Functional units Choice Double Busbar System GM6 The GM6 range is composed of 8 functional units. The chart below may be used to link up needs and functional units, and it gives information on the general composition of each unit. How to select: if the user wishes to supply power to a transformer, the solution is a Transformer Feeder. The matching functional unit is therefore a TF, comprising an AD1 cubicle equipped with a disconnector switch, circuit breaker and a type T Sepam. incomer line busbar disconnector feeder transformer busbar disconnector line busbar disconnector circuit breaker circuit breaker circuit breaker earthing switch earthing switch earthing switch LI TI LF AD1 - AD2 AD1 - AD2 AD1 - AD2 Sepam S Sepam T Sepam S synoptic synoptic synoptic current transformer / voltage transformer transformer busbar disconnector capacitor busbar disconnector circuit breaker earthing switch TF AD1 - AD2 Sepam T synoptic circuit breaker earthing switch CF AD1 - AD2 Sepam C synoptic bus section switchboard busbar disconnector bus coupler switchboard busbar disconnector circuit breaker circuit breaker B-S CL1 - CL2(1) Sepam B synoptic current transformer (only CL2) B-C CT1-CT2 Sepam B synoptic current transformer (only CT2) busbar metering meter / earth busbar disconnector earthing switch BB-S TT1(1) Sepam B synoptic voltage transformer lightning arresters key locks (1) key locks use one unit for each busbar Incomer LI, TI with AD1/AD2 Busbar coupler B-C with CT1/CT2 Schneider Electric Feeder LF, TF, CF with AD1/AD2 Switchboard bus section BS with CL1/CL2 Busbar metering BB-S with TT1 9