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Relay Output Jumpers
Overload Trip
Current Adjustment
Potentiometer
Potentiometer
Setting
A
1.2
10
2.4
20
3.6
30
4.8
40
6.0
50
7.2
60
8.4
70
9.6
80
10.8
90
12.0
100
ACH 400 with Electronic Bypass User's Manual
A Motor Run relay contact output is provided at terminals X2:18 and X2:19
for external indication of the motor status. The output consists of a normally
open Drive Run contact and a normally open Bypass Run contact. The two
contacts are connected in parallel so that a contact closure is provided
whenever the motor is running. The Drive Run and Bypass Run contacts can
be separated and used individually by cutting jumpers R63 and R64 on the
bypass control board. See Figure 3-4 in Chapter 3.
The overload protection trip current must be adjusted to the motor nameplate
current using the adjustment potentiometer located in the lower right hand
area of the bypass control board as shown in Figure 4-1. Table 4-2 shows the
trip currents for the various frame sizes for potentiometer settings for 0 to 100.
Table 4-2 Overload Trip Current Potentiometer Settings
Trip Currents for the Various Potentiometer Settings
B
C
2.5
3.8
5.0
7.6
15.0
7.5
11.4
22.5
10.0
15.2
30.0
12.5
19.0
37.5
15.0
22.8
45.0
17.5
26.6
52.5
20.0
30.4
60.0
22.5
34.2
67.5
25
38.0
75.0
Table 4-3 Overload Trip Current DIP Switch Code Selection
208 - 240 VAC
ACH401x0042x
ACH401x0052x
ACH401x0062x
ACH401x0112x
ACH401x0162x
ACH401x0202x
ACH401x0302x
ACH401x0412x
ACH40160601x
ACH40160701x
Chapter 4 – Start-up Procedure
D
E
7.5
10.4
15.5
20.8
31.0
31.2
46.5
41.6
62.0
52.0
77.5
62.4
93.0
72.8
108.5
83.2
124.0
93.6
139.5
104.0
155.0
308 - 480 VAC
ACH401x0043x
ACH401x0053x
ACH401x0063x
ACH401x0093x
ACH401x0113x
ACH401x0163x
ACH401x0203x
ACH401x0253x
ACH401x0303x
ACH401x0413x
ACH40160603x
ACH40160703x
ACH40161003x
ACH40x61203x
ACH40x61403x
ACH40262103x
ACH40262603x
ACH40263203x
ACH40264003x
F
G
H
20.0
47.7
40.0
95.4
60.0
143.1
80.0
190.8
100.0
238.5
120.0
286.2
140.0
333.9
160.0
381.6
180.0
429.3
200.0
477.0
Switch Code
A
B
C
D
E
F
G
H
4-3
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