TP1000 Sections 1 - 6 by PKGLpkTb

VIEWS: 8 PAGES: 6

									                                           Standard Specification Form
                                           Electrical Acceptance Tests

1. GENERAL SCOPE

   1. It is the purpose of these specifications to assure that all tested electrical equipment, both contractor- and
       owner-supplied, is operational and within industry and manufacturer's tolerances and is installed in
       accordance with design specifications.
   2. The tests and inspections shall determine suitability for energization.
   3. An itemized description of equipment to be inspected and tested follows: (insert list for each specific job
       here.)

2. APPLICABLE REFERENCES

   1. All inspections and field tests shall be in accordance with the latest edition of the following codes, standards,
       and specifications except as provided otherwise herein.

       1.   American National Standards Institute - ANSI

       2.   American Society for Testing and Materials - ASTM

       3.   Institute of Electrical and Electronic Engineers - IEEE

            ANSI/IEEE C2-1993, National Electrical Safety Code

            ANSI/IEEE C37, Guides and Standards for Circuit Breakers, Switchgear, Relays, Substations, and
            Fuses.

            ANSI/IEEE C57, Distribution, Power, and Regulating Transformers.

            ANSI/IEEE C62, Surge Protection.

            ANSI/IEEE Std. 48-1990. IEEE Standard Test Procedures and Requirements for High-Voltage AC
            Cable Terminations.

            ANSI/IEEE Std. 81-1991. IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth
            Surface Potentials of a Ground System.

            ANSI/IEEE Std. 141-1993. IEEE Recommended Practice for Electrical Power Distribution for Industrial
            Plants (IEEE Red Book.).

            ANSI/IEEE Std. 142-1991. IEEE Recommended Practice for Grounding of Industrial and Commercial
            Power Systems (IEEE Green Book.).

            ANSI/IEEE Std. 241-1990. IEEE Recommended Practice for Electric Power Systems in Commercial
            Buildings (Gray Book).

            ANSI/IEEE Std. 242-1986. IEEE Recommended Practice for Protection and Coordination of Industrial
            and Commercial Power Systems (Buff Book).

            ANSI/IEEE Std. 399-1990. IEEE Recommended Practice for Power Systems Analysis (Brown Book).

            ANSI/IEEE Std. 400-1991. IEEE Guide for Making High-Direct-Voltage Tests on Power Cable Systems
            in the Field.

            ANSI/IEEE Std. 421B-1979. IEEE Standard for High-Potential-Test Requirements for Excitation
            Systems for Synchronous Machines.

            ANSI/IEEE Std. 446-1987. IEEE Recommended Practice for Emergency and Standby Power Systems
            for Industrial and Commercial Applications (Orange Book).
     ANSI/IEEE Std. 450-1987. IEEE Recommended Practice for Maintenance, Testing, and Replacement
     of Large Lead Storage Batteries for Generating Stations and Substations.

     ANSI/IEEE Std. 493-1990. IEEE Recommended Practice for the Design of Reliable Industrial and
     Commercial Power Systems (Gold Book).

     ANSI/IEEE Std. 602-1986. IEEE Recommended Practice for Electric Systems in Health Care Facilities
     (White Book).

     ANSI/IEEE Std 1100-1992. IEEE Recommended Practice for Powering and Grounding Sensitive
     Electronic Equipment (Emerald Book).

     ANSI/IEEE Std. 1106-1987. IEEE Recommended Practice for Maintenance, Testing, and Replacement
     of Nickel-Cadmium Storage Batteries for Generating Stations and Substations.

4.   InterNational Electrical Testing Association - NETA
5.
6.   NETA Maintenance Testing Specifications for Electrical Power Distribution Equipment and Systems.

     National Electrical Manufacturer's Association - NEMA

     NEMA Standard for Publication No. AB4-1991: Guidelines for Inspection and Preventive Maintenance
     of Molded-Case Circuit Breakers Used in Commercial and Industrial Applications.

