VIEWS: 18 PAGES: 2 POSTED ON: 2/13/2011
Parallel Trace Heating self-regulating electrical trace heating Electrical trace heating is applied to maintain temperatures of vessels, pipes, valves, gutters and instrument panels. It is widely used in various industries for freeze protection, preventing chemicals from crystallizing or solidifying, maintaining low viscosity for easy pumping and to maintain liquids at optimum process temperatures. It is used in cabinets and instrument panels to prevent condensation and to prevent drain pipes and doors in refrigeration plants from freezing up. Trace heating cable is normally applied to the outside surface of the container/pipe which is then covered with insulating material. Certain types can also be immersed into liquid. Parallel trace heating cable Parallel trace heating cable consists of two parallel conductors (phase, neutral) with a conducting material in between. The conducting material produces even heating power (Watts/m) over the entire length of the cable. On modern cables the resistance of the material increases as the operating temperature rises, resulting in a reduction of heating power. It is thus termed self regulating trace heating cable. For safety reasons it is not recommended to exceed the design wattage. The advantage of this cable is that it can be cut to any length with the termination being at one end of the cable and is easy to terminate 41 Electrical trace heating Parallel trace heating cable (self-regulating) ELSR--BO (BOT) Overjacket Earth braiding, tinned copper Insulation Self-Regulating heating element 1,25 mm2 Buswires ELSR--AO Overjacket Earth foil, aluminium Insulation Self-Regulating heating element 1,25 mm2 Buswires ELSR-N ELSR-H 51 70 Loading (W/m) Loading (W/m) EL 48 SR 45 - N- 60 40 42 EL 39 SR -H- EL 60 36 SR 50 -N 33 -3 ELS 0 R-H 30 EL -45 SR 40 -L- 27 25 EL 24 SR -N 30 ELSR 21 -2 -H-30 0 18 15 20 ELSR EL -H-20 SR 12 - N- 10 9 10 ELSR-H-1 0 6 3 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 10 20 30 40 50 60 70 80 90 100 110 120 Surface temperature on insulated metal pipes (°C) Surface temperature on insulated metal pipes (°C) ELSR-L/N ELSR-H Max. Exposure Temperature (unpowered) 80°C 200°C Max. Exposure Temperature (powered) 65°C 120°C Nominal Voltage 230V 230V Minimum bending radius 25mm 25mm Standard stock items: stock code description self regulating parallel heat tracing cable: 55°C (Powered) RHD-ESR-R-27 27W/m at 0°C/ without braiding, circular 65°C (Powered) RHD-ELSR-L-25-P 25W/m at 10°C, plain RHD-ELSR-L-25-AO 25W/m at 10°C, with earth foil and overjacket, flat RHD-ELSR-N-30-P 30W/m at 10°C, plain RHD-ELSR-N-30-AO 30W/m at 10°C, with earth foil and overjacket, flat RHD-ELSR-N-40-P 40W/m at 10°C, plain RHD-ELSR-N-40-AO 40W/m at 10°C, with earth foil and overjacket, flat RHD-ELSRY0116A Termination Kit for ELSR-N (L) low temperature trace cable 120°C (Powered) RHD-ELSR-H-45-P 45W/m at 10°C, plain RHD-ELSR-H-45-BOT 45W/m at 10°C, with braiding and teflon overjacket RHD-ELSR-H-60-P 60W/m at 10°C, plain RHD-ELSR-H-60-BOT 60W/m at 10°C, with braiding and teflon overjacket RHD-ELSRY0116B Termination Kit for ELSR-H high temperature trace cable 42
"Parallel Trace Heating"