GB 16796-2022Security alarm equipment - Safety requirements and test methods (English PDF)

5.1.1 Steady-state voltage or steady-state touch current limits

5.5 Lightning protection Equipment intended to use coaxial cables to transmit data between different buildings or between outdoor antennas and buildings shall be able to meet the electrical strength requirements of

5.2.2 after undergoing the pulse test (without damp and hot pretreatment); the above-mentioned equipment with antenna terminals shall also undergo a voltage impact test, after which it shall be able to meet the electrical strength requirements of 5.2.2 (without damp and hot pretreatment).

5.6 Battery For equipment equipped with batteries, the batteries shall comply with the requirements of

7.6 in GB 4943.1-2022.

11.1 Marking

11.1.1 Marking contents The equipment shall be marked with at least the following.

a) Manufacturer's name, responsible supplier's name or registered trademark.

b) Model and name of the equipment.

c) Nature (AC, DC or both AC and DC) and polarity of the power source. For AC, the symbol ~ numbered 5032 in GB/T 5465.1-2009 shall be used, and for DC, the symbol numbered 5031 in GB/T 5465.1-2009 shall be used.

d) Rated value or rated voltage range of the supply voltage. For equipment powered by AC mains power grid, the rated voltage or rated voltage range shall be marked as 220 V or 380 V (applicable to three-phase equipment) or include the above values, and be set to 220 V or 380 V at the factory; if the equipment has multiple power connections and the connections have different rated voltages, each connection shall be marked with the rated voltage.

e) AC rated frequency or rated frequency range. Equipment powered by AC mains power grid shall be marked as

50 Hz or including

f) Rated current or rated power. If the equipment is provided with a grid power output socket, the rated current or power marked shall include the current or power allocated to the output socket; if the equipment has multiple power connections, each connection shall be marked with a rated current or power.

g) Rated current value, voltage value, fusing characteristics and model of the fuse (fuse wire/tube). If the fuse is replaceable, it shall be marked near the fuse holder.

h) Protection category of the equipment against electric shock. The marking of protection category against electric shock for Class I equipment and Class II equipment shall meet the following requirements respectively: -- Class I equipment: The characteristics of the power supply used during the test (such as power supply impedance, output voltage waveform) shall not have a significant impact on the test results. For AC-DC dual-use products, the two power supplies must be supplied separately.

12.1.3 Test sequence The tests shall be carried out in the following order.

a) Tests carried out when the equipment is not powered on.

b) Tests carried out when the equipment is powered on, the test sequence is: 1) Tests under normal operation conditions; 2) Tests under abnormal operating conditions; 3) Tests under single fault conditions; 4) Other tests that may cause destructive effects.

12.1.4 normal operation conditions Unless otherwise specified, the tests shall be conducted under the most unfavorable conditions of the following factors.

12.2.1 Test of requirements for accessible parts

12.2.1.1 Steady-state voltage or steady-state touch current test The steady-state voltage or steady-state touch current test shall be carried out according to the following method.

a) Use the articulated test fixture specified in Figure A.1 in Appendix A to determine the accessible parts of the equipment. When there is an opening in the equipment that prevents the articulated test fixture from contacting the component, the non- articulated test fixture in Figure A.2 in Appendix A shall be used to apply a force of 30 N for testing. If a non-articulated test fixture can enter the opening, the articulated test fixture shall be used again to apply a force of less than 30 N to determine the accessible part of the equipment. Use the blunt test fixture specified in Figure A.3 in Appendix A to determine the accessible parts of the equipment plug, jack, and connector. (Accessible parts of the equipment include parts behind doors, panels, removable covers, etc. that can be opened without tools, and exclude floor-standing equipment with a mass exceeding 40 kg that becomes accessible only when tilted).

b) The supply voltage is

1.1 times the rated voltage of the equipment.

c) Put the equipment in normal operation conditions, abnormal operating conditions and single fault conditions respectively, use an oscilloscope (or a voltmeter with an observable waveform) with an internal resistance not less than 50 kOmega, and test the steady-state voltage of each accessible part (If the equipment or parts of the equipment need to be earthed during use, they shall be earthed before testing).

