Thermotrace Self-Regulating Tracer – STF

Thermo Trace self-regulating cables-STF are a reliable solution for process temperature maintenance on process pipelines, vessels, tanks, equipment, and more. These cables are designed to adjust their heat output based on the surrounding temperature, ensuring that the desired temperature is maintained for optimal operation. Thermo Trace self regulating cables can be used for process temperature maintenance on process pipelines, vessels, tanks, equipments etc.
With advanced insulation options like Fluoropolymer,these cables offer excellent thermal performance and can withstand extreme temperatures and harsh environments. They are easy to install and require minimal maintenance, making them a cost-effective choice for businesses. Thermo Trace self-regulating cables-STF provide efficient and dependable performance, ensuring the smooth operation of critical systems in various high-temperature applications.

Operating Principle

Selftrace derives its self-regulating characteristic from the inherent properties of the semi-conductive core material.

As the core material temperature increases, the number of conductive paths in the core material decreases, thus decreasing the heat output. As the temperature decreases, the number of conductive paths increases, causing the heat output to increase. This occurs at every point along the cable’s length, adjusting the power output to the varying conditions. As the cable self-regulates its heat output, it limits the maximum sheath temperature, thus making it burn-out proof.

Features
Compliance	Standards: EN 60079 – 0, IS/ IEC / EN 60079 – 30 – 1 & EN 60079 – 31
Approvals	Tested by Central Institute of Mining and Fuel Research (CSIR-CIMFR), Dhanbad and approved by Petroleum and Explosives Safety Organization ( PESO), Nagpur, India for Zone II , TI (ATEX) for Zone I / Division II & EAC for use in hazardous area applications
Safety	As the Cable self regulates its heat output, its limit the maximum sheath temperature, thus making it burnout proof
Cost-effective	Controlled and self-regulating type provides heat when required, resulting in optimal heat utilization and save on energy cost.

Specifications
Catalogue Reference	STF10	STF15	STF20	STF25	STF33
Heating Power W/m (230V AC) at 10^oC	10	15	20	25	33
Voltage Supply	230/240 VAC, 50/60 Hz, 110/120VAC on request
Max. Operating Temperature	65⁰C
Max. Exposure Temperature	85⁰C
Min. Installation Temperature	– 65⁰C
Minimum Bending Radius	25 mm

#Thermopads reserves the right to modify the specifications in line with future improvements, updated standards or updated certifications.

STF Power Output Characteristics

Circuit Breaker Selection and Maximum Circuit Lengths

Catalog Number	Output at 10° C, 230V	Maximum Circuit Length	Circuit Breaker Size	Maximum Maintenance Temperature (°C)	Maximum Exposure Temperature(°C)
STF 10	10 W/m	205	16A	65°C	85°C
STF 15	15 W/m	205	16A	65°C	85°C
STF 15	15 W/m	205	16A	65°C	85°C
STF 20	20 W/m	116	16A	65°C	85°C
STF 20	20 W/m	140	20A	65°C	85°C
STF 25	25 W/m	88	16A	65°C	85°C
		117	20A	65°C	85°C
		120	25A	65°C	85°C
		126	30A	65°C	85°C
STF 33	33 W/m	70	16A	65°C	85°C
		90	20A	65°C	85°C
		99	25A	65°C	85°C
		108	30A	65°C	85°C

Range

TYPE	Nominal output	Dimensions approx.
STF-10-AZ	10W/m @ 10⁰C	6.50 x 12.00 mm
STF-10-BZ	10W/m @ 10⁰C	6.50 x 11.20 mm
STF-10-BF	10W/m @ 10⁰C	5.50 x 10.20 mm
STF-15-AZ	15W/m @ 10⁰C	6.50 x 12.00 mm
STF-15-BZ	15W/m @ 10⁰C	6.50 x 11.20 mm
STF-15-BF	15W/m @ 10⁰C	5.50 x 10.20 mm
STF-20-AZ	20W/m @ 10⁰C	6.50 x 12.00 mm
STF-20-BZ	20W/m @ 10⁰C	6.50 x 11.20 mm
STF-20-BF	20W/m @ 10⁰C	5.50 x 10.20 mm
STF-25-AZ	25W/m @ 10⁰C	6.50 x 12.00 mm
STF-25-BZ	25W/m @ 10⁰C	6.50 x 11.20 mm
STF-25-BF	25W/m @ 10⁰C	5.50 x 10.20 mm
STF-33-AZ	33W/m @ 10⁰C	6.50 x 12.00 mm
STF-33-BZ	33W/m @ 10⁰C	6.50 x 11.20 mm
STF-33-BF	33W/m @ 10⁰C	5.50 x 10.20 mm