What is a medical IT system

Medical IT systems (commonly known as medical isolated power systems), also known as neutral ungrounded power distribution systems. In the IT system, the system neutral point is completely isolated from ground, and the enclosure in the system load is grounded by the ground protection wire. If there is a single-phase ground fault, the leakage current to ground can only pass through the system leakage capacitance of the system phase line constitutes a circuit, and the system leakage capacitance caused by the capacitance of the system is always far greater than the TN system grounding resistance, so the leakage current in the IT system is very small, the circuit breaker will not be caused by the existence of ground current overcurrent action to ensure that the system operates with faults.