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4.4 AC Line Fuse
The AC Line Fuse acts as a disconnect in case of a catastrophic failure. If the AC Line Fuse blows, the
control is miswired, the motor is shorted or grounded, or the control is defective.
Note:
Fuse each AC line conductor that is not at ground potential.
4.5 Armature Fuse
The Armature Fuse acts as a diagnostic indicator. If the Armature Fuse blows, it indicates that there
is a problem after the control’s output. The Armature Fuse required can be calculated by multiplying
the maximum DC Motor Current times 1.7.
4.6 Plug-In Horsepower Resistor
®
A Plug-In Horsepower Resistor® (supplied separately) must be installed to match the control to the
motor horsepower and voltage in order for the IR Compensation and Current Limit settings to be
correct. Select the proper Plug-In Horsepower Resistor
®
according to Table 4-3. Selecting the proper
Plug-In Horsepower Resistor
®
is as important as selecting the proper Armature Fuse.
Plug-In Horsepower Resistors
®
are available from your distributor. Install the Plug-In Horsepower
Resistor
®
, as shown in Figure 2-3.
Note:
Be sure the Plug-In Horsepower Resistor
®
is inserted completely into the mating sockets.
