G&W Electric model PNI padmount switches include load break and fault interrupting capability. The fault interrupters provide electronically controlled, resettable over current protection in a totally sealed, dead front device. The switches are designed for use on 3-phase systems with voltages up to 38kV, 900A load break, and continuous current, with 12.5kA – 25kA symmetrical fault interrupting ratings. The PNI is one of G&W Electric’s most versatile switch style because it can be ordered with front accessible switch operators and bushings (front access) as well as front accessible switch operators with rear entry bushings (front/ rear access).
The switches are designed to IEEE C37.72, C37.74, and C37.60 for load break and fault interrupting capability. Padmount enclosures are designed and tested to IEEE C57.12.28 and C57.12.29.