ABB SDCS-FEX-2A 3ADT311500R1 Power Board

ABB  SDCS-FEX-2A 3ADT311500R1  Power Board
• Half-controlled thyristor/diode bridge (1-Q)
• Microprocessor control, with the electronic system being supplied by the armature-circuit converter.
• Construction and components have been designed for an insulation voltage of 600 V AC.
• Fast-response excitation is possible with an appropriate voltage reserve; de-excitation takes place by field time constant.
The field supply units’ insulation voltage is higher than the rated operating voltage (see Chapter Field supplies), thus providing an option in systems of more than 500 V for supplying the power section of the converter directly from the mains for purposes of armature supply, and using an autotransformer to match the field supply to its rated voltage. Moreover, you can use the autotransformer to adjust the field voltage (SDCS-FEX-1 diode bridge) or to reduce the voltage ripple. Different types (primary voltages of 400...500 V and of 525...690 V) with different rated currents each are available.