Type QM outgoing with a breaking capacity 400A of this type has the simplest protection by melting a safety protection (fuse) sold were able to secure the transformer to the limit of 2500 Kva. cubicle type QM has suntrip connected with DGH in the transformer, this connection gives a message when the transformer temperature increased or increase load limited by fuse as safety Melting then suntrip work automatically for me off the transformer, so this type is used for transformer efesiensinya can reach 60-80% of users and the need for electrical power.