SF6 gas is used as the insulating medium for AIS / GIS Substations for its superior dielectric strength property. Besides, SF6 is colourless, odourless, non-flammable, chemically inert in nature and highly stable. SF6 leakage is one of the most common problems for a power utility where a GIS or AIS circuit breaker is installed. The …
In the last two blogs, we have shared our knowledge on the technique of controlled switching to enhance the life expectancy of assets in the electrical network and improve system stability. By discussing how life span of reactors, capacitor bank assets and power transformers can be enhanced through controlled switching, we have underscored the criticality …
In our previous blog, we discussed the technique of controlled switching, a widely used technique to improve the life expectancy of assets and system stability. We had seen how the life span of reactor and capacitor bank assets can be extended through controlled switching. In this blog post, we will continue our discussion on controlled …
Continue reading "Expanding the life span of Power Transformers through Controlled Switching"
The electricity sector in India has seen rapid growth over the past few decades. With installed capacity of 373 GW, India is able to meet the demand for electricity. As generation capacity has grown, an extensive network of transmission lines has also been developed for evacuating power produced by different electricity generating stations and distributing …
Studies show that over 85% of disruptive failures in high voltage (HV) and medium voltage (MV) equipment are Partial Discharge related. Partial Discharge (PD) activity provides evidence of deterioration in assets, which can propagate and increase, until the insulation is no longer able to withstand the electrical stress therefore leading to flash-over and finally equipment failure. Therefore, early detection …
Continue reading "Partial Discharge Testing: Need, Testing Methodologies and Addressing Defects"
As elaborated in our previous post, Dynamic Contact Resistance Measurement (DCRM) tests play a pivotal role in preventing unexpected failures of High Voltage (HV/EHV/UHV) Circuit Breakers by cohesively assessing the healthiness of their contacts. Widely considered as the most comprehensive CB testing methodology, the success of any DCRM test depends on a trifecta of the …
High Voltage Circuit Breakers (HV/EHV/UHV) act as the most effective protection mechanism against electrical mishaps in the high voltage environment of Substations. Since Circuit Breakers (CBs) are mechanical devices, they are vulnerable to breakdowns if timely performance tests are not conducted to ensure their functional healthiness. In our earlier post, we broadly covered the 9 …
Continue reading "DCRM Testing For High Voltage Circuit Breakers: What, Why, How"
When it comes to the cohesive protection of man, machine and infrastructure from electrical mishaps, Circuit Breakers (CBs) play a linchpin role, especially in the high-voltage (HV) environment of Substations. With rapid advancements in technology, while the quality of HV CBs has definitely improved over the last few years leading to a significant drop in …
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