NABL NATIONAL ACCREDITATION BOARD FOR TESTING …

1 nabl NATIONAL ACCREDITATION BOARD FOR TESTING AND CALIBRATION LABORATORIES nabl 104 SPECIFIC CRITERIA for ELECTRICAL TESTING LABORATORIES ISSUE NO : 03 AMENDMENT NO : 00 ISSUE DATE: AMENDMENT DATE: -- NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: i AMENDMENT SHEET Sl Page No. ClauseNo. Date of Amendment Amendment made Reasons Signature QM Signature Director 1 2 3 4 5 6 7 8 9 10 NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: ii CONTENTS Sl Title Page Amendment Sheet i Contents ii 1.

2 Introduction 1 2. Scope of Document 2 3. References 3 4. Classification of Tests 4 5. Scope of ACCREDITATION 5 6. Grant of ACCREDITATION 7 7. Management Requirement 8 8. Technical Requirement 9 9. Safety 13 10. Proficiency TESTING in Electrical TESTING 16 Annexure I Tests under Broad Areas 17 Annexure II Sample: Scope of ACCREDITATION 104 Annexure III Instrument Accuracy Limits 107 Annexure IV Important tests for Proficiency TESTING in Electrical TESTING 111 NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: 1/ 118 1. INTRODUCTION In the broad field of Electrical Engineering, various equipment and systems are used to cater to the application for Electrical power generation, transmission, distribution, control, instrumentation, Communication and domestic application.

3 Each one of the products/ equipment requires a wide variety of tests and hence a need of specialized TESTING facility. The field of Electrical TESTING covers tests of an essentially electrical nature performed on instruments, equipment, appliances, components and materials. NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: 2/ 118 2. SCOPE OF DOCUMENT This document sets out the specific criteria requirements for an electrical TESTING laboratory, in addition to the general requirements of ISO/ IEC 17025: 2005. The document also guides the laboratory to write the Scope of ACCREDITATION . Instrument accuracy limits for various parameters and ranges have been indicated. Also various tests where the laboratories can participate in Proficiency TESTING have been listed.

4 NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: 3/ 118 3. REFERENCES 1. ISO/ IEC 17025: 2005 General Requirements for the Competence of TESTING and Calibration Laboratories 2. ISO: 10012: 1992 Quality Assurance Requirements for Measuring Equipment 3. nabl 100 General Information Brochure 4. nabl 130 Specific Criteria for Site TESTING and Site Calibration Laboratories 5. nabl 131 Terms and Conditions for Maintaining ACCREDITATION 6. nabl 133 nabl Guidelines to Accredited Laboratories for use of nabl Logo 7. nabl 141 Guidelines for Estimation and Expression of Uncertainty in Measurement 8. nabl 142 Policy on Calibration and Traceability of Measurements 9.

5 nabl 151 Application Form for TESTING Laboratories 10. nabl 160 Guide for Preparing a Quality Manual 11. nabl 161 Guide for Internal Audit Review and Quality Controls 12. nabl 162 Proficiency TESTING Programme for TESTING and Calibration Laboratories 13. nabl 163 Policies & procedures for Inter-Laboratory Comparisons and/ or Proficiency TESTING 14. nabl 212 Guidance document on Validation of Test Methods 15. nabl 216 Policies and Procedures for Dealing with Adverse Decisions 16. nabl 174 Sample Calculation for Uncertainty of Measurement in Electrical TESTING NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: 4/ 118 4. CLASSIFICATION OF TESTS The field of Electrical TESTING can broadly be classified into following groups of Products & Test facility areas: Group of Products 1.

6 Switchgear equipment 2. Rotating electrical machines 3. Transformers and Reactors 4. Transmission line equipment and accessories 5. Cables and accessories 6. Power Capacitors 7. Lamps, Luminaries and accessories 8. Wiring accessories 9. Domestic Electrical appliances 10. Power Stabilisers and UPS - Stabilised Power Supplies - Uninterrupted Power Systems - Servo Operated AC Voltage Stabilisers 11. Batteries 12. Power system protection relays 13. Measuring instruments - Electrical and Electronic Instruments and Transducers - Electrical and Electronic (Static) Energy Meters 14. Electrical materials - Solid Insulating material - Liquid dielectric materials - Magnetic materials - Conductors Test Facilities 15. High Voltage test facility 16. Short Circuit test facility 17. Electromagnetic interference (EMI) / Electromagnetic compatibility (EMC) test facility 18.

7 Environmental test facility NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: 5/ 118 5. SCOPE OF ACCREDITATION In the field of Electrical TESTING the tests have been classified into Product wise grouping Circuit breaker, Isolator, MCB etc. from Switchgear equipment group. However certain specialized tests, which are performed on a wide range of equipment, have been grouped Test Facility wise High voltage, EMI/ EMC TESTING etc. The laboratories can indicate their scope of ACCREDITATION either product-wise or test facility-wise depending upon their requirement (please refer Annexure I). For the Product wise classification, there are two tables in each group. Table 1 gives the products, alongwith reference to NATIONAL standard (IS) and international standard (IEC).

8 In the absence of IS/ IEC standards, other international standards such as ASTM, ANSI, BS, VDE etc. have been referred. Wherever the year of the standard is mentioned the laboratory shall ensure to specify the latest amendments/ revisions based on TESTING facilities. Table 2 gives the list of tests for the products listed in Table 1. In the Test Facility wise classification, there is only one table Table 3. It gives the list of tests which are performed on a wide range of equipment. These have been grouped Test Facility wise High voltage, EMI/ EMC TESTING etc. When laboratory prepares an application for ACCREDITATION , the laboratory may refer Table 2/ Table 3 for tests and select products from Table 1 and give the range and accuracy of the test performed. The contents of the tables given in the document may not be exhaustive. The laboratory is free to add tests/ products and standards not listed in the tables.

9 The final scope of ACCREDITATION applied for, shall be prepared in the format as given in Annexure II. NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: 6/ 118 The electrical instruments and the basic materials used in various electrical products/ applications, subjected to test(s) falling in more than one field, eg. transformer oil (electrical & chemical), energy meters (electrical & electronics), lamps and luminaries (electrical & photometry), domestic appliances (electrical & mechanical), switches and wiring accessories (electrical & mechanical) etc. are to be covered under electrical field. These shall be subjected to test(s) as specified in the relevant test standard for verifying their required properties and the relevant nabl Specific Criteria shall be followed.

10 However the test(s) under electrical field and the other field(s) shall be clearly identified in the scope of ACCREDITATION . NATIONAL ACCREDITATION BOARD for TESTING and Calibration Laboratories Doc. No: nabl 104 Specific Criteria for Electrical TESTING Laboratories Issue No: 03 Issue Date: Amend No: 00 Amend Date: -- Page No: 7/ 118 6. GRANT OF ACCREDITATION ACCREDITATION is normally granted for the test facilities for which the laboratory is properly equipped and has demonstrated its capability. The extent of a laboratory s scope of ACCREDITATION will therefore vary with the range of work performed, the scope and complexity of the tests involved, the competence of laboratory staff and the capability of equipment available in the laboratory. The ACCREDITATION is accorded to a laboratory for the entire test facilities or to a part of facilities.