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7.7 Motor Overload (I
which limits the maximum current to the motor, prevents motor burnout, and eliminates
nuisance trips. The CL Trimpot is factory set to 160% of the drive rated current. To
increase the current limit, rotate the CL Trimpot clockwise. To decrease the current limit,
rotate the CL Trimpot counterclockwise. See Figures 33 – 38.
*UL approved as an electronic overload protector for motors.
In order to ensure that the motor is properly protected with the I
required that the CL Trimpot be set for 160% of the motor nameplate rating. This is
accomplished as follows:
Note: This adjustment must be made within 6 seconds or the I
1. Connect an AC RMS ammeter in series with one motor phase.
2. Set the CL Trimpot fully counterclockwise.
3. Adjust the speed setting to 30% of full speed.
4. Lock the motor shaft and adjust the CL Trimpot to 160% of the motor nameplate
rated current.
Example: A 2 HP motor has a full load current rating of 5.2 Amps. Set the CL
Trimpot to 5.2 X 160% = 8.3 Amps
FIGURE 33 – CATALOG NO.
ID5202-CO CL TRIMPOT RANGE
8.3
6.1
4.0
CL
(Shown Factory Set to 10.7
FIGURE 36 – CATALOG NO.
ID5402-CO CL TRIMPOT RANGE
4.2
3.1
2.1
CL
(Shown Factory Set to 5.3 Amps)
2
t) with RMS Current Limit (CL)*: Sets the current limit (overload),
FIGURE 34 – CATALOG NO.
ID5203-CO CL TRIMPOT RANGE
10.7
7.4
12.5
5.5
(Shown Factory Set to 14.4
FIGURE 37 – CATALOG NO.
ID5403-CO CL TRIMPOT RANGE
5.3
4.4
6.2
3.0
(Shown Factory Set to 7.4 Amps)
9.8
14.4
17.0
CL
5.8
7.4
8.5
CL
2
t feature, it is
2
t Trip will occur.
FIGURE 35 – CATALOG NO.
ID5401-CO CL TRIMPOT RANGE
2.6
2.0
1.3
CL
(Shown Factory Set to 3.2 Amps)
FIGURE 38 – CATALOG NO.
ID5405-CO CL TRIMPOT RANGE
10.3
7.6
5.0
CL
(Shown Factory Set to 13.3 Amps)
3.2
3.8
13.3
15.5
25
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