Electrical Diagrams Transformer Relay. Time coordination curves tcc and. Normally open normally closed thermal over load grd ch recp pl tr tr tr tr cr m con cr m.
Buchholz relay function is based on a very simple mechanical phenomenon. Icons that stand for the parts in the circuit as well. The following graph shows the characteristic for a general electric model 745 transformer protective relay providing differential current protection.
What are protective relays.
Variety of electrical transformer wiring diagram. Electrical wiring representations are composed of two points. In the relay circuit the electromagnetic coil is connected in series with the power source external contact relay contact. Working of electrical interlocking.