Accessories
4.3 Connection system
3VA molded case circuit breakers with UL and IEC certification
170
Manual, 01/2019, L1V30435333-01
Solid and stranded sector-shaped conductors are also used.
Compression lugs
For stable and reliable connecting of cables to molded case circuit breakers, compression
lugs are also used. These elements help to make solid connections at the breaker.
Insulation is first stripped from the end of the cable (by amount of length L) before the
compression lug is attached to the cable.
The cable must be stripped carefully to ensure that the correct amount of insulating material
is removed. In this way, a reliable connection of the cable to the compression lug is ensured.
A total of 1 mm more insulation can be stripped than is specified by length L.
Compression lugs compliant with DIN 46235 have ideal heat transfer characteristics for
connecting busbar connectors. By contrast, "Tubular compression lugs with narrow palm for
switching devices" (designation "SG" for example) must be used to make direct cable
connections in the termination area of the molded case circuit breaker. These compression
lugs vary in design depending on make. All compression lugs of this kind with the
dimensions stipulated in standard IEC 609437-1, Annex P are basically suitable.
