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A current transformer is an electrical device used to measure alternating current in power systems. It is widely applied in power distribution networks, industrial equipment, monitoring systems, and protection circuits. The main function of a current transformer is to convert a large current flowing in a conductor into a smaller and standardized current that can be safely measured by instruments such as ammeters, power meters, relays, or monitoring devices. By reducing the current to a manageable level, the transformer allows measurement equipment to operate safely without being exposed to high electrical loads.
Many people use the terms multimeter and voltmeter interchangeably, but they are not the same. A voltmeter is a single‑purpose tool, while a multimeter is a comprehensive device that includes a voltmeter as one of its functions. Understanding their differences helps users choose the right tool for electrical work.
A current transducer is an essential electrical device that converts an alternating or direct current into a standardized output signal, such as 4–20 mA, 0–5 V, or 0–10 V. Its main purpose is to isolate, measure, monitor, and protect electrical systems by providing safe, accurate, and reliable current information for control and automation. Without current transducers, modern power systems, industrial equipment, and electronic devices would lack real-time feedback and effective protection.
A digital panel meter (DPM) is an electronic instrument that displays electrical values such as voltage, current, resistance, or temperature as clear numerical readings, unlike the pointer movement of analog meters. It is widely used in control panels, power supplies, and industrial equipment for its high accuracy, readability, and stability. This explanation focuses on digital voltage meters, while also covering digital current meters.
On September 17, 2025, Tianrui Group’s Nanjing Branch welcomed distinguished guests from Italy. The clients made a special trip to Nanjing with the aim of gaining a comprehensive understanding of Tianrui Group’s technological capabilities, product portfolio, and manufacturing strength
Nanjing, April 29, 2025 - To deepen team collaboration awareness, facilitate cross-departmental communication, relieve work pressure, stimulate team vitality, and enhance mutual understanding, Hubei Tianrui Electronics Co., Ltd.'s Nanjing Branch organized an outdoor team-building event for all emplo
The residual current transformer developed by our company was commissioned by the National Fire Electronic Product Quality Supervision and Inspection Center for third-party inspection in May 2017
On September 3-6, 2024, Tianrui Electronics Co., Ltd. participated in 2024 ELECTRIC & POWER in Ho Chi Minh City, Vietnam, which was attended by more than 200 enterprises from all over the world.
From May 14 to 16, 2024, Tianrui Electronics participated in 2024CWIEME "German Coil, insulation material, motor and transformer Manufacturing Exhibition" held in Berlin International Convention and Exhibition Center, there are totally over 600 enterprises from Germany, UK, India and other co
On June 12, 2023, Tianrui Electronics participated in the CIRED2023 International Power Supply Conference and Exhibition and Power Grid Innovation and Sustainable Development Summit Forum in Rome, Italy. This conference will promote the high-quality development of future power distribution technolog
