KB Electronics KBWS-25D - Manual (Page 21)

CAUTION! Adjusting the CL above 150% of motor rating can cause overheat-
ing and demagnetization of some PM motors. Consult the motor manufacturer.
Do not leave the motor in a locked condition for more than a few seconds since
armature damage may occur.
To Calibrate the CL Trimpot:
1. Disconnect the AC power. Wire in a DC ammeter in series with either motor
armature lead. Lock motor shaft. Be sure that the correct Plug-In
Horsepower Resistor® is installed.
2. Set the CL trimpot fully counterclockwise.
3. Apply power. Adjust the CL trimpot until the desired current limit (CL) setting
is reached.
WARNING! Do not leave the motor shaft locked for more that 2 - 3 seconds
or motor damage may result.
F. IR Compensation (IR) – Sets the amount
of compensating voltage required to keep
the motor speed constant under changing
loads. The IR trimpot is factory set for 10
Volts (at 180/220 Volts DC output) and 5
Volts (at 90/130 Volts DC output). For
higher compensating voltage, rotate the IR
trimpot clockwise. For lower compensating
voltage, rotate the IR trimpot counterclock-
wise. See Figure 16. Be sure the proper
Plug-In Horsepower Resistor® is installed.
See Table 3, on page 12.
21
AND 5 VOLTS AT 90 VOLTS DC OUTPUT)
7.5,15
10,20
5,10
2.5,5
0
(SHOWN FACTORY SET TO 10 VOLTS
AT 180 VOLTS DC OUTPUT
VOLTS
FIGURE 16 – IR TRIMPOT RANGE