60℃ warm water (the weight of shielding suits should be 1:50~1100) for 10 minutes every 10~~15 days, and then rinsed with clean water. The water bottle should be cleaned thoroughly. During the washing and decontamination process, rubbing is not allowed, and the washing material must be dried quickly with a fan. The resistance value between the farthest points of the shielding suit should not be greater than 52.13.13.4 The safety factor for the tensile force of the insulating rope should not be less than 5. Additional remarks:
This standard was proposed and approved by the Petroleum Industry Safety Professional Standardization Technical Committee. This standard was drafted by Shengli Petroleum Management Power Management Corporation. This standard mainly includes the following:2 Insulation tools, instruments and insulation materials for live working should be stored in a special warehouse with good ventilation, equipped with infrared bulbs or dehumidification equipment, and kept clean and dry at all times.
13.3 Wear white gloves when touching insulating tools to prevent sweat erosion. Wipe the surface dust with a clean towel. 13.4 Workers who work with live wires must have special suits, which must not be exposed to moisture, impact, extrusion or wear during transportation. At the work site, workers who work with live wires should be placed in order on clean and tidy artificial leather cloth. 13.6 The insulating part of the elevated insulated boom truck should have a moisture-proof cover and should be stored in a ventilated and dry garage. 13.6 The insulation cover for isolation should be subjected to a power frequency withstand voltage test once every six months. The test voltage is shown in Table 17. Table 17
Voltage level of insulation cover
Rated voltage
Maximum working voltage
13.7 Electrical and mechanical tests should be carried out regularly on live working tools. The test cycle is: lmin power frequency test voltage
a. Electrical test, preventive test once a year, inspection test once a year, the interval between the two tests is year, b. Mechanical test, insulating tools once a year, metal tools once every two years. 8
13.8 Unqualified live tools are not allowed to be used. $Y 5856—93
13.9 The electrical test items and standards of insulating tools are shown in Table 18. Table 18
13.10 Provisions for voltage withstand test
Test length
13.10.1 The power frequency voltage withstand test is qualified if there is no breakdown, flashover or overheating. l min
Shanguang and type test
This test
13.10.2 The high-voltage electrode should use a metal tube with a diameter of not less than 30mm, and the test object should be suspended vertically. The distance between the grounding electrode and the ground is 1.0~1.2m. The grounding electrode and the electrode connected to the high voltage (when there is no metal) are wrapped with a 50mm wide metal pin. The distance between the test objects is not less than 500mm, the diameter of the equalizing ball on both sides of the single conductor is not less than 200mm, and the distance between the equalizing ball and the test object is not less than 1.5ml. The test object should be tested as a whole and shall not be destroyed. 13.11 The inspection test conditions of insulating tools are: the insulating tools are divided into sections for power frequency withstand voltage, and the withstand voltage is 75kV for every 300mm for 1min. It is qualified if there is no breakdown, flashover and overheating. 13.12 The water flushing work of the combined insulation should be carried out in the working state. In addition to the items and coordinated tests according to 18 (referring to voltage levels of 220kV and below), a power frequency leakage test is also added. The test voltage is shown in Table 19. The leakage current is not more than 1mA. The test time is 5min.
The water resistivity during the test is 15009·cm (suitable for voltage levels of 220kV and below). Zhang 19
Rated voltage, V
Test voltage, kv
13.13 Mechanical test standards for live working tools 35
13.13.1 The static load test should be carried out at 2.5 times the allowable working load for 5min. The tools without deformation and damage are qualified. 220
13.13.2 The dynamic load test should be carried out at 1.5 times the allowable working load. The tools should be operated three times according to the actual working state. The tools should be easy and flexible to operate and have no jamming phenomenon.
