Welcome to the ETAP Induction machine component - Nameplate page of the Induction machine editor
Thierry Julio Epassa- P.E. in Sixteen USA States
Electrical Engineer Director || Arc Flash, Short Circuit, Electrical Studies|| US Security Clearance || Linkedin Newsletter Author|| OSHA, IEEE, NFPA Expert||Contractor for 1328 US Federal Facilities Arc Flash Studies
Welcome to the ETAP Induction machine component - Nameplate page of the Induction machine editor
Each component on ETAP has an editor like the one below. All the pages are shown on the left side. This induction machine editor has 15 pages: info, nameplate, Imp, etc.
The page we are currently displaying is blue-shaded: Nameplate
Let’s go through each field on the nameplate page of the induction machine editor.
Callout A: HP
HP stands for horsepower. You enter the machine HP. In my example, I entered 500, meaning the motor is 500 HP.
You can toggle the HP field, and it will become kW. In Figure 3b below, for example, 500 is no longer in HP but in kW
Callout B: kVA/MVA
KVA stands for kilo volts amperes. MVA means Mega volts amperes
It is not a user input field, but it comes from the calculation using the following field: HP, PF, and Eff. The software calculates the data using well-known electrical formulas.
Callout C: kV
kV stands for kilo volts
You enter the rate line to line voltage. You should notice that the value is always in kilo volts, not volts.
Callout D: FLA
FLA stands for Full Load Amperes. It is the current the motor draws from the system when it is fully loaded and when the machine is operating at its rated power, voltage, and frequency.
Callout E: %PF
PF stands for Power Factor. You enter the power factor % for 100%, 75%, 50% and No load. NL stands for No Load.
The power factor at 100% is used to calculate rated values. All the power factors are used to calculate operating loads and feeder losses.
Callout F: %Eff
Eff stands for Efficiency.
You enter the Efficiency percentage for 100%, 75%, 50%, and no load. NL stands for No Load.
An efficiency of 100% is used to calculate rated values. All the efficiency percentages are used to calculate operating loads and feeder losses.
We will finish the rest of the field in a subsequent article.
Let’s run the power flow studies to see some running data. Figure 7 shows the motor is consuming 403.6 kW and 199.8 kvar.
Figure 8 below shows different displays.
In ETAP, you can choose what options you want to display. In the precedent figure 7, I displayed the kW and kvar. I told ETAP to remove kW and kvar from this figure 8 and display kVA, Amps, and PF.
Pretty cool. 😉
The end - La fin - El Fin 😁
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Sr. VP Electrical Safety & Dynamics Engineering Divisions, PE, SMIEEE
1wAfter synchronous machines components, this is perhaps the second most complex editor in ETAP. Needless to say, the induction motor comes in all sizes from fractional to thousands of horsepower. Thank you Thierry for the interesting post.
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