Precision Control Systems PanelIR 4555 - Manual (Page 27)

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