Installation and Connection

• Installation location
  • It should be installed in a dry, well ventilated place without strong vibration, avoiding installation in environments with high temperature, humidity, corrosive gases or susceptible to mechanical damage, so as not to affect the performance and service life of the transformer. For example, in industrial production workshops, it is necessary to stay away from high-temperature stoves, chemical storage areas, etc.
  • Try to be as close as possible to the measured current circuit to reduce lead length and minimize the impact of lead resistance and inductance on the measurement results. For example, in the switchgear of the power system, transformers should be installed near the switch contacts.
• wiring method
  • Strictly follow the wiring diagram of the transformer to ensure correct polarity of the primary and secondary sides. If the polarity is reversed, it may lead to increased measurement errors and even damage to the measuring equipment. For example, in a three-phase circuit, if the polarity of the transformer is reversed, it will cause errors in power measurement.
  • The wiring should be firm and reliable to avoid poor contact. Poor contact can generate additional resistance, causing the transformer to heat up, affecting measurement accuracy, and potentially leading to safety accidents. Suitable terminal blocks and screws can be used, and the fastening of the wiring should be checked regularly.

Electrical parameter matching

• Rated Current
  • The rated current of the primary side of the transformer should match the peak value of the measured current. If the measured current exceeds the rated current of the transformer, it may cause the transformer to saturate, resulting in distortion of the output signal and inaccurate measurement of the current value. For example, if the rated primary current of the transformer is 100A and the peak measured current reaches 200A, the transformer may enter saturation state.
  • At the same time, the secondary load current should not exceed the rated secondary current of the transformer to ensure its normal operation.
• frequency range
  • Ensure that the operating frequency range of the transformer covers the frequency of the measured pulse current. The frequency of high-frequency pulse current may be very high, and if the frequency response of the transformer is insufficient, it can lead to measurement errors. For example, the operating frequency range of some transformers is 10kHz-1MHz. If the measured pulse current frequency is 5MHz, the transformer cannot accurately measure it.
• insulation class
  • Select the appropriate insulation level transformer based on the voltage level of the usage environment. If the insulation level is insufficient, breakdown may occur, resulting in equipment damage and personnel injury. For example, in high-voltage power systems, transformers with insulation levels that meet the system voltage requirements should be selected.

Operation and Maintenance

• Operation Monitoring
  • During operation, the temperature of the transformer should be monitored regularly. If the temperature of the transformer is too high, it may be caused by overload, poor contact, or internal faults, and timely measures need to be taken. For example, an infrared thermometer can be used to regularly measure the surface temperature of the transformer.
  • Meanwhile, observe whether the output signal of the transformer is normal. If there are abnormal fluctuations, distortions, or no output in the output signal, the transformer and related circuits should be checked in a timely manner.
• maintenance
  • Regularly clean the transformer to remove surface dust and dirt, ensuring good heat dissipation and insulation performance. You can use a clean soft cloth to gently wipe the surface of the transformer.
  • Regularly check whether the wiring of the transformer is loose, whether the insulation is damaged, etc. If any problems are found, they should be dealt with in a timely manner. For example, conduct a comprehensive inspection and maintenance every six months or once a year.

Electromagnetic Compatibility

• Anti interference measures
  • High frequency pulse current can generate strong electromagnetic interference, which may affect the measurement accuracy and stability of transformers. Therefore, effective anti-interference measures should be taken, such as shielding, grounding, etc. For example, installing the transformer inside a metal shielding box and reliably grounding the shielding box.
  • Avoid placing transformers close to other sources of strong electromagnetic interference, such as high-power transformers, frequency converters, etc. If unavoidable, isolation measures should be added.
• Self interference
  • Transformers themselves may also generate electromagnetic interference, affecting surrounding electronic devices. When designing the system, the electromagnetic compatibility of the transformer should be considered, and corresponding measures should be taken to reduce its impact on other equipment. For example, arranging the positions of transformers and other equipment reasonably, adding filtering circuits, etc.