R911170472
The R911170472 (PST6250.333-L), a thyristor power unit with incorporated control function by Bosch Rexroth Indramat, is specifically designed to connect metal welding transformers in industrial setups. Its utilization should be restricted to proficient technicians and engineers. The unit is equipped with a BOS-500 operator interface for swift operation, programming, and diagnostic procedures. Enhanced welding quality is facilitated by its task-specific functionality. Other notable features include an air cooling system, separate monitoring and control functions, Fieldbus interfaces for seamless communication, an integrated weld timer, and a thermostatic switch to prevent overload.
This power unit, when used in conjunction with welding transformers and weld timers, facilitates alternate current resistance welding. Its inbuilt monitoring functions ensure high reliability, enhancing performance levels. Malfunctions can occur if current parameters exceed the maximal pre-determined bounds, if mains voltage surges, with incorrect electrical connection or insufficient cooling. However, built-in LEDs help in easy identification of such malfunctions. The unit operates optimally at a temperature of 55°C, can endure storage temperatures between -25°C to 70°C, and functions up to 2000 meters above sea level, with maximum permissible relative humidity of 90%. Its protective casing is of IP 20 category, making it vulnerable to water and extrinsic objects. Hence, it should be installed in a switchgear cabinet of IP 54 category with air cooling of up to 45°C. The unit weighs around 12.5 kg.
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