The atg airports Micro 100 CCR has been designed with a micro-controller integrated with an analogue control and protection loop, controlling an anti-parallel pair of thyristors to give phase angle control.
Each atg airports Micro 100 (CCR) is a self contained cubicle divided into four main compartments.
“Microcontroller and Display” compartment constitutes a PCB Sub-assembly using a microcontroller to allow parameterisation of the CCR characteristics and display of monitored and alarm information. All of the electronic sub-assemblies in this section are accessible from the front of the CCR cubicle.
The “Analogue Electronic” compartment includes the main control PCB associated with the feedback controller, error amplifier, thyristor triggering circuit, lamp failure detection and earth fault detection. In this section components are accessible from the front of the CCR cubicle.
The “Power” compartment positioned at the rear of the CCR contains all power components connected to the CCR output current loop such as Thyristor Stack, Main Contactor, Main Transformer, Lightning Arrestor, Feedback Transformers, Fuses, Filters and Cable Terminals. The components in this section are accessible from the rear of the CCR cubicle.
The “connection” compartment allows for connection to input terminals and access to fuses without the need to access the power compartment. It is accessible at the rear of the cubicle.