If the voltage on each leg to a contactor is 250 and the voltage on each leg leaving the contactor is 240 what corrective action is necessary?
a. Replace the contactor, the contacts are starting to pit, or burn.
b. Have an electrician correct the voltage, 250 volts is too high.
c. Clean or file down the contacts of the contactor.
d. Don’t do anything, the motor is getting the proper voltage.
a. Replace the contactor, the contacts are starting to pit, or burn.
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The resistance of the device D in Figure P3.80 is a non-linear function of pressure P. The i -v characteristics of D are shown as a family of curves for various pressures.
Assume:
VS = 2.5V R = 125?
a. Plot the DC load line.
b. Plot the voltage across D as a function of pressure.
c. Determine the current through D when P = 30 psig.
Find:
The DC load line, the voltage across the device as a function of pressure, and the current through the nonlinear device when P = 30 psig.