13.13.3 When shielding suits are used in summer, they should be cleaned with 60℃ warm water (the weight of shielding suits should be 1:50~1100) for 10 minutes every 10~~15 days, and then rinsed with clean water. The water bottle should be cleaned thoroughly. During the washing and decontamination process, rubbing is not allowed, and the washing material must be dried quickly with a fan. The resistance value between the farthest points of the shielding suit should not be greater than 52.13.13.4 The safety factor for the tensile force of the insulating rope should not be less than 5. Additional remarks:
This standard was proposed and approved by the Petroleum Industry Safety Professional Standardization Technical Committee. This standard was drafted by Shengli Petroleum Management Power Management Corporation. This standard mainly includes the following:2 Insulation tools, instruments and insulation materials for live working should be stored in a special warehouse with good ventilation, equipped with infrared bulbs or dehumidification equipment, and kept clean and dry at all times.
13.3 Wear white gloves when touching insulating tools to prevent sweat erosion. Wipe the surface dust with a clean towel. 13.4 Workers who work with live wires must have special suits, which must not be exposed to moisture, impact, extrusion or wear during transportation. At the work site, workers who work with live wires should be placed in order on clean and tidy artificial leather cloth. 13.6 The insulating part of the elevated insulated boom truck should have a moisture-proof cover and should be stored in a ventilated and dry garage. 13.6 The insulation cover for isolation should be subjected to a power frequency withstand voltage test once every six months. The test voltage is shown in Table 17. Table 17
Voltage level of insulation cover
Rated voltage
Maximum working voltage
13.7 Electrical and mechanical tests should be carried out regularly on live working tools. The test cycle is: lmin power frequency test voltage
a. Electrical test, preventive test once a year, inspection test once a year, the interval between the two tests is year, b. Mechanical test, insulating tools once a year, metal tools once every two years. 8
13.8 Unqualified live tools are not allowed to be used. $Y 5856—93
13.9 The electrical test items and standards of insulating tools are shown in Table 18. Table 18
13.10 Provisions for voltage withstand test
Test length
13.10.1 The power frequency voltage withstand test is qualified if there is no breakdown, flashover or overheating. l min
Shanguang and type test
This test
13.10.2 The high-voltage electrode should use a metal tube with a diameter of not less than 30mm, and the test object should be suspended vertically. The distance between the grounding electrode and the ground is 1.0~1.2m. The grounding electrode and the electrode connected to the high voltage (when there is no metal) are wrapped with a 50mm wide metal pin. The distance between the test objects is not less than 500mm, the diameter of the equalizing ball on both sides of the single conductor is not less than 200mm, and the distance between the equalizing ball and the test object is not less than 1.5ml. The test object should be tested as a whole and shall not be destroyed. 13.11 The inspection test conditions of insulating tools are: the insulating tools are divided into sections for power frequency withstand voltage, and the withstand voltage is 75kV for every 300mm for 1min. It is qualified if there is no breakdown, flashover and overheating. 13.12 The water flushing work of the combined insulation should be carried out in the working state. In addition to the items and coordinated tests according to 18 (referring to voltage levels of 220kV and below), a power frequency leakage test is also added. The test voltage is shown in Table 19. The leakage current is not more than 1mA. The test time is 5min.
The water resistivity during the test is 15009·cm (suitable for voltage levels of 220kV and below). Zhang 19
Rated voltage, V
Test voltage, kv
13.13 Mechanical test standards for live working tools 35
13.13.1 The static load test should be carried out at 2.5 times the allowable working load for 5min. The tools without deformation and damage are qualified. 220
13.13.2 The dynamic load test should be carried out at 1.5 times the allowable working load. The tools should be operated three times according to the actual working state. The tools should be easy and flexible to operate and have no jamming phenomenon.
13.13.3 When shielding suits are used in summer, they should be cleaned with 60℃ warm water (the weight of shielding suits should be 1:50~1100) for 10 minutes every 10~~15 days, and then rinsed with clean water. The water bottle should be cleaned thoroughly. During the washing and decontamination process, rubbing is not allowed, and the washing material must be dried quickly with a fan. The resistance value between the farthest points of the shielding suit should not be greater than 52.13.13.4 The safety factor for the tensile force of the insulating rope should not be less than 5. Additional remarks:
This standard was proposed and approved by the Petroleum Industry Safety Professional Standardization Technical Committee. This standard was drafted by Shengli Petroleum Management Power Management Corporation. This standard mainly includes the following:
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