Appendix A Multiple Heater Wiring - Research PanelIR 4555 User Manual

TM
Model 4555 PanelIR User Manual
Appendix A
DETERMINING THE
CURRENT PER LAMP
Research, Inc.
Multiple Heater Wiring
1. Calculate the percentage of the applied voltage to the lamp's rated voltage:
Percent Voltage =
2. Use Figure A-1 to determine the percent of power dissipated by the lamps at that
percent voltage. Or for greater accuracy, calculate the percent of power
dissipated:
Percent of Power Dissipated = (Percent Voltage)
3. Determine the power dissipated:
Dissipated Power = Percent of Power Dissipated X Rated
Power
4. Calculate the lamp current:
Lamp Current =
Example: Assume a 3800 T3, 3800 watt, 570 volt lamp is to operate in a 440 volt
line.
1. Percent Voltage =
2. The percent-dissipated power at 77% of rated load is about 67%. Or to calculate:
Percent of Power Dissipated = (.77)
3. Dissipated Power = 67% Percent of Power Dissipated X 3800 Watts = 2546 watts
4. Lamp Current =
24
Applied Voltage X 100
Ra ed Voltage of Lamp t
Dissipated Power
Applied Voltage
440 Applied Voltage X 100
570 Rated Voltage of Lamp
1.54
= 66.8% or 67%
2546 Watts Dissipated Power
440 volts Applied Voltage
Appendix A
1.54
= 77%
= 5.78 Amperes