On-Winding Overheat Protection
Klixon SL-11 kits are mounted on the windings of general purpose motors and
hermetically sealed compressors. They supplement conventional current
overload relays in magnetic starters providing modern total protection for most
older motors in use today.
Features:
• Allow motors to perform at full-load capacity but will protect against dangerous running overloads
• Protect against blocked ventilation, high ambient temperatures, single phasing
• Each kit contains three matched motor-winding thermostats
• When starter overloads operate, the SL-11 will protect against re-starting at unsafe winding temperatures if the starter overloads rese when the motor is still too hot
• These motor winding thermostats do not replace overloads in the starter
• UL & CSA listed
Installation:
SL-11 thermostats are tied in place on the end turns of appropriate winding
bundles, one to each phase or buried in the windings during motor rewind.
They are connected in series between the starter coil and its power supply.
Selection:
• Pick thermostat temperature to operate at the mid-point between the “maximum normal running” temperature and the “maximum allowed running temperature.”
• Subtract the gradient temperature (outlined in the chart below) from the mid-point to obtain the operating temperature of the thermostat.
