Factory provide nice price Automatic Transfer Switching Equipment-FTQ5 for Costa rica Manufacturer

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Model: FTQ5-125 FTQ5-250 FTQ5-630
Rated current (A): 16,20,25,32,40,50,63,80,100,125 140,160,180,200,250 315,350,400,500,630
Pole: 3,4
Rated operational voltage: AC400V/50Hz
Rated insulation voltage: 800
Rated impulse withstand voltage Uimp(KV): 8
Connecting and breaking capacity: 10Ie
Rated short-time withstand current: 10KA/200ms 10KA/200ms 25KA/200ms
Operating position: Normal power on,backup on,Normal and backup off
Operating transfer time: ≤1.5
Electric class: PC
usage category: AC-33B




This video shows how to wire a three way lighting circuit, this means that you can have three separate switches for example one in the hall way, one on the landing and one at the top of the stairs. To wire a three way lighting circuit you will need 2 two way switches and an intermediate switch. This video also shows how an intermediate switch works.
In a previous video I showed how a two way lighting circuit works-



working principle of three phase induction motor-induction motor-How does an Induction Motor work-An electrical motor is such an electromagnetically device which converts electrical energy into a mechanical energy. In case of three phase AC operation, most widely used motor is Three phase induction motor as this type of motor does not require any starting device or we can say they are self starting induction motor.For better understanding the principle of three phase induction motor, the basic constructional feature of this motor must be known to us. This Motor consists of two major parts:
Stator:
Stator of three phase induction motor is made up of numbers of slots to construct a 3 phase winding circuit which is connected to 3 phase AC source. The three phase winding are arranged in such a manner in the slots that they produce a rotating magnetic field after 3Ph. AC supply is given to them.
Rotor:
Rotor of three phase induction motor consists of cylindrical laminated core with parallel slots that can carry conductors. Conductors are heavy copper or aluminum bars which fits in each slots & they are short circuited by the end rings. The slots are not exactly made parallel to the axis of the shaft but are slotted a little skewed because this arrangement reduces magnetic humming noise & can avoid stalling of motor.

Working of Three Phase Induction Motor

Production of Rotating Magnetic Field

The stator of the motor consists of overlapping winding offset by an electrical angle of 120°. When the primary winding or the stator is connected to a 3 phase AC source, it establishes a rotating magnetic field which rotates at the synchronous speed.
Secrets Behind the Rotation:
According to Faraday’s law an emf induced in any circuit is due to the rate of change of magnetic flux linkage through the circuit. As the rotor winding in an induction motor are either closed through an external resistance or directly shorted by end ring, and cut the stator rotating magnetic field, an emf is induced in the rotor copper bar and due to this emf a current flows through the rotor conductor.
Here the relative speed between the rotating flux and static rotor conductor is the cause of current generation; hence as per Lenz’s law the rotor will rotate in the same direction to reduce the cause i.e. the relative velocity.

for more information about induction motor plz go to the link below-

http://electrical-engineering-portal.com/three-phase-induction-motors-operating-principle

http://www.electricaleasy.com/2014/02/working-principle-and-types-of.html

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