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60 Volts is generally considered a safe approximate maximum. In many applications that require 120 volts DC, the system will be center tapped so you have +60v and -60 volts so the hot to ground voltage is within safe limits.
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When can high voltages be relatively safe?
When the current is very low; static electricity has a very high voltage but little current. On the other hand very high current won't even penetratrate the skin if the voltage is low. It takes both and AC is worse than DC because it can disrupt nerve impulses that control the heart.
What is the need of extra high voltage transmission lines?
it is cheaper to use high voltage of transmission because, it is cheaper to boost the voltage up really high and keeps the current low, also the big pylons with huge insulators will reduce the energy wasted. the transformer have to step the voltage up for efficient transmissions and it bring back down to safe usable levels. the voltage is increase by a step up transformer it's then reduced again at the consumer end using a step down transformer. The only thing missing from the above narrative is the reason itself: Every conductor has some resistance. When an electric current flows through a conductor, the resistance of the conductor causes loss of some of the energy. The loss is LESS when the voltage is higher and the current is smaller. The big pylons, the huge insulators, and all the step-up and step-down transformers wouldn't be necessary if the voltage was the same 110 volts all the way from the generating plant to your house. But shipping it at high voltage saves more energy than the cost of all that extra infrastructure.
What is the difference between 125V 15A fuse and 230V 15A fuse?
The voltage rating of a fuse (in this case 125V or 230V) defines the maximum circuit voltage that the fuse is safe to be used on. A fuse with a voltage rating of 125V should not be used in a circuit with a voltage greater than 125V. If a 125V fuse were installed in a 230V circuit and an overload current occurred, the fuse could explode.
What is meant by a nominal current?
The word nominal means the lowest possible safe amount. So, nominal current or nominal voltage is the lowest amount necessary to perform an electrical function like keeping a light turned on.AnswerThe original answer is incorrect. 'Nominal' simply means 'named'. So a 'nominal voltage' is the 'named voltage', as opposed to an 'actual voltage'. For example, the nominal voltage of residential supplies in the UK is 230 V; however, this value is allowed to vary between +10/-6% of the nominal voltage. In other words, a nominal voltage of 230 V may vary between 216 V and 253 V.
How does a current transformer work?
A current transformer is used in high voltage circuits where it is not possible to measure current directly. A CT is a step up transformer with only one turn in primary. There will be as many cores based on the purposes like metering, protection etc. The secondary of a CT should never be kept open circuited bcoz very high flux will be developed in the secondary and hence it may be damaged.
Is it safe to have a 250 voltage device in a 110 volt current?
No. You will need a transformer to step up the voltage and you will possibly need to convert the plug.
Why voltage is low while using heater as home appliance?
The current is proportionately high as heater requires current to heat the filament.The voltage is deliberately low to sustain the safe power consumption limits.
Wts the use of CT in Grid station?
ct is currrent transformer are use is protection instromentAnswerA current transformer is an instrument transformer. It allows the current flowing through high-voltage (h.v.) circuits to be monitored safely by (1) reducing the size of that current to a safe level, and (2) electrically isolating its secondary winding from the high-voltage system.A CT provides a safe means of (1) measuring the h.v. circuit's current, as well as (2) providing an input to the high-voltage system's protection relays.
How are relays safe?
Relays can be considered safe when used for remote switching. It only takes a small, low voltage current to activate a relay, which can then switch a high voltage, high current supply. There is no electrical connection between the coil and contacts. So switching dangerous voltages can be done at a distance, without anyone getting near the dangerous voltages.
What is the function of a automatic voltage regulator?
It protects your sensitive electronic equipment from brownouts and over-voltages. Uncorrected voltage fluctuations gradually degrade the life of electronic components, potentially causing premature failure. An AVR not only adjusts voltages to safe levels, but also provides surge protection against electrical surges and spikes and lightning.
When can high voltages be relatively safe?
When the current is very low; static electricity has a very high voltage but little current. On the other hand very high current won't even penetratrate the skin if the voltage is low. It takes both and AC is worse than DC because it can disrupt nerve impulses that control the heart.
What is the different between 6.6 kv 160 a 11 kv 160 a fuses?
6.6 kV and 11 kV refer to the voltage rating of the fuse. 160A refers to the current rating. The 6.6 kV fuse is safe to use in a circuit with a voltage up to 6.6 kV and no greater. The 11 kV fuse is safe to use in a circuit with a voltage up to 11 kV.
Is dino direct safe to buy from?
No it is not safe,
What does current mean in current electricity?
Current, measured in Amps, is the movement of electrons within a conductor. In direct current (DC) circuits, the electrons are always moving in a single direction from the minus to the plus. In alternating current, or AC, the electron flow reverses 120 times each second (in the USA) or 100 times each second (Europe). This is the way electricity is delivered to homes in nearly all of the developed world. Without getting too much into technical details, alternating current allows the use of transformers which make generating, delivering, and using electric power more convenient, cost effective and safe. Current is the actual movement of electrons. Other important measures in electricity are voltage, which is potential force, or ability to cause electrons to move. Power, which is energy released and is measured by the current times the voltage. There are many other measures.
Is there a led you can connect to 12vdc?
No, not directly. A l.e.d. has to have the current through it limited to a safe value. This can be done with a simple series resistor or by operating the l.e.d. from a current source rather than a voltage source. Some l.e.ds are supplied in a housing which has an in-built current limiting resistor.
Which instrument is used to measure 500 kV AC voltage?
Volt meter; And 500kV AC voltages are not measured directly - potential transformers, or capacitors are used to step 500kV down to safe voltage levels for measurement purposes (usually 66-120 volts).
D cell battery cause electric shock?
No, as D cell battery does not have enough power to shock you. *edit D Cell batteries don't have enough VOLTAGE to shock you. They have plenty of power (Power = Voltage*Current) to shock you, but first you'd have to use a circuit to increase their voltage to thousands of volts. This would decrease their current proportionally and keep the power level the same. Car batteries for example have tremendous amounts of power, but it's in the form of massive amounts of current (number of electrons flowing), the Voltage (intensity of the electrons) is only 12 Volts, which is still safe.
