Voltage and current transformers difference

The main difference is in normal operation is very different working conditions, as follows:
1) can short-circuit current transformer secondary, but not open; voltage transformer secondary can open, but not short-circuit;
2) relative to the secondary side of the load, the voltage transformer as well as a smaller internal resistance air circuit breaker, can be considered voltage transformer is a voltage source; while the current transformer primary has great resistance, and even can be considered is a current source of infinite resistance.
3) when the Electric energy meter voltage transformer close to saturation flux density, magnetic flux density decreased failure; electric meter flux density is low during normal operation, and the short side due to a short-circuit current becomes large, the magnetic flux density increased significantly, sometimes even far beyond saturation.