THE ULTIMATE SAFETY THERMAL CONTROL

Self-Hold thermal controls refuse to close a potentially dangerous circuit until manually reset. These ultra-safe thermal controls are, therefore, niche products for those applications where circuit safety is an absolute must.  Motors and pumps are the most frequent users since both will overheat of some type of blockage prevents their engagement creating a situation where heat builds up in an overloaded circuit. 

Self-Hold thermal controls were built for these type of situations.  They include an internal heat source that forces the circuit to remain open until the thermal control is unplugged or otherwise disconnected from the power source.  These newer type of thermal controls work like any other type of bimetal thermal control by interrupting an electrical load when it exceeds a preset temperature.  The internal heat source keeps the circuit open until the power source is removed, allowing the load to decrease and the temperature to fall.  Once the temperature falls to a preset temperature, the internal heat source will turn off cooling the bimetal internal component holding the circuit open it straightens and reestablishes the circuit. 

PEPI® has been a leader in the development and manufacture of Self-Hold thermal controls and have models tested and available for circuits ranging from 5 to 15 amps and 120 to 250 VAC.  To view the range of PEPI® options visit: http://pepiusa.info/products/#self-hold