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Telephone exchanges are commonly affected during heavy rainfall accompanied by lightning. For the first time, researchers at the Indian Institute of Science (IISc) have come up with a technology that can help these exchanges to overcome the lightning attack.
The telephone wires that run from the exchange to homes are exposed to high voltage and high current surges because of multiple reasons like natural lightning and interaction with power transmission lines. A power surge, if transmitted to the exchange or the customer premises, can damage the low power telecom equipment.
IISc researchers have developed new equipment that can ensure better safety of the digital telecom exchanges against lightning surges. The study is carried out by the researchers from the Department of Electrical Engineering, IISc. Of course, digital telecom exchanges have a built-in system, called protection cards, to protect against voltage and current surges.
The IISc researchers have devised equipment that can thoroughly test the protection cards in service like situations. Their findings are published in the journal IEEE Transactions on Industry Applications.
The surge protection card attempts to limit the over voltage supplied to an electric device either by limiting or diverting the surge to the ground.
Protection cards are designed with different levels of protection called primary and secondary protection. When a high voltage or high current event occurs, the primary protection device absorbs the excess energy instantaneously and bypasses it to the ground. The secondary protection is needed to take care of residual energy left after the primary protection is activated. The protection cards must be tested before installation in exchanges.
Your phone can work during lightning - Bangalore Mirror
The telephone wires that run from the exchange to homes are exposed to high voltage and high current surges because of multiple reasons like natural lightning and interaction with power transmission lines. A power surge, if transmitted to the exchange or the customer premises, can damage the low power telecom equipment.
IISc researchers have developed new equipment that can ensure better safety of the digital telecom exchanges against lightning surges. The study is carried out by the researchers from the Department of Electrical Engineering, IISc. Of course, digital telecom exchanges have a built-in system, called protection cards, to protect against voltage and current surges.
The IISc researchers have devised equipment that can thoroughly test the protection cards in service like situations. Their findings are published in the journal IEEE Transactions on Industry Applications.
The surge protection card attempts to limit the over voltage supplied to an electric device either by limiting or diverting the surge to the ground.
Protection cards are designed with different levels of protection called primary and secondary protection. When a high voltage or high current event occurs, the primary protection device absorbs the excess energy instantaneously and bypasses it to the ground. The secondary protection is needed to take care of residual energy left after the primary protection is activated. The protection cards must be tested before installation in exchanges.
Your phone can work during lightning - Bangalore Mirror
