Product Description:

The PST6100.114-L belongs to the PST Thyristor Power Units series manufactured by Bosch Rexroth Indramat. As a thyristor-based power module, it regulates DC pulses sent to machine transformers, providing controlled energy delivery for automated welding or heating stages. This controlled output helps maintain repeatable pulse energy during resistance welding cycles and similar heating processes. The module operates from a 24 V DC control supply and includes an integrated 24 V timer circuit, allowing low-voltage PLC signals to coordinate trigger timing and pulse duration directly.

This unit is built for a nominal system current of 130 A, allowing stable conduction through its silicon controlled rectifiers during normal load peaks. It can feed transformers up to 76 kVA without exceeding semiconductor limits, which suits medium-power work cells. Internal losses are limited to 70 W, so cabinet airflow must remove heat effectively and prevent internal heat buildup. Rated for a duty cycle of 50%, the controller can conduct during half of each operating period without thermal overstress. The enclosure is rated IP20, which helps protect against accidental finger contact with live parts, and the surrounding air must not exceed 55 °C before derating is required. Air cooling is used as the standard method, overvoltage transients are suppressed by an MOV network, and the onboard thermal sensor reports temperature status to the control system.

The incoming cooling air must remain below 45 °C so the heat sink can keep semiconductor junction temperatures within a safe range. Installation altitude is limited to 2000 m, which helps maintain adequate dielectric strength and natural convection. Power and load terminals accept copper conductors up to 50 mm², matching the current path while helping reduce resistive connection losses. This conductor capacity also supports secure termination on the power and load side without forcing unnecessary cable reduction. With a total mass of 12.5 kg, the unit mounts on standard backplates and relies on integrated temperature monitoring to support shutdown if operating conditions move outside the permitted range.