The Warm-Damp Environmental Conditions and Technical Requirements for Power Grid State Monitoring Devices drafted by ORT was authoritatively released by the National Energy Administration
The name of the standard:
Warm-Damp Environmental Conditions and Technical Requirements for Power Grid State Monitoring Devices
Standard No.:
NB/T 10280-2019(中华人民共和国能源行业标准)
NB/T 10280-2019 (Energy Industry Standards of the People's Republic of China)
This standard was released on November 4, 2019, and implemented on May 1, 2020.
The range of standards:
This standard specifies the technical requirements, reliability test methods, signs, packaging, and storage of the state monitoring device for power grids when used under humid and hot environmental conditions.
This standard is applicable to the state monitoring devices for power grids used in areas with two types of damp heat and sub-humid heat specified in GB/T 4797.1-2018.
Test Requirement:
Climate zone | Place of use | Severity level | Experimental procedure |
Damp heat | No weather protection place | -5℃; Duration: 16h | Carry out according to test Ad, put the test sample into the test chamber at room temp., and then adjust the temp. to -5℃±2℃. After the test sample reaches a stable temp. under this condition, it is energized and operated under actual working conditions to verify its ability to start the machine at low temp. and continue to be exposed under this condition for 16h. |
Weather protection place | |||
Sub-humid heat | No weather protection place | -10℃; Duration: 16h | Carry out according to test Ad, put the test sample into the test chamber at room temp., and then adjust the temp. to -10℃±2℃. After the test sample reaches a stable temp. under this condition, it is energized and operated under actual working conditions to verify its ability to start the machine at low temp. and continue to be exposed under this condition for 16h. |
Weather protection place | -5℃; Duration: 16h | Carry out according to test Ad, put the test sample into the test chamber at room temp., and then adjust the temp. to -5℃±2℃. After the test sample reaches a stable temp. under this condition, it is energized and operated under actual working conditions to verify its ability to start the machine at low temp. and continue to be exposed under this condition for 16h |
Place of use | Severity level | Experimental procedure |
No weather protection place | 55℃; Duration: 16h | Carry out according to test Bd, put the test sample into a test chamber at room temp., and then adjust the temp. to 55℃±2℃. After the test sample reaches a stable temp. under this condition, it is energized and operated under actual working conditions to verify its ability to start the machine at a high temp. and continue to be exposed under this condition for 16h. |
Weather protection place | 45℃; Duration: 16h | Carry out according to test Bd, put the test sample into the test chamber at room temp., and then adjust the temp. to 45℃±2℃. After the test sample reaches a stable temp. under this condition, it is energized and operated under actual working conditions to verify its ability to start the machine at a high temp. and continue to be exposed under this condition for 16h. |
3. temp. Change Test
Climate zone | Place of use | Severity level | Experimental procedure |
No weather protection place | Low temp.: -5℃; High temp.: 55℃; Temp. Change rate: 1 K/min; Duration: 3h; Number of cycles: 2 | According to test Nb, the air temp. in the test, the chamber is reduced to -5℃±2℃ at a rate of 1±0,2Kmin. After the temp. in the chamber reaches a stable temp., the test sample is exposed to this temp. for 3h. Then the air temp. in the test, the chamber is increased to 55℃±2℃ at a rate of 1±0.2K/min. After the temp. in the chamber reaches a stable level, the test sample is exposed to this temp. for 3h. Then reduce the air temp. in the test chamber to 25℃±2℃ at a rate of 1±0.2K/min. Perform 2 cycles of the above test. | |
Weather protection place | Low temp.: -5°C; High temp.: 45℃; Temp. change rate: 1 K/min Duration: 3h; Number of cycles: 2 | According to test Nb, the air temp. in the test, the chamber is reduced to -5℃±2℃ at a rate of 1±0.2 K/min. After the temp. in the chamber is stable, the test sample is exposed to this temp. for 3 hours. Then the air temp. in the test, the chamber is increased to 45℃±2℃ at a rate of 1±0.2K/min. After the temp. in the chamber reaches a stable level, the test sample is exposed to this temp. for 3h. Then reduce the air temp. in the test chamber to 25℃ ± 2℃ at a rate of 1±0.2K/min. Perform 2 cycles of the above test. | |
No weather Sub-humid heat protection place | Low temp.: -10℃; High temp.: 55℃; temp. change rate: 1 K/min Duration: 3h; Number of cycles: 2 | According to test Nb, the air temp. in the test, the chamber is reduced to -10℃±2℃ at a rate of 1±0.2K/min. After the temp. in the chamber reaches a stable level, the test sample is exposed to this temp. for 3h. Then the air temp. in the test, the chamber is increased to 55℃±2℃ at a rate of 1±0.2K/min. After the temp. in the chamber reaches a stable level, the test sample is exposed to this temp. for 3h. Then reduce the air temp. in the test chamber to 25℃±2℃ at a rate of 1 ± 0.2K/min. Perform 2 cycles of the above test. | |
Weather protection place | Low temp.: -5°C; High temp.: 45℃; temp. change rate: 1 K/min Duration: 3h; Number of cycles: 2 | According to test Nb, the air temp. in the test, the chamber is reduced to -5℃±2℃ at a rate of 1±0.2 K/min. After the temp. in the chamber is stable, the test sample is exposed to this temp. for 3h. Then the air temp. in the test, the chamber is increased to 45℃±2℃ at a rate of 1±0.2 K/min. After the temp. in the chamber reaches a stable level, the product test sample is exposed to this temp. for 3h. Then reduce the air temp. in the test chamber to 25℃±2℃ at a rate of 1±0.2 K/min. Perform 2 cycles of the above test. |
5. Constant Damp heat steady state test
Severity level | Experimental procedure |
temp.: 40℃±2℃; Relative humidity: (93±3)%; Test time: 96h | Put the test sample into the effective space of the test chamber, preheat it first, and raise the temp. to 40℃±2℃ without humidification. When the temp. of the test sample reaches a stable level, adjust the relative humidity too (93±3)% in the chamber to within 2h; keep for 96h at a temp. of 40℃±2℃ and relative humidity of (93±3)%, then reduce the relative humidity to 73%~77% within 05h, and then adjust the temp. to room temp. within 0.5h. |
6.1 Salt mist Test
Bottom metal material | Protection layer category | Eligibility requirements | Duration |
Carbon steel | Zn | No white or gray-black, brown corrosion appear | 48h |
