HARYANA: An investigation into a technical fault in a 66 kV power line in Gurugram has revealed a surprising finding. The probe discovered that the power line’s conductor was damaged and broken internally, even though the outer layer appeared normal and intact. Consequently, the true cause of the fault could not be identified during the initial inspection.
According to electricity department officials, this issue came to light following a detailed technical investigation. Repair and technical testing of the affected line are currently underway to prevent such problems from recurring in the future.
How was the technical fault discovered?
Reportedly, the technical team began inspecting the 66 kV transmission line after experiencing power supply interruptions and detecting abnormal signals from the line. While the conductor’s outer surface initially appeared normal, a detailed examination and testing revealed that the internal metal core was damaged.
Experts state that such internal damage is not always detectable through routine visual inspections and requires the use of specialized testing techniques.
How can it be fine on the outside but damaged on the inside?
Conductors used in power transmission lines consist of multiple layers. Over time—
continuous mechanical stress,
weather impact,
vibration,
excessive load,
metal fatigue,
or other technical factors
—can weaken the inner wires, while the outer aluminum layer continues to look normal. This is why the fault is often detected only through specialized testing equipment.
What was the impact on the power supply?
The technical fault disrupted the power supply in the affected area. The department attempted to restore supply through alternative arrangements and initiated repairs on the affected line.
Officials state that other critical transmission lines will also be inspected to prevent similar incidents in the future.
What aspects were emphasized during the investigation?
The technical team examined several factors, including—
the internal condition of the conductor;
metal strength and wear and tear;
load capacity; and
the impact of weather on the line. Condition of connections and joints.
Potential for future risks.
A plan for necessary repairs and maintenance is being prepared based on the inspection report.
Expert Opinion
Energy sector experts state that merely conducting external inspections of transmission lines is insufficient. Modern tools—such as thermal scanning, ultrasonic testing, and other technical inspection methods—should be utilized periodically to detect hidden defects in a timely manner.
Such regular monitoring can reduce the likelihood of major power outages and accidents.
What steps will be taken in the future?
According to the Electricity Department—
Detailed inspections of critical transmission lines will be conducted.
Greater use will be made of modern inspection techniques.
The condition of aging conductors will be assessed.
Lines and equipment will be replaced at necessary locations.
Maintenance procedures will be further strengthened.
These measures aim to enhance the reliability of the power supply.
