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LB-40(C) thru LB-60(C) (Portable) - User Manual
4.3) AMPERAGE CALCULATIONS
The INPUT VOLTAGE, PHASE, TOTAL POWER RATING, and HEATER
VOLTAGE RATING are used to calculate the amperage.
NOTE: 380-425V heaters are not usually rated for 380-425V. They are usually 208-240V heaters
that have been re-stamped 380-425V and jumpered in series.
FORMULAS TO CALCULATE 3 PHASE AMPERAGE
208-240V & 440-600V
DEFINITIONS:
I = Amperage
P
= Total Power Rating
T
THREE PHASE AMP DRAW CALCULATIONS (AMPS)
Input Voltage 208 220 230 240 380 400 415 425 440 460 480 550 575 600
LB-40
111
LB-50
139
LB-60
167
4.4) ACTUAL POWER RATING CALCULATIONS
Because the HEATER VOLTAGE RATINGS only come in 4 different voltages, and there are so
many different voltages in the field, the TOTAL POWER RATING is only completely accurate if the
VOLTAGE IN is exactly equal to the HEATER VOLTAGE RATING. This means, in most cases, the
TOTAL POWER RATING is not completely accurate. The AMERAGE and INPUT VOLTAGE can
be used to calculate the ACTUAL POWER RATING.
96
100
105 67.6 58.2 60.4 61.8 44.1 46.1 48.1 35.3 36.9 38.5
120
126
131 84.5 72.8 75.5 77.3 55.1 57.6 60.1 44.1 46.1 48.1
144
151
157
101 87.3 90.6 92.8 66.2 69.2 72.2 52.9 55.3 57.7
380-415V (using 208-240V heaters)
V
= Input Voltage
I
V
= Heater Voltage Rating
H
20 of 29
Electro-Steam Generator Corp.
rev. 12102018
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