Operator Safety — G&W Puffer Vacuum Interrupters are totally sealed, deadfront and insulated with nonflammable, nontoxic SF6 gas. Operators are spring assisted for positive quick-make, quick-break operation. A trip-free mechanism permits interruption independent of the operating handle if closing into a fault. Viewing windows permit visible indication of interrupter contact position. Enclosures provide tamper-resistant construction with penta-head bolts and padlock provisions.

Minimal Maintenance — No more routine inspections or dielectric testing as with oil gear. No more contact contamination, rodent problems or insulator maintenance as with air gear. A periodic check of the gas pressure gauge is all that is required.

Three Phase Tripping — No more single phasing problems. Simultaneous three phase tripping is available through the electronics and with three phase operating handles for manual operation and reset.

Protection Curve Compatibility — No need to recoordinate your distribution system. G&W solid state electronic controls permit extremely accurate, consistent protection curve characteristics compared to conventional fuses. The exclusive controls can emulate the most common time current curves (TCC) for power fuses, relays and fuse links (oil fuse cutouts). Optional electronic packages can provide ground trip, inrush restraint and adjustable time delay capability.

User Friendly Controls — Specific TCC characteristics are easily field selectable. Controls permit individual phase trip setting selection from twelve available levels.

Transformer and Motor Protection — The three phase trip feature and high continuous current capability make PVIs ideal for protecting three phase motors and transformers.

Loop and Tap Switching — Full 630A loop switching is accomplished using the latest puffer technology. Tap switching through 630A and 12 to 18kA symmetric fault protection is accomplished using resettable, electronically controlled vacuum interrupters. The vacuum interrupters can also function as load break switches.

Automatic Transfer — For critical load applications, PVIs can be supplied with an automatic transfer control package to provide automatic transfer from one feeder to another to minimize downtime.

Remote/SCADA Control — G&W PVIs can be supplied with motor actuators on both the line and load side providing remote control capability. Various control packages including portable DC controllers for onsite operation or complete SCADA /RTU systems are available.