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Caledon Controls Ltd
CB17-2 Thyristor Controller with single cycle operation
This controller is available in versions for panel mounting or mounting on T35 DIN rail. It is primarily intended for the control of 3-phase loads in single cycle burst fire mode. It is designed to accept a standard analogue control signal from a temperature controller and its output is a standard logic signal. The output may be used with solid state relays, thyristor stacks which accept a 'logic' input signal, or in conjunction with associated trigger modules to drive thyristor gates directly. In all cases the firing circuit must be designed for zero voltage switch on.
This controller is widely used in process control applications and in the petrochemical industry. It is also useful for controlling infra-red heating loads, and loads which use silicon carbide elements.
Single cycle burst fire control is used when minimum fluctuation in heater element temperature between bursts is required, without the high harmonic distortion associated with phase angle control; eg for near infrared heating, or when using silicon carbide hot rods. It is also useful if a system is powered by a gen-set, when standard burst fire control can result in speed instability.
The following are examples of applications to which this versatile controller is suited:-
More detailed product information is available on our downloads page
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