Rittal Maxi-PLS & Flat-PLS High-Current Busbar Systems (up to 6300 A)
Heavy-duty high-current main busbar platforms engineered for VX25 Ri4Power switchgear, delivering certified short-circuit withstand up to 120 kA (1s) and rated currents up to 6300 A.
- Rated Current (In)
- Maxi-PLS: 1600 A to 4000 A
- Rated Short-Time Withstand (Icw)
- Up to 120 kA (1 s)
- Busbar Profile Engineering
- Maxi-PLS specially contoured E-Cu profile with T-grooves; Flat-PLS up to 4x 120x10 mm laminated copper bars
- Switchgear Enclosure Integration
- Designed for VX25 Ri4Power low-voltage switchgear assemblies (Form 1 to Form 4b to IEC 61439-1/-2)
- Busbar Locations
- Top roof section, rear upper/lower section, or vertical distribution busbar zone
- Connection Technology
- Drill-free T-head bolts for Maxi-PLS; heavy-duty clamping claw brackets for Flat-PLS with calibrated torque indicators
High-Performance Main Busbar Architecture for Heavy Industry
In power utility substations, data centers, steel mills, and chemical plants, main low-voltage switchgear must endure immense electrical currents and massive electrodynamic short-circuit stresses. The Rittal Maxi-PLS and Flat-PLS high-current busbar platforms deliver the ultimate solution for heavy industrial power distribution up to 6300 A.
Maxi-PLS: Specially Contoured Copper Busbar Profiles
The Maxi-PLS system (available in Maxi-PLS 45, 1600/2000 A and Maxi-PLS 60, 3200/4000 A) utilizes an engineered hollow copper extrusion featuring longitudinal T-grooves on all four sides. Conductor connections, incoming Air Circuit Breaker (ACB) busbars, and outgoing cables attach directly using high-tensile T-head bolts that slide smoothly into the profile grooves, ensuring massive contact surface pressure without requiring any bar drilling.
Flat-PLS: Modular Flat Bar Systems Up to 6300 A
For applications demanding maximum power throughput up to 6300 A, the Rittal Flat-PLS system employs parallel multi-laminated copper flat bars (up to 4 x 120 x 10 mm per phase). The reinforced busbar supports are injection molded from halogen-free, self-extinguishing thermoset plastic, capable of withstanding destructive short-circuit faults up to 120 kA for 1 full second and dynamic peak forces up to 264 kA.
Type-Tested Integration in VX25 Ri4Power
Maxi-PLS and Flat-PLS integrate seamlessly into the VX25 Ri4Power enclosure system. Positioned in the top, rear, or vertical busbar chambers, they support internal form separation Form 1, Form 2b, Form 3b, Form 4a, and Form 4b according to IEC 61439-1/-2. Standardized ACB and MCCB connection kits for ABB Emax, Schneider MasterPact, and Siemens Sentron guarantee full type-test compliance without bespoke fabrication.
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