Porosity testing machine QHPT-35

for high-voltage insulators

Porosity Testing Machine of Porcelain Insulator Brief Introduction: This equipment is applied to test porosity property of HV porcelain insulator under constant high pressure environment. Standard applied: - IEC 60383-1 / GB/T 775.1-2006 Insulators for overhead lines with nominal voltage above 1000 V; part 1: ceramic or glass insulator units for A.C. systems; definitions, test methods and acceptance criteria Type of test: - Sample test of porcelain insulator Specimen available: - All Porcelain insulator Including ceramic disc insulator, pin type insulator, post type insulator and etc Test Method: 1.Preparation of specimen: Get ceramic piece from thickest part of porcelain insulator by breaking Preparation of testing reagent (liquid): reagent with ratio of 1g of fuchsin (dye) in 100g industrial ethanol/Water. 2.Testing procedure: Put ceramic specimen (piece) into porosity testing machine which contains the testing reagent, pressure is performed with no less than 20 x 106 Pa, for 72 hours. 3.Testing result judgment: Take out specimen, wash them clean and well dried. Break the piece and observe if there is penetration in new section. Dye penetration of slight crack caused in step 1 shall not be considered as failure. Main Technical Specifications Name:Porosity testing machine Model.:QHPT-35 Testing pressure:0-35Mpa Controlling accuracy:+2% of Max pressure , -1% of Min Pressure Pressure Control Mode:Manual control Operating Mode:Manual control Time of pressure holding:At any length Testing Medium:Water