420kN DC suspension porcelain insulator XZSP1-420 (U420B)

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

Dimensions:

Norminal Diameter (D): 400mm

Unit Spacing (H): 205mm

Norminal Creepage Distance (L): 650mm

Coupling Size: 28R

Mechanical Values:

Rated M&E Failing Load: 420kN

Routine Tension Load: 210kN

Impact Load:

Electrical Values:

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

SF6 P