Rui Du Mechanical and electrical (Shanghai) Co., Ltd. is a professional manufacturer and system solution provider for the global supply of power testing equipment. Rui Du Mechanical and electrical (Shanghai) Co., Ltd. was established in 2014, which focuses on the independent design, development and production of high-voltage power test equipment. The products cover substation transformer, high voltage switch, mutual inductor, lightning arrester, storage battery, cable fault, relay protection, insulation withstand voltage, insulation grounding and oiling equipment, SF6 equipment testing, power generator testing, water cooling equipment testing, instrumentation, spare parts, power quality management. All products of the company have passed international IS09001 quality certification, IEC certification and CE certification.
Learn acceptable earth resistance values for grounding systems. Understand 5 ohm and 1 ohm standards, test methods, soil impact, and safety compliance.
2502-2026Wrindu 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!
1102-2026Use Wrindu loop resistance tester to keep reliable electrical system performance. Learn the process, benefits, and how Wrindu's precision testers help prevent downtime and system failure.
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