Power-Duct™ Non-Segregated Phase Bus Duct

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Overview

Siemens Power-Duct bus duct is a metal-enclosed, non-segregated phase bus designed specifically for 600 V, 5 kV or 15 kV applications customized to your project specifications.

Siemens offers both traditional bus duct and narrow chassis bus duct, that are capable of meeting most medium-voltage requirements with a small, lightweight design that lends itself to user-friendly installation.

Siemens Power-Duct non-segregated phase bus duct is intended for applications requiring greater dependability, such as connections among rotating equipment, transformers, switchgear and motor control centers.

Siemens manufactures the bus duct while building your other electrical equipment to help integration with said components while maintaining your project schedule.

With dimensional drawings, Siemens can deliver Power-Duct non-segregated phase bus duct in weeks rather than months.

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Description
The non-segregated phase bus duct is an assembly of bus conductors without inter-phase barriers. All of the associated connections, joints and insulating supports are contained within a metal enclosure.

Siemens Power-Duct non-segregated phase bus duct is designed for 600 V, 5 kV and 15 kV service in accordance with ANSI/IEEE C37.23. Continuous current ratings available include 1,200 A to 3,000 A for 5 kV through 15 kV and 1,200 A to 4,000 A for 600 V.

All conductors are separated and isolated from each other by insulating bus supports.

Every conductor for 2.4 kV and above is insulated with an epoxy coating to reduce corona and electrical tracking.

Multiple enclosure sizes are available to meet your specific requirements. Low-voltage application dimensions available:

• 14" (356 mm) x 21" (533 mm) (1,200 A-3,000 A)

• 16" (406 mm) x 31" (787 mm) (4,000 A).

Medium-voltage application dimensions available:

• 12" (305 mm) x 24" (610 mm)(1,200 A ND (narrow design)

• 16" (406 mm) x 33" (838 mm)(1,200 A-3,000 A).

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Features
Standard features include:

• 11-guage steel or 1/8" aluminum construction

• Removable covers

• Siemens engineered medium-voltage bus bar supports

• Polyester powder coat paint system

• 99 percent plus conductivity copper bars

• Built to ANSI standards

• UL Listed: 600 V up to 4,000 A and 5 kV up to 3,000 A.

Options available include:

• Aluminum or stainless steel housing

• Special paint colors available upon request.

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Benefits
Construction

The indoor metal enclosures are made from 11-gauge steel or aluminum. The outdoor metal enclosures are made from 11-gauge steel. Stainless steel housing is also available as an option. Enclosures are finished with a baked-on polyester powder coat paint that results in a uniform thickness and gloss, able to withstand harsh environments. The standard color is ANSI-61 gray. Special colors are available upon request.All enclosures have removable covers secured with bolts for easy access to the joints. Flexible joints are supplied in all straight bus runs at intervals of approximately 50’ (15.2 m) to allow for expansion when conductors are energized and carrying rated current.Bus runs can be terminated with flexible shunts, potheads, porcelain bushings or conductor stub ends for connection to riser bars in switchgear assemblies.

Easy Installation

The standard length of a bus section is 120" (3,048 mm) or less. Compact dimensions and lightweight construction make the installation user-friendly. Hanging rods can be spaced approximately every 4’ (1.2 m) for indoor bus runs. Supporting frames can be spaced every 8’ (2.4 m) for outdoor runs.

Conductors

All conductors are 99 percent plus conductivity copper bars. Silver-plated joint surfaces (tin-plated optional) ensure maximum conductivity while minimizing hot spots. Joints are made by bolting splice plates to either side of the bus bar. Each joint is covered by an easily removable insulating boot when conductors are insulated.

Seismic Ratings

Siemens Power-Duct non-segregated phase bus duct meets IBC seismic requirements and California Code Title 24. Complete guidelines for proper supports are provided on each seismic specified order.

Temperature

Siemens Power-Duct non-segregated phase bus duct can carry rated current continuously without exceeding a conductor temperature rise of 65 °C above an ambient temperature of 40 °C, as required by ANSI/IEEE C37.23.

Tests

Siemens designs of non-segregated phase bus duct have been tested to ANSI/IEEE C37.23 and witnessed by UL Laboratories, Inc. Certification of momentary current testing impulse testing and heat rise available upon request.