**I. Management Regulations**
According to the Q/GDW 168-2008 "Power Transmission and Transformation Equipment Condition Inspection and Maintenance Test Regulations," professional inspections are required every six months. This ensures that all electrical equipment is functioning properly and safely, reducing the risk of unexpected failures or accidents.
**II. Inspection Items and Standards**
1. **Inspection of SF6 Closed Combined Electrical Equipment (GIS)**
The inspection follows the items and standards listed in Table 3-6-5. These include checking for gas pressure, insulation resistance, and signs of leakage. Regular checks help maintain the integrity of the system and ensure long-term performance.
2. **SF6 Circuit Breaker Inspection**
This inspection is carried out based on the requirements outlined in Table 3-6-6. It involves checking the gas pressure, mechanical operation, and contact resistance. Ensuring the proper function of circuit breakers is crucial for system reliability.
3. **Oil Circuit Breaker Inspection**
As per Table 3-6-7, this includes checking oil levels, insulation resistance, and the condition of contacts. Proper maintenance helps avoid breakdowns and extends the life of the equipment.
4. **Vacuum Circuit Breaker Inspection**
According to Table 3-6-8, the inspection focuses on vacuum interrupter condition, contact wear, and operating mechanism functionality. These checks are essential for maintaining safe and efficient operation.
5. **High-Voltage Switchgear Inspection**
The inspection follows the guidelines in Table 3-6-9. It includes checking for overheating, abnormal noises, and insulation issues. This ensures that the switchgear operates safely under various conditions.
6. **Hydraulic Operating Mechanism Inspection**
Based on Table 3-6-10, the inspection involves checking hydraulic fluid levels, valve operations, and pressure. A well-maintained hydraulic system is vital for reliable circuit breaker performance.
7. **Patrol Inspection of the Yellow Body (Main Transformer)**
This inspection is performed according to Table 3-6-11. It includes checking for oil leaks, temperature, and vibration. Monitoring the main transformer is key to preventing major power outages.
8. **Electromagnetic Operating Mechanism Inspection**
As outlined in Table 3-6-12, this involves testing coil resistance, magnetic attraction, and mechanical movement. A properly functioning mechanism ensures quick and accurate operation during faults.
9. **Pneumatic Inspection**
This follows the procedures in Table 3-6-13, including checking air pressure, valve functions, and cylinder movements. Pneumatic systems are often used in remote control applications and must be reliable.
**III. Inspection Methods and Precautions**
(1) Always carry a patrol logbook and follow the designated inspection route to ensure no equipment is missed.
(2) Before starting the inspection, familiarize yourself with the equipment’s load distribution and current status to identify potential issues.
(3) Wear a safety helmet when entering the production area to comply with the “two wears and one wear†rule, ensuring personal protection.
(4) During the inspection, perform the “four fine†checks: look carefully, listen closely, smell for unusual odors, and touch only non-heated parts. Follow the equipment's operation manual strictly.
(5) Report any defects or abnormalities immediately, classify them, and record them thoroughly in the logbook. Inform the relevant department and dispatch center as needed.
(6) If a serious threat to personnel or equipment safety is detected during the inspection, handle it according to the accident response procedures.
(7) Carry professional tools such as an infrared thermal imager, multimeter, telescope, portable oxygen meter, and SF6 gas leak detector to assist in accurate and efficient inspections.
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