Electric Duct Heater Scr Control

Scr pictured solid state relays are used to provide continuous modulation.

Electric duct heater scr control.

This gives smooth infinitely variable application of power to the heaters. Our heaters and controls range from standard duct heaters to the most sophisticated custom designed comprehensive systems. Fuses to protect each circuit in any heater drawing more than 48 amps. Phase angle fired zero voltage switched and on off control.

When interruption of power occurs all stages cycle off. Capacity and stages are dependent on voltage phase and heater dimensions. A silicon controlled rectifier scr is a solid state switching device which can provide fast infinitely variable proportional control of electric power. Scr power controllers are designed for an accurate and cost effective way to modulate electric heat.

Since the scr is solid state it. Heavy gage g60 construction with hinged access cover. The scr control can deliver electrical power to heaters in several ways. An electronic step controller provides electronic sequencing control of an electric duct heater up to 12 steps.

This duct heater features. Upon restoration of power the step sequence resumes. Price electric coils are factory mounted etl listed to meet electrical safety standards and comply with dual designation csa 236 ul 1995. These controls proportionally turn on a percentage of each power line half cycle.

A transformer with any overcurrent protection required by ul or the nec to supply the internal control circuit of 120 volts per heater with a step controller for vernier control and 24 volts for all other heaters with scr control. Manual reset thermal safety switch for secondary over temperature protection. Standalone coils supplied as duct heaters are certified in compliance with ul 1996. Indeeco s attention to detail and rigorous testing give worldwide customers premium products that they receive quickly and at a fair price.

Automatic reset thermal safety switch for primary over temperature protection. Not only does this give maximum control of your heat process but it can extend heater life many times over other control methods. Viconics r820 scr power controller has been designed for safe and reliable control of electric heat loads. Electric reheat coils are an available accessory for use with price single duct and fan powered terminal units.

Scr power control in depth. Power and control terminal boards.