IEEE C57.123-2010 pdf free.IEEE Guide for Transformer Loss Measurement.
This guide provides background information and general recommendations of instrumentation, circuitry, calibration, and measurement techniques of no-load losses (excluding auxiliary losses), excitation current, and load losses of power and distribution transformers. The est codes, namely, IEEE Std C57.l2.9OTM, IEEE Std C57.l2.9l. and the test code section of IEEE Sid Q57•15TI, provide specifications and requirements for conducting these tests.’ This guide has been written to provide supplemental information for each test. More technical details of the measuring instruments and techniques presented in this guide can be found in the document develo by So IBl6j.2 This guide applies to liquid-immersed-power and distribution transformers, dry-type transformers, and step voltage regulators. Additionally, it applies to both single- and three-phase transformers.
Intinination on refcrenccs can bc tnd in Clausc 2.
Thc numbers in brackets co respond o those of the bibIio.raphy in Annex A.
1.2 Purpose
The purpose of the guide is
a) To describe the basis and methodology by which the accuracy requirements of (Clause 8 and Clause 9) of IEEE Std C57.l2.9O4 for liquid-immersed transformers and IEEE Std C57.12.91 2001 for dry-type transformers can be achieved.
b) To explain why the test code specifies certain procedures and limits.
c) To explain advantages and disadvantages of different test methods where alternative methods are available.
d) To explain practical limitations and valid means of overcoming them.
c) To give theoretical basis for interpolation/extrapolation of tested data and valid limits.
1) To explain test anomalies—how they result, what they mean, and how to handle them.
g) To give procedures for calibration, certification, and traceability of measurement processes to reference standards.
h) To discuss procedures for grounding, shielding, safety precautions, etc.
i) To provide schematics and examples to clarify concepts and demonstrate methodologies.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e.. they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references. only the edition cited applies. For undated references. the latest edition of the referenced document (including any amendments or corrigenda) applies.IEEE C57.123 pdf free download.