Specification Number: 26 24 13.82
Product Name: IPC2 Stacked Transformer Assembly
SECTION 26 24 13.82
IPC2 Stacked Transformer Assembly
PART 1 GENERAL
1.01
SECTION INCLUDES
A. Stacked Transformer Assembly – Furnish and install an integrated solution as specified herein and
where shown on the associated [schedules] [drawings].
1. Each section shall include:
a. One or two dry type lighting transformers
1.02
REFERENCES
A. The equipment referenced herein are designed and manufactured according to the latest revision of
the following standards, code or specification:
1. UL 891 – Standards for switchboards
2. NEMA PB 2 – Standards for switchboards
3. NFPA 70 - National Electrical Code (NEC)
4. IBC – International Building Code – Seismic compliance requirements
5. NFPA 5000 – NFPA Building Code – Seismic compliance requirements
6. ASCE 7 – American Society of Civil Engineers, Minimum Design Loads for Buildings and
Other Structures – Seismic compliance requirements
7. ICC ES AC156 – International Code Council Evaluation Services Acceptance Criteria for
Seismic Qualification by Shake-Table Testing of Nonstructural Components and Systems –
seismic testing protocol
8. IBC – International Building Code – Seismic compliance requirements
9. NFPA 5000 – NFPA Building Code – Seismic compliance requirements
10. ASCE 7 – American Society of Civil Engineers, Minimum Design Loads for Buildings and
Other Structures – Seismic compliance requirements
11. ICC ES AC156 – International Code Council Evaluation Services Acceptance Criteria for
Seismic Qualification by Shake-Table Testing of Nonstructural Components and Systems –
seismic testing protocol
1.03
SUBMITTAL AND RECORD DOCUMENTATION
A. Approval documents shall include drawings of overall switchboard enclosure dimensions.
B. Drawing shall include the voltage, degree C temperature rise and kVA rating of each transformer.
C. Record drawings shall be made available to the customer on CD. The customer may request any
of the following formats: DXF, DWG or PDF.
1.04
QUALIFICATIONS
A. Company specializing in assembly of switchboard products with a minimum of twenty-five (25)
years documented experience.
B. Panelboards shall be manufactured in accordance with standards listed in “References”.
C. The equipment shall be suitable for and certified to meet applicable seismic requirements of the
International Building Code (IBC), 2003 ICC Edition and ASCE 7-02, or later, for the site-specific
location. Guidelines for the installation shall be provided by the equipment manufacture and
based on testing of representative equipment. Equipment capacity shall be determined from triaxial seismic shake table test results as defined in ICC ES AC156.
1.05
DELIVERY, STORAGE, AND HANDLING
A. Inspect and report concealed damage to carrier within their required time period.
B. Handle carefully to avoid damage to panelboard internal components, enclosure, and finish.
C. Store in a clean, dry environment. Maintain factory packaging and, if required, provide an
additional heavy canvas or heavy plastic cover to protect enclosure(s) from dirt, water,
construction debris, and traffic.
1.06
OPERATIONS AND MAINTENANCE MATERIALS
A. Manufacturer shall provide installation instructions and NEMA Standards Publication PB 1.1 –
“Instructions for Safe Installation, Operation and Maintenance of Panelboards Rated 600 Volts or
Less”.
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1.07
WARRANTY
A. Manufacturer shall warrant specified equipment free from defects in materials and workmanship
for eighteen (18) months from the date of invoice.
PART 2 PRODUCTS
2.01
2.02
2.03
2.04
2.05
2.06
MANUFACTURES
A. Shall be Square D
B. __________
C. ______________
D. Substitutions must be submitted in writing three (3) weeks prior to original bid date with
supporting documentation demonstrating that the alternate manufacturer meets all aspects of
the specification herein.
RATINGS
A. Equipment shall be heat rise and short circuit tested as dictated within the UL 891 standard.
B. UL listed series ratings shall be made available upon request.
ENCLOSURES
A. Each lineup shall consist of the required number of vertical sections bolted together to form a
rigid assembly.
B. All sections in the lineup shall be rear aligned and shall be front-accessible.
C. Section(s) shall allow for side cable entry and exit.
D. Enclosures shall be constructed in accordance with UL 891 requirements.
E. Enclosures shall have ANSI 49 gray enamel electrodeposited paint finish.
C. Enclosures shall be NEMA Type 1.
D. Single section shipping splits shall not exceed 36 in. wide maximum.
FRONTS
A. All front side and read covers shall meet strength and rigidity requirements of applicable UL
standards.
B. The manufacture shall provide removable front covers to service the transformer(s).
WIRING/TERMINATION
A. The manufacture shall supply factory installed type THHN copper power cables to connect
the transformer(s) to equipment located in adjacent sections in the lineup.
B. When shipping splits are required, power cables shall be cut to length, stripped, labeled and
rolled back in one of the adjacent enclosures.
[INTEGRATED TRANFORMERS]
A. Shall be Square D [General Purpose] [Energy Efficient TP-1] [Non-Linear] dry type lighting
transformers.
B. Transformer primary and secondary windings shall be [Three Phase 480 volt primary –
208Y/120 volt secondary], [Single Phase 480 volt primary -120/240 volt secondary ]
C. Transformer kVA rating shall be as specified on the drawings.
D. Transformer insulation system shall be rated at 220 degree C and designed for full load
operation at a maximum of [150], [115], [80] degree C temperature rise.
E. Transformer coils shall be [aluminum] [copper] wound construction and shall be impregnated
with nonhygroscopic thermosetting varnish.
F. Transformers shall have [no shield] [electrostatic shield]
G. [One], [Two stacked] transformer(s) shall be factory installed in a freestanding enclosure as
shown on the associated drawings.
H. Due to weight constraints, a transformer greater than 225kVA shall be floor mounted in a
standard transformer enclosure.
I. Refer to product specification 16460-1 to obtain general lighting and distribution transformer
specifications.
J. Fan cooled transformers will not be allowed.
PART 3 EXECUTION
3.01
INSTALLATION
A. Install the Stacked Transformer Assembly section in accordance with manufacturer's written
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instructions, NEMA PB 2.1 “Proper Handling, Installation, Operation and Maintenance of
Deadfront Switchboards Rated 600 volts or Less” and NEC standards.
3.02
FIELD QUALITY CONTROL
A. Inspect complete installation for physical damage, proper alignment, anchorage, and grounding.
B. Check tightness of bolted connections and circuit breaker connections using calibrated torque
wrench or torque screwdriver per manufacturer's written specifications.
END OF SECTION
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