d) Put the equipment in normal operation conditions, abnormal operating conditions and single fault conditions respectively (the single fault test of Class I equipment shall include the disconnection of the protective earthing conductor). The human body impedance measurement network used for Class I equipment and Class II equipment under single fault conditions shall comply with the requirements of Figure 2a); the human body impedance measurement network used for Class II equipment under other conditions shall comply with the requirements of Figure 2b). Test between the accessible parts of the equipment and between the accessible part and any pole of the power supply. The test circuit is shown in Figure 3 or Figure 4. For single-phase equipment, the L-N polarity is changed for a total of 2 tests; for three-phase equipment, the L1/L2/L3 polarity is changed for a total of 6 tests.

e) For accessible non-conductive parts of the equipment, cover the parts with metal foil (the area of the metal foil is approximately 100 mm × 200 mm) for testing.

f) Determine whether the inspection results meet the requirements of 5.1.1. If the equipment is provided with a power switch, test with the power switch on and off.

12.2.2 Insulation test

12.2.2.1 Clearance and creepage distance tests Carry out the test according to the requirements of

5.4.3 in GB 4943.1-2022, and determine whether the test results meet the requirements of 5.2.1.

12.2.2.2 Electric strength test The electric strength test is carried out according to the following method.

a) Carry out the damp heat test when the equipment is not powered on. The test temperature is (40±2) °C and the relative humidity is (93±3) %. For equipment used in tropical climate conditions, the test time is 120 h; for equipment used in non-tropical climate conditions, the test time is 48 h.

b) After the damp heat test, determine the type of insulation between the equipment's power plug or power input/output terminal and the accessible part of the enclosure; then, with the equipment's power switch turned on, apply the test voltage specified in Table 2 between the power plug or power input/output terminal of the equipment and the accessible part of the equipment enclosure (different values of voltage are applied according to the rated voltage and insulation type of the equipment). Determine whether the inspection results meet the requirements of 5.2.2. If the equipment enclosure is free of exposed metal parts, cover the surface of the enclosure with metal foil (the metal foil area is 100 mm × 200 mm) for testing. For equipment in which reinforced insulation and lower-level insulation are used together, care shall be taken that the voltage applied to the reinforced insulation shall not cause the basic insulation or supplementary insulation to withstand voltage stresses exceeding the specified voltage stress.

12.2.2.3 Insulation resistance test The insulation resistance test is carried out according to the following method.

a) Carry out the damp heat test when the equipment is not powered on. The test temperature is (40±2) °C and the relative humidity is (93±3) %. For equipment used in tropical climate conditions, the test time is 120 h; for equipment used in non-tropical climate conditions, the test time is 48 h.

b) After the damp heat test, determine the type of insulation between the equipment power plug or power input/output terminal (if the output terminal is hazardous voltage) and the accessible part of the enclosure. When the power switch of the equipment is turned on, apply a 500 V DC voltage between the equipment power plug or power input/output terminal (if the output terminal is dangerous voltage) and the accessible part of the equipment enclosure. The test time is 60 s. Test the insulation resistance and judge whether the inspection result meets the requirements of 5.2.3. If the equipment enclosure is free of exposed metal parts, cover the surface of the enclosure with metal foil (the metal foil area is 100 mm × 200 mm) for testing.

12.2.3 Protective conductor test

12.2.3.1 Test of basic requirements Make a visual inspection to determine whether the results meet the requirements of 5.3.1.

12.2.3.2 Protective earthing conductor size test Use a standard measuring tool to test the diameter of the protective earthing conductor and calculate the cross-sectional area to determine whether the inspection results meet the requirements of 5.3.2.

12.2.3.3 Earthing continuity test Apply a 25 A DC or an effective 25 A AC current between the protective earthing terminal of the equipment and the farthest component or terminal within the equipment that requires protective earthing, and test the voltage at both ends to determine the resistance value. The test time is 1 minute. For equipment with a detachable power cord, the resistance value of the protective earthing conductor of the power cord shall not be included in the test. Determine whether the inspection results meet the requirements of 5.3.3.

12.2.4 Fuse Check the fuse parameters and manually disconnect the fuse for testing to determine whether the test results meet the requirements of 5.4.

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