Chromalox's heater controller provides small footprint

Pittsburgh, Pa. - Chromalox reports its recently introduced MaxPac compact silicon-controlled rectifier (SCR) power controllers have a footprint approximately 30% smaller than competing systems.


Pittsburgh, Pa. - Chromalox reports its recently introduced MaxPac compact silicon-controlled rectifier (SCR) power controllers have a footprint approximately 30% smaller than competing systems. The firm says this makes the controllers especially well suited for embedded OEM applications.

MaxPac includes controllers for single-phase, three-phase/two leg, and three-phase/three leg configurations. They provide power control output of 120-575 V ac at 100-1200 A and are suitable for high-power resistive or infrared heating in industrial applications.

MaxPac controllers also feature a temperature warning and shutdown system. When an electronic temperature sensor on the heat sink registers an overheating condition, users are notified via a contact closure. If the condition worsens, the system will shut down automatically. Chromalox states this approach allows earlier corrective action.

The controller's optional plug-in card for shorted SCR detection has an auto-configuration feature, which provides detection of shorted SCRs and the circuit legs where they're located. Other safety features include input-to-output isolation, transient over-voltage protection and remote shutdown capability. On controllers rated up to 650 A, safety is further enhanced with grounded heat sinks.

Users can choose between on/off or proportional control, and they can also use Chromalox's demand oriented transfer (DOT) firing. DOT firing is designed for applications where consistent heater/process temperature is critical. It switches the fewest number of cycles to provide the most precise zero crossover control. For example, at 50% output, the unit's output alternates between three electrical cycles on and three electrical cycles off. At 51%, the output continues with three cycles on/off, and gradually integrates extra 'on' cycles for the additional 1%.

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
Engineering Leaders Under 40; System integration improving packaging operation; Process sensing; PID velocity; Cybersecurity and functional safety
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
click me