3 Phase Induction Motor Name Plate

In this article we will discuss each parameter mention on an induction motor nameplate.

3 phase induction motor name plate. Nema allows motors to operate at plus or minus 10 of the nameplate voltage rating while pointing out that this may degrade performance or efficiency. The volts of the motor 380v and amps are 30 1. The frame size provides a standard for details such as the location of mounting holes a height of the shaft above the mounting plate etc. For the purpose of this page we will be discussing induction motors which are typically found on most workshop machinery such as air compressors drill presses table saws band saws jointers shapers and lathes.

3 phase motor current calculation formula explained in the below image i have shown a 3 phase motor nameplate. When a three phase induction motor connected to a single phase power supply using the steinmetz connection operates in a practical no load condition not all windings consume active power. Connection to the motor terminals. The eff of the motor is 0 89 and pf is 0 85.

So here we are going to see how to read the induction motor nameplate and explanation. On the nameplate of a motor the working voltage is shown as 220 230 380 400 690. This name plate shows a frame size 326t. Some common ratings are 200 230 460 and 575 volts.

A three phase ac electric motor can be connected in star or delta depending on the winding characteristics of the motor. Nema defines standard voltage rating for three phase motors. Many single phase motors having two windings can be viewed as two phase motors since a capacitor is used to generate a second power phase 90 from the single phase supply and feeds it to the second motor winding. All necessary data specified on name plate like electrical data voltage current frequency power factor.

Electric motor name plate there are many types of electric motors some smaller than a human hair others large enough to power a locomotive. Single or three phase. Induction motors are most commonly run on single phase or three phase power but two phase motors exist. Today s premium efficiency 3 phase motors have efficiencies ranging from 86 5 at 1 hp to 95 8 at 300 hp.

Figure 1 typical induction motor nameplate information. The efficiency value that appears on the nameplate is the nominal full load efficiency as determined using a very accurate dynamometer and a procedure described by ieee standard 112 method b. Seeing the following nameplates we will connect a three phase ac motor as follows. Single phase induction motor cant be self starting because in this motor when current induce in rotor due to emf then rotor experience a force but it can t not decide direction to rotate because rotor are inner part and both upper side like stator have a same magnetic field in that case rotor create a hum sound when we give some torque on a particular direction then the rotor rotate start.