Vista Underground Distribution Switchgear

Product catalog summary

Overview: The S&C Vista® Underground Distribution Switchgear is designed for outdoor distribution systems ranging from 15.5 kV to 38 kV. It addresses common issues in underground distribution, such as labor-intensive operations and aesthetic concerns, by offering manual, remote supervisory, and source-transfer models.

Key Features:

Available in manual, remote supervisory, and source-transfer models.
Includes load-interrupter switches and resettable vacuum fault interrupters or arc spinners.
Enclosed in a submersible, SF6-insulated, welded steel tank with large viewing windows.
Configurable with up to six 'ways'.

Installation Options:

Low-profile pad-mounted style to reduce real estate requirements.
UnderCover style for areas with stringent space or aesthetic requirements.
Available for floor-mounted, wall-mounted, and man-hole style installations.

Operation and Safety:

Designed for quick, easy, and safe operation by a single person.
Certified arc-resistant per IEC 298 Appendix AA.
Features a simple operation procedure with visible confirmation of switch positions.

Overcurrent Control:

Microprocessor-based overcurrent control with programmable TCC curves.
Event recorder for tracking operations of fault interrupters.

Remote Supervisory Features:

Automated switching and fault protection with retrofittable automation features.
Supports integration with various RTUs and communication devices.
Allows remote operation and monitoring, including advanced applications like sensitive earth-ground fault detection.

Source-Transfer Control:

Provides automatic primary-selective service for critical load circuits.
Includes Micro-AT® Source-Transfer Control for minimizing interruptions.
Advanced microprocessor for control operations with programmable settings.

Technical Specifications: The document provides details on voltage unbalance detection, overcurrent-lockout features, and standard ratings for three-phase systems.

Voltage Unbalance Detection: Monitors voltage unbalance and initiates automatic transfer to an alternative power source if a preset level is exceeded.

Overcurrent-Lockout Feature: Prevents automatic transfer operations that could close a source load-interrupter switch into a fault, indicated by an LED. Test keys simulate overcurrent conditions.

Standard Three-Phase Ratings: Includes ratings according to IEC and ANSI standards:

Amperes, RMS: 200 or 630 amperes.
Frequency: 50 or 60 Hertz.
Fault Interrupter and Load-Interrupter Switch Ratings: Continuous, load dropping, and load splitting capabilities with detailed fault-closing and fault-interrupting ratings.
Additional Ratings: Options for 900 and 1200 amperes with specific duty-cycle ratings.

Key Specifications: Fault interrupters and load-interrupter switches are rated for 600 amperes continuous operation, with limitations based on bushing types. Magnetizing current switching capabilities and unloaded cable switching ratings are detailed.

Additional Information: References applicable standards (IEC 265-1, ANSI C37.71, C37.72, C37.73) and provides contact information for further inquiries.

Vista Underground Distribution Switchgear

Vista Underground Distribution Switchgear

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