     NEMA Publication MG1: Motors and Generators

7.   National Fire Protection Association - NFPA

     ANSI/NFPA 70-1993: National Electrical Code.

     ANSI/NFPA 70B-1994: Recommended Practice for Electric Equipment Maintenance.

     ANSI/NFPA 70E-1995: Electrical Safety Requirements
     for Employee Workplaces.

     ANSI/NFPA 99-1993: Standard for Healthcare Facilities.

     ANSI/NFPA 101-1991: Life Safety Code.

     ANSI/NFPA 110-1993: Emergency and Standby Power Systems.

     ANSI/NFPA 780-1992: Lightning Protection Code.

8.   Occupational Safety and Health Administration - OSHA
9.   Underwriters Laboratory - UL
3. QUALIFICATIONS OF TESTING FIRM

    1. The testing firm shall be regularly engaged in the testing of electrical equipment devices, installations, and
        systems.

    2. The testing firm shall utilize technicians who are regularly employed by the firm for testing services.

4. DIVISION OF RESPONSIBILITY

    1. The contractor/owner shall supply a suitable and stable source of electrical power to each test site. The testing
        firm shall specify the specific power requirements.

    2. The contractor/owner shall notify the testing firm when equipment becomes available for acceptance tests. Work
        shall be coordinated to expedite project scheduling.

    3. The project electrical engineer shall supply a short-circuit analysis and coordination study, a protective device
        setting sheet, a complete set of electrical plans, specifications, and any pertinent change orders to the testing
        firm prior to commencement of testing.

    4. The testing firm shall notify the owner's representative prior to commencement of any testing.

    5. Any system, material, or workmanship which is found defective on the basis of acceptance tests shall be reported.

    6. The testing firm shall maintain a written record of all tests and shall assemble and certify a final test report.

    7. Safety and Precautions

    8. Safety practices should include, but are not limited to, the following requirements:

    9. Occupational Safety and Health Act.

         1. Accident Prevention Manual for Industrial Operations, National Safety Council.

         2. Applicable state and local safety operating procedures.

         3. Owner's safety practices.

         4. ANSI/NFPA 70E, Electrical Safety Requirements for Employee Workplaces.

         5. American National Standards for Personnel Protection: Lockout/Tagout.

    10. All tests shall be performed with apparatus de-energized except where otherwise specifically required.

    11. The testing organization shall have a designated safety representative on the project to supervise operations with
        respect to safety.

5. GENERAL

    1. Suitability of Test Equipment

         1. All test equipment shall be in good mechanical and electrical condition.

         2. Split-core current transformers and clamp-on or tong-type ammeters require careful consideration of the
            following in regard to accuracy:

              1.   Position of the conductor within the core.

              2.   Clean, tight fit of the core pole faces.

              3.   Presence of external fields.
         4.   Accuracy of the current transformer ratio in addition to the accuracy of the secondary meter.

     3. Selection of metering equipment should be based on a knowledge of the waveform of the variable being
        measured. Digital multimeters may be average or RMS sensing and may include or exclude the dc
        component. When the variable contains harmonics or dc offset and, in general, any deviation from a pure
        sine wave, average sensing, RMS scaled meters may be misleading.

     4. Field test metering used to check power system meter calibration must have an accuracy higher than that of
        the instrument being checked.

     5. Accuracy of metering in test equipment shall be appropriate for the test being performed but not in excess of
        two percent of the scale used.

     6. Waveshape and frequency of test equipment output waveforms shall be appropriate for the test and tested
        equipment.

2. Test Instrument Calibration

     1. The testing firm shall have a calibration program which assures that all applicable test instruments are
        maintained within rated accuracy.

