S&C 6801M - Installing the Rotating Switch Operator; Load Resistor Torque Settings

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.
N OTICE
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