A Thyristor unit is a semiconductor device, which acts as a switch formed by two silicon controlled rectifiers (SCR) in antiparallel. The benefits of thyristor units compared with electromechanical contactors are numerous: no moving parts, no maintenance and capacity to switch very fast. Thyristor is the only solution to control transformers and special loads that change resistance with temperature and with age.
Thyristor units are configurable via serial communication port for different types of input and firing modes.
RS485 communication and HB alarm are standard features.
Current transformer is included in 3.5A model, for other models are mounted outside.
Universal input and firing are customer configurable via serial port. Single cycle, burst firing and phase angle can be configured adding also Soft Start facility. The change from one to the other firing can be done via serial port with PT1000 in ON condition.
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