PVB-S outdoor vacuum circuit breaker (hereinafter referred to PVB-S) is pole mounted switch equipment of vacuum circuit breaker series,rated voltage is 12 kV, applied to the overhead lines. is PVB-S is one of the most flexible devices for smart grid application, and also provides maximum functionality and mounting flexibility suitable for a variety of applications.This is especially true of our feeder automation product, where years of knowledge and modular manufacturing technique allow PVB-S outdoor
circuit breaker to meet any need and schedule. PVB-S outdoor vacuum circuit breakers can meet various protections requirements under the situation with power electricity, including making and breaking short-circuit current. PVB-S has a very good performance on frequent operation occasions, and PVB-S can fully meet the requirements of automatic re-closing with high reliability and electrical service lifetime
PVB-S is perfect synthesis of affirmed technology in designing and constructing vacuum interrupter and manufacturing technology, and also is combination of advanced EL operatingmechanism.
1 Vacuum interrupter
PVB-S is a circuit breaker that can be installed under a harsh environment with vacuum interruption and SF6 gas insulation.It has a very strong fault breaking and closing capacity.In any case, on separation of the contacts, anelectric arc is generated made up exclusively of molten and vaporized contact material. The electricarc supported by the external energy only remains until the current is cancelled by passing through natural zero. At that instant, the rapid reduction in the load density carried and the fast condensation of the metallic vapour lead to extremely rapid recovery of the dielectric properties. The vacuum interrupter therefore recovers the insulating capacity which withstand the transient recovery voltage, definitively the arc is extinguished. Since high dielectric strength can be reached in vacuum, even with minimum distances,
interruption of the circuit is also guaranteed when separation of the contacts takes place a few milliseconds before passage of the current through natural zero.
2 Product feature
• Suitable for DA application
• Contacts in vacuum environment to avoid oxidation and contamination
• High quality, 3 mm stainless steel tank designed for maximum robustness and minimum welding line to minimize corrosion
• Advanced laser cutting, CNC bending and robot welding to ensure high reliability on sealing
• globally recognized vacuum interrupter
• Modularized and reliable spring mechanism minimizes operating energy and ensures longer mechanical life
• Status indicators visible from distance
• Offers reliable maintenance free operation even in the most demanding climatic conditions including salt laden atmospheres, corrosive industrial pollution, snow and ice
• The motor drive device can easily be retrofitted on site to manually operated units
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