News

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!

Vietnamese clients visit Wrindu to explore transformer testing solutions, including series resonance devices, oil chromatography, Tan Delta testers and son on.

Wrindu will be closed from January 1-3, 2026, for the New Year holiday. Orders will be accepted, but shipments will resume on January 4. Wishing you a prosperous New Year!

Wrindu Company recently welcomed Indian customers to our factory. We showcased our high-voltage power testing equipment and strengthened our partnership with international clients.

Mr. Qin, CEO of Ruidu Mechanical and electrical (Shanghai) Co., Ltd, visits Vietnam to deepen customer relationships and collect valuable feedback.

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 the boiling point of oil and freezing point of oil for different types. Discover how automatic pour point testers improve accuracy in oil testing for industrial and power applications.

Learn what BDV (Breakdown Voltage) means, why it matters in transformer oil testing, and how to measure it accurately. Explore BDV test procedures, acceptable values, and the Wrindu RDJJD-100kV oil dielectric strength tester for precise and reliable insulation diagnostics.

Explore the complete guide to On-Load Tap Changer (OLTC) working principles, types, design, maintenance & diagnostics. Learn how Wrindu OLTC testers ensure transformer reliability & grid stability.

Learn overcurrent causes, impacts & prevention. Wrindu testing equipment features built-in overcurrent protection for safe, reliable industrial electrical testing.

Oil filled cables are reliable for high-voltage underground and submarine transmission. This article will help you learn its types, working principle, advantages, standards, testing and maintenance.

Ensure CT performance with Wrindu’s CT magnetization curve testers. Accurate knee-point measurement, automated testing, and OEM customization for utilities & factories.

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