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a) The most common method of classifying the solid insulating materials is based upon their chemical compositions, distinguished mainly between inorganic, organic and the composites of the two materials. With aid of diagram, classify the properties and differences of PVC and porcelain materials in insulation systems.

a) The most common method of classifying the solid insulating materials is based upon their chemical compositions, distinguished mainly between inorganic, organic and the composites of the two materials. With aid of diagram, classify the properties and differences of PVC and porcelain materials in insulation systems.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Question 2 a) The most common method of classifying the solid insulating materials is based upon their chemical compositions, distinguished mainly between inorganic, organic and the composites of the two materials. With aid of diagram, classify the properties and differences of PVC and porcelain materials in insulation systems. b) An oil-immersed 11kV/3.3kV distribution transfomer is experincing some abnormalities based on oil analy sis report at steel factory. Based on the maintenance personnel, the affected transformer always operates at higher loading during peak production period and tripping of unit will take place frequently due to operational issues. Besides that, oil/winding temperature of the unit increased by 30% from the intial reading of 70 degC during overloading period. Based on the Table 2 (b) below, briefly intepret the: i. Causes and affects on the transformer's operating condition ii remedial action plans on this transformer to prevent solid or liquid dielectric breakdown or failures. Test values Parameters Dielectric Strength (KV) Acidity (mgKOH/gm) Color Liquid Power Factor Water Content (ppm) Hydrogen (H2) (ppm) Oxygen (02) (ppm) Nitrogen (N2) (ppm) Methane (CH4) (ppm) Carbon Monoxide ( CO) (ppm) Carbon Dioxide (CO2) (ppm) Ethane (C2H6) (ppm) Ethylene (C2H4) (ppm) Acetylene (C2H2) (ppm) 30 0.002 1.5 0.08 20 400 10,200 102,424 90 1707 12756 2 2 Table 2 b
Transcribed Image Text:Question 2 a) The most common method of classifying the solid insulating materials is based upon their chemical compositions, distinguished mainly between inorganic, organic and the composites of the two materials. With aid of diagram, classify the properties and differences of PVC and porcelain materials in insulation systems. b) An oil-immersed 11kV/3.3kV distribution transfomer is experincing some abnormalities based on oil analy sis report at steel factory. Based on the maintenance personnel, the affected transformer always operates at higher loading during peak production period and tripping of unit will take place frequently due to operational issues. Besides that, oil/winding temperature of the unit increased by 30% from the intial reading of 70 degC during overloading period. Based on the Table 2 (b) below, briefly intepret the: i. Causes and affects on the transformer's operating condition ii remedial action plans on this transformer to prevent solid or liquid dielectric breakdown or failures. Test values Parameters Dielectric Strength (KV) Acidity (mgKOH/gm) Color Liquid Power Factor Water Content (ppm) Hydrogen (H2) (ppm) Oxygen (02) (ppm) Nitrogen (N2) (ppm) Methane (CH4) (ppm) Carbon Monoxide ( CO) (ppm) Carbon Dioxide (CO2) (ppm) Ethane (C2H6) (ppm) Ethylene (C2H4) (ppm) Acetylene (C2H2) (ppm) 30 0.002 1.5 0.08 20 400 10,200 102,424 90 1707 12756 2 2 Table 2 b
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