NEMA PREMIUM® EFFICIENCY TRANSFORMER PROGRAM GUIDELINES
PROGRAM DESCRIPTION AND SPECIFICATION DOCUMENT
Below is the program description and product specification for the NEMA Premium® Efficiency
Transformer program. A product must meet all of the identified criteria if it is to be qualified as a
NEMA Premium Compliant Transformer by its manufacturer.
1)
Qualifying Products: For the purposes of this Program, Qualifying Products are
transformers meeting the following criteria:
Dry-type distribution transformers: for single phase, between 15 kVA and 333 kVA;
for three-phase, between 15 kVA and 1000 kVA
2)
Premium Efficiency Specifications for Qualifying Products: Qualifying Products which
meet or exceed the nominal energy efficiency levels presented in Table 1 below.
Table 1: Low-Voltage Dry-Type Distribution Transformers
Single-phase
kVA
Efficiency (%)
Three-phase
kVA
Efficiency (%)
15
98.39%
15
97.90%
25
98.60%
30
98.25%
37.5
98.74%
45
98.39%
50
98.81%
75
98.60%
75
98.95%
112.5
98.74%
100
99.02%
150
98.81%
167
99.09%
225
98.95%
250
99.16%
300
99.02%
333
99.23%
500
99.09%
750
99.16%
1000
99.23%
3)
Test Procedure: The manufacturer shall determine the energy efficiency in accordance
with 10 C.F.R. Part 431 (“Test Procedures for Distribution Transformers).
4)
Buyer Information: NEMA recommends that the manufacturer place the NEMA Premium ®
Mark on all Qualifying Product models, which meet or exceed the Premium Efficiency
Specifications set forth in Tables 1 above, their packaging, and product-related materials such as
brochures, manuals, catalogs, advertisements, and Web sites. In addition, the manufacturer is
encouraged to disseminate educational materials to educate purchasers about energy efficiency
and its benefits. The manufacturer may determine the best manner to disseminate such
educational material so that it complements the manufacturer’s promotional and marketing
strategy.
5)
The NEMA Premium® Mark is the trademark of NEMA. As such, the name and NEMA
Premium Mark may only be used in accordance with the following guidelines and Memorandum of
Understanding and License signed by Partners and NEMA. NEMA oversees the proper use of the
NEMA Premium® Mark. This includes monitoring the use of the mark in the marketplace and
directly contacting those organizations that are using them improperly or without authorization.
Consequences to Partners of misusing the NEMA Premium® Mark may include termination of the
partner’s participation in the NEMA Premium program.
6)
Effective Date: The date that manufacturers may begin to qualify products as NEMA
Premium Compliant Transformers is defined as the effective date of the specifications. The
effective date is May 1, 2010.
7)
Specification Revisions: The NEMA Transformer Section reserves the right to change the
specifications should technological and/or market developments affect its usefulness to
purchasers, customers, industry or the environment. Revisions are to be arrived at through
industry discussions and consensus.