① The primary rated voltage of current transformer is consistent with the rated voltage of the system.
② The primary rated current of current transformer shall be 20% ~ 120% of its normal load current.
③ The secondary load of current transformer, such as the power (VA) or impedance consumed by instrument and relay cable, shall not exceed the rated capacity corresponding to the selected accuracy level, otherwise the accuracy level will be reduced.
④ According to the requirements of measurement and protection, select the appropriate accuracy level of current transformer.
⑤ The number of current transformers can be determined by power supply mode and wiring mode.
⑥ Verify the dynamic and thermal stability of current transformer according to the short circuit capacity of the system at the installation site.https://www.ctsensorducer.com/