S&C Instruction Sheet 1045M-510
25
Installing the Rotating Switch Operator
If the
Closed Torque
setpoint is not modified, the torque after a normal
Close
opera-
tion equals the reference value. If a higher value is selected for the
Closed Torque
set-
point, the switch operator adjusts the final
Closed
position, based on the overall spring
constant, to obtain the desired closed torque.
NOTICE
Adjusting the load resistor only affects low-speed jogging. The mechanical
resistance is easily overcome during normal, high-speed operation.
Also, if additional torque on the control rod at the end of a normal,
high-speed close operation is desired, select a new value for the
Closed Torque
setpoint on the
Setup>General>Switch Operator
screen rather than adjusting the
load resistor.
Table 2 shows the possible resistor settings and the corresponding closed-reference
torque values.
Table 2. Load Resistor Closed Reference Torque
Resistor Turns
Closed Reference Torque (ft-lb)
6 (minimum value)
208
7
180
8
158
9 (factory setting)
141
10
128
11
117
12
107
13
99
14
93
15
87
16
81
17
77
18
73
19
69
20
66
