Secondary grounding specifications for voltage transformers and current transformers   Voltage transformers and current transformers, as key components in power systems, undertake important tasks of measurement, protection and monitoring. These two types of transformers each play an indispensable role in the power system, and together provide strong guarantees for the stable operation of the power […]

Inspection of factory current transformers and resolution of abnormalities   Current transformers need to be inspected regularly when in use so that faults can be discovered and handled in a timely manner. Generally, the fault of the transformer is diagnosed through some abnormal phenomena, such as overheating of the equipment, smoke inside the equipment, odor […]

Analysis of operating characteristics of current transformer     Characteristic analysis and solution of current transformer secondary open circuit, and specific conditions for current transformer operation.   In electrician manuals and various textbooks, the conclusion on the open-circuit operation of the secondary side of a current transformer is: “The open-circuit secondary side of a current […]

Problems related to magnetic saturation of electromagnetic current transformer   The Hall current sensor is based on the magnetic balance Hall principle. According to the Hall effect principle, a current Ic is passed through the control current end of the Hall element, and a magnetic field with a magnetic field strength of B is applied […]

Application of open-type current transformer in low voltage power distribution system      At present, most low-voltage current transformers in the market are mainly used in the construction of new projects. Due to the rapid development of the economy, enterprises are gradually becoming more aware of energy conservation and emission reduction. The electrical characteristics of […]

Application of electronic current transformer in digital substation     Digital substation is composed of intelligent primary equipment (electronic transformer, intelligent switch, etc.) and network The secondary equipment is constructed in layers (process layer, bay layer, station control layer) based on the IEC61850 communication specification, which enables modern substations to share information and interoperate between […]

If the current transformer measurement is abnormal, try this practical diagnostic method Introduction In order to make full use of the alarm information in the operation of power system components, this paper makes full use of conditional probability tools, taking parallel high-voltage reactors as an example, to establish the correlation between electrical analog measurement results […]

Design and application of metering low voltage current transformer Overview Metering type low voltage current transformer is a current transformer that provides current to electric energy meters and other similar electrical appliances. It is widely used in the measurement of current in low voltage distribution systems. The main accuracy levels (given for current transformers) are: […]

Common fault analysis and maintenance methods of current transformer As an important device in the system, current plays a role in measurement and protection. Once a fault occurs, it is very easy for the power system to fail to operate normally and the power supply function to lose its function. If these faults cannot be […]

Research on high-precision micro-flux current transformer   Abstract: The development of high-precision micro current transformers is a common topic of concern in the current power instrumentation industry. This project uses the micro-flux principle, passive error compensation method, and double-core double-winding structure to manufacture high-precision micro current transformers; using micro-flux within the allowable error range is […]

Research on the impact of electric vehicle charging on residential area distribution network With the continuous development and progress of electric vehicle related technologies, electric vehicles will surely achieve large-scale development  . However, a large number of electric vehicle charging will have an impact on distribution network equipment, thereby affecting the safety and economic operation […]

Research on Fault Current Controller of DC Microgrid With the increasing consumption of fossil energy and increasingly severe environmental problems, methods to adjust the energy structure through the development and utilization of renewable energy sources such as wind power and photovoltaics are being studied and applied by more and more scientific research institutions and groups. […]