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- avoid crosstalk
- safety, a short between them could cause hazardous voltages where none are expected
- protect low voltage equipment from damage
- etc.
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Why the graph of breakdown voltage is cheaper than knee voltage?
Break down voltages happens at low voltages (.6 for silicon & .3 for germanium), whereas knee voltages at higher voltages. That's why its cheaper.
Why two voltage sources of different voltages cant be connected in parallel and what happened when you connect them?
The higher voltage source forces current backwards into the lower voltage source, which can damage it or even cause it to explode.
Why voltage of unit should match with grid when synchronising with grid?
If both the voltages do not match then there will be current fllow from higher voltage to low voltge, this is loss of power and can lead to even tripping of the system.
When cells are connected in parallel then?
putting cells in series gives you a higher voltage but at the same current rating. putting cells in parallel gives you the same voltage but at a higher current rating. series parallel can give you both..
Why do three phase motors have dual voltage rating?
Some motors have dual voltage ratings because it is typically better to use the higher voltage if available because the current will be lower. However, the higher voltage may not be available everywhere so the unit is designed to work on the most available voltages if the higher voltage is not available. Since the motor in your question is more for a commercial use than at home, the range of available voltages may be limited at certain sites.
How are lower voltages combined into higher voltages for transmission?
Low voltages are not 'combined into higher voltages' for transmission! The lower voltage (e.g. the voltage generated at a power station) is applied to the primary winding of a large power transformer, and the required higher transmission voltage then appears across the transformer's secondary winding. The magnitude of the secondary voltage is determined by the turns ratio of the transformer's windings.
Why the graph of breakdown voltage is cheaper than knee voltage?
Break down voltages happens at low voltages (.6 for silicon & .3 for germanium), whereas knee voltages at higher voltages. That's why its cheaper.
What is considerede low voltage?
Low voltage is a relative term, as there is no 'level' at which a voltage is rated 'low'. Electrical safety codes define low voltage as circuits that do not require the same protections necessary at higher voltages.
What voltage does a potential relay operate from?
The voltage for a potential relay will depend on the circuit that the relay is installed in. The relay can be made for low voltages (5v) to higher voltages (440.)
What voltages do industrial electricians work with?
480 volt amperage and up to higher voltage
Why are transformers used for transmission of electricity into your home?
The voltage provided by power company are higher what your home uses so transformers step down the voltage for your house. Higher voltages in your home would cause a potential safety hazard. The higher voltages on transmission lines are used to cope with voltage drops over long distances.
Can you use a 250v 3a fuse to replace a 125v 3a fuse for equipment voltage is 100volt?
Yes, fuses of a higher voltage can be used safely. What is not recommended is to use a lower voltage fuse on higher voltages.
Why there is no electricity generation at 500 kv?
Electrical generation at higher voltages would have to have higher insulation between the windings of the generator. This would become physically impossible as the size of the generator would become so large that is would become inefficient. Voltages are generated at lower voltages where the insulation factor between windings is much lower. This low voltage is then transformed into a higher voltage for transmission to other locals.
Can batteries of unequal voltages b connected in parallel?
no..... The battery with lower voltage will consume power from the higher one...
When electricity travels long distances it is better to have it at higher voltages?
when transmission we usually use high voltages becoz at higher voltages current is less(p=vi,voltage is inversly proportional to current at constant power) so that we can minimize copper losses i2R losses.
Why we use binary system?
Computer understands the changes in voltages. To be more precise, a higher voltage and a lower voltage determines the action the computer takes for an input. And to make it more simple for programmers, a higher voltage is given the value 1 and a lower voltage is assigned the value 0.
Why two voltage sources of different voltages cant be connected in parallel and what happened when you connect them?
The higher voltage source forces current backwards into the lower voltage source, which can damage it or even cause it to explode.
