SHMS busbars

The SHMS busway consists of sections of various configurations. A busway section (Fig. 1) consists of parallel copper or aluminum insulated rectangular conductors enclosed in an extruded aluminum housing with cooling fins. The absence of air gaps between the conductors reduces inductive resistance and improves the system's heat dissipation. Busway sections are manufactured with a maximum length of 4 meters.

In the SHMS busway, all conductors are insulated with Mylar film. The insulation has high chemical resistance, is non-flammable, provides excellent electrical insulation, and protects the conductors from moisture and air contact. The joint design of the busway sections allows compensation for construction tolerances.

Fig. 1. SHMS Busway Sections

Sections are joined together (Fig. 2) using a special set of connecting plates and insulating partitions fastened with screws (for a more detailed description of the joining process, see the catalog on p. 55).

Fig. 2. SHMS Busway Section Connection

For connection to various electrical equipment, special so-called terminal sections are manufactured (see Fig. 3). Terminal sections can be made in different configurations depending on project requirements. The contacts of terminal sections have holes for bolted connection to electrical equipment (for more detailed description, see catalog pp. 48–50). For connecting busway sections to each other, no holes in the contacts are required.

Fig. 3. SHMS Busway Terminal Sections

To compensate for thermal expansion of the busway, special "compensation sections" are used (see Fig. 4). The average installation interval is 40 meters for busways with copper conductors and 35 meters for busways with aluminum conductors. The exact placement is determined according to the specific route configuration of the project.

Fig. 4. SHMS Busway Compensation Section

The busway can additionally be equipped with cabinets containing current and voltage transformers, branch devices for cable connections, and protective covers with busbars and compensators for connecting the busway to the outputs of transformers and low-voltage switchgear cabinets (LVSG). The list of busway components is determined by the assembly drawing of the route developed for the specific facility. Upon customer request, the busway contacts can be coated with tin, nickel, or silver.