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        1. NEMA
        2. Transformers Toolkit
        3. Customer Education
        • Codes and Standards
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        Customer Education

        NEMA transformer manufacturers developed these guides as a resource for potential customers to use in drafting comprehensive purchasing specifications.  Lack of information and/or clarity are a primary cause in bidding delays and even time to delivery.  While it is possible that certain rare applications for transformers require parameters beyond what is recommended in these guides, the information here will be comprehensive and useful in the majority of cases when followed.

        • pdf8TP PS 1: Purchasing Specifications Guide, Liquid-Immersed Low-Voltage Transformers (≤ 1.2kV)
        • pdf8TP PS 2: Purchasing Specifications Guide, Liquid-Immersed Medium-Voltage Transformers (2.4kV–35kV)
        • pdf8TP PS 3: Purchasing Specifications Guide, Liquid-Immersed Large Power Transformers (≥ 25kV)
        • pdf8TP PS4-2021: Purchasing Specifications Guide, Dry Type Transformers Low-Voltage (≤1.2kV)
        • pdf8TP PS5-2021: Purchasing Specifications Guide, Dry-Type Transformers Medium-Voltage (2.4kV–35kV)

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