PST6100.333-L Bosch Rexroth Indramat
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MPN: R911170471
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The Bosch Rexroth Indramat PST6100.333-L is a thyristor power unit from the PST Thyristor Power Units series with a nominal system current of 130 Amps and a maximum transformer power of 76 kVA. It features integrated temperature monitoring, air cooled operation, and is protected to IP20 with MOV overvoltage protection. The unit is designed for a control supply of 24 V DC, supports a maximum ambient temperature of 55°C, and allows installation up to 2000 meters above sea level.
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Product Description:
The PST6100.333-L thyristor power unit belongs to the PST Thyristor Power Units series from Bosch Rexroth Indramat. It is intended to modulate the primary voltage of resistance-heating transformers, allowing closed-loop energy delivery in automated furnaces, dryers, and molding machines. By synchronizing its silicon-controlled rectifiers with the plant controller, the module provides phase-angle or zero-cross firing without the mechanical wear associated with contactors. This control method supports repeatable heater output in processes where thermal stability and cycle-to-cycle consistency are important.
Electrical performance centers on a nominal system current of 130 A, enabling the unit to switch up to 76 kVA of transformer power on a repetitive basis. A control supply of 24 V DC powers gate logic and the integrated temperature-monitoring circuit, while cabinet heat dissipation remains limited to 70 W during continuous operation. Because the assembly is air cooled, the internal fan maintains element temperature as long as the cooling air does not exceed the stated ambient limit. For batch processes, it can be run at a maximum duty cycle of 50%, which balances component stress with available thermal capacity. Power conductors land on a box terminal that accepts copper leads up to 50 mm², helping keep cabinet wiring direct and organized in compact enclosures.
The housing carries a degree of protection of IP20, so the unit must be mounted in a switch cabinet that excludes conductive dust and moisture. Reliable function is maintained up to a surrounding temperature of 55 °C and an installation height of 2000 m; beyond either limit, derating is required. Surge events on the mains are clamped by a MOV, preventing excess junction stress on the thyristor stack. Communication with the plant controller occurs through the INTERBUS timer channel, enabling centralized firing control without additional analog cards. This arrangement lets the power unit follow coordinated control commands while keeping the switching stage inside the cabinet.
Frequently Asked Questions about PST6100.333-L:
Q: What is the maximum transformer power capacity of the PST6100.333-L power unit?
A: The PST6100.333-L supports a maximum transformer power of 76 kVA.
Q: What control supply voltage does the PST6100.333-L require?
A: It operates on a control supply voltage of 24 V DC.
Q: What is the nominal system current for the PST6100.333-L power unit?
A: The maximum nominal system current for this model is 130 A.
Q: What cooling method is used by the PST6100.333-L thyristor power unit?
A: The PST6100.333-L uses air cooling as its cooling method.
Q: Does the PST6100.333-L include temperature monitoring?
A: This power unit provides integrated temperature monitoring.
