Non-contact current transformers are more prone to loss of power as well as installation and safety issues

Because no contact shunt current transformer ratio is more prone to loss of power as well as installation and safety issues, so power measurement systems generally use non-contact current transformer. The traditional solid-core current transformer transformer on the principle that the primary and secondary windings connected to the core via a. Measuring current induced magnetic field within the core, resulting in a current generated in the secondary winding, the current and the primary  electric transformer  the number of turns of the secondary winding is proportional to the quotient. The common current transformer designed to measure the typical range of sinusoidal 50/60Hz AC current. As a result of common materials and processes, the well-known technique is very popular.
Solid core  circuit breakers  is designed specifically for new equipment and building power meter provides economic  Air circuit breaker  solution. But for existing machines and facilities involved in power monitoring numerous applications, these transformers is not appropriate, which may be used in all places before updating solid core transformers, we must cut off the power and disconnect the wires. Installed power metering system power if required, even if only for a while (eg interrupt production lines, telecommunications or data center power, some nuclear power plants, etc.), in general, is not possible, the reason is the cost too high or abnormally dangerous .