April 13, 2015 © S&C Electric Company 2014-2015, all rights reserved Photo Sheet 695 -701

S&C Vista® SD Underground Distribution SwitchgearOutdoor Distribution (17.5 kV and 29 kV)

With Visi-Gap™ Load-Interrupter Switches and Visi-Gap™ Fault Interrupters — Pad-Mounted Installation Style

S&C Vista SD Underground Distribution Switchgear features load-interrupter switches for switching 600-ampere main feeders, and microprocessor-controlled fault interrupters for the switching and protection of 600-ampere main feeders and 200- or 600-ampere taps, laterals, and sub-loops. These elbow-connected components are encapsulated in an environmentally friendly solid-dielectric insulating material. Vista SD Switchgear is available in ratings through 29 kV and 16 kA symmetrical interrupting.

Vista SD Underground Distribution Switchgear can be furnished with an optionally available mild-steel or stainless-steel pad-mounted-style enclosure for above-grade installations. These enclosures meet the requirements of IEEE C57.12.28 and C57.12.29. All enclosures are protected from corrosion by S&C’s Ultradur™ Finishing System; the standard color is olive green, other colors are optionally available.

Vista SD switchgear can be furnished with an optionally available pad-mounted-style enclosure for above-grade installations.

S&C Visi-Gap load-interrupter switches utilize a vacuum interrupter in series with a manually operated two-position isolating disconnect, for three-pole live switching of 600-ampere three-phase circuits. Load-interrupter switches comply with IEEE Standard 1247 and IEC Standard 62271-103. They feature an easy-to-operate manual operating mechanism.

S&C Visi-Gap fault interrupters utilize a vacuum interrupter in series with manually operated two-position

isolating disconnect, for three-pole load switching of 200- or 600-ampere circuits and fault interrupting through 16 kA symmetrical at 17.5 kV and through 12.5 kA symmetrical at 29 kV. Fault interrupters comply with both IEEE Standard C37.60 and IEC Standard 62271-111.

One or more doors provide access to a common cable compartment; they and are secured by a padlockable top. To gain access to the operating compartment, first remove the padlock. Then rotate the pentahead bolt 360° counter-clockwise. Next, lift the counterweighted top until the latches engage. Removable panels separate the operating compartment from the cable termination compartment.

To gain access to operating compartment, first remove padlock. Then turn pentahead bolt 360° counterclockwise.

Lift counterweighted top to gain access to operating compartment. Removable panels separate the operating compartment from the cable termination compartment.

Introducing the industry’s f irst practical solid- dielectric switchgearwith a visible open gap and f ield- replaceable bushings

S&C Vista® SD Underground Distribution Switchgear

Load-interrupter switches and fault interrupters can be directly opened and closed using the manual T-handle furnished. Opening and closing speed is not dependent upon the speed with which handle is moved. Operating shafts are padlockable in either position.

Load-interrupter switches and fault interrupters can be directly operated using the manual handle.

Factory-installed and wired motor operators, to facilitate remote power operation of load-interrupter switches and fault interrupters, are optionally available. They can be decoupled from the operating mechanisms to permit testing without changing the positions of the switches or fault interrupters. The motor operators require a user-furnished 100-240 Vac 50/60-Hz control power source.

The motor operators are controlled by an accessory cable-connected (25- or 50-feet length) portable remote control pendant, featuring “Open/Reset” and “Close” push buttons, operator- and isolating-disconnect position-indicating lamps, and lamp test button. The portable remote control pendant is fully submersible.

Easy-to-follow mimic bus and indicators on the front of the switchgear convey the positions of the load-interrupter switches and fault interrupters (and their isolating disconnects), and if a fault interrupter has tripped on a fault. The default color scheme is green for “Open/Reset” and red for “Closed.” To reverse these colors (i.e., green for “Closed” and red for “Open/Reset”), specify Catalog Number Suffix “-J1.”

Mimic bus and indicators convey positions of load-interrupter switches and fault interrupters (and their isolating disconnects).

Large viewing windows provide a clear view of the isolating disconnects, allowing operating personnel to easily confirm the positions of load-interrupter switches and fault interrupters.

Open Closed

Visible open gap provided by isolating disconnect is easy to see through large viewing windows.

Terminals are equipped with field-replaceable 600-ampere-rated bushing adapters. Fault interrupters may be optionally equipped with 200-ampere bushing well adapters in lieu of 600-ampere bushing adapters. Bushing and bushing-well adapter interfaces conform to IEEE Standard 386, and accept all standard insulated connectors and inserts.

The self-powered overcurrent control can be programmed using a personal computer connected to the control through an adapter cable. The control features a variety of fuse and relay time-current characteristic (TCC) curves that comply with IEEE Standard C37.112.

2 S&C Photo Sheet 695-701

S&C Vista® SD Underground Distribution Switchgear

Vista SD Switchgear has the features and options needed to match user needs.

Ground bus(optional)

CT

Operating mechanism

Overcurrent control

Visible open gap (isolating disconnect) is easy to see through large viewing windows

Parking stands(optional)

Voltage indication feature (optional)

600-A bushing adaptersare field replaceable

Ratings: IEEE IEC

kV, System Class 15 27 12 24

kV, Maximum 17.5 29 12 24

kV, BIL 95 125 75 125Amperes, Continuous, Main Bus 600 600 630 630Load-Interrupter Switches

Amperes, Continuous 600 600 630 630Amperes, Load Splitting and Load Dropping❶ 600 600 630 630Amperes, RMS, Symmetrical Momentary and One-Second 16 000 16 000 16 000 16 000Amperes, RMS, Symmetrical Fault Closing, Three Time❷ 16 000 16 000 16 000 16 000

Fault InterruptersAmperes, Continuous❸ 600 600 630 630Amperes, Load Splitting and Load Dropping❶❸ 600 600 630 630

Amperes, RMS, Symmetrical, Interrupting 16 000■ 12 500 16 000■ 12 500

Short-Circuit Rating

Amperes, RMS, Symmetrical 16 000■ 12 500 16 000■ 12 500

❶ Parallel or loop switching.❷ Applicable to fault closing into closed position.

❸ 200 amperes if fault interrupters are furnished with optional 200-ampere bushing wells.

■ 12 500 amperes if fault interrupters are furnished with optional 200-ampere bushing wells.

S&C Photo Sheet 695-701 3