The KP Thermostats are temperature controlled electrical switches.
All KP Thermostats have a single pole double throw (SPDT) changeover switch.
The position of the switch depends on the temperature control setting and the bulb temperature.
A KP Thermostat can be directly connected to
single-phase a.c. motors of up to about 2.7 HP,
or installed in the control current circuit of d.c
motors and large a.c. motors.