KB Electronics KBWS-25D - Manual (Page 12)

12
Note: Disconnect main power when installing or changing the Plug-In
Horsepower Resistor®.
III. WIRING INSTRUCTIONS
Warning! Read Safety Warning, on page 5 before using this control.
Disconnect the AC line before wiring.
Note: To avoid erratic operation, do not bundle AC line and motor wires with wires
from signal following, Start/Stop Switch, Enable, or any other signal wires. Use
shielded cables on all signal wiring over 12” (30cm). Shield should be earth ground-
ed on the control side only. Wire the control in accordance with the National
Electrical Code requirements and other codes that may apply to your area. See
Figure 4 on page 13.
Be sure to properly fuse each conductor that is not at ground potential. Do not fuse
neutral or grounded conductors. See Section VIII, on page 18. A separate AC line
switch or contactor must be wired as a disconnect so that each ungrounded con-
ductor is opened. See Application Note, Section VII, on page 18.
TABLE 3 – PLUG-IN HORSEPOWER RESISTOR® SELECTION
Notes: 1) 1 HP = 0.75 kW. 2) The HP marking on the Plug-In Horsepower Resistor® does not apply to PWM controls.
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Motor
Current
(Amps DC)
SCR Rated Motor
Horsepower Ranges (HP)
PWM Rated Motor
Horsepower Ranges (HP)
Plug-In
Horsepower Resistor®
CL Setting
(Amps DC)
90 Volt DC 180 Volt DC 130 Volt DC 200 Volt DC Ω Part No.
3.3 – 5.0 1/3 – 1/2 3/4 – 1 1/2 – 3/4 1 – 1 1 ⁄
2
0.1 9838 7.5
2.5 1/4 1/2 1/3 3/4 0.18 9837 3.8
1.3 – 2.0 1/8 – 1/6 1/4 – 1/3 1/6 – 1/4 1/3 – 1/2 0.25 9836 3.0
0.7 – 1.0 1/15 – 1/10 1/6 – 1/5 1/12 – 1/8 1/6 – 1/4 0.51 9834 1.5
0.4 – 0.6 1/30 – 1/20 1/15 – 1/10 1/20 – 1/15 1/8 – 1/6 1 9833 0.9
0.1 – 0.3 1/100 – 1/50 1/50 – 1/25 1/50 – 1/30 1/25 – 1/20 2.0 9949 0.5