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The inspection system of high and low voltage distribution rooms

1. When inspecting high-voltage equipment, keep a distance from charged objects. When the voltage level is 10KV, the distance between the human body and the charged object shall not be less than 0.4M and the distance between the sky barrier and the charged object shall not be less than 0.7M;

2. When encountering thunderstorms and ground faults, consider the step voltage, wear insulating shoes, and stay away from the ground point;

3. When inspecting equipment, defects found are generally not dealt with. As long as you find a problem, report it in time, don't take care of it alone;

4. Measures to be taken during equipment inspection:

1) Listen: mainly listen to whether the sound of the equipment is running normally;

2) Look: Mainly check whether there are any abnormalities in the appearance and color changes of the equipment, and whether there are any abnormal changes in the digital display of the instrument;

3) Smell: Mainly smell whether there is any abnormality in the insulation material when the temperature rises There is a burning smell;

4) Check whether there are traces of small animal movement, rain leakage, or water intrusion;

5) Check whether the current, voltage, and temperature are normal;

High and low voltage safe operation rules and regulations

In order to ensure the safe and accident-free operation of the substation and distribution room and to ensure personal safety, staff must strictly abide by technical measures and organizational measures.

1. Safety technical measures

Power outage: All power sources must be safely cut off, with at least one obvious disconnect point. Transformers and mutual inductors related to the equipment must be on both sides. All disconnect to prevent reverse power transmission.

Electrical test: A qualified electroscope with appropriate voltage level must be used to conduct a phase-by-phase electrical test on both sides of the incoming and outgoing lines of the equipment to be inspected.

After installing the ground wire and checking the electricity, immediately short-circuit the three-phase grounding. No isolating switch, circuit breaker, fuse and other electrical components should be installed between the ground wire and the maintenance part.

Install barriers and hang "Stop, High Voltage Danger" signs. Install temporary barriers within the blackout area to isolate live equipment, and hang prohibitive signs such as "Stop, High Voltage Danger".

2. Safety organizational measures

1) Work ticket system

When working on electrical equipment, you should fill in a work ticket or follow orders. The work content is carried out by verbal or telephone orders. The orders must be correct and clear. The on-duty staff should record the person who issued the work, the person in charge and the work tasks in detail and read them back to the person who sent them for verification. The work ticket is issued by the company leader and the community engineering department.

2) Work permit system

Go to the site with the person in charge of the work to re-check the safety measures taken, and test the equipment with your hands to prove that there is indeed no voltage in the maintenance equipment.

Indicate the location and precautions of live equipment to the person in charge of the work.

Both the person in charge of the work and the person in charge of the work shall sign on the work ticket respectively.

Both the person responsible for the work and the person permitting the work shall not change the safety measures without authorization, and the personnel on duty shall not change the operation and wiring methods of the maintenance equipment, otherwise the consent of both parties is required.

3.) Work guardianship system

Work guardians must always be at the operation site, carefully supervise the safety of work shift personnel, and promptly correct actions that violate safety to ensure safe operations.

When a guardian leaves his post, a competent person should be designated as a temporary replacement. If the guardian leaves for a long time, the original issuer of the work ticket should be replaced by a new person in charge.

If the person on duty discovers that staff members violate safety regulations or in any situation that endangers personnel safety, they should provide correction suggestions to the person in charge of the work. If necessary, they can temporarily stop work and report to their superiors.

4) Work interruption, transfer and termination system

When work interruptions (lunch break, meal break, get off work off work) or thunderstorms threaten the safety of staff, all staff should evacuate the site, At the same time, all safety measures remain unchanged and work tickets are still kept by the person in charge of the work. When continuing to work after an interruption, there is no need to go through the work permit holder. Work is completed every day, and the work ticket should be returned to the on-duty officer to resume work the next day. The permission of the on-duty officer should be obtained. The work ticket should be retrieved and the guardian should re-check before starting work. The attendant shall not close the construction equipment and send power before the work ticket is processed and completed. If there is an emergency need, the attendant can close the switch and send power without withdrawing the work ticket, but this must be done after getting a reply from the person in charge of the engineering department that power can be sent.

