Constant Wattage Cables | Nelson Heat Trace | NC Trace Heater Cables

Product Overview

constant wattage cables – Trace Heating

Nelson Heat Trace NC constant wattage trace heating cables provide process temperature maintenance and frost protection to pipework, instrument lines, tanks and drums up to 204ºC. The Nelson Heat Trace NC heater cable is available in power densities from 1.5 to 12 watts per foot and is suitable for facilities which use super-heated steam to flush and clean pipes.

The NC trace heating cable is ideally suited for process temperature maintenance applications with product pipelines, process water, dust suppression systems, lube oil, condensate return. It can also be used for structure de-icing.

constant wattage cable – Operating Principle

• Parallel bus wires supply voltage along the entire length of the trace heating cable
• A resistance wire heating element is wrapped spirally around the bus wires, contacting alternate bus wires at specific intervals to form ‘heating zones’
• This series of parallel heating zones provides a constant power output for each zone, regardless of where the cable is cut along the length of the bus wires
• Each cable construction has the heating zone resistance sized to provide multiple power ratings when used on different voltages
• This variation is accomplished using different spiral wrap spacing and heater zone lengths
• There is no change of power output as the temperature changes, giving a steady power output anywhere in its recommended operating range