Explosion-proof electrical equipment or lines cannot be powered off but must be repaired on equipment or lines. When working with electricity, pay attention to the following safety precautions.
Other live conductors and grounded objects that may be touched during work are isolated or kept at a sufficient safety distance with insulators or mesh barriers to prevent short circuit or short-circuit to ground.
When carrying out live work on 380/220V electrical equipment or lines, the phase (live) and neutral (earth) lines should be measured with an electroscope (test pencil). Only one wire may be touched at any time during work, and two wires may not be touched at the same time. When connecting or splicing wires, 'disconnect the phase before disconnecting the neutral wire.
Use a variety of electrical safety appliances. Electrical safety appliances are tools and appliances that are necessary to protect the safe operation and personal safety of electrical work. They can ensure safety and prevent accidents such as electric shocks and arc burns. Commonly used safety appliances include insulated rods, insulated clamps, test pencils, rubber insulation mats or insulation tables, insulated shoes, insulated boots and insulated gloves, portable grounding wires, and warning signs. Safety equipment should be kept in custody at ordinary times, and tools must not be used instead of each other; they must not be placed in a mixed manner; they must not be exposed to moisture and dirt; pay attention to dryness and ventilation. Various different safety appliances should also be stored according to their own characteristics, such as insulation rods should be hung on the support, and should not be in contact with the ground.
Before using safety equipment, check it carefully and confirm that its voltage rating is consistent with the equipment's voltage rating and is indeed good. Safety equipments are regularly inspected and tested in various regulations to ensure that each tool is used within the test pass period.
Ground or zero the metal enclosure (or base) of the explosion-proof electrical equipment. Electrical insulation damage may occur due to insulation aging, overvoltage breakdown, or wear of electrical equipment. At this time, contact between the conductor and the device shell will cause the original metal shell that should not be charged to be live. If people touch these unexpected abnormal electrification parts, electric shock accidents will occur. In order to prevent such accidents from occurring, the metal housing (or base) of the electrical equipment is usually grounded (or connected to zero) as a protective measure.
Install a low voltage electric shock protector. Low-voltage electric shock protector is a device that can effectively prevent electric shock and protect equipment in low-voltage electric equipment. After the low-voltage electric shock protector is installed, the electric power can be automatically cut off when an electric shock or electric leakage occurs. This not only protects personal safety, but also supervises the insulation of the equipment.
Uninterrupted maintenance work is carried out in industrial enterprises mainly in the vicinity of live equipment or on the outer shell; in the electric sector, there are also factory work performed directly on charged live parts, such as working with insulated rods, etc. , charged with water rinse. Non-stop maintenance work must strictly implement the monitoring system; must ensure a sufficient safety distance, and live parts can only be located on the side of maintenance personnel; non-blackout maintenance work time should not be too long, so as to avoid maintenance personnel distraction and accident; not blackout The tools used for inspection and overhaul shall be inspected and tested; the maintenance personnel shall be trained rigorously to master the technology of maintenance without interruption.
Other live conductors and grounded objects that may be touched during work are isolated or kept at a sufficient safety distance with insulators or mesh barriers to prevent short circuit or short-circuit to ground.
When carrying out live work on 380/220V electrical equipment or lines, the phase (live) and neutral (earth) lines should be measured with an electroscope (test pencil). Only one wire may be touched at any time during work, and two wires may not be touched at the same time. When connecting or splicing wires, 'disconnect the phase before disconnecting the neutral wire.
Use a variety of electrical safety appliances. Electrical safety appliances are tools and appliances that are necessary to protect the safe operation and personal safety of electrical work. They can ensure safety and prevent accidents such as electric shocks and arc burns. Commonly used safety appliances include insulated rods, insulated clamps, test pencils, rubber insulation mats or insulation tables, insulated shoes, insulated boots and insulated gloves, portable grounding wires, and warning signs. Safety equipment should be kept in custody at ordinary times, and tools must not be used instead of each other; they must not be placed in a mixed manner; they must not be exposed to moisture and dirt; pay attention to dryness and ventilation. Various different safety appliances should also be stored according to their own characteristics, such as insulation rods should be hung on the support, and should not be in contact with the ground.
Before using safety equipment, check it carefully and confirm that its voltage rating is consistent with the equipment's voltage rating and is indeed good. Safety equipments are regularly inspected and tested in various regulations to ensure that each tool is used within the test pass period.
Ground or zero the metal enclosure (or base) of the explosion-proof electrical equipment. Electrical insulation damage may occur due to insulation aging, overvoltage breakdown, or wear of electrical equipment. At this time, contact between the conductor and the device shell will cause the original metal shell that should not be charged to be live. If people touch these unexpected abnormal electrification parts, electric shock accidents will occur. In order to prevent such accidents from occurring, the metal housing (or base) of the electrical equipment is usually grounded (or connected to zero) as a protective measure.
Install a low voltage electric shock protector. Low-voltage electric shock protector is a device that can effectively prevent electric shock and protect equipment in low-voltage electric equipment. After the low-voltage electric shock protector is installed, the electric power can be automatically cut off when an electric shock or electric leakage occurs. This not only protects personal safety, but also supervises the insulation of the equipment.
Uninterrupted maintenance work is carried out in industrial enterprises mainly in the vicinity of live equipment or on the outer shell; in the electric sector, there are also factory work performed directly on charged live parts, such as working with insulated rods, etc. , charged with water rinse. Non-stop maintenance work must strictly implement the monitoring system; must ensure a sufficient safety distance, and live parts can only be located on the side of maintenance personnel; non-blackout maintenance work time should not be too long, so as to avoid maintenance personnel distraction and accident; not blackout The tools used for inspection and overhaul shall be inspected and tested; the maintenance personnel shall be trained rigorously to master the technology of maintenance without interruption.
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