A protection relay for protecting an electric system, includes means a manner of a time multiplier value, a manner of calculating, with the received time multiplier value, and an inverse definite time dependency having an exponentiation function. When the first port group is set to standby and a fault notification frame is not received via a bridge port, the port control unit controls the plurality of first ports constituting the first port group to a second state. This can allow the bound off part of the knitted fabric to have an excellent stretchability. The device is able to treat chronic dissections and reduce false lumen backflow, which remains otherwise an unresolved issue in the endovascular treatment of false lumen aneurysms. The PC board is held into the expansion station by a feature on the PC board that interferes with the inside of the wire-way of the expansion station sub-base.