Table of Contents
What is electrical crowbar?
A crowbar circuit is an electrical circuit used for preventing an overvoltage or surge condition of a power supply unit from damaging the circuits attached to the power supply.
What is crowbar voltage?
This crowbar circuit has an 8V power supply, and triggers at around 10v. To change the power supply rating, the zener diode, ZD1, needs to be changed to reflect the new trigger voltage. It should be about 1V higher than the nominal supply voltage.
What is crowbar use?
The crowbar is a single metal bar with a single curved end and flattened points, often with a small fissure on one or both ends for removing nails or to force apart two objects. The iron lever is commonly used to open nailed wooden crates or pry apart boards.
What is crowbar resistor?
Crowbar resistors are three-phase resistance banks which are connected to the rotor windings of the DFIG (Doubly-Feed Induction Generator) such as in a wind power generator. They are used to prevent damage to the inverter circuits attached to the rotor side when a fault occurs in the grid.
What’s another word for crowbar?
In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for crowbar, like: lever, chisel, extract, jimmy, pry, remove, wrecking bar, pry bar, baseball-bat, pick-axe and pickaxe.
What SCR means?
A silicon controlled rectifier or semiconductor controlled rectifier is a four-layer solid-state current-controlling device. SCRs are unidirectional devices (i.e. can conduct current only in one direction) as opposed to TRIACs, which are bidirectional (i.e. charge carriers can flow through them in either direction).
What is example of crowbar?
The definition of a crowbar is a long metal rod with a slightly bent, forked end that is often used for prying. An example of a crowbar is a tool that could be used for breaking out of a cage.
Why is it called crowbar?
The accepted etymology identifies the first component of the word crowbar with the bird-name “crow”, perhaps due to the crowbar’s resemblance to the feet or beak of a crow. The first attestation of the word is dated back to circa 1400. The term jammy or jimmy most often refers to the tool when used for burglary.
What is a crowbar protection in SCR?
Crowbar protection is a fail-safe protection mechanism which shorts circuits the output of a power supply under failure conditions such as overvoltage. Crowbar protection can also refer to a circuit which has its sole purpose to cause a fuse to blow by subjecting it to high current.
What is a small crowbar called?
A crowbar, also called a wrecking bar, pry bar or prybar, pinch-bar, or occasionally a prise bar or prisebar, colloquially, in Britain and Australia sometimes called a jemmy and jimmy (also called jemmy bar), gooseneck, or pig foot, is a tool consisting of a metal bar with a single curved end and flattened points.
What is used of a crowbar?
Crowbar (tool) It is used as a lever either to force apart two objects or to remove nails . Crowbars are commonly used to open nailed wooden crates or pry apart boards. Crowbars can be used as any of the three lever classes but the curved end is usually used as a first-class lever, and the flat end as a second-class lever.
How does a crowbar work?
A crowbar circuit works by sensing a voltage that is above a certain threshold and shorting out the power supply. This causes a voltage drop in the rest of the circuit and current surge through the power supply that will trip a circuit-breaker or blow a fuse.
How is a crowbar a lever?
Crowbars can be used as any of the three lever classes but the curved end is usually used as a first-class lever, and the flat end as a second class lever. In this case, the force is applied on the opposite end of the fulcrum to the force that’s produced by it.
What is crowbar protection?
Crowbar protection is a fail-safe protection mechanism which shorts circuits the output of a power supply under failure conditions such as overvoltage. Crowbar protection can also refer to a circuit which has its sole purpose to cause a fuse to blow by subjecting it to high current.