Voltage Regulators are employed to reduce wide power line voltage swings for consistent operation. Best regulation, and hence most consistent equipment performance, is achieved with a ferroresonant regulator. This will not lead to consistent operation, as these voltage jumps will pass through the variac to equipment. Other Uses of Variac controlled conditioned power Plastic foam is often formed with a hot wire cutting tool. More precise applied voltage to the cutting tool ensures more precise plastic foam cutting.
Many chemical processes require tight temperature control.
True, quality thermostats will hold the temperature to tight tolerances, but some engineers have found that supplying precise regulated power to the thermostat controller results in even better chemical processing due to the tighter temperature control. Photography lights are sensitive to applied voltage. Subtle color changes can be traced to applied voltage variations. Use of a Variac controlled variable voltage regulator can stabilize these subtle color shifts, resulting in consistent photography results, less photographer frustration and greater client satisfaction. Variable Isolation Transformers Meter Options A Convenient front panel Voltmeter assists in adjusting initial setup voltage and serves as a constant check on operating conditions.