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GB/T 31983.11-2015 English PDF (GBT31983.11-2015)

GB/T 31983.11-2015 English PDF (GBT31983.11-2015)

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GB/T 31983.11-2015: Narrow band power line communication over low-voltage mains -- Part 11: 3 kHz to 500 kHz frequency bands and classifications, limits of output level and electromagnetic disturbances

This Part of GB/T 31983 specifies the frequency band classification for different applications, the output level limit in the available frequency band, the conducted and radiated disturbance limit; and gives the measurement method. This Part does not specify signal modulation methods, coding methods or functional characteristics, nor does it include environmental requirements and tests.
GB/T 31983.11-2015
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 17.220.20
N 22
Narrow Band Power Line Communication over
Low-Voltage Mains ?€? Part 11: 3 kHz to 500 kHz
Frequency Bands and Classifications, Limits of
Output Level and Electromagnetic Disturbances
ISSUED ON: SEPTEMBER 11, 2015
IMPLEMENTED ON: APRIL 01, 2016
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Classification and Application of Frequency Band ... 7
4.1 Overview ... 7
4.2 3kHz~95kHz frequency band ... 7
4.3 95kHz~150kHz frequency band ... 7
4.4 150kHz~500kHz frequency band ... 8
5 Output Level ... 8
5.1 General requirements ... 8
5.2 Output signal measurement ... 10
5.3 Maximum output level ... 11
5.4 Output level identification ... 21
6 Limits of Electromagnetic Disturbance ... 21
6.1 Overview ... 21
6.2 Conducted disturbance limit ... 22
6.3 Limit of radiated disturbance field strength ... 23
6.4 Disturbance power limit ... 23
6.5 Other requirements to limit disturbance ... 24
7 Test Conditions ... 24
8 Safety Warning ... 25
Appendix A (Normative) Attenuation Characteristics of Measuring Instruments above 150kHz ... 27
Appendix B (Normative) Measurement Method (3kHz~30MHz) ?€? Artificial Mains Network ... 29
Appendix C (Informative) Design of Artificial Mains Network Used to Indicate the Signal Transmission Performance ... 30
Narrow Band Power Line Communication over
Low-Voltage Mains ?€? Part 11: 3 kHz to 500 kHz
Frequency Bands and Classifications, Limits of
Output Level and Electromagnetic Disturbances
1 Scope
This Part of GB/T 31983 specifies the frequency band classification for different applications, the output level limit in the available frequency band, the conducted and radiated disturbance limit; and gives the measurement method.
This Part does not specify signal modulation methods, coding methods or functional characteristics, nor does it include environmental requirements and tests. This Part is applicable to electrical equipment that uses signals in the frequency range of 3kHz ~ 500kHz for information transmission on low-voltage power distribution systems or on user-side power devices.
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB/T 4365 Electrotechnical Terminology - Electromagnetic Compatibility
GB/T 6113.101-2008 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods - Part 1-1: Radio Disturbance and Immunity Measuring Apparatus - Measuring Apparatus
GB/T 6113.102-2008 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods - Part 1-2: Radio Disturbance and Immunity Measuring Apparatus - Ancillary Equipment - Conducted Disturbance
GB/T 6113.104-2008 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods - Part 1-4: Radio Disturbance and Immunity Measuring Permanently installed AC power network system consisting of wires or cables, but does not include flexible cables that users can connect or disconnect.
3.9 Sensitive equipment
A device that is subject to interference may cause adverse effects and cause injury. 4 Classification and Application of Frequency Band
4.1 Overview
In order to ensure the coexistence between different applications and prevent mutual interference, this Part establishes various applications by classifying the frequency bands.
NOTE: If it causes interference to radio communication services, additional provisions may be adopted.
4.2 3kHz~95kHz frequency band
This frequency band is suitable for monitoring and controlling electrical equipment on low-voltage power distribution networks. The main equipment includes various smart metering instruments and monitoring and control terminals or devices.
NOTE: A typical application example of this frequency band is the collection of electricity consumption information of the Advanced Metering Infrastructure (AMI).
