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The ladder should be unlocked when the transformer is on.
True
False
False
It is strictly prohibited to have the ladder attached, unlocked, or accessible to a transformer while it is energized. This is a critical safety protocol to prevent electrocution, arc flash hazards, and accidental physical contact with high-voltage components.
It is strictly prohibited to have the ladder attached, unlocked, or accessible to a transformer while it is energized. This is a critical safety protocol to prevent electrocution, arc flash hazards, and accidental physical contact with high-voltage components.
S=VтЛЕI тАФ Apparent power rating of the transformer
dminтАЛтИЭV тАФ Minimum safety clearance distance increases with voltage level
Transformers operate at high potentials. To ensure worker safety during maintenance or physical access, the 'lock-out/tag-out' (LOTO) procedure requires the unit to be completely de-energized, isolated from the grid, and grounded. A ladder left unlocked or near an energized transformer invites unauthorized or unsafe access, violating OSHA and Indian Electricity Rules regarding clearance distances.
Energized transformers produce strong electromagnetic fields and carry lethal voltages.
LOTO (Lock-Out Tag-Out) is mandatory before any maintenance activity.
Ladders must be made of non-conductive material (e.g., fiber-reinforced plastic) even for work on de-energized equipment.
Physical barriers prevent accidental entry into the 'danger zone' of the transformer bay.
Prevents fatal electrical shock accidents.
Reduces the risk of inadvertent contact with bushings or live parts.
Substation maintenance
Transformer inspection protocols
Industrial safety management
According to the Indian Electricity Rules, specific clearance distances must be maintained from live parts based on the voltage rating.
Option B is correct because the ladder represents a potential path for a person to reach live terminals, which is life-threatening if the transformer is ON.
B is correct тАФ The ladder must be removed or strictly secured to prevent unauthorized access to an energized transformer, which poses a severe risk of electric shock.
Always remember that in electrical systems, safety protocols like LOTO take precedence over operational convenience; never assume a 'safe' distance while a transformer is energized.