Thunderstorm Day
Hazard Points
- Lightning rod drop and back - strike injuring people
- Arrester explosion injuring people
- Outdoor terminal box and gas relay getting rainwater
Control Measures
- Wear qualified insulating boots and stay at least 5m away from the lightning rod.
- Wear safety helmets properly and do not approach arresters to check action values.
- Keep terminal boxes and mechanism box doors tightly closed, and ensure the gas - proof rain shields are in good condition.
- Prohibit holding umbrellas when patrolling high - voltage equipment in thunderstorm weather.
Foggy Day
Hazard Points
- Sudden equipment pollution flashover (fog flashover) and grounding injuring people
- Reduced air insulation level, prone to discharge
- Low visibility leading to straying into non - safety areas
Control Measures
- Should patrol in insulating boots.
- When arranging measures or patrolling equipment outdoors, refrain from raising hands.
- Be cautious and careful during patrol.
Icy and Snowy Day
Hazard Points
- Snow melting and dampness in terminal boxes and mechanism boxes, DC grounding or protection malfunction
- Excessively low temperature in battery rooms, unable to work normally
- Slippery patrol paths, prone to falling and straying into snow - covered pits
- Snow on equipment falling and injuring people
- Slipping and falling when going up and down outdoor stairs
Control Measures
- Check that box doors are closed well. If damp, immediately use a hot air blower for drying treatment.
- Keep doors and windows tightly closed, and the temperature should not be lower than the specified value.
- Wear insulated rubber shoes, walk slowly, and clear snow in a timely manner.
- Wear cotton safety helmets.
- Clear snow in a timely manner and hold handrails to walk slowly.
Night
Hazard Points
- Low visibility at night, prone to causing injuries.
- During patrol after a power grid strike, incorrect power transmission may easily lead to electric shock to personnel.
- Uneven patrol path covers, risk of slipping and falling into empty spaces, resulting in contusions and sprains.
Control Measures
- Use lighting batteries with qualified illuminance, and have two people conduct patrol simultaneously, looking out for each other.
- Before patrolling and inspecting after a power grid strike, hang a "No Closing, Personnel Working" sign on the operating handle of the power isolation switch, or have a dedicated person guard it to prevent incorrect power transmission.
- Carefully inspect. The covers should be flat and without movement to ensure walking safety during night patrols.
Hot Weather
Hazard Points
- The oil level of oil - filled equipment rises, and the internal pressure increases, causing oil spraying and serious oil leakage.
- Abnormal oil pressure of the hydraulic mechanism, and the circuit breaker cannot operate safely and reliably.
Control Measures
- Monitor the change of the oil level. If necessary, request to stop the power and adjust the oil level.
- Monitor that the pressure does not exceed the limit pressure. Manually release the pressure completely, and establish a dedicated record for monitoring and analysis.
Flood Season
Hazard Points
There is accumulated water on the site operating platform and patrol path, threatening the safety of operators.
Control Measures
- Do a good job in pavement drainage, dredge the drainage pipes, and prepare flood - discharge water pumps to ensure they are available at any time.
- Promptly remove the accumulated water on the operating platform. When contacting the equipment, you must wear insulating boots and insulating gloves.
System Grounding
Hazard Points
- Resonance caused by grounding faults is likely to cause PT explosion.
- Step voltage and contact voltage generated at the grounding point may injure people.
Control Measures
- When inspecting the equipment in the station, wear a safety helmet well to prevent injury from explosion fragments. At the same time, stay away from PT.
- During patrol, wear insulating boots and insulating gloves, and keep a distance of more than 8m from the grounding point.
CT Open - Circuit
Hazard Points
CT explosion injures people.
Control Measures
- Wear insulating boots, safety helmets, and insulating gloves.
- Handle it with people simultaneously.
Unusual Sound of Oil - Filled Equipment
Hazard Points
- Equipment explosion injures people.
- Splashed oil catches fire and injures people.
Control Measures
Wear a safety helmet well during patrol, and it should be carried out by 2 people simultaneously.
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