Category Technical FAQs

Learn what DCR in wire (DC resistance) means, how it is calculated, and why it matters in electrical design. Discover factors affecting resistance, measurement methods, and applications in cables, transformers, and power systems.

Learn what open circuit potential (OCP) is and how it works in electrochemical and high-voltage systems. Discover OCP measurement methods, influencing factors, applications in battery testing, corrosion monitoring, and electrical equipment diagnostics.

Learn what electric power secondary equipment is and how it works in power systems. Discover the functions of relay protection, measuring instruments, DC power supply systems, control devices, and other secondary equipment used in substations and electrical networks.

Learn the working principle of an impulse current generator in simple English. Discover how capacitors generate high-energy impulse currents for testing transformers, cables, surge arresters, and high-voltage electrical equipment.

Learn the differences between flash point, ignition point, and spontaneous ignition point in simple English. Discover how these fire safety parameters affect flammable liquids, transformer oil testing, combustion risk, and industrial safety.

Learn how to perform UPS battery inspection and routine maintenance. Discover UPS battery testing methods, voltage checks, discharge testing, temperature requirements, and practical maintenance tips to improve UPS reliability and extend battery life.

Learn the working principle of an ammeter in simple English. Discover how AC and DC ammeters measure current, how magnetic force moves the pointer, the role of shunt resistors, and how ammeters are connected in electrical circuits.

Learn the causes, types, and hazards of partial discharge in high-voltage electrical equipment. Discover how air gaps, moisture, insulation defects, and corona discharge damage insulation systems and reduce equipment reliability.

Learn the recommended buried depth of a ground rod, grounding rod spacing requirements, and how grounding depth affects grounding resistance. Discover practical grounding installation tips, soil considerations, and grounding resistance testing methods for safe electrical systems.

Learn the difference between transformer capacity and transformer power, including kVA vs kW, transformer capacity calculation formulas, power factor, and transformer sizing methods. Discover how transformer ratings affect electrical system performance and safety.

Learn the calculation formula of transformer short-circuit impedance and impedance voltage in simple English. Discover how transformer impedance affects voltage drop, short-circuit current, voltage regulation, and power system protection.

Learn about common hydraulic oil testing items including viscosity, moisture, acid value, contamination level, flash point, foaming, wear analysis, and water separability. Understand the importance of hydraulic oil analysis for equipment reliability and preventive maintenance.