Some advantages of indoor current transformers

       The secondary side of a current transformer must never be open-circuited during operation. When the secondary side of a current transformer is open-circuited, the entire primary current is used for magnetization. The secondary winding induces a dangerously high voltage, which can reach several kilovolts or even higher, seriously threatening personnel and equipment. Therefore, the secondary circuit of the current transformer must not be open-circuited during operation, and the wiring must be secure and no fuses should be installed.

       Reference Answer: Transformers are important devices used for measurement and protection in electromechanical systems. They are divided into two main categories: voltage transformers and current transformers; the former can transform the high voltage of the system into a standard low voltage (100V or 100/3V); the latter can transform the current in a high-voltage system or the large current in a low-voltage system into a low-voltage standard small current (5A or 1A), used to supply power to measuring instruments and relays.

     Current and voltage measuring equipment: Used to measure current and voltage values during the testing process, usually including current transformers, voltage transformers, ammeters, and voltmeters.

     ●Flexible configuration, traditional current transformer calibration/traditional voltage transformer calibration/electronic current transformer calibration/electronic voltage transformer calibration can be configured according to different needs;

     Improve current level: Transformers can improve the current level to meet the load requirements. For example, in some applications, a higher starting current may be required to start equipment such as motors or fluorescent lamps. In this case, a transformer can be used to increase the current level to meet the system's needs.

    Reference Answer: Current transformers and voltage transformers are based on the principle of electromagnetic induction, and their structure is similar to that of ordinary transformers. A current transformer consists of a closed core and windings. Its primary winding has very few turns and is connected in series with the circuit whose current needs to be measured, so it often carries the entire current of the line. The secondary winding has more turns and is connected in series with the measuring instrument and protection circuit. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the measuring instrument and protection circuit series coil is very small, and the state of the current transformer is close to a short circuit. The current transformer converts the large current on the primary side into a small current on the secondary side for measurement, and the secondary side cannot be open-circuited.

     Reference Answer: Only voltage transformers are available in single-phase and three-phase types. Current transformers are classified according to their installation location: indoor type (below 35KV) and outdoor type (). According to the installation method: through-wall type, support type and embedded type. According to the insulation method: dry type, cast type, oil-immersed type, porcelain insulation, gas insulation and capacitive type. According to the number of turns of the primary winding: single-turn type and multi-turn type. Single-turn type is divided into: through type and busbar type. According to Applications: measurement and protection.

     Reference Answer: Only voltage transformers are available in single-phase and three-phase types. Current transformers are classified according to their installation location: indoor type (below 35KV) and outdoor type (). According to the installation method: through-wall type, support type and embedded type. According to the insulation method: dry type, cast type, oil-immersed type, porcelain insulation, gas insulation and capacitive type. According to the number of turns of the primary winding: single-turn type and multi-turn type. Single-turn type is divided into: through type and busbar type. According to Applications: measurement and protection.