Caledon Controls Ltd - Thyristor Load Sequencing Controllers

Caledon Controls design and manufacture medium and high power Thyristor stacks and controllers for industrial heating applications, together with a range of supporting instrumentation, including load sequencing controllers and single cycle controllers.

Our primary markets are in industrial furnaces and ovens, process heating and petrochemical applications. Other areas of application are heating and ventilating, plastics forming, dryers, etc.

Our standard Thyristor stack ranges include models for controlling straightforward resistive loads, or for transformer coupled and complex loads. Current ratings are from 63A to 1100A, and there are versions for three phase loads (with either 2-leg or 3-leg control) or single phase loads.

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Control modes available are:-

• Burst fire for resistive loads.
• Single cycle burst fire - for fast response resistive loads, silicon carbide loads, etc.
• Soft start burst fire - for transformer coupled loads.
• Phase angle - for transformer coupled loads or where current or voltage limiting is required.

Our patented single cycle control algorithm maintains 3-phase load balance when used with 2-leg control. Our load sequencers are suitable for up to 11 stages of heating in large process heating systems, and offer a wide range of control strategies.

Caledon Controls have been designing and manufacturing Thyristor controllers since 1993. We are an ISO 9001 - 2000 registered firm, covering 'Design and Manufacture of Control Products and Systems' and our installed base of equipment is world wide.

Our company philosophy is to offer our customers:-

• A responsive personal service.
• Direct access to design and applications knowledge and expertise.
• Reliable products, type tested, and carefully built.

Comprehensive information on all our products, including application notes, data sheets and manuals, is freely available on our website. If you require further information or applications advice please do not hesitate to contact us direct, either by telephone or e-mail.

Please contact us for more information