Comb Busbar Single Pole | 1 meter Pin Type
Comb Busbar Single Pole | 1 meter Pin Type
Blog Article
Comb Busbar (Single Pole, 1 Meter, Pin Type) – Technical Overview
A single-pole comb busbar (pin type, 1-meter length) is a conductive rail used in electrical distribution panels (DBs), switchgear, and busbar trunking systems to distribute power efficiently. The "comb" design allows for easy tap-off connections, while pin-type terminals ensure secure mounting.
Key Features & Specifications
✅ Material:
Electrolytic Copper (99.9%) – High conductivity, low resistance.
Tin-Plated or Silver-Plated – Prevents oxidation, improves longevity.
✅ Current Rating: 100A to 400A+ (depends on cross-section).
✅ Voltage Rating: Up to 1000V AC/DC (typical for LV applications).
✅ Pin-Type Terminals:
M8/M10 threaded pins for secure bolted connections.
Compatible with MCBs, RCCBs, isolators, and contactors.
✅ Standards Compliance:
IEC 61439-1/2 (switchgear assemblies).
UL 467 (grounding/bonding).
✅ Insulation Options:
Bare busbar (for enclosed DBs).
Heat-shrink sleeving (extra insulation).
Typical Applications
Distribution Boards (DBs) – Power distribution to multiple breakers.
Motor Control Centers (MCCs) – Feeder connections.
Solar Combiner Boxes – PV string connections.
Industrial Panels – Modular power distribution.
Sizing Guide (Current vs. Cross-Section)
| Current Rating | Busbar Width × Thickness (mm) | Typical Use Case |
|---|---|---|
| 100A | 20 × 5mm | Residential DBs |
| 250A | 30 × 6mm | Commercial panels |
| 400A | 50 × 10mm | Industrial MCCs |
(Derating may apply in high-temperature environments.)
Installation Guide
Mounting:
Secure to DIN rail or panel base using insulated supports.
Maintain minimum 10mm clearance between phases (if multi-pole).
Connections:
Torque M8 pins to 12–15 Nm, M10 to 20–25 Nm (prevents loosening).
Use copper lugs/crimps for cable terminations.
Safety Checks:
Verify no sharp edges (prevents short circuits).
Apply anti-oxidation paste (if unplated).
Comparison: Solid vs. Comb Busbar
| Feature | Comb Busbar | Solid Busbar |
|---|---|---|
| Flexibility | Easy tap-off for multiple breakers | Fixed connections only |
| Space Efficiency | Compact, organized layout | Requires more spacing |
| Cost | Slightly higher | Cheaper (no comb design) |
Popular Brands
Legrand (Compact NSX busbars)
Schneider Electric (Acti9, Isobar ranges)
ABB (Form 2B, Tmax busbars)
Eaton (Memshield 3 busbars)
Price Estimate
1-meter single-pole (100A): 15–15–30 (bare copper).
Plated/insulated versions: 25–25–60.
(Prices vary by brand, plating, and current rating.)
Where to Buy
Electrical wholesalers (Rexel, CEF).
Online: Amazon, eBay, Alibaba (for bulk orders).https://store.unigulfsupply.com/product/comb-busbar-single-pole-1-meter-pin-type/