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The enclosures are free-standing, floor supported, with front and rear access. All doors are formed with a minimum of 12 gauge steel and have sufficient hinges to support the door and its components. Doors swing open more than 90 degrees for safety and ease of accessibility. Front doors are supplied with lockable handles. Rear removable panels are standard, rear doors can be added as an optional feature for additional cost. All door locks are keyed alike, with one key supplied for each lock. All rear panel covers are formed and secured with screws.
All steal parts are degreased and thoroughly cleaned through a three stage aqueous process. The finish is ANSI-61; light gray electrostatically charged polyester powder paint over a phosphate coating with a minimum of 2.0 mils in density. Finish is available for indoor or outdoor environments.
Typical enclosure dimensions are 96 inches in depth, 36 inches in width and 95 inches in height with a 4 inch wire-way for ease of section interconnection. Standard switchgear sections are shipped in pairs of two and can be lifted either with lifting eyes or with a forklift. Contact your local ASCO sales representative for custom sizing and lifting configurations.
The load bus, breakers and PT tiltouts are compartmentalized per ANSI standards to facilitate ease of operation, maintenance of the equipment and overall safety.
The Main bus is constructed of silver plated copper. Main bus can be rated from 1,200 to 3,000 amperes. The maximum temperature rise allowed on the main bus shall not exceed 65ºC over a 40ºC ambient. The bus shall be insulated to meet ANSI C37.20 BIL levels when applicable.
Control wiring is rated for 600 volts Current transformer circuit terminations are ring tongue type.
Control wires are permanently numbered every eight inches. Low level signal circuits are separated and provided with shielded wire to minimize electromagnetic interference. Shielded wire is grounded at one point.
Wiring connections between cubicles use labeled spline connection plugs. Low level signal wiring is hard wired. Wires are placed in wire ducts or harnessed to prevent sagging or breakage from weight and vibration. Inter-cubicle wiring harnesses are contained in overhead steel wire troughs.
All wiring to hinged doors runs through door terminal blocks or connection plugs. Terminal blocks are provided for all external connections and placed in an accessible area. Current transformer circuits are connected through shorting terminal blocks
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Florham Park, NJ 07932 |
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