4.3 95kHz~150kHz frequency band
This frequency band is suitable for:
a) Monitor and control low-voltage electrical equipment in residential, commercial or industrial premises;
b) Monitor and control electrical equipment installed or connected to the low-voltage power distribution network outside the site.
NOTE 1: Typical application examples of a) may be intelligent buildings, intelligent homes and home energy management.
NOTE 2: Typical application examples of b) may be street lamp control, energy metering, and electric vehicle charging and discharging.
The equipment used in this frequency band is divided into Class-122 and Class-134 equipment. According to the specified measurement method, the maximum output level of Class-122 equipment is 122dB(??V); and the maximum output level of Class- In order to prevent damage to the equipment under test or test instrument, it shall be ensured that the power supply voltage applied to the equipment under test meets the power supply voltage range requirements specified by the equipment manufacturer. Generally, differential mode signaling shall be used. The common-mode signaling on the fixed mains network can only be used in commercial or industrial premises and work under the conditions described in Clause 7.
If the common mode signal sent from the fixed power outlet to the fixed mains network is lower than the out-of-band disturbance limit specified in Clause 6, the common-mode signaling is allowed on a flexible cable.
5.1.2 Single-phase equipment measurement circuit
To measure the output level in the frequency range of 3kHz~9kHz, an artificial mains network (AMN, Artificial Mains Network) that meets the impedance characteristics described in Figure 2 shall be used.
To measure the output level in the frequency range of 9kHz~150kHz, a single-phase artificial mains network complying with 4.2 of GB/T 6113.102-2008 shall be used. To measure the output level in the frequency range of 150kHz~500kHz, a single-phase artificial mains network complying with 4.3 of GB/T 6113.102-2008 shall be used. NOTE: If the impedance (modulus and phase angle) of the single-phase artificial mains network complying with 4.2 of GB/T 6113.102-2008 in the frequency range of 150kHz ~ 500kHz meets the impedance requirements of 4.3 in GB/T 6113.102-2008; then the former single-phase artificial mains network is also suitable for the measurement of the frequency range of 150kHz~500kHz. Pay attention to the NOTE of 4.2 in GB/T 6113.102-2008.
5.1.3 Three-phase equipment measurement circuit
To measure the output level in the frequency range of 3kHz~9kHz, a three-phase artificial mains network that meets the impedance characteristics described in Figure 2 shall be used.
To measure the output level in the frequency range of 9kHz~150kHz, a three-phase artificial mains network conforming to 4.2 of GB/T 6113.102-2008 shall be used. To measure the output level in the frequency range of 150kHz~500kHz, a three-phase artificial mains network conforming to 4.3 of GB/T 6113.102-2008 shall be used. NOTE 1: The NOTE of 5.1.2 also apply.
If the user manual of the equipment clearly indicates that the three-phase equipment can connect all phase terminals to the same phase line as a single-phase equipment, the difference in load conditions between three-phase and single-phase may cause a) The signal bandwidth < 5kHz. The output level measured on any phase line shall not exceed 128dB(??V) at 9kHz, and shall not exceed 114dB(??V) at 95kHz. It decreases linearly with the logarithm of the frequency between 9kHz and 95kHz. b) The signal bandwidth is ???5kHz. The output level measured on any phase line shall not exceed 128dB(??V). In addition, when using a 200Hz bandwidth peak detector to measure, any part of the signal spectrum shall not exceed 114dB(??V). NOTE: NOTE 3 of 5.1.3 also applies.
5.3.2.3 95kHz~150kHz frequency band
The artificial mains network conforming to the impedance characteristics of Figure 1a) of 4.2 in GB/T 6113.102-2008 shall be used for measurement, see 5.3.1.2 for the description of the artificial mains network.
Measurement shall be made according to 5.2.2; the equipment connection is shown in Figure 7.
The output level shall be limited according to the type of used equipment as follows: a) Class-122 equipment. The output level measured on any phase line shall not exceed 116dB(??V).
b) Class-134 equipment. The output level measured on any phase line shall not exceed 128dB(??V).
