GB 14287.3-2014 PDF in English
GB 14287.3-2014 (GB14287.3-2014) PDF English
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Alarm and control system for electric fire protection -- Part 3: Heat detectors for electric fire prevention
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GB 14287.3-2014: PDF in English GB 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 monitoring state; MAKE a break and short in
the connection line between the sample and the external temperature sensor; CHECK
the fault signal transmission of the sample.
6.2.2.4 CHECK the setting of the alarm set value of the sample.
6.2.2.5 For detectors with a real-time temperature display function, check the display
error of the temperature of the sample.
6.3 Monitoring alarm function test
6.3.1 In the normal monitoring state of the sample, make the sample send an alarm
signal and observe the state of the sample. Measure the sound pressure level of the
sound alarm signal the sample sends. Manually operate the sound elimination function
and observe the state of the sample. Return the temperature detected by the detector
to normal temperature; manually reset the sample; observe the state of the sample.
6.3.2 In the normal monitoring state of the sample, make a break and a short
respectively in the connection line between the sample and the external temperature
sensor and observe the state of the sample. Manually operate the sound elimination
function and observe the state of the sample. Restore the connection line between the
sample and the external temperature sensor and observe the state of the sample.
6.3.3 For the sample of multi-sensor detectors, set the alarm signal and fault signal
separately for different parts, and observe the state indication and information display
of the sample. Make the sample send a fault signal firstly, and then make the sample
send an alarm signal, and observe the state of the sample; manually reset the sample,
make the sample send an alarm signal firstly, and then set the fault signal in different
circuits, observe the state of the sample.
6.3.4 In the case of having both fault information and alarm information, check the
information display of the sample. In the case where the display can not display all the
information at the same time, manually operate the query function, check the
information display of the sample.
6.3.5 For the sample with a control output function, make the sample send an alarm
signal, and check the control output operation and the output characteristic of the
control output of the sample.
6.3.6 OPERATE the self-inspection function of the sample, and observe the state of
the sample.
6.4 Communication function test
6.4.1 CHECK the communication port settings and communication functions of the
sample according to the requirements of the manufacturer (including communication
mode, farthest communication distance and communication line characteristics).
6.4.2 When communicating with the electrical fire monitoring equipment, check the
temperature display of the sample on the electrical fire monitoring equipment.
6.4.3 MAKE the sample in the fault state, and check the fault information display of the
sample on the electrical fire monitoring equipment.
6.5 Repeatability test
REPEAT 6 measurements of the alarm value of the sample according to the method
in 6.2, and record the alarm temperature and alarm time of each measurement.
6.6 Insulation resistance test
6.6.1 Test procedure
6.6.1.1 Under normal atmospheric conditions, apply a 500 V ± 50 V DC voltage to the
following parts of the sample with an insulation resistance test device:
a) between the enclosure and the external live terminal with a working voltage
greater than 50 V;
6.8.1.2 The test lasts for 60 s ± 5 s, and then make the test voltage lower than the
rated voltage of the sample at a rate of 100 V/s ~ 500 V/s before power off.
6.8.1.3 After the test, connect the sample connected with the detector provided by the
manufacturer, turn on the power supply, make the sample in the normal monitoring
state, and test according to the method specified in 6.2 and 6.3.
6.8.2 Test equipment
It shall electrical strength test devices complying with following technical requirements:
a) test voltage: continuously adjustable voltage of 0 V ~ 125 0V (RMS), frequency
of 50 Hz;
b) voltage rise and fall rate: 100 V/s ~ 500 V/s;
c) duration: 60 s ± 5 s.
6.9 Radiated, radio-frequency, electromagnetic field immunity test
6.9.1 Test procedure
6.9.1.1 ARRANGE the sample according to the specifications of GB/T 17626.3; TURN
on the power supply; MAKE it be at the normal monitoring state for 20 min.
6.9.1.2 According to the test method specified in GB/T 17626.3, carry out the
interference test of the conditions shown in Table 1 to the sample, observe and record
the working state of the sample.
6.9.1.3 CARRY out the performance test according to the method of 6.2 and 6.3.
6.9.2 Test equipment
The test equipment shall meet the requirements of GB/T 17626.3.
6.10 Immunity to conducted disturbances, induced by radio-frequency fields
6.10.1 Test procedure
6.10.1.1 ARRANGE the sample according to the specifications of GB/T 17626.6;
TURN on the power supply; MAKE it be at the normal monitoring state for 20 min.
6.10.1.2 According to the test method specified in GB/T 17626.6, carry out the
interference test of the conditions shown in Table 1 to the sample, observe and record
the working state of the sample.
6.10.1.3 CARRY out the performance test according to the method of 6.2 and 6.3.
6.10.2 Test equipment
The test equipment shall meet the requirements of GB/T 17626.6.
6.11 Electrostatic discharge immunity test
6.11.1 Test procedure
6.11.1.1 ARRANGE the sample according to the specifications of GB/T 17626.2;
TURN on the power supply; MAKE it be at the normal monitoring state for 20 min.
