Reclosers-Three-Phase Vacuum Electronically Controlled Type VSA

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The VSA group electronically controlled, three-phase, automatic circuit reclosers with vacuum interrupters, provide reliable and economic overcurrent protection to meet a variety of line and substation applications for 15 kV systems (up to 1200 A continuous/ 20,000 A interrupting current). Recloser operations are programmed on the electronic control panel with accurate, preset tripping characteristics and reclosing times, enabling close coordination with other protective devices on the system. When system requirements change, program settings are easily altered with no sacrifice of accuracy or consistency. Recloser and control accessories enable further tailoring of the protective program to achieve maximum system operating flexibility.

Ratings Can be applied on distributions systems ranging from 2.4 through 14.4 kV.
Ratings Available with ratings up to 1200 amps continuous.
Ratings Available with ratings up to 20,000 amps interrupting current.

Features

Recloser operations are programmed on the electronic control panel with accurate, preset tripping characteristics and reclosing times, enabling close coordination with other protective devices on the system. When system requirements change, program settings are easily altered with no sacrifice of accuracy or consistency. Recloser and control accessories enable further tailoring of the protective program to achieve maximum system operating flexibility.

Fault-sensing information for VSA-group reclosers is supplied to the electronic control by bushing-type current transformers mounted in the recloser. Tripping and closing signals from the control energize operating circuits in the recloser.

Minimum-trip values of the control are independent of the continuous current and interrupting ratings of the recloser. Flexibility in coordination with other protective devices is provided by dual time-current characteristics available from a broad choice of time-current curves, a wide range of minimum-trip values, and a variety of programmable reclosing times.

Energy to operate the vacuum interrupters is provided by a motor-driven operator supplied from a 240 Vac source. The motor operator closes the recloser by charging the closing springs, which in turn provides the force to close the vacuum interrupters and charge the opening springs.

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