PST6100.142-L Bosch Rexroth Indramat
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MPN: 1070079354
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The Bosch Rexroth Indramat PST6100.142-L is a thyristor power unit from the PST Thyristor Power Units series with a control supply of 24 V DC and a maximum transformer rating of 76 kVA. It features air cooling, a recessed mounting style, and is protected to the IP20 standard. The unit supports a maximum duty cycle of 50 percent and is equipped with overvoltage protection using an MOV.
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Product Description:
The PST6100.142-L is a thyristor power unit produced by Bosch Rexroth Indramat within the PST Thyristor Power Units series. Installed in resistance-welding or heating cabinets, it phase-controls mains voltage so downstream transformers receive regulated energy without mechanical contactors. By gating its semiconductor stack in response to an external control signal, the unit helps automation systems adjust power in real time while limiting inrush current and extending transformer life. Because regulation is handled electronically, output can be adjusted without the switching wear associated with mechanical contact devices.
The cabinet dissipates 70 W of internal loss, so airflow must be arranged accordingly. A separate control supply of 24 V DC energizes the firing electronics and allows isolation from the power path. Operation is permitted up to an ambient temperature of 55 °C; above this temperature, derating is required. Duty is limited to a maximum of 50%, so continuous conduction must be followed by a cooling interval. Installation is permitted up to 2000 m above sea level, where reduced air density at higher elevations can lower current capability. The unit uses box terminals for the main connections and relies on air cooling drawn through cabinet louvers to remove generated heat. Separating the control supply from the power path also supports stable control operation during switching cycles.
Cooling air entering the power section must not exceed 45 °C to keep the heat-sink junction temperature within safe limits. Mains conductors up to 50 mm² fit into the main terminals, matching typical feeder cross sections for its maximum transformer load of 76 kVA. The housing is rated IP20, so it is intended for recessed mounting inside closed panels. Metal-oxide-varistor overvoltage protection clamps line surges, and the recessed mounting frame requires at least 100 mm of clearance for exhaust air. An integrated timer circuit supports cycle-based power sequencing in automated cells, which helps coordinate repetitive heating or welding intervals with the external control system.
Frequently Asked Questions about PST6100.142-L:
Q: How is the PST6100.142-L power unit cooled?
A: The PST6100.142-L unit uses air cooling to maintain operational temperature.
Q: What is the highest ambient temperature in which the PST6100.142-L can operate?
A: The PST6100.142-L is rated for a maximum ambient temperature of 55°C.
Q: What type of overvoltage protection is included on the PST6100.142-L?
A: This unit has overvoltage protection provided by an MOV (Metal Oxide Varistor).
Q: What is the maximum transformer rating for the PST6100.142-L?
A: The maximum transformer rating compatible with this unit is 76 kVA.
Q: What type of connection does the PST6100.142-L support?
A: The PST6100.142-L utilizes a box terminal connection type for its wiring.
