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GB 14287.3-2014 PDF EnglishSearch result: GB 14287.3-2014_English: PDF (GB14287.3-2014)
GB14287.3-2014: PDF in EnglishGB 14287.3-2014 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 13.220.20 C 81 Replacing GB 14287.3-2005 Electrical fire monitoring system - Part 3: Temperature sensing electrical fire monitoring detector ISSUED ON: JULY 24, 2014 IMPLEMENTED ON: JUNE 1, 2015 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 6 4 Classification ... 7 5 Requirements... 7 6 Tests ... 13 7 Inspection rules ... 22 8 Markings ... 23 Electrical fire monitoring system - Part 3: Temperature sensing electrical fire monitoring detector 1 Scope This Part of GB 14287 specifies terms and definitions, classification, requirements, tests, inspection rules and marking of temperature sensing electrical fire monitoring detectors. This Part applies to temperature sensing electrical fire monitoring detectors in electrical fire monitoring systems. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the dated edition cited applies. For undated references, the latest edition of the referenced document (including all amendments) applies. GB 4706.1 Household and similar electrical appliances - Safety - Part 1: General requirements GB/T 9969 General principles for preparation of instructions for use of industrial products GB12978 Rules for test of fire electronic products GB 14287.2 Electrical fire monitoring system - Part 2: Residual current electrical fire monitoring detectors GB 16838 Environmental test methods and severities for fire electronic products GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test the detector shall send an alarm signal within 40 s and light up the alarm indicator light. The alarm indication of non-independent detectors shall be maintained until the electrical fire monitoring equipment connected to it is reset, and the alarm indication of independent detectors shall be maintained until it is manually reset. 5.2.4 The alarm temperature of detectors shall be set in the range of 45 °C ~ 140 °C; the absolute value of the difference between the alarm value and the set value shall not be greater than 5 % of the set value. 5.2.5 The display error of detectors with real-time temperature display function shall not be greater than 5 %. 5.2.6 If there is a break or a short in the connection line between the signal processing unit and the external temperature sensor of non-independent detectors, the detector shall send a fault signal to the electrical fire monitoring equipment connected to it. 5.2.7 The alarm value of detectors can be set in the detector or the electrical fire monitoring equipment connected to it, and on-site settings can be made only through special tools, passwords and other means. 5.2.8 Combined multi-sensing detectors with function of measuring residual current shall also meet the requirements of GB 14287.2. 5.3 Monitoring alarm function 5.3.1 Detectors in the alarm state shall send sound and light alarm signals and indicate the alarm value and location. The sound alarm signal can be manually eliminated; there shall be sound elimination instructions when the sound alarm signal is manually eliminated. When there are other alarm signals input, the sound alarm signal shall be able to be restarted. 5.3.2 Under alarm conditions, the sound pressure level (A weighting) at 1 m in front of its audio device shall be greater than 70 dB and less than 115 dB. 5.3.3 When there is a break or short in the connection line between the signal processing unit and the external temperature sensor, the detector shall be able to send sound and light fault signals. The sound fault signal shall be clearly different from the sound alarm signal. The sound fault signal shall be able to be manually eliminated. The light fault signal shall be maintained until the fault condition is restored. 5.3.4 The sound alarm signal of detectors shall be prior to the sound fault signal. 5.3.5 Independent detectors can be connected to 4 sensors at most. 5.3.6 The alarm information shall be displayed prior to the fault information. In the alarm state, the existing fault information shall be able to be manually queried, and the alarm information and fault information shall not be displayed alternately. 5.3.7 The detector can be equipped with a set of control outputs. When the detector sends alarms, the control output shall operate within 3 s. The performance of the control output shall comply with the specifications of the manufacturer. 5.3.8 The detector shall be able to manually check the its audio device, all the indicator lights on the panel and the function of display. The control output of detectors shall not operate during the self-inspection. 