Opportunity

An aerospace manufacturer needs to control air temperature into a low speed acoustic chamber. The system presently consists of eight each 77 kW duct heaters running on 480Vac which are manually controlled with switches. The customer wants to change to automatic control and have data logging via a computer.

Problem

A new air filtration system installed down flow from the duct heaters will require the maximum air temperature to be controlled. Testing has shown that the heaters will exceed the maximum temperature on start up. Heat up time needs to be as short as possible. In addition, all eight heaters are to be controlled as a single zone and the customer wants to use solid state power controls. The controls need to be provided in a UL listed panel.