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What size of cable will you need for a 3 phase panel running 3 3kw motors?
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∙ 12y ago
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∙ 12y ago
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Would a row of washers with inverter drives connected to single phase panel board cost the same to run as it would set up on three phase panel board?
three phase would be cheaper for running motors are more efficient single phase is only used for small motors and loads where operating economy is not a concern
Why is electricity generated as 3 phase?
It is more economical especially for running motors. Most motors start much better with 3 phase service. It also takes less current than single phase for a motor to run, therefore the power meter spins less for electrical cost.
What are three phase motors?
Three phase motors are motors which operate under three phase supply.Each phase is displaced from one another by 120 degrees.It produces three fluxes which are also 120 degrees displaced.
Why would three phase be used instead of single phase?
Three phase electricity is used instead of single phase for industrial situations. Industries use three phase electricity instead of single phase to operate electric motors driving heavy machinery. Three phase electrical motors produce more power from the same amount of electricity and maintain steadier speed. Small portable motors such as drills and mixers use single phase. Motors used around the house are single phase. Motors used to run large industrial machines use three phase.
What are the Application of single phase induction motor?
Split-phase motors are used in many applications that require a medium amount of performance from a single phase source. Many of the motors used in homes that are supplied by single phase power are split-phase motors. Some applications include running fans, blowers, water pumps, air compressors, conveyor belts, and more. The only limits on the applications that can use split-phase motors are the availability of single phase power and the charectoristics of the motor itself.
Does a 480 volt panel have a neutral bus?
Usually yes. A typical 480 volt panel is a 3 phase panel with 480 volts line-to-line and 277 volts line-to-neutral. However, I did once see a panel that was 480 volts, 3 phase, but because it served only motors it did not have a neutral. (a 3 phase motor doesn't use a neutral.) Similarly, if a panel uses only 2 legs of a 3 phase 480 volt system, which would be called single phase, it would not require a neutral if it only feeds 480 volt single phase loads. But I find the idea of no neutral to be extremely unusual and in my one personal experience, I blamed it on the age of the system. In 16 years of commercial and industrial construction I have never installed a 3 phase panel without a neutral and all my work is designed by engineers.
Why 2 phase induction motors are not used in industries?
A two-phase* system is archaic, and has been completely superceded by three-phase systems, so there is no demand for two-phase induction motors. (*A two-phase generator has two phase windings, displaced from each other by 90 degrees.)
What cable size is needed for 415VAC 3 Phase 400kVA generator to a load 50meters away?
As example, at 380V the generator produces 685A per phase. Therefore you will require 2 x 120mm2 cables per phase. (1 x 120mm2 cable will support 365A per phase). In total you will require approximately 1/2km of cable to cover the 50m run between the generator and the ATS panel/Load. i.e. 5 phases in total - 2 x 50m cables per phase.
What is the difference between a reisidential and industrial electrician?
A residential electrician works with single phase power (120/240 volts), runs romex cable through the wood (usually) walls, installs receptacles, switches, lights, panel, meter. . .Can work on new houses and remodels. An industrial electrician works with single phase and three phase power (120/208, 240, 277/480) usually runs conduit or cable trays to protect the wiring from damage, can install receptacles, switches, lights, panels, meter, switchgear, motors, motor controls, transformers. . . Can work on new plants or remodels.
Are potential relays used to energize or de energize split phase motors?
Yes, potential relays are used to energize and de energize split phase motors.
Why is the neutral wire in any system half the magnitude of the line wire?
in case of motor, only 3core cable are used. Because there is phase balence between the winding. But in case of wiring,panel installation, 3.5c cables are normally used. Because there is unbalenced between the phase current. So the neutral taken to give the return path to flow of unbalenced (rush) current. Which always less than phase current,so the neutral cable is take half of the phase cable.
How many microfarad of starting capacitor is best for 15hp 3phase motor?
Starting capacitors are only required for single-phase induction motors. They are not necessary for three-phase motors.
