NEMA C12 30 TR-2013 Test Requirements for Metering Devices Equipped with Service Switches.pdf

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1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA C12.30 TR-2013Test Requirements for: Metering Devices Equipped with Service SwitchesNEMA C12.30 TR-2013 Test Requirements for: Metering Devices Equipped with Service Switches A Technical Report prepared by NEMA and registere

2、d with ANSI Secretariat: National Electrical Manufacturers Association Registered February 16, 2014 American National Standards Institute, Inc. NEMA C12.30 TR-2013 2 NOTICE AND DISCLAIMER The information in this publication was considered technically sound by a consensus among persons engaged in its

3、 development at the time it was approved. Consensus does not necessarily mean there was unanimous agreement among every person participating in the development process. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the document herein is one,

4、 are developed through a voluntary standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. Although NEMA administers the process and establishes rules to promote fairness in the develo

5、pment of consensus, it does not write the documents, nor does it independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property

6、, or other damages of any nature, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or completen

7、ess of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any particular purpose(s) or need(s). NEMA does not undertake to guarantee the performance of any individual manufacturers or sellers products or services by virtue of this

8、 standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should

9、 rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstance. Information and other standards on the topic covered by this publication may be available from other sources, which t

10、he user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or heal

11、th purposes. Any certification or other statement of compliance with any health- or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. NEMA C12.30 TR-2013 3 Table of Contents 1 Scope 7 2 Reference

12、s 7 3 Definitions . 7 4 Types of Metering Devices . 8 4.1 Determination of Failure and Rejection 8 4.2 Meter Type Certification Rejection Criteria 8 5 Performance tests external influences performance verification . 9 5.1 Temperature rise (Section 4.7.2.9, Test No. 9) . 9 5.2 Metering device insulat

13、ion test (Section 4.7.3.1, Test No. 15) 12 5.3 Service Switch insulation test 12 5.4 Voltage interruptions test (Section 4.7.3.2, Test No. 16) . 12 5.5 Effect of high voltage line surges (Section 4.7.3.3, Test No. 17) 12 5.5.1 100 kHz ring wave (Section 4.7.3.3.1) 12 5.5.2 1.2/50 microsecond 8/20 mi

14、crosecond Combination Wave (Section 4.7.3.3.2) 12 5.6 Effect of temporary overloads (Section 4.7.3.6, Test No. 20) . 13 5.7 Effect of electrical fast transient/burst test (Section 4.7.3.11, Test No. 25) 13 5.8 Effect of electrical oscillatory SWC test (Sections 4.7.3.11a, Test No. 25a) . 14 5.9 Effe

15、ct of radio frequency interference (Section 4.7.3.12, Test No. 26) . 14 5.10 Effect of electrostatic discharge (ESD) (Section 4.7.3.14, Test No. 28) . 15 5.11 Effect of operating temperature (Section 4.7.3.16, Test No. 30) . 15 5.12 Effect of relative humidity (Section 4.7.3.17, Test No. 31) 16 5.13

16、 Mechanical shock (Section 4.7.3.18, Test No. 32) 16 5.14 Transportation drop (Section 4.7.3.19, Test No. 33) . 16 5.15 Mechanical vibration (Section 4.7.3.20, Test No. 34) 17 5.16 Transportation vibration (Section 4.7.3.21, Test No. 35) . 17 5.17 Continuous Class Ampere Test for Service Switch . 17

17、 5.18 Cycling Operation and Heat Rise of Service Switch . 18 5.19 Through Fault Test (Section 4.7.3.6.3 Test No. 20) . 18 5.20 Close on Fault 18 5.21 Load Side Voltage Sense 19 5.21.1 Informative Note . 19 5.21.2 Test Procedure . 19 NEMA C12.30 TR-2013 4 Foreword With increasing emphasis being place

18、d on technical reports both in the European Community and internationally, it is important to have an established mechanism for the registration of such technical reports. This is particularly important in areas of developing technology that may eventually be covered by International Standards but f

19、or which the only documentation currently available is an International Technical Report. Accredited standards developers develop technical reports that are useful in conjunction with American National Standards. These are often informational or tutorial in nature, or give methods for application of

