Busbar Support & MCB Channels
Busbar support systems and MCB mounting channels for panel busbar assemblies.
About Busbar Support & MCB Channels
Busbar supports hold the copper or aluminium busbars of a panel in position, keep the phases at a safe distance from each other and from the enclosure, and resist the forces that try to bend the bars during a short circuit. MCB channels — 35 mm DIN rails — carry the MCBs, relays and other modular devices inside distribution boards and control panels.
Microtech supplies Procom busbar support systems moulded from fibre-reinforced SMC and DMC compounds, which the manufacturer describes as non-hygroscopic and self-extinguishing. The range covers conical and hexagonal stand-off insulators with threaded metal inserts, one-way to six-way finger supports, L-type and vertical supports, neutral links on DMC pads, and two-, three- and four-pole power terminals. Procom DIN rail channels are zinc-plated steel to EN 60715.
We size busbar supports for the bar section, spacing and fault level of each panel, and use the same supports in the LT panels we build in Varanasi and Lucknow.
Key specifications
| Insulator material | Fibre-reinforced SMC (sheet moulding compound) and DMC (dough moulding compound) |
|---|---|
| Stand-off insulators | Conical and hexagonal, several heights, M5 to M12 threaded inserts |
| Finger supports | One-way to six-way, and flat-bar finger supports |
| Other supports | L-type, vertical support, neutral link with DMC pad |
| Power terminals | Double-pole 63/100/200 A; triple-pole 63/100 A; four-pole 63/100/200 A |
| Glow-wire test (manufacturer data) | 960 °C to IEC 60695-2-13 for SMC and DMC |
| Dielectric strength (manufacturer data) | 12 kV/mm (SMC), 10 kV/mm (DMC) per ASTM D149 |
| MCB / DIN rail channel | 35 × 7.5 mm, cold-rolled steel, zinc-plated with trivalent passivation, to EN 60715 |
Features & benefits
- Fibre-reinforced moulded insulators for mechanical strength under fault forces
- Non-hygroscopic material suited to humid and polluted sites
- Self-extinguishing compound for added fire safety
- Finger supports for multiple bars per phase
- Neutral links and power terminals for outgoing connections
- Corrosion-protected DIN rail channels, including cut edges
Where it’s used
- LT power and distribution panels
- MCC and PCC busbar chambers
- Distribution boards and feeder pillars
- Bus ducts and rising mains
- APFC and control panels
Standards & compliance
Busbar Support & MCB Channels — FAQs
How do I choose the right busbar support?
Match the support to the busbar width and thickness, the number of bars per phase and the phase spacing, then check its strength against the panel's short-circuit rating. Share the busbar size, current rating and fault level and we will select the supports and spacing.
What is the difference between SMC and DMC supports?
Both are fibre-reinforced moulding compounds. In Procom's published data, SMC has higher tensile and flexural strength and slightly higher dielectric strength than DMC, and both are rated 960 °C in the glow-wire test.
Are your MCB channels standard DIN rail?
Yes. Procom channels are 35 mm wide and 7.5 mm deep to EN 60715, so they accept standard MCBs, RCCBs, relays and terminal blocks.
