Electrical power

How to Build a More Resilient Power Grid – IEEE Spectrum

https://spectrum.ieee.org/energywise/energy/the-smarter-grid/learning-from-grid-failures-a-conversation-with-nicholas-abisamra North America’s electric transmission may be an engineering marvel, but that doesn’t make it immune to failure.  Efforts intended merely to harden infrastructure are not enough—the grid also needs to be resilient. Resiliency refers to characteristics of the infrastructure and operations such as strength and the ability to make a fast recovery.  Making system more resilient starts

Circuit breaker teardown

Here is teardown of 10 A DIN rail mounted miniature circuit breaker (Biltema brand) What you see when you open the case Turn around – circuit open/off/tripped Device reseted to “on” position On the left side of mechanism there is bimetallic overcurrent triggering mechanism – load current goes through bimetallic strip and heats it.  On

Circuit breakers for mains panel

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current, typically resulting from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected. In small mains and low voltage circuit breakers, fault current is usually done

Motor protector teardown

Electrical motors need protection devices. EATON Moeller PKZM0-0.63 is a Motor Protective Circuit Breaker with manually actuated motor-protective circuit-breaker IEC/EN 60947-4-1, VDE 0660 part 102, rotating handle with clear switch position display ON and OFF. The current rating of this AC motor protection device can be adjusted from 0.4A to 0.63A. In addition to thermal

Fuel Cells Poised to Replace India’s Diesel Generators – IEEE Spectrum

https://spectrum.ieee.org/computing/software/fuel-cells-poised-to-replace-indias-diesel-generators Diesel generators are widely used for decentralized power generation. These generators, although inexpensive, are inefficient and pose great environmental and health risks. Scientists are investigating cleaner, cost-effective, and more dependable technology for powering telecom towers and eventually buildings. A promising answer to the cost and pollution conundrum can be found in proton exchange membrane fuel

What Causes Cascading Power Grid Failures – IEEE Spectrum

https://spectrum.ieee.org/energywise/energy/the-smarter-grid/what-causes-cascading-power-grid-failures Scientists have pinpointed vulnerable transmission lines in the North American grid that could lead to massive blackouts, helping prevent them in the future. “In the North American power grid, the set of power lines that are susceptible to failures were found to represent a surprisingly small fraction of the whole network

One Bitcoin Transaction Now Uses As Much Energy As Your House In a Week – Slashdot

https://m.slashdot.org/story/333535 It look like Bitcoin is not very “clean” technology:  Bitcoin’s incredible price run to break over $7,000 this year has sent its overall electricity consumption soaring, as people worldwide bring more energy-hungry computers online to mine the digital currency.   Bitcoin miners burn through over 24 terawatt-hours of electricity annually. This averages out to a shocking 215

EMF meter GM3120

Have you ever wondered about how safe your place or position is regarding electromagnetic and magnetic fields? Then here is your chance to find out. Everyone is exposed to a complex mix of weak electric and magnetic fields, both at home and at work, from the generation and transmission of electricity, domestic appliances and industrial

Why Solar Microgrids May Fall Short in Replacing the Caribbean’s Devastated Power Systems – IEEE Spectrum

https://spectrum.ieee.org/energywise/energy/the-smarter-grid/should-a-devastated-caribbean-leap-forward-to-renewable-power-and-microgrids  After the destruction inflicted across the Caribbean by hurricanes Harvey, Irma, and Maria, renewable energy advocates are calling for a rethink of the region’s devastated power systems. Renewables advocates argue that the island grids should leapfrog into the future by interconnecting hundreds or thousands of self-sufficient solar microgrids. Some power system experts, however, say the solar-plus-batteries

Securing smart grid and advanced metering infrastructure

http://securityaffairs.co/wordpress/63902/security/securing-smart-grid.html  During the recent years, there have been two cyber-attacks on power plants in Ukraine, which for the first time in the history succeeded to disrupted and cut power in a country.  An analysis of the events in Ukraine indicates that in order for a cyber-attack to materialize, three conditions must exist: opportunity, ability, and motivation.