20、 an American National Standard. Registration of such documents is undertaken by the American National Standards Institute (ANSI) to encourage widespread use and acceptance, not only of the technical report, but also of the related American National Standard. All material contained in a technical rep

21、ort that has been registered with ANSI is informational in nature. Technical reports may include for example reports of: technical research, tutorials, factual data obtained from a survey carried out among standards developers and/or national bodies, or information on the “state of the art“ in relat

22、ion to standards of national or international bodies on a particular subject. Technical reports may not to be used as a way to circumvent the regular consensus process for approval of an American National Standard. With the advent of AMI (Advanced Metering Infrastructure) systems, several meter manu

23、facturers have introduced residential meters with a built in service switch. The current ANSI standards do not adequately cover these types of meters. This technical report provides a testing basis to these types of meters with the intention to lead to a standardized method for testing electricity m

24、eters with an integral service switch. Sections specific to ANSI C12.1-2008 have been referenced within the various tests of this document. This technical report was developed within a working group under the guidance of ANSI C12 Subcommittee 1 with the intention for it to be used in conjunction wit

25、h the ANSI C12.1-2008 standard. The use of both will help facilitate proper testing of meters with integral service switches. This technical report was processed and approved for submittal to ANSI by Accredited Standards Committee for Electricity Metering, C12. At the time the committee approved thi

26、s technical report, the C12 Committee had the following members: Tom Nelson, Chairperson ANSI C12 Paul Orr, Secretary ANSI C12 Main Committee Organization Represented: Name of Representative: Organization Represented: Name of Representative: General Interest Austin Energy H. Millican MET Laboratorie

27、s, Inc. R. Subramaniam Center for Neighborhood Technology L. Kotewa NIST Power Measurement T. Nelson W. Hardy EnerNex Corporation A. Snyder SAIC D. Scott Future DOS R accuracy class: current class: test-ampere rating; frequency; form designation; method of mounting; demand interval; scale capacity;

28、number of channels; pulse devices; clock interval; battery carry over; input/output configurations; terminal arrangements; scale factors; auxiliary devices; and with service switches. 4.1 Determination of Failure and Rejection This technical report specifies rejection criteria for the following test

29、s that are in addition to that specified in Section 4.6.2 of ANSI C12.1-2008. These tests are Temperature rise, Insulation, Voltage interruptions test, Effect of high voltage line surges, Effect of temporary overloads, Effect of electrical fast transient/burst, Effect of electrical oscillatory SWC t

30、est, Effect of radio frequency Interference, Effect of electrostatic discharge (ESD), Effect of relative humidity, Mechanical shock, Transportation drop, Mechanical vibration, and Transportation vibration. Additional tests within this standard may evaluate the Service Switch as indicated therein. 4.

31、2 Meter Type Certification Rejection Criteria The meter type certification will be rejected if the Service Switch of the metering device fails to open on the first attempt unless indicated otherwise by the relevant test. The Service Switch shall show no signs of malfunction, sticking, or welding of

32、contacts or reluctance to latch unless indicated otherwise by the relevant test. (See C12.1-2008 Section 4.6.2.1, Failure.) NEMA C12.30 TR-2013 9 5 Performance tests external influences performance verification (Reference: ANSI C12.1-2008 Section 4.7.3.) A Service Switch Check shall be performed. Th

33、is check shall be made before and after the test procedure is performed. During this check the Service Switch shall meet the requirements of Section 4.2 Meter Type Certification Rejection Criteria in this document. A Service Switch Check shall be required before and after a group of tests consisting

34、 of two or more of the following tests: Mechanical shock, Mechanical vibration, Transportation drop, and Transportation vibration. An Accuracy Performance Check shall be performed per (ANSI C12.1, Section 4.7.3) after the following tests: Insulation, Voltage interruptions, Effect of high voltage lin

35、e surges, Effect of electrical fast transient/burst test, Effect of electrical oscillatory SWC test, Effect of radio frequency interference, Effect of electrostatic discharge (ESD), Effect of operating temperature, Effect of relative humidity, Mechanical shock, Transportation shock, Mechanical vibra

