Different variants of feeder units are available for the infeed of BD2 rods, depending on the requirements:

• Start or end feeder unit
• Center feeder unit
• End feeder unit with switch disconnector
• Distribution board feeder unit
• Variants with cable entry from 1, 2 or 3 sides

Example: end feeder unit with connected cabling box

Features:

• Cables are introduced from the front face.
• Cable entry plate (aluminum) for single-core cable entry.
• Cable connection is via bolts. The bolts are included in scope of supply.
• The factory-fitted jumper between PE and N can be removed for connection of five-core cables.
• Feeder units are supplied without joint block.
• They are not directly mountable on junction units.

For double-ended infeed, an additional joint block is required.

BD2.-...-EE double-end feeder unit

To distribute large amounts of power with small busbar cross-sections, it is sensible to use a center feeder unit in some cases. It is mounted in the middle of a busbar line between two trunking units. The left run and the right run are supplied simultaneously with one supply cable. If using a 1000 A middle infeed, it is therefore possible to infeed 2000 A. In this case, special consideration must be given to the overload and short-circuit protection of the busbar system.

If the short-circuit protection is not assured by the upstream protective device and/or the overload is not due to the type and number of loads, additional protective measures are required.

Two options are possible:

• Use of a center feeder unit with one coupling unit on the right and left respectively next to the feeder unit. The coupling unit must be equipped with a protective device (fuse or circuit breaker) that ensures the short-circuit and overload function.
• Use of two end feeder units that are arranged centrally in the busbar line. The two supply cables are separately fused in the distribution system.

If using end feeder units in addition to a middle infeed, an additional terminal block is required for each end feeder unit.

Final infeed BD2.-...-EE and middle infeed BD2.-...-ME

End feeder units

The cable entry is made from the front; side cable entry is possible for the version with cable compartment BD2-...-EE-KR.

BD2.-...-EE and BD2.-...-KR end feeder units

The phase sequence can be changed on site by rotating the busbar pack.

Infeeds with switch disconnector

End feeder units with switch disconnector

Distribution board feeder units

BD2 connection to a distribution board.

BD2.-...-VE

Center feeder units

Cable entry is possible from 3 sides. The phase sequence can be changed on site by rotating the busbar pack.

BD2.-...-ME (PE left and PE right)

BD2.-...-ME (PE rear and PE front)