Electric Insulator Market Size, By Material (Ceramic/Porcelain, Glass, Composite), By Voltage (High, Medium, Low), By Application (Cables & Transmission Lines, Switchgears, Transformers, Busbars), By Product (Pin, Suspension, Shackle, Other Insulators), By End-Use (Residential, Commercial & Industrial, Utilities), By Rating (< 11 kV, 11 kV, 22 kV, 33 kV, 72.5 kV, 145 kV, 220 kV, 400 kV, 800 kV, 1,200 kV), By Installation (Distribution, Transmission, Substation, Railways), COVID-19 Impact Analysis, Regional Outlook, Application Potential, Competitive Market Share & Forecast, 2022 – 2028