XT® 2007, Copyright 2007 Revised 08/2007 The Construction Sciences Research Foundation SPECTEXT® 2007, Copyright 2007

Revised 08/2007
The Construction Sciences Research Foundation
For use by licensed SPECTEXT® subscribers only.



Low-Voltage
Transformers


26 22 00 - 1
SECTION
26 22 00
{16461}

LOW-VOLTAGE TRANSFORMERS

{DRY TYPE TRANSFORMERS}


******************************************
This section includes enclosed dry type transformers for lighting and power loads, with primaries and
secondaries rated 600 volts and less. Dry type transformers rated for nonlinear loads are covered in
another Section.

Manufacturers listed in this section were identified as representative and not as an endorsement for
meeting this specification. For additional product information, visit 4Specs at
www.4specs.com
, ARCAT
at
www.arcat.com
, First Source at
www.reedfirstsource.com
, SpecSource at
www.specsource.com
, and
Sweets Network at
products.construction.com
.

This section includes performance, proprietary, and descriptive type specifications. Edit to avoid
conflicting requirements.

Contact the CSRF Support Center at
supportcenter@csrf.org
to submit comments or suggestions for
improvements to this specification. Visit the SPECTEXT web site at
www.spectext.com
for current
product announcements.
******************************************
PART 1

GENERAL
1.1

SUMMARY
A.

Section includes two-winding transformers; shielded transformers; autotransformers; and
buck-and-boost transformers.
B.

Related Sections:
1.

Section 26 05 33 - Raceway and Boxes for Electrical Systems.
2.

Section 26 22 03 - Low-Voltage Transformers For Nonlinear Loads.
3.

Section 26 22 06 - Low-Voltage Transformer Load Centers.
C.

Related Sections:
1.

Section 16128 - Raceway and Boxes for Electrical Systems.
2.

Section 16462 - Transformers for Nonlinear Loads.
3.

Section 16463 - Transformer Load Centers.
1.2

REFERENCES

******************************************
List reference standards included within text of this section. Edit the following for Project conditions.
******************************************
A.

National Electrical Manufacturers Association: SPECTEXT® 2007, Copyright 2007

Revised 08/2007
The Construction Sciences Research Foundation
For use by licensed SPECTEXT® subscribers only.



Low-Voltage
Transformers


26 22 00 - 2
1.

NEMA ST 1 - Specialty Transformers (Except General Purpose Type).
2.

NEMA ST 20 - Dry Type Transformers for General Applications.
B.

International Electrical Testing Association:
1.

NETA ATS - Acceptance Testing Specifications for Electrical Power
Distribution Equipment and Systems.
1.3

SUBMITTALS

******************************************
Only request submittals needed to verify compliance with Project requirements.
******************************************
A.

Section
01 33 00 - Submittal Procedures
{01330 - Submittal Procedures}
: Submittal
procedures.
B.

Product Data: Submit outline and support point dimensions of enclosures and accessories,
unit weight, voltage, kVA, and impedance ratings and characteristics, tap configurations,
insulation system type, and rated temperature rise.
C.

Test Reports: Indicate loss data, efficiency at 25, 50, 75 and 100 percent rated load, and
sound level.
1.4

CLOSEOUT SUBMITTALS
A.

Section
01 70 00 - Execution and Closeout Requirements
{01700 - Execution
Requirements}
: Closeout procedures.
B.

Project Record Documents: Record actual locations of transformers.
1.5

QUALIFICATIONS
A.

Manufacturer: Company specializing in manufacturing products specified in this section
with minimum three years [documented] experience.
1.6

DELIVERY, STORAGE, AND HANDLING
A.

Section
01 60 00 - Product Requirements
{01600 - Product Requirements}
: Product
storage and handling requirements.
B.

Store in clean, dry space. Maintain factory wrapping or provide additional canvas or
plastic cover to protect units from dirt, water, construction debris, and traffic.
C.

Handle in accordance with manufacturer's written instructions. Lift only with lugs
provided. Handle carefully to avoid damage to transformer internal components,
enclosure, and finish.