Before the maintenance is completed, the voltage should be added, all staff should be allowed to evacuate the site, all work tickets for the system should be recovered, temporary barriers, grounding wires and signboards should be removed, permanent barriers should be restored, and the work leader and on-duty personnel should conduct a comprehensive inspection to ensure there are no errors. , pressure test by the attendant. After all work is completed, check whether the number of removed grounding groups is the same as the number of attached groups. Check whether the opening and closing position of the grounding isolating switch matches the work ticket. Whether the temporary barriers installed and signs have been removed, and whether the permanent barriers have been restored. Check whether the opening and closing positions of all circuit breakers and isolating switches are consistent with the positions specified in the work ticket, and whether there are any missing accessories, tools, materials, etc. on the equipment. After re-examination with the attendant, both parties sign on the work ticket to terminate the work ticket. Only after obtaining the permission order from the on-duty dispatcher or on-duty person-in-charge can the switch be closed and power is supplied.

High and low voltage operating procedures and standards

1. No matter if a power outage or trip occurs at any time, the personnel on duty must restore the system power supply in the shortest possible time;

< p>2. When the power supply equipment is in normal operation, any switching operation (power outage) must be reported to the department leader, and it can be implemented only with the consent of the department leader. It is strictly prohibited for the personnel on duty to make the switching operation (power outage) without permission;

3. All switching operation procedures must fill in the operation ticket and record it in detail on the duty record;

4. Switching operation procedures:

1) Power outage Operating procedures: low voltage first, then high voltage; load first, then power supply; first electrolyzer, then load;

2) Power transmission operating procedure: first high voltage, then low voltage; first power supply, then load; first load, then electrolyzer .

5. It is strictly forbidden to stop the power supply operation with load;

6. In order to prevent accidents, when the low-voltage side branch circuit breaker is closed and the power is sent, it is strictly prohibited to close and send power at one time. The switch should be opened and closed more than twice quickly before power is supplied;

Daily inspection standards for power distribution rooms

1. When inspecting high-voltage equipment, keep a distance from live objects. When the voltage level is At 10KV, the distance between the human body and the electrified body is not less than 0.4M and the distance between the sky barrier and the sky barrier is not less than 0.7M;

2. When encountering thunderstorms and ground faults, the step voltage must be considered and insulating shoes must be worn. And be farther away from the grounding point;

3. When inspecting equipment, defects found are generally not dealt with. As long as problems are found, report them in time and do not deal with them alone;

4. Equipment inspections adopt Measures:

1) Listen: mainly listen to whether the sound of the equipment is normal;

2) Look: mainly check whether the appearance and color changes of the equipment are abnormal, and whether the instrument digital display is normal No abnormal changes;

3) Smell: mainly smell the burning smell of insulation materials when the temperature rises;

4) Check whether there are traces of small animal movement or rain leakage , water ingress;

5) Check whether the current, voltage, and temperature are normal;

5. Keep the equipment clean, the machine room clean, and prevent foreign matter from causing poor contact or short circuit;

6. Check whether various instrument indicators, energy storage indicators, and operation instructions are intact;

7. Check whether the secondary control circuit contacts in each instrument room are loose and carbonized;

< p>8. Observe the contacts of each incoming line cabinet, outgoing line cabinet, voltage (current) transformer, and lightning arrester for traces of arc flashover and ignition;

9. Observe the PT cabinet line voltage box Whether the voltage display is normal, and whether each high-voltage live display device is intact;

10. Check whether the DC panel operating power supply voltage (not less than 220V) is normal, whether the battery is ruptured, leaking, and whether the contacts are loose , whether the melting wire is intact;

11. Observe the high and low voltage contacts of each transformer to see if there are traces of arc flashover and ignition. Listen to the transformer for any abnormal sounds. Observe the temperature rise of the transformer. If necessary, manually Start the fan to force cooling;

12. Check whether the transformer cooling fan is operating normally, monitor whether the transformer is running at rated (current), and whether the deviation value is within the allowable range;

13. Turn on Observe whether there are discoloration, bulges and other abnormal phenomena on the high and low voltage sides of the transformer windings;

14. Check whether the low-side voltage display of each transformer is normal and whether the three-phase current is balanced;

15 . Check whether the primary melting wire, secondary melting wire, and contactor of the electrolytic compensation cabinet are intact, and whether the electrolytic melter contacts are loose, abnormal, or swollen;

16. Check each load metering device Whether the operation is normal, whether the contacts are loose or carbonized;

17. Check whether the contacts of each load outlet are loose, discolored, or sparking, and whether the temperature rise is normal;

18 . Check whether the lighting emergency device (rechargeable battery part) is intact;

19. Check the zero connection or grounding device once a year. The grounding resistance value should be within the qualified value range required by the "Electrical Regulations";

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20. Inspection and inspection of high-voltage electrical equipment, lightning protection devices, relay protection and automatic devices shall be carried out in accordance with the cycles and standards specified in the "Electrical Regulations".

