ZF – Thristor Power Controls

Caloritech™ ZF Thyristor Power Controls (SCRs) are solid state switches that can open and close silently and as frequently as the control device dictates (even many times per second). This fast switching does not affect the life of the device as there are no moving parts. Besides improving process control, the fast switching will extend heater life.

Heaters will normally stabilize at actual requirements rather than continuously cycling between off and maximum output. For most process applications, zero voltage switched SCRs are preferred. This type produces minimal voltage spikes that may cause radio frequency interference (RFI). Phase angle fired units are available as an option for low mass heating sources that can change temperature rapidly – such as infrared lamps.