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Taking Compact to a Whole New Level with the Wöhner Bus Bar System

Wohner OMUS 60mm Classic Busbar System
Taking Compact to a Whole New Level with the Wöhner Bus Bar System
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Sprecher + Schuh has an agreement with Wöhner USA to sell 3-phase bus bar systems. The 60mm bus bar system eliminates traditional components like power distribution blocks, individual conductors, wiring duct, wire markings and cable ties, as well as dramatically reducing labor to design, lay-out and assembly of a multi-starter panel. Most panel builders recognize the 60mm system as the next logical step in the transition from NEMA Motor Control Centers to multi-starter control panel assemblies. Space is money when you start talking about a motor control center or a floor mounted multi-starter panel. We decided to test just how effective the Wöhner bus bar system would be with 7 wall mounted starters or other loads and built one for demonstration purposes.

We selected a 30” X 20” x 8” Type 4 enclosure to house our bus bar system. Included in the panel is a 150 amp molded case breaker for feeder circuit protection and panel disconnect, as well as a 150 5VA control power transformer with primary and secondary protection. The motor loads included one each of a 30HP, 15HP, 10HP, 5HP, 3HP and 1HP motors in addition to one lighting load. We used KTA7-45H for the 30 HP, a KTA7-25H for the 15HP load, and four KTA7-25S Type E self-protected Combo motor circuit controllers for the other motor loads. Also included were CA7 contactors with multifunction buttons on the front of the enclosure. The lighting load is supplied by a 15amp KTU7 molded case circuit breaker plus a CAL7 lighting contactor.

Whoner 60mm Busbar modules for use in space saving multiple component applications

We sent our load requirements to Wöhner and they came back with a dimensioned CAD layout and a list of required parts the very next day. All seven loads fit on one 418mm wide bus bar system. Mounting the Wohner busbar supports required only four drilled holes. We laid the bus bar in place and tightened the four screws holding the top half of the support, then installed the other components right onto the busbar.  It is important to note that the KTA7 or the KTU7 compact bus bar would have been only partially effective in this application. Since one load used the KTA7-45H, a distribution block would have been required to use compact bus bar. This was not needed because the Wöhner bus bar system effectively distributes power to all the components simultaneously. Design time was minimized and labor was seriously reduced with the use of the Wöhner system. Finally we used an Auer tower light in a T-configuration on the top of the demo panel, just to show we could!

Sprecher & Schuh demo panel showing Wohner 60mm busbar system in use
Wohner 60mm Busbar system layout for Sprecher & Schuh demonstration panel

This is an extremely cool demo panel with the Auer tower strobe lights! What is really impressive was our ability to stuff seven loads along with the main disconnect and CPT into this small space. Don’t forget we help design and sell Wöhner bus bar systems. Give us a try on your next multi-starter control panel.

For additional information please contact your nearest authorized distributor, sales representative, or call our customer service or technical support lines.