Power distribution room equipment maintenance procedures and standards

1. Equipment and lines that require power outage maintenance must be reported to the department leader for approval before implementation;

2. Power distribution equipment is divided into monthly maintenance, quarterly maintenance and annual maintenance;

3. Daily inspections and annual maintenance of running power distribution equipment are carried out;

4. To ensure normal maintenance and personal safety, safety technical measures and organizational measures must be strictly implemented;

5. Safety technical measures:

1) During a power outage, all power supplies must be safely shut down. , there is at least one obvious disconnection point. The transformers and mutual inductors related to the equipment must be disconnected on both sides to prevent reverse power transmission;

2) The power test must use a qualified and appropriate voltage level tester. For electrical appliances, conduct phase-based electrical tests on both sides of the equipment to be repaired or maintained;

3) Install a grounding wire and immediately short-circuit the three-phase ground to the ground after the electrical test. There should be no connection between the grounding wire and the maintenance part. Install isolating switches, circuit breakers, fuses and other electrical components;

4) Install barrier barriers to "stop, high voltage danger" and install monitoring barriers within the power outage range to isolate live equipment. And hang signs such as "Stop, High Voltage Danger";

6. Safety Organization Measures:

1) Work Ticket System;

2) Work Permit System ;

3) Work supervision system;

4) Work interruption, transfer and termination system;

7. Personnel should deal with the electrical and mechanical connections of power distribution equipment. Familiar with the lock situation and able to operate it;

8. Detailed records and archives of the contents of the power distribution equipment being overhauled;

9. Routine maintenance work includes:

① Various measuring instruments and safety appliances, etc., should be inspected regularly every year according to regulations;

② In addition to maintenance and repair according to regulations, transformers should also be inspected annually according to the industry management requirements of the power supply company; < /p>

③ The grounding resistance test of the power supply system grounding network and lightning protection grounding system is conducted once a year;

④ The backup generator set is tested regularly every month;

⑤ Emergency lighting fixtures should be charged and discharged according to product characteristics and indicators to maintain good working condition;

⑥ High and low voltage power distribution equipment should undergo first-level maintenance every 1-2 years;

⑦ Others Electrical equipment should be repaired and maintained according to inspection conditions;

⑧The power supply and distribution equipment screens and machine rooms should be cleaned daily every shift.

Operating procedures and standards for fires in the distribution room

1. When a fire occurs in the distribution room, the personnel on duty should immediately organize self-rescue and notify the fire control center and department leaders by phone;

2. After a fire breaks out in the power distribution room, in order to ensure personal safety and prevent the risk of personal electric shock, the power supply should be cut off as soon as possible. When cutting off the power supply, the following points should be noted:

1 ) After a fire occurs, the insulation of electrical equipment in the fire scene may be reduced or damaged due to smoke and fire. During a power outage, safety technical measures should be taken first, including wearing insulating gloves and shoes, and using insulating tools with qualified voltage levels; < /p>

2) A power outage should be carried out according to the order of switching operations: load first, then power supply, first low voltage, then high voltage;

3) The location of cutting off the power supply should be appropriate so as not to affect the fire-fighting work; < /p>

4) When a fire breaks out at night, when the power is cut off, lighting must be monitored to facilitate the fight;

5) When the power supply bureau needs to cut off the power, the power supply bureau should be contacted by phone quickly to explain the situation; < /p>

3. Safety technical requirements for live fire extinguishing:

1) Electrical fire extinguishers should be used;

2) Fire fighting personnel or fire equipment used should be kept away from live parts. Sufficient safety distance, 10KV power supply is not less than 0.4M;

3) When extinguishing fires on high-altitude equipment, the elevation angle between the human body and the live body should not be greater than 45 degrees, and stand outside the equipment to prevent falling Causing electric shock injuries;

4) When a fire breaks out in high-voltage electrical equipment and lines, rescuers must wear insulating shoes and insulating gloves when rescuing people indoors;

5) Use spray water guns When putting out a fire, you should wear insulating shoes and gloves. Firefighters who do not wear insulating shoes should prevent electric shock due to conductive water stains on the ground.