6.11.1.2 According to the test method specified in GB/T 17626.2, carry out the
interference test of the conditions shown in Table 1 to the sample and the coupling
plate, observe and record the working state of the sample.
6.11.1.3 CARRY out the performance test according to the method of 6.2 and 6.3.
6.11.2 Test equipment
The test equipment shall meet the requirements of GB/T 17626.2.
6.12 Electrical fast transient/burst immunity test
6.12.1 Test procedure
6.12.1.1 ARRANGE the sample according to the specifications of GB/T 17626.4;
TURN on the power supply; MAKE it be at the normal monitoring state for 20 min.
6.12.1.2 According to the test method specified in GB/T 17626.4, carry out the
interference test of the conditions shown in Table 1 to the sample, observe and record
the working state of the sample.
6.12.1.3 CARRY out the performance test according to the method of 6.2 and 6.3.
6.12.2 Test equipment
The test equipment shall meet the requirements of GB/T 17626.4.
6.13 Surge (impact) immunity test
6.13.1 Test procedure
6.13.1.1 ARRANGE the sample according to the specifications of GB/T 17626.5;
TURN on the power supply; MAKE it be at the normal monitoring state for 20 min.
6.13.1.2 According to the test method specified in GB/T 17626.5, carry out the
interference test of the conditions shown in Table 1 to the sample, observe and record
the working state of the sample.
6.16.1.1 Rigidly install the sample according to the normal installation method so that
the gravitational force in the same direction is the same as that when it is used (except
when the gravity effect is negligible). The sample can be placed at any height in the
above-mentioned installation. The sample is in the normal monitoring state during the
test.
6.16.1.2 Respectively carry out a sweep cycle at three mutually perpendicular axis in
an acceleration amplitude of 0.981 m/s2 and a sweep rate of 1 oct/min, within the
frequency cycle range of 10 Hz ~ 150 Hz. During the test, observe and record the
working state of the sample.
6.16.1.3 CHECK the appearance and fastening sites of the sample, and carry out the
performance test according to the method of 6.2 and 6.3.
6.16.2 Test equipment
The test equipment (vibration table and fixtures) shall meet the requirements of GB
16838.
6.17 Collision test
6.17.1 Test procedure
6.17.1.1 ARRANGE the sample according to the normal working conditions and turn
on the power supply to make it in the normal monitoring state.
6.17.1.2 APPLY 3 collisions of 0.5 J ± 0.04 J energy to each of the consumable parts
(such as indicator lights, displays, etc.) on the surface of the sample. Care shall be
taken during the test to ensure that the results of the previous group (3) of collisions
do not affect the results of subsequent collisions; in the opinion that it may have an
effect, defects found shall not be taken into account, take a new sample to carry out
the collision in the same position, observe and record the working state of the sample.
6.17.1.3 CARRY out the performance test according to the method of 6.2 and 6.3.
6.17.2 Test equipment
The test equipment shall meet the requirements of GB 16838.
6.18 Low temperature (running) test
6.18.1 Test procedure
6.18.1.1 PLACE the sample in the test chamber; make it in the normal monitoring state;
MAINTAIN for 30 min ± 5 min under normal atmospheric conditions; REDUCE the
temperature to -10 °C ± 3 °C at an average cooling rate of not more than 1 °C/min and
maintain for 16 h; OBSERVE and record the working state of the detector.
6.18.1.2 RAISE the temperature to 20 ° C ± 2 ° C at an average heating rate of not
more than 1 °C/min; TAKE the sample out of the test chamber and place it under
normal atmospheric conditions for 2 h; OBSERVE and record the appearance of the
sample.
6.18.1.3 CARRY out the performance test according to the requirements of 6.2 and
6.3.
6.18.2 Test equipment
The test equipment shall meet the requirements of GB 16838.
6.19 Constant heat and humid (running) test
6.19.1 Test procedure
6.19.1.1 PLACE the sample in the test chamber; make it in the normal monitoring state;
MAINTAIN for 30 min ± 5 min under normal atmospheric conditions. RAISE the
temperature to 40 °C ± 2 °C at an average heating rate of not more than 1 °C/min;
ADJUST the relative humidity to 93 % ± 3 %; MAINTAIN for 4 d; OBSERVE and record
the working state of the sample.
6.19.1.2 RAISE the temperature to 20 ° C ± 2 ° C at an average heating rate of not
more than 1 °C/min; TAKE the sample out of the test chamber and place it under
normal atmospheric conditions for 2 h; OBSERVE and record the appearance of the
sample.
6.19.1.3 CARRY out the performance test according to the requirements of 6.2 and
6.3.
6.19.2 Test equipment
The test equipment shall meet the requirements of GB 16838.
7 Inspection rules
7.1 Factory-exit inspection
The factory-exit inspection items are:
a) basic performance test;
b) monitoring alarm function test (for independent detectors);
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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