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Through the wire.
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∙ 11y ago
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How do you tell if you have delta or wye power?
In Europe, low-voltage three-phase distribution is by means of a four-wire system (three line conductors and a neutral) supplied from a wye-connected transformer secondary. In North America, low-voltage is supplied from a delta-connected transformer secondary, one phase of which is centre-tapped and earthed (grounded). The single-phase supply to residences is then supplied by that particular phase, giving 240 V line-to-line and 120 V line-to-neutral. You can tell if you have a delta power when the phase voltage is equal to the line voltage and that you have a star power when the phase voltage =root 3(THE LINE VOLTAGE).
How does the low-voltage circuit controls the power to the high-voltage circuit?
Through a relay or some other kind of high voltage switching device.
Is high power factor good or bad to the power company or consumer?
The power required by the appliance is directly proportional to the current,voltage, power factor. If the power factor is low, more current is required to supply the rated power of the appliance hence the ohmic losses increase. Therefore the efficiency decreases and the voltage regulation increases which is bad for the power company as well as the consumer.In the study of alternating current [that which supplies our homes and businesses in the United States], it will be observed that there are alternating waves of both voltage and current.In a circuit with purely resistance load, the waves of current and voltage are in exact phase relationship to each other. This means that when the voltage is at it's peak, the current flow is at it's peak as well.An inductive load [coil] causes the current wave to lag or fall behind the voltage wave, so that the peak current flow is some time after the voltage wave is at it's peak level.A capacitive load [capacitor] causes the current wave to lead or advance ahead of the voltage wave, so that the peak current flow is some time in advance of the peak of the voltage wave.The consequence of this is that the AVAILABLE REAL POWER is the relationship between the current and voltage waves.Resistive circuits have a power factor of 1.0, or unity, because the waves are in phase.The more out of phase the relationship between voltage and current, the less efficient the use of available power, the more "waste" energy.The less efficient the use of energy, the larger the size of transmission and generating equipment required to provide for energy needs, and the more costly the operation of utilization equipment.The power factor of a device is what determines how much useful power is used out of the total amount of power which is supplied to it from the source.A power factor as close to 1 as possible is desirable because then most of the power transferred from the source to the load is useful power.1. If a device has a power factor much less than 1, that means more total input current must be supplied for a given output power dissipation and a more powerful source is required to deliver the required output power. This means the device must draw a higher amount of volt-amps (VA) compared to the actual load power it is delivering, which means its conversion of input power VA to output power VA is inefficient.2. The closer to a power factor of 1 that a device has, the better the total current which has to be supplied will match the output from the device, and the more efficient it will be in its conversion of input power VA to output power VA.For more information see the Related Link shown below.
What are dangers of low voltage electricity?
please provide more detail, what do you mean low voltage? Also its not necessarily the voltage your worried about but the amount of current that can be supplied.
What happens when you connect a low current device to a high current source?
The High current source otherwise known as the supply, can handle any low current device or low current load as long as the voltages are the same. The higher the Supply current or as you call the source the better for any device/load
Do you need to hook up a power cable if your using SATA drive?
Yes; power is not supplied by the data cable. An exception might be a small-form-factor, external, USB-connected drive, as the USB port can power low-power devices. If an external USB hub is expected to power external devices, it's best if the hub itself is powered, otherwise available power is split among too many devices, potentially leaving something underpowered.
How much current can a USB port on a PC typically supply?
The USB 1.x and 2.0 specifications provide a 5 V supply on a single wire from which connected USB devices may draw power. The specification provides for no more than 5.25 V and no less than 4.75 V (5 V±5%) between the positive and negative bus power lines. For USB 2.0 the voltage supplied by low-powered hub ports is 4.4 V to 5.25 V
What are the advantages of rs232 over USB?
- USB is a full standard, from physical connection all the way up to software stacks (RS-232 only really defines the electrical interface)- USB is faster- USB has standard drivers for many different device classes- USB can provide power for low power devices- USB has a simple 4 pin connector- USB allows multiple devices to be connected to a single port on the master via a hub
What is the difference between low voltage release and low voltage protction?
After a power failure, a device with low voltage protection will not restart automatically after power is restored to normal. This normally means that the breaker must be reset. A device with low voltage release automatically starts when power is returned to normal.
What is the voltage of a USB?
Clients have to accept 4.75 to 5.25V and must be able to send configuration data as low as 4.4V. Hubs are allowed to drop as much as 0.35V. By itself, a USB plug does not have to supply more than 100mA; however up to 500mA can be negotiated between device and host. Some USB hosts simply offer up 500mA from the get-go. USB power supplies short the two data lines (white and green) which allows the device to probe for the fact that they're power supplies (i.e. that they provide the full 500mA without negotiation and that they won't respond to data).
Is low voltage harmful to electronics?
No the low voltage is not harmful for all ever . if you applied low voltage than the output power of your device will low and you can also observe that the performance of your device will also reduce. it may also make the device inactive.
What to do when your wii skylander portal of power does not sync?
Try the following steps... 1 - Check the batteries - low batteries make it hard to sync 2 - Try to sync at the Channel Select screen before you start to play 3 - If there is another USB device plugged into the Wii, unplug that device and try again. good luck!
Do modern cars come with built-in USB chargers?
The Ford Explorer Ranger come with built-in USB charger. Griffin Power Jolt Universal charger hs a plug for modern cars 12-volt power accessory outlet and a Universal Type A USB socket. This has ultra low-profile design.
The numerical apertures of the condenser and low power objective lenses are 1.25 and 0.25 you are supplied with a filter that selects a wavelength of 520nm what is the limit of resolution?
346.7nm's
A high capacity input device that is read using low power laser is optical disk?
hard disk
How does a welding transformer work?
A welding transformer uses the alternating current supplied to the welding shop at a high voltage to produce the low voltage welding power
Is it true that Less watts will be spend when low voltage?
Yes. If you reduce the voltage to the same device, then it uses less power.
