... . The SVC of MCR type adopted iron core reactor, while TCR-typed SVC adopted air-core reactor, if the loss of MCR-typed ... TCR is as below: First, TCR with air-core adopted aluminum lines, MCR with iron core adopted copper lines, the resistance of aluminum ... magnetic permeability of iron core is 2000~8000times of air magnetic permeability, so the aluminum line of air-core reactor will be many times ...