Thermon Heat Tracers Pvt. Ltd. Manufactures Power-Limiting Heating Cables for Freeze Protection. Thermon Heat Tracers Pvt. Ltd is an ISO 9001 certified company. The Company also manufactures various types of wires and cables. The Power-Limiting Heating Cables for Freeze Protection, also known as HPT ™ , is designed specifi cally for process temperature maintenance or freeze protection where high maintain temperatures or high temperature exposure is required. The Power-Limiting Heating Cables for Freeze Protection withstands the temperature exposures associated with steam purging. This Cable has a coiled resistor alloy heating element which provides the power-limiting feature. The composite construction of the heating element and fibre substrate, plus an additional fibre cushion layer, provides an exceptionally durable high performance heating cable. This Cable has an Operating Voltage of 230 VAC and Maximum Maintenance Temperature of 149 Degree C.