Take you to understand the various wiring methods of current transformer
Release time:
2022-01-10
As an important product in the field of power transmission and measurement, the normal operation of the current transformer is very important, and the correct connection is directly related to whether it can be used normally. Therefore, it is necessary to choose the appropriate wiring method according to the actual needs and wiring requirements.
The current transformer is used in many circuits. Because of its wide range of uses, and in different fields of use, its wiring requirements are different, so users need to master its various wiring methods, so that when in actual use, Can accurately determine which wiring method is more appropriate.
1. Single-phase wiring
Single-phase wiring is one of the more basic wiring methods, which is used to measure the current in a single-phase circuit. In single-phase wiring, the secondary output of the transformer is directly connected to the input of the instrument.
2. Three-phase wiring
Three-phase wiring is used to measure the current in a three-phase circuit. In a three-phase connection, three current transformers are usually used, each transformer being connected to one phase of a three-phase circuit. By connecting between the secondary terminals of the three transformers, the current of each phase can be calculated.
3. Double winding wiring
In a two-winding connection, the secondary winding of the transformer is connected to two different devices. The first device is connected to the primary coil of the transformer, and the second device is directly connected to the secondary coil of the transformer. This wiring method is usually used to measure the current and voltage of a load.
4. Variable ratio wiring
In the variable ratio wiring, the primary coil of the current transformer is connected to the power supply circuit, and the secondary coil is connected to the instrument. By selecting the appropriate secondary coil to match the voltage ratio between the power supply and the instrument, this wiring method can be used to adjust the sensitivity of the transformer.
5. Series and parallel wiring
Series and parallel wiring is often used to change the accuracy of current transformers. Series wiring is usually used to improve the measurement ability of DC current, while parallel wiring is used to improve the measurement ability of AC current.
In the series connection, the primary coil of the transformer is connected in the middle of the circuit, so that all currents in the circuit are measured. In parallel wiring, several transformers are connected together in parallel to improve their measurement capability.
As an important product in the field of power transmission and measurement, the normal operation of the current transformer is very important, and the correct connection is directly related to whether it can be used normally. Therefore, it is necessary to choose the appropriate wiring method according to the actual needs and wiring requirements.
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