Continuous current: 1250–3150+ A bus and feeder options. Standards: IEC 62271-200; internal arc testing per IEC/TR 61641 if specified. Air insulation with generous creepage/clearance sized for pollution degree and altitude. 5 kV the rated current will be 75/sqrt (3)/34. If the single core cables of 35 kV rated shield will be grounded on one end only then, according to. Functional Specification for 15 kV, 25 kV, or 35 kV Underground Distribution Switchgear Functional Specification for 15 kV, 25 kV, or 35 kV Underground Distribution Switchgear Scope This specification applies to three-phase, [select #] - way [select # -source, select # -tap], 50-60 Hz, fully dead. The 35 kV distribution system is entirely cable-based. Based on the 35 kV cable types and lengths in the substation, the system capacitive current is calculated as follows: According to substation engineers, the capacitive currents for buses I, II, and III are each Ic = 50 A. Powell's Cable Bus has been. hgear, Vacuum Fault Interrupter, 3-Ph, 3-Wire, 2 In/1 Out (1 VFI), 35kV, 600A, Pad-Mounted, Surge Arres it are a general representation of form factor for the product line and may not accurately represent this exact configuration in every detail due to custom builds and changes betw en similar.