Wiring Instructions; Plug-In Horsepower Resistor® Selection - KB Electronics KBWS-12 Installation And Operating Instructions Manual

Note: Disconnect main power when installing or changing the Plug-In
!
Horsepower Resistor®.
TABLE 3 – PLUG-IN HORSEPOWER RESISTOR® SELECTION
SCR Rated Motor
Motor
Horsepower Ranges (HP)
Current
(Amps DC)
90 Volt DC
3.3 – 5.0 1/3 – 1/2
2.5 1/4
1.3 – 2.0 1/8 – 1/6
0.7 – 1.0 1/15 – 1/10
0.4 – 0.6 1/30 – 1/20
0.1 – 0.3 1/100 – 1/50
Notes: 1) 1 HP = 0.75 kW.
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.
12
PWM Rated Motor
Horsepower Ranges (HP)
180 Volt DC 130 Volt DC
3/4 – 1 1/2 – 3/4
1/2
1/4 – 1/3 1/6 – 1/4
1/6 – 1/5 1/12 – 1/8
1/15 – 1/10 1/20 – 1/15
1/50 – 1/25 1/50 – 1/30
2) The HP marking on the Plug-In Horsepower Resistor® does not apply to PWM controls.
200 Volt DC
1 – 1 1 ⁄
2
1/3 3/4
1/3 – 1/2
1/6 – 1/4
1/8 – 1/6
1/25 – 1/20
Plug-In
Horsepower Resistor®
Ω Part No.
0.1 9838
0.18 9837
0.25 9836
0.51 9834
1 9833
2.0 9949
CL Setting
(Amps DC)
7.5
3.8
3.0
1.5
0.9
0.5