DC disc suspension porcelain insulators are used on HVDC transmission lines to support and insulate conductors. The insulators can be used in heavy polluted area with reasonable shed profile design, the porcelain material has superior characteristics to resist DC ageing, and pins with zinc sleeve can prevent DC electrolytic corrosion. The main E&M performance has reached international advanced level.
The following suspension insulator comply with the IEC standard. The glaze color of the insulator are brown or light gray.
Item No.: XZSP1-420
Class IEC: U420B
Fig No.: 3
Norminal Diameter (D): 400mm
Unit Spacing (H): 205mm
Norminal Creepage Distance (L): 650mm
Coupling Size: 28R
Rated M&E Failing Load: 420kN
Routine Tension Load: 210kN
D.C. Withstand Voltage Wet: 55kV
D.C. Withstand Voltage Dry: 140kV
Dry Lightning Impulse Withstand Voltage, Positive: 140kV
Dry Lightning Impulse Withstand Voltage, Negative: 150kV