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.
Compare self-excited and separately excited generators in terms of advantages, limitations, cost, and performance. Learn which generator type offers better voltage regulation, stability, and efficiency for your application.
1504-2026
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.
0204-2026
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.
3103-2026
