IEEE 2747-2020 pdf free

IEEE 2747-2020 pdf free.IEEE Guide for Energy Efficiency Technology Evaluation of Electric Power Fittings.
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. IEC 61284, Overhead lines- Requirements and tests for ftings.s
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.”
branch connector: Device for connecting a branch conductor to a main conductor.
current-carrying electric ftting: The ftting that is designed for carrying electrie current; mainly includes parallel groove clamp, insulation piercing connector, compression-type tension clamps, compression-type splicing sleeves, etc.
energy loss of ftting: The loss of ectric energy caused by a fting or its assembly with conductors when current passes through.
in-line connector: Device for connecting two conductors to extend the length.non-current-carrying electric ftting: The ftting that is not designed for carrying electric current; mainly includes suspension clamps, bolt-type tension clamps, wedge-type tension clamps, vibration dampers, spacers, etc.
reference conductor: The conductor with a certain length in the test circuit, which is used as a reference for measuring the energy loss of fttings in order to measure the temperature and energy loss and select the current value for the test.steady state: The state of which the temperature variation of a reference conductor does not exceed 2C within 15 min, when the test loop passes through a certain constant current at required test conditions.
4. General requirements
The ftting sample for testing should comply with the requirements in accordance with IEC 61284.”
A ftting under test may be complete with all components. Test equipment should be calibrated or verified as qualified in the validity period.
5. Test equipment
Test equipment should include a current generator, horizontal tensile tester, and measuring devices of temperature, humidity, current, voltage, and power (or power factor).
The current generator and measuring devices of temperature, humidity, current, voltage, and power (power factor) can be integrated or separated.
The accuracy level of the tension measurement of horizontal tensile tester should be no lower than class 1.0.
The temperature measure meter should employ thermal resistance or other suitable sensor, with a maximum permissible error not exceeding 0.5 °C.
Humidity should be measured by the use of moisture sensitive resistance, moisture sensitive capacitor, or other suitable sensors whose maximum permissible error does not exceed :5% relative humidity (RH).
AC can be measured by the current transformer and ammeter with an accuracy level no lower than class 0.5.
Voltage can be measured by voltmeters with an accuracy level no lower than class 0.5.
Power factor can be measured by the power factor meter with an accuracy level no lower than class 0.5.
Power can be measured by the power meter with an accuracy level no lower than class 1.0. IEEE 2747 pdf download.