alloy steel | Zinc chromium coating | No white or gray-black, brown corrosion appear | 96h |
Copper and copper alloys | Nichrome | No off-white or green corrosion appear | 96h |
Ni | No off-white or green corrosion appear | 48h | |
Ti | No off-white or green corrosion appear | ||
Ag | No off-white or green corrosion appear | 24h | |
Aluminum and aluminum alloy | Anodizing | No off-white corrosion appear | 48h |
6.2 Alternating Salt mist Test
Severity level | Experimental procedure |
According to GB/T 2423.18—2012 severity level (2) | Before the test, check the insulation resistance of the product and perform a functional test according to the regulations. The test sample is put into the salt mist chamber according to the state of use, and it is misted continuously for 2h under the temp. condition of 15℃~35℃. At the end of the misting process, put the equipment under test into a humid chamber with a temp. of 40℃±2℃ and relative humidity of (93±3)% according to the state of use for 20h-22h. Perform 3 cycles of the above test. |
Severity level | Experimental procedure |
According to GB/T 2423.16-2008 test method 1, 28d | Select the parts of the equipment as test samples. After the test, the visual inspection shall be carried out immediately according to the requirements of relevant specifications |
8. Vibration Test
a) Test purpose: to assess the adaptability of the test sample to the vibration environment during operation.
b) According to the standard: according to the regulations in GB/T 11287.
c) Test process and performance requirements: Carry out a vibration endurance test of severity level 1 on the monitoring device. After the test, the device should not have loose fasteners or mechanical damage. Other performance requirements are the same as 5.1.
9. Shock Test
a) Test purpose: to assess the adaptability of the test sample to the impact environment during operation.
b) According to the standard: according to the regulations in GB/T 14537.
c) Test process and performance requirements: Carry out a severity level 1 impact durability shock and vibration testing on the monitoring device. After the test, the device should not have loose fasteners or mechanical damage. Other performance requirements are the same as 5.1.
10. Crash test service
a) Crash test service purpose: to assess the adaptability of the test sample to the collision environment during operation.
b) According to the standard: according to the regulations in GB/T 14537.
c) Test process and performance requirements: Carry out a severity level 1 crash test on the monitoring device. After the test, the device should not have loose fasteners or mechanical damage. Other performance requirements are the same as 5.1.
11. Electromagnetic compatibility test
Application parts | Test process and performance requirements |
Shell | Electrostatic discharge immunity test The electrostatic discharge immunity test is carried out according to the method specified in GB/T 17626.2, and the severity level is 4. In the case of interference, the device should function or perform normally within the technical limit during the test period and after the test; if the function or performance is temporarily reduced or lost, it should be able to recover by itself. Radiofrequency electromagnetic field radiation immunity test The radiofrequency electromagnetic field immunity test is carried out according to the method specified in GB/T 17626.3, and the severity level is 3. In the case of interference, the device shall function or perform normally within the limits of the technical requirements during and after the test. Power frequency magnetic field immunity test The power frequency magnetic field immunity test is carried out according to the method specified in GB/T 17626.8, and the severity level is 5. In the case of interference, the device shall function or perform normally within the limits of the technical requirements during and after the test. Pulse magnetic field immunity test The pulsed magnetic field immunity test is carried out according to the method specified in GB/T 176269, and the severity level is 5. In the case of interference, the device shall function or perform normally within the limits of the technical requirements during and after the test. Damped oscillating magnetic field immunity test The damped oscillation magnetic field immunity test is carried out according to the method specified in GB/T 17626.10, and the severity level is 5. In the case of interference, the device shall function or perform normally within the limits of the technical requirements during and after the test. |
AC power supply | a) Voltage sag immunity test. The voltage sag immunity test is carried out according to the method specified in GB/T 17626.11, and the severity level is 3. In the case of interference, the device should function or perform normally within the technical limitations during and after the test; if the function or performance is temporarily reduced or lost, it should be able to recover by itself. b) Electrical fast transient pulse group immunity test The electrical fast transient pulse group immunity test is carried out in accordance with the method specified in GB/T 17626.4, and the severity level is 4. In the case of interference, the device should function or perform normally within the technical limitations during and after the test; if the function or performance is temporarily reduced or lost, it should be able to recover by itself. c) Surge (impact) immunity test. The surge (impact) immunity test is carried out according to the method specified in GB/T 17626.5, and the severity level is 4. In the case of interference, the device should function or perform normally within the technical limitations during and after the test; if the function or performance is temporarily reduced or lost, it should be able to recover by itself. d) Conducted disturbance immunity test induced by radiofrequency field The conducted disturbance immunity test induced by the radiofrequency field is carried out according to the method specified in GB/T 17626.6, and the severity level is 3. In the case of interference, the device shall function or perform normally within the limits of the technical requirements during and after the test |
DC power supply | a) Electrical fast transient pulse group immunity test. The electrical fast transient pulse group immunity test is carried out in accordance with the method specified in GB/T 17626.4, and the severity level is 4. In the case of interference, the device should function or perform normally within the technical limitations during and after the test