5.4 Communication function 5.4.1 Non-independent detectors shall be able to transmit real-time temperature and fault signals to the associated electrical fire monitoring equipment. 5.4.2 Independent detectors shall have at least one set of communication ports. 5.5 Performance of major components 5.5.1 Indicator lights 5.5.1.1 Each indicator light shall be clearly indicated with its functions in Chinese. 5.5.1.2 Indicator lights shall apply different colors, red indicates the alarm state, yellow indicates the fault state and green indicates the normal state. 5.5.1.3 Indicator lights shall be clearly visible at 3 m in front of it and in ambient conditions where the illuminance does not exceed 500 lx. 5.5.2 Displays 5.5.2.1 Independent detectors shall display information using a digital or letter display. 5.5.2.2 Under the environmental condition with the illumination of not more than 500 lx, the information displayed shall be clearly readable at 0.8 m in front and within 22.5 ° of viewing angle range. 5.5.3 Terminals 5.5.3.1 Detectors shall be equipped with external terminals. 5.5.3.2 Terminals shall be clearly marked with their functions. 5.5.3.3 Strong electrical terminals shall be located inside the detector or protected by safe and reliable protective measures. 5.5.3.4 Strong and weak electrical terminals shall be set separately. 5.5.4 Structure 5.5.4.1 The enclosure of detectors shall be solid and reliable. 5.5.4.2 Detectors shall be installed and fixed in a reliable manner. 5.6 Protection performance The protection performance of detectors shall meet the requirements of GB 23757. 5.7 Repeatability Repeat 6 measurements of the alarm value and alarm time of detectors; the time interval between the two measurements shall not be less than 30 min; the alarm value and alarm time of detectors in each measurement shall meet the requirements of 5.2. 5.8 Insulation resistance When the working voltage of the external live terminals and the power plug of detectors is greater than 50 V, the insulation resistance between the external live terminals and the power plug and the enclosure shall be not less than 100 MΩ in normal atmospheric conditions. 5.9 Leakage current When the detector using AC 220 V/50 Hz AC power supply is worked at 1.06 times the rated voltage, the leakage current shall not exceed 0.5 mA. 5.10 Electrical strength When the working voltage of the external live terminals and the power plug of the detector is greater than 50 V, the external live terminals and the power plug shall be capable of withstanding an electrical strength test with a frequency of 50 Hz and an AC voltage with a RMS voltage of 1250 V and a duration of 60 s ± 5 s. During the test, the detector shall have no discharge or breakdown phenomenon (the breakdown current is not greater than 20 mA); after the test, the performance of the detector shall meet the requirements of 5.2 and 5.3. 5.11 Electromagnetic compatibility The detector shall be capable of accommodating the tests under the conditions specified in Table 1. During the test, it shall maintain the normal monitoring state; after the test, the performance shall meet the requirements of 5.2 and 5.3. NOTE: The normal monitoring state refers to the working state of the monitoring equipment under normal power supply conditions, without fault alarm, self-inspection and other operations. the fault signal transmission of the sample. 6.2.1.4 CHECK the setting of the alarm set value of the sample. 6.2.1.5 For detectors with a real-time temperature display function, check the display error of the temperature of the sample. 6.2.2 Non-contacting detectors 6.2.2.1 FIX the sample on the bracket; MAKE the sample in the normal monitoring state; according to the requirements specified by the manufacturer, ALIGN the sample with the standard blackbody radiation source; ADJUST the distance to make the sample in the radiation range of the blackbody radiation source; MAKE the temperature of the standard blackbody radiation source rise at a rate of not greater than 1 °C/min until the sample alarms; OBSERVE the state of the sample; RECORD the alarm temperature. 6.2.2.2 COVER the standard blackbody radiation source with a baffle; RESET the sample; MAKE the sample in the normal monitoring state; ADJUST the temperature of the standard blackbody radiation source to 20 % higher than the sample’s alarm set value; REMOVE the baffle; START the timer. When the sample sends an alarm signal, observe the state of the sample and record the response time. 6.2.2.3 MAKE the sample in the normal monito.......Source: https://www.ChineseStandard.net/PDF.aspx/GB14287.3-2014 |