News

Wrindu welcomed an Indian customer delegation for a technical visit and live transformer oil BDV test demonstration. The visit included discussions on cable fault testing systems, transformer oil chromatography (DGA), and tan delta test equipment, showcasing Wrindu's advanced power testing solutions.

Wrindu announces its Dragon Boat Festival holiday schedule for 2026. Our office will be closed from June 19th to June 21st, and normal operations will resume on June 22nd. During the holiday, response times may be delayed. Please contact us in advance for urgent inquiries. Thank you for your support and happy Dragon Boat Festival!

Discover how Wrindu demonstrated series resonance testing, transformer DC resistance testing, tan delta testing, SF6 analysis, circuit breaker testing, and oil dielectric strength testing during a live factory visit with overseas customers.

Wrindu supplies high-voltage testing equipment for Uganda 132kV substations, supporting UETCL with reliable transformer, relay, SF6, VLF, and cable testing solutions.

Wrindu announces the 2026 Labor Day holiday schedule from May 1 to May 5. Orders will be accepted normally, while shipments and services resume on May 6.

Wrindu announces 2026 Chinese New Year holiday: Feb 12-Feb23, resume Feb24. Orders accepted during holiday, shipments/queries processed from Feb24. Wishing you a prosperous Year of the Horse!

Wrindu signs a new contract with ETHIOPIAN ELECTRIC POWER to supply transformer, switchgear, and CT/PT testing equipment, which supports Ethiopia's grid upgrade and GERD maintenance.

Ruidu Company's bid submitted in response to the Procurement of Design, Manufacture, Test, and Supply of Substation Testing Equipment for Lot_2 has been evaluated.

Rui Du Mechanical and electrical (Shanghai) Co., Ltd. is honored to have won the bid for the POWERCHINA Hydropower Bureau International Company Ethiopia DDAHD Electrical Instrument Procurement Project!

Learn the differences between the Megger, Tan Delta, and Hi-Pot tests. Understand their purpose, voltage levels, and applications for assessing insulation quality.

Learn about partial discharge (PD) types and their impact on electrical systems. Early PD detection is key to preventing insulation failure and improving equipment reliability.

Learn about oil purifiers and their types, including vacuum, centrifugal, and de-coloring oil filter machines. Discover how they remove impurities, water, and gases from various oils like turbine, lubricating, and refrigeration oils.

RDDY-3000 is a portable high-power outdoor power supply with a large lithium battery. It offers reliable 220V AC output, ideal for on-site testing and emergency backup.

Discover the RDHL-200A Ground Loop Resistance Tester with high precision, four-wire measurement, and advanced safety features. Ideal for testing switches, cables, and high-voltage systems.

Learn how the Primary Current Injector tests relays, transformers, breakers, cables, and equipment with precise current injections for performance and safety verification.

Learn the essential safety principles of IEC 61010, including electric shock protection, mechanical robustness, fire containment, and hazard prevention.

Saudi Arabia's Vision 2030 focuses on transforming its energy sector through renewable projects. Explore key partnerships, including Chinese investments in wind and solar, and the nation's shift toward a sustainable, diversified economy.

2023.10.30— The power industry is undergoing a revolutionary transformation to meet the growing demand for electricity while focusing on reducing its environmental impact. Innovative initiatives worldwide are driving the power sector towards a greener and more digital future.

Learn what creeping leakage current means in high-voltage insulation testing. Understand causes like moisture, thermal runaway, and partial discharge, how to read I-V curves, and how to troubleshoot unstable leakage current for accurate diagnostics and safer electrical equipment testing.

Learn how the RDXZ-270kVA/270kV AC Series Resonance Variable Frequency Withstand Voltage Test Device uses series resonance to provide safe, energy-efficient, and precise high-voltage testing for cables, transformers, and GIS systems.

Discover the key differences between AC cable and MC cable for industrial electrical systems. Learn how grounding methods, EMI shielding, moisture resistance, and durability impact performance in factories, substations, renewable energy projects, and automation systems.

Discover the Wrindu RDB-II Transformer Turns Ratio Tester designed for fast, accurate, and reliable transformer ratio testing. Features include three-phase testing, automatic tap changer detection, multiple protection functions, touch-screen operation, and support for various transformer types.

Learn how a protection relay tester works, its applications in substations and power systems, and the advantages of the Wrindu RDJB-1600M Microcomputer Relay Protection Tester. Compare popular relay tester models, testing functions, and key features for accurate relay protection analysis.

Learn the difference between impedance and resistance in electrical circuits. Understand how impedance works in AC systems, how resistance behaves in materials, and their roles in real applications like audio and power systems.

Visit Wrindu at ETE Vietnam 2026 in Ho Chi Minh City. Discover advanced electrical testing equipment, transformer testing instruments, cable testing solutions, and high-voltage testing systems at Booth 171, Hall A1.

Wrindu successfully showcased advanced testing instruments at the 2025 Middle East Power & Electrical Equipment Expo in Riyadh. All products sold out, highlighting global trust in Wrindu's quality and innovation.

Join Wrindu at the 2025 Middle East Power and Electrical Equipment Expo in Riyadh. Explore innovative products like the RDHG-E Tester, Transformer Tan Delta Tester, and more.

Join Wrindu at the 2025 Middle East Power Expo in Riyadh! Visit Booth A197 to explore our innovative electrical solutions. Don't miss out on this industry event!

Dubai Middle East Energy 2023