Copper busbars and phase distribution busbars are used for safe and simple cross-connection of miniature circuit breakers, residual current devices and other installation devices in sub-distribution boards and small distribution switchgear. Insulated copper busbars are tested according to the VDE and DIN EN 61439-1 as well as DIN EN 61439-6 and offer finger-safe power supply and distribution of the potential. Additional wiring and cables can be saved thanks to the busbar system. Shortening busbars or cutting / sawing a busbar is generally permitted, as long as a few work steps are observed.
The busbar product portfolio includes fork busbar and pin busbar versions with one to four poles. The cross-section and current of the electrical busbars are 10 mm² with 63 A or 16 mm² with 80 A.
Busbar variants with skipping poles are available depending on the installation devices chosen (LS, FI, FI/LS circuit breaker, RCD, RCCB, RCBO) with and without auxiliary contacts. The electrical busbars and busbar system can be shortened or sawed to the required length.
Accessories for the insulated busbars include feeder modules, end caps and covers. The end caps ensure the required creepage distances in the system even after the busbars have been shortened or cut off and guarantee finger safety in accordance with DIN EN 50274. Various feeder terminals simplify wiring of the cables within the substation.
| Standards and regulations | DIN EN 61439-1/ DIN EN 61439-6 |
| Material busbar | E-Cu-ETP |
| Material insulation / end caps | PC+ABS |
| Dimensional stability temperature | 125°C |
| Flammability rating | V2 |
| CTI | 600 V |
| Short-circuit resistance Icc | 25 kA /100 A gl |
| Dielectric strength | 36 kV/mm |
| Rated voltage | 400 VAC |
| Rated impulse withstand voltage | 4 kV |
| Overvoltage category | III |
| Degree of pollution | 2 |
The insulation and the copper should preferably be sawed separately. Make sure that a sharp iron saw is always used.
Separate the copper busbars from the insulation and saw each to the desired length. Make sure that the plastic at the ends protrudes past the busbars so that the end caps can still be fitted at the end and finger safety can be ensured.
Deburr the edges with a file. Make sure that only the cutting edge is filed, not the contacts. Then, using a hard brush or compressed air, remove the copper or plastic particles.
When all copper or plastic shavings have been removed, the end caps can be installed on the ends of the busbar and the shortened busbar is ready for use.
When constructing a switchgear according to DIN 18015, there is a specification of six current circuits per 3-pole RCD. The specifications of DIN VDE 0701-0702 are described somewhat differently. To prevent undesired switch-off, the operating leakage currents must not exceed 0.3 times the rated residual current of the residual current device.
With a 30 mA version, this would be a maximum of 9 mA. A maximum of six circuits should be provided for a 3-phase RCD (two circuits per phase conductor, each 2×3.5 mA = 7 mA, so that 9 mA is not exceeded).
The copper busbars are designed precisely for this application example. The phases of the residual current device are bridged to the other devices via the neutral conductor connection (N conductor). A rack unit (RU) within the phase distribution bar is skipped to ensure potential sequence.
Standard-compliant distribution of the phases (3P+N) to 6 automatic circuit breakers with skipping neutral line on the residual current circuit breaker (10 RU).
Distribution of the phases (3P+N) to 8 automatic circuit breakers with skipping neutral line at the residual current circuit breaker (12 RU).
In our online catalog, you'll find even more busbar product variants.
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