Apparatus for transferring power to through an isolated, insulated connection. A power transfer assembly includes a portable cable assembly and a receiver. The portable cable assembly includes a power plug and a transmitter with a plug portion that mates with a receptacle on the receiver. A magnetic latch secures the plug portion in the ring receptacle. The transmitter includes a power supply, a power switch, a signal sensor, and a transmitting inductor. The receiver includes a receiving inductor, a signal coil, a magnet, a power converter, a temperature sensor, and an isolation switch. When the transmitter is coupled with the receiver, the power switch is operated by the magnet, the signal sensor is magnetically coupled to the signal coil, and the transmitting inductor is magnetically coupled to the receiving inductor. The normally open isolation switch is operated when the power converter is energized by the transmitter.