     2. The accuracy shall be directly traceable to the National Institute of Standards and Technology. (NIST).

     3. Dated calibration labels shall be visible on all test equipment.

     4. Records, which show date and results of instruments calibrated or tested, must be kept up-to-date.

     5. Up-to-date instrument calibration instructions and procedures shall be maintained for each test instrument.

     6. Calibrating standard shall be of higher accuracy than that of the instrument tested.

3. Test Report

     1. The test report shall include the following:

         1.   Summary of project.

         2.   Description of equipment tested.

         3.   Description of test.

         4.   Test results.

         5.   Analysis and recommendations.

     2. Furnish a copy or copies of the complete report to the owner as required in the acceptance contract.
6. Short-Circuit Analysis and Coordination Studies

    1. Scope of Services

        1. Provide a current and complete short-circuit study, equipment-interrupting or
           withstand evaluation, and a protective-device coordination study for the electrical
           distribution system.

        2. The studies shall include all portions of the electrical distribution system from the
           normal and alternate sources of power throughout the low-voltage distribution
           system. Normal system operating method, alternate operation, and operations
           which could result in maximum-fault conditions shall be thoroughly covered in the
           study.

    2. Short-Circuit Study

    3. The study shall be in accordance with applicable ANSI and IEEE standards.

    4. The study input data shall include the utility company's short-circuit single- and three-
        phase contribution, with the X/R ratio, the resistance and reactance components of each
        branch impedance, motor and generator contributions, base quantities selected, and all
        other applicable circuit parameters.

    5. Short-circuit momentary duties and interrupting duties shall be calculated on the basis of
        maximum available fault current at each switchgear bus, switchboard, motor control
        center, distribution panelboard, pertinent branch circuit panelboards, and other
        significant locations through the system.

    6. Equipment Evaluation Study

        1. An equipment evaluation study shall be performed to determine the adequacy of
           circuit breakers, controllers, surge arresters, busways, switches, and fuses by
           tabulating and comparing the short-circuit ratings of these devices with the
           maximum short-circuit momentary and interrupting duties. Evaluation study should
           be submitted prior to final approval of equipment submittals.

    7. Protective-Device Coordination Study

    8. A protective-device coordination study shall be performed to select or to verify the
        selection of power fuse ratings, protective-relay characteristics and settings, ratios, and
        characteristics of associated voltage and current transformers, and low-voltage breaker
        trip characteristics and settings.

    9. The coordination study shall include all voltage classes of equipment from the utility's
        incoming line protective device down to and including each motor control center and/or
        panelboard. The phase and ground overcurrent protection shall be included as well as
        settings for all other adjustable protective devices.

    10. Coordination shall be in accordance with requirements of the National Electrical Code
        and the recommendations of the IEEE Standard 399.

    11. The selection and settings of the protective devices shall be provided separately in a
        tabulated form listing circuit identification, IEEE device number, current transformer
        ratios, manufacturer, type, range of adjustment, and recommended settings. A tabulation
        of the recommended power fuse selection shall be provided for all fuses in the system.
   Discrepancies, problem areas, or inadequacies shall be promptly brought to the owner's
   attention.

12. Study Report

13. The results of the power-system studies shall be summarized in a final report.

14. The report shall include the following sections:

15. Description, purpose, basis, and scope of the study and a single-line diagram of the
    portion of the power system which is included within the scope of study.

16. Tabulations of circuit breaker, fuse, and other equipment ratings versus calculated short-
    circuit duties and commentary regarding same.

17. Protective device time versus current coordination curves, tabulations of relay and circuit
    breaker trip settings, fuse selection, and commentary regarding same.

18. Fault-current tabulations including a definition of terms and a guide for interpretation.

19. Implementation

20. The owner shall engage an independent testing firm for the purpose of inspecting,
    setting, testing, and calibrating the protective relays, circuit breakers, fuses, and other
    applicable devices as recommended in the power-system study report.

21. Load Flow Studies - Reserved

22. Stability Studies - Reserved

23. Switching Transients Studies - Reserved

24. Motor Starting Studies - Reserved

25. Harmonic Analysis - Reserved

26. Ground Mat Studies - Reserved

27. Cable Ampacity Studies - Reserved

28. Reliability Studies - Reserved

								
To top