KB Electronics KBWD-15 - Manual (Page 4)

The Plug-in Horsepower Resistor ® will match the motor characteristics to the control without having to
calibrate the current limit (CL) and IR Compensation (IR) for most applications.
TABLE 2 – PLUG-IN HORSEPOWER RESISTOR ® CHART
Motor Armature Current
(Amps DC)
Plug-in Horsepower Resistor ®
(Ohms)
90 VDC SCR Rated
Motor Horsepower
130 VDC PWM Rated
Motor Horsepower
3.3 – 5.0 0.1 1/3 – 1/2 1/2 – 3/4
2.5 0.18 1/4 1/3
1.3 – 2.0 0.25 1/8 – 1/6 1/6 – 1/4
0.7 – 1.0 0.51 1/15 – 1/10 1/12 – 1/8
0.4 – 0.6 1.0 1/30 – 1/20 1/20 – 1/15
0.1 – 0.3 2.0 1/50 – 1/100 1/30 – 1/50
1. For motor current not on chart use next lowest value Plug-in Horsepower Resistor ® .
2. Disregard the horsepower ranges marked on Plug-in Horsepower Resistor ® since they are not correct for PWM
controls.
II. MOUNTING
The KBWD controls should be mounted on a flat surface and located in an area where it will not be exposed
to contaminants such as water, metal chips, solvents or excessive vibration. See fig. 2, p. 6 for Mechanical
Specifications.
Enclosure – When mounting in an enclosure, the air space should be large enough to provide adequate
ventilation. The maximum allowable ambient temperature at full rating is 45 °C/113 °F. Consult factory if more
information is required.
III. INITIAL SETUP
1. Install proper size Plug-in Horsepower Resistor ® (See table 2).
2. Connect the KBWD to a standard 115V 50/60 Hz AC line.
3. Follow the recommended supply wire sizes as per table 3 on page 7.
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FIG. 2 – KBWD-15 MECHANICAL SPECIFICATIONS – INCHES / (mm)
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