1-10
1.16 Element Wattage/Amperage Calculation Charts
Use the charts below when changing voltages or determining amperage for a given element
configuration.
L1
L2
L3
Three Phase
Amperage
To determine Three Phase Amperage, solve for
Single Phase first:
= Single Phase Amps
Voltage
Wattage
240V
17,000W
= 40.944 Amps per Phase
Then divide the Single Phase Amperage by 1.73 to
determine Three Phase Amperage.
1.73
70.833 Amps
=
Example:
L1
L2
L3
Three Phase
Wattage
= New Wattage Rating
[
]
Old Voltage
New Voltage
2
kW Listed
X
If 208V supply is applied to a 17 kW element
rated for 240V, the calculation is as follows:
[
]
240V
208V
2
17,000 Watts
X
= 12.77 kW
Example:
To compute the New Wattage Rating of an element if a
different voltage is applied, use the following formula:
1.17 Troubleshooting
1.17.1 Control and Heating Problems
Problem
Probable Causes
Corrective Action
A.
Power cord is not plugged in or circuit
breaker is tripped.
A.
Plug power cord in and verify that
circuit breaker is not tripped.
B.
Controller has failed.
B.
If available, substitute a controller
known to be working for the
suspect controller. If the substitute
controller functions correctly, order
a new controller.
Controller won't
activate.
C.
Power supply component or
temperature control board has failed.
C.
If any of the components in the
power supply system (including the
transformer and temperature control
board) fail, power will not be
supplied to the controller and it will
not function.
