I. Voltage Transformer (VT)Voltage Transformer (Potential Transformer, abbreviated as PT; Voltage Transformer, abbreviated as VT) is an electrical device used to transform voltage levels in power circuits.1. Operating PrincipleThe voltage transformer operates on the principle of electromagnetic induction and has a structure similar to that of a conventional transformer, consisting primarily of a primary winding, a secondary winding, and a core. The primary winding is connected in parallel to the

Low-voltage power distribution lines are widely used across various industries, and the distribution environments are complex and diverse. These lines are accessed not only by professionals but also frequently by non-specialists, significantly increasing the risk of faults. Improper design or installation can easily lead to electric shock (particularly indirect contact), damage to wiring, or even electrical fires.The grounding system is a critical component of low-voltage distribution networks&m

Comprehensive maintenance is crucial for ensuring the safe and stable operation of high-voltage power distribution systems. Key maintenance requirements include: First, utilizing operational maintenance to achieve SCADA system data monitoring and acquisition, ensuring that system operating parameters meet established constraints under normal conditions. Second, implementing maintenance to carry out Demand Side Management (DSM) and Load Management (LM), optimizing the load curve to prevent overlo

Fault PhenomenonA power distribution system fault occurred in a customer's server room, resulting in damage to some IT equipment and instruments. Upon receiving the feedback, our company's engineers immediately rushed to the site to inspect the power distribution system and analyze the cause of the fault.Fault InspectionThe server room uses a three-phase five-wire power supply system. Two three-phase input, three-phase output UPS units (without output isolation transformers) are operating in par

In the daily operations of an enterprise, the stable operation of electrical equipment is crucial. As a key step in changing the operational state of electrical equipment, the accuracy and standardization of switchgear operations directly impact equipment safety, production continuity, and personnel safety. Therefore, it is essential to enhance the level of switchgear operations and ensure that the operational procedures are standardized and precise.I. Definition and Importance of Switchgear Ope

Thunderstorm DayHazard PointsLightning rod drop and back - strike injuring peopleArrester explosion injuring peopleOutdoor terminal box and gas relay getting rainwaterControl MeasuresWear qualified insulating boots and stay at least 5m away from the lightning rod.Wear safety helmets properly and do not approach arresters to check action values.Keep terminal boxes and mechanism box doors tightly closed, and ensure the gas - proof rain shields are in good condition.Prohibit holding umbrellas when

Purpose of Measuring Insulation ResistanceThe primary reason for performing insulation testing on electrical equipment is to ensure public and personal safety. By conducting insulation tests between disconnected current-carrying conductors, grounding conductors, and conductors intended for grounding, the possibility of fires caused by short circuits can be eliminated.Why Perform Insulation Testing?Safety The most important reason for performing insulation testing is to ensure public and personal

I. Establishing an Inspection SystemElectrical equipment safety and stable operation are critical under summer high-temperature conditions. To ensure the reliability and safety of electrical systems, enterprises and institutions must establish and improve a regular inspection system for electrical equipment. This system should clearly stipulate:Daily Patrols: Key facilities such as high-voltage distribution equipment, transformers, and low-voltage distribution equipment must be comprehensively i

From Coils to Current: The Evolution of Transformer EngineeringIn the realm of electrical engineering, few inventions have had as profound an impact as the transformer. It stands as a silent yet indispensable force, enabling the efficient transmission and distribution of electrical power. Delving into the intricate world of transformer engineering, we embark on a journey from the early days of coiled wonders to the current state of advanced technology, witnessing the evolution that has shaped ou

What is a Relay?A relay is an electrical switch that uses electromagnetic force to control the opening and closing of one or more electrical circuits. It typically consists of core components such as an electromagnet, contacts, and springs. When the coil of the electromagnet is energized, it generates a magnetic field that attracts or releases an armature, thereby driving the contacts to actuate and achieve circuit connection or disconnection.Classification of RelaysRelays are primarily divided