Bulletin No. 30072-013-01
Short Circuit Protection
be loose and not quite in place, grasp the coil firmly and slide it down toward the
armature. Magnet will then fall in place.
Before installing the cover, manually operate the device as described in "Manual
Operation" to insure that all parts are functioning properly.
Figure 1 shows how contactors and starters are assembled Factory recommended
torque for mechanical, electrical and pressure w ire connections are listed in Table 2
and m the device instruction sheet. These torques must be followed to insure proper
Table 2. Factory Recommended Tightening Torques
Provide branch-circuit overcurrent protection for starters, referring to instructions
supplied with the thermal unit selection table Provide branch-circuit overcurrent
protection for contactors (Class 8502 or 8702) in accordance with the National
Electrical Code Do not exceed the maximum protective device ratings listed in Table
Table 3. Maximum Ampere Ratings
Series impedance and shunt capacitance of the control circuit must be considered to
assure proper operation of contactors and starters when controlled from remote
operator stations. Depending upon the voltage, wire size and number of control
wires used, series impedance or shunt capacitance may limit the maximum distance
of the wire run. If distances to start or stop stations are longer than those listed In
Table 4, the wire-run configuration and materials must be analyzed. For further
information, contact your local Square D field office for Product Data Bulletin M379.
© 1992 Square D All Rights Reserved
* Revised 1/92