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Transformation and distribution electrician handover system

1. Before handing over the shift, the electrician must do routine maintenance and inspection of the power transformation and distribution equipment and facilities, and carefully fill out the "Transformation and Distribution Electrician Handover System" as required. Daily Operation Report of Power Transformation and Distribution Equipment";

2. Before handing over the shift, the electrician who takes over the shift must not only record the problems existing in the operation of the equipment in the "Daily Report of Operation of Power Transformation and Distribution Equipment", but must also report them to the successor or The team leader gives a detailed explanation orally;

3. When taking over the shift, the taking over electrician must first carefully check the contents of the "Daily Operation of Power Transformation and Distribution Equipment" and the "Electrician Handover Book", and check the power transformation and distribution equipment. The operating conditions, especially when the power distribution equipment is damaged or abnormal, must be understood in detail, and if necessary, both parties taking over the shift will go to the site to explain;

4. Before the shift is handed over, the shift personnel must complete the work according to regulations Cleaning and sanitation of the work site and duty room;

5. After both parties sign the handover column in the "Power Transformation and Distribution Equipment Operation Daily", both parties will complete the handover work. The handover work must be serious and conscientious to ensure the safety and reliability of the power supply;

6. When the taking over electrician fails to take over on time, the taking over electrician shall not leave, otherwise the taking over electrician shall bear the responsibility;

7. The "Power Transformation and Distribution Equipment Operation Daily" should be placed in the designated place and cannot be lost. The foreman is responsible for binding and filing every month for future reference;

8. Shift handover work is included in the scope of individual monthly responsibility assessment.

Safety management system for high and low power distribution rooms

1. The substation and distribution rooms should be equipped with various safety equipment, namely: high-voltage test pens, insulating rubber gloves, insulating boots, and insulating mats , temporary grounding wires, signs and fire-fighting equipment.

2. Insulated high-voltage supplies must undergo voltage withstand tests regularly to ensure safety and reliability.

3. The power substation and distribution room should be cleaned on time, and piles of objects in indoor and outdoor passages are strictly prohibited to maintain environmental sanitation.

4. Carry out inspections and maintenance in strict accordance with the various items specified in the "Daily Report of Operation of Power Transformation and Distribution Equipment", and perform regular maintenance of various equipment in the power transformation and distribution room according to the first and second level equipment maintenance plans. Work.

5. Frequently take the initiative to contact the power supply department to learn about the operation of the power supply network in a timely manner.

6. Strictly implement the relevant rules and regulations of the power transformation and distribution room. Non-electricians or unrelated personnel are not allowed to enter the power transformation and distribution room without permission. Outsiders must go through registration procedures when entering or leaving the power transformation and distribution room for business.

7. Workers must close the door when entering or exiting the substation to prevent small animals from intruding.

8. More than two people are required to perform various operations in the power transformer and distribution room.

The substation operating personnel are “three familiar” and “three capable”

“Three familiar”: familiar with the equipment, system and its basic principles;

Familiar with the operation and Accident handling;

Be familiar with the rules and regulations of this position.

"Three Abilities": Ability to analyze operating conditions;

Ability to detect and eliminate faults in a timely manner;

Ability to master general maintenance skills.

Electrical accident handling system

1. Emergency measures for large-area power outages:

(1) When encountering a large-area power outage, you should first remain calm and calm While thinking carefully, carefully analyze the cause of the accident and report it to the relevant superiors immediately;

(2) Develop safety measures and be prepared to deal with emergency failures;

(3) ) Handle the power outage accident, and try to send power again after confirming that the treatment has been completed;

(4) Analyze the cause and characteristics of the accident, make a summary, and keep records for the record.

2. Handling of major equipment failures:

(1) When encountering major equipment failures, you should first keep a calm mind, carefully analyze the causes of major accidents, and Immediately report to the relevant superior supervisor;

(2) Take safety measures and make preparations for emergency troubleshooting;

(3) After an emergency occurs, all ventilation should be turned on immediately System, and wear gas masks or oxygen respirators according to the accident situation to enter the scene for processing;

(4) Handle the power outage accident, and try to send power again after confirming that the processing has been completed;

(5) After the accident is handled, all protective equipment should be cleaned and the staff should take a shower;

(6) Analyze the cause and characteristics of the accident, make a summary, and keep records for the record.

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