Power products for electrical heating or other switching applications

By: Eurotherm Life Sciences  09-12-2011

For the control of electrical heating or other switching applications, here you will find a range of Solid State Relays (SSR) and Power Controller assemblies to suit every need:

  • Constant load

  • Variable resistance

  • Inductive load

  • Transformer coupled

  • Single Phase

  • Three Phase

  • Multi Phase

  • Application specific units can range up to several thousand amps with external driver options

Choice of optimum firing mode

Thyristors can deliver power in long or short bursts - even down to one cycle of the supply voltage - in order to precisely control the load and match heater requirement exactly.

Alternatively, phase angle firing is more traditionally used for inductive or transformer coupled loads or applications where current limiting is required. This tight control of delivered power gives accurate control which results in improved product quality. Additionally, the thyristor's ability to switch rapidly reduces the thermo-mechanical stresses on the heater elements resulting in less downtime, lower maintenance costs and better ageing of the load.

Digital communications

Many of the power controllers support digital communications.  Adding digital communications to thyristor units introduces further sophistication into process management. This enables digital accuracy in downloading setpoints, complete diagnostics of the load and is ideal for large, multi-zone installations.

The need for calibration of analog signals is eliminated and wiring is reduced since only a single digital link is needed to connect all zones to a central programmer. Digital communications also enables logging of process parameters, energy consumption, abnormal conditions, faults and alarms.

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