36、tion, and Transportation vibration. Section references and test numbers below refer to ANSI C12.1-2008. 5.1 Temperature rise (Section 4.7.2.9, Test No. 9) Meters equipped with a Service Switch shall follow the same requirements stated in section 4.7.2.9 except that the temperature detector location

37、is on the flat side of the external meter terminal for both the metering device and the simulated meter. The measuring point shall be located on the center line of the terminal as close as possible to the meter base without coming into contact with other parts (e.g., cotter pins). See Figures 1 and

38、2. The Service Switch shall be in a Closed State during test. Upon completion of the test a Service Switch Check shall be performed. NEMA C12.30 TR-2013 10 Figure 1 Dimensions for Jumper Bars of Simulated Meter Temperature-Rise Test for Single-phase and Polyphase Meters (Maximum Rating 101 200 A Rat

39、ing) Temperature Detector Location (Meters equipped with Service Switch) NEMA C12.30 TR-2013 11 Figure 2 Dimensions for Jumper Bars of Simulated Meter Temperature-Rise Test for Single-Phase and Polyphase Meters (Maximum Rating 201 320 A Rating) Temperature Detector Location (Meters equipped with Ser

40、vice Switch) NEMA C12.30 TR-2013 12 5.2 Metering device insulation test (Section 4.7.3.1, Test No. 15) With the metering device voltage and current circuits de-energized and Service Switch in the Closed State, the insulation between current carrying parts of separate circuits and between current-car

41、rying parts and other metallic parts shall be capable of withstanding the application of a sinusoidal voltage of 2.5 kV rms, 60 Hz for 1 minute. The input circuit of the pulse initiators with independent power supplies shall be tested at 1.5kV rms, 60 Hz for one minute. For both the 1.5 and 2.5 kV r

42、ms tests the leakage current shall not exceed 0.005 Amps per circuit. Low-voltage electronic circuits operating at less than 40 V rms, and all output relay terminals, shall not be subject to this test. It is permissible to disconnect voltage sensing circuitry or power supply while performing this te

43、st. 5.3 Service Switch insulation test A Service Switch shall provide 1 kV rms isolation between the line side and the load side when in an Open State. This shall be verified by performing the following test. With the metering device voltage and current circuits de-energized and the Service Switch i

44、n the open state the insulation between open contacts of each separate current circuit shall be capable of withstanding the application of a sinusoidal voltage of 1 kV rms, 60 Hz for 1 minute. The leakage current shall not exceed 0.005 Amps per circuit. It is permissible to disconnect voltage sensin

45、g circuitry or power supply while performing this test. 5.4 Voltage interruptions test (Section 4.7.3.2, Test No. 16) No current shall be applied to the metering device current coils. Voltage shall be completely interrupted for six power line cycles (100 ms, for 60 Hz systems). The voltage interrupt

46、ion shall be applied ten times within an interval of no more than 10 seconds. This test may be omitted for electromechanical meters and registers. For meter devices containing a Service Switch, the test shall be conducted with the Service Switch in both the Closed State and Open State. The Service S

47、witch shall not change states during this test. 5.5 Effect of high voltage line surges (Section 4.7.3.3, Test No. 17) When a Service Switch is employed the test shall be conducted with the switch in both the Closed State and Open State and shall not change state during the test. Before and after run

48、ning the set of Ring Wave and Combination Wave tests, a Service Switch Check shall be performed. It is not necessary to run the Service Switch Check between the two following subtests. 5.5.1 100 kHz ring wave (Section 4.7.3.3.1) This test subjects the power input of the meter device to a 100 kHz Rin

49、g Wave with a Peak Voltage of 6 kV and Short-Circuit Peak Current of 0.5 kA. The standard 0.5 s 100 kHz Ring Wave applied to the metering device, shall be for Location Category B, as described in IEEE C62.41.2-2002, Table 2. 5.5.2 1.2/50 microsecond 8/20 microsecond Combination Wave (Section 4.7.3.3.2) This test subjects the AC power input of the metering device to a 1.2/50 s 8/20 s combination wave with a peak voltage of 6 kV and peak current of 3 kA. The standard 1.2/50 s 8/20 s combination wave applied to the metering device shall be for Location Category B