NOTE: NOTE 3 of 5.1.3 also applies.
5.3.2.4 150kHz~500kHz frequency band
The artificial mains network conforming to the impedance characteristics of Figure 1b) of 4.3 in GB/T 6113.102-2008 shall be used for measurement, see 5.3.1.4 for the description of the artificial power supply network.
Measurement shall be made according to 5.2.2; the equipment connection is shown in Figure 7.
The output level measured on any phase line shall not exceed 128dB(??V). In addition, when using a 200Hz bandwidth peak detector to measure, any part of the signal spectrum shall not exceed 114dB(??V).
NOTE: NOTE 3 of 5.1.3 also applies.
5.3.3 Three-phase equipment transmits simultaneously between phase lines (no neutral line)
The output level shall be limited by the following signal bandwidth:
a) The signal bandwidth < 5kHz. The output level measured on any phase line shall not exceed 134dB(??V) at 9kHz, and shall not exceed 120dB(??V) at 95kHz; It decreases linearly with the logarithm of the frequency between 9kHz and 95kHz. b) The signal bandwidth is ???5kHz. The output level measured on any phase line shall not exceed 134dB(??V). In addition, when using a 200Hz bandwidth peak detector to measure, any part of the signal spectrum shall not exceed 120dB(??V). 5.3.3.3 95kHz~150kHz frequency band
The artificial mains network conforming to the impedance characteristics of Figure 1a) of 4.2 in GB/T 6113.102-2008 shall be used for measurement, see 5.3.1.2 for the description of the artificial power supply network.
Measurement shall be made according to 5.2.2; the equipment connection is shown in Figure 8.
The output level shall be limited according to the type of used equipment as follows: a) Class-122 equipment. The output level measured on any phase line shall not exceed 122dB(??V).
b) Class-134 equipment. The output level measured on any phase line shall not exceed 134dB(??V).
5.3.3.4 150kHz~500kHz frequency band
The artificial mains network conforming to the impedance characteristics of Figure 1b) of 4.3 in GB/T 6113.102-2008 shall be used for measurement, see 5.3.1.4 for the description of the artificial mains network.
Measurement shall be made according to 5.2.2; the equipment connection is shown in Figure 8.
The output level measured on any phase line shall not exceed 134dB(??V). In addition, when using a 200Hz bandwidth peak detector to measure, any part of the signal spectrum shall not exceed 120dB(??V).
5.3.4 Three-phase equipment transmits on single-phase
The measurement shall be made on the phase line or the neutral line. The limits specified in 5.3.1 for the relevant frequency range is applicable to this measurement. 5.3.5 Summary of maximum output level
Appendix B
(Normative)
Measurement Method (3kHz~30MHz) ?€? Artificial Mains Network
B.1 Overview
In order to measure the terminal voltage generated by the signal transmission equipment, a V-shaped artificial mains network is required to provide a specified impedance to the terminal of the device under test within the radio frequency range; and an additional inductor is required to isolate the test circuit from the useless radio frequency signal on the power supply.
This Appendix gives the relevant information of the artificial mains network, all other requirements are given in GB/T 6113.102-2008.
B.2 Impedance
B.2.1 3kHz~9kHz frequency range
For the frequency range of 3kHz~9kHz, the correction network of 4.2 and Figure 4 in GB/T 6113.102-2008 shall be used, as shown in Figure 3.
The impedance of the 0.47??F capacitor C3 (see Figure 3) is not negligible. Unless otherwise specified, the reading of the measuring device needs to be corrected due to the voltage dividing caused by this impedance.
B.2.2 9kHz~30MHz frequency range
The impedance of the V-shaped artificial mains network shall satisfy the 50??/50??H+5?? and 50??/50??H specified in 4.2 Figure 1a) and 4.3 Figure 1b) of GB/T 6113.102-2008. NOTE 1: Pay attention to the NOTE of 4.2 in GB/T 6113.102-2008.
NOTE 2: Pay attention to the consideration of correction factors in the detailed description of Table A.1 in Appendix A.2 of GB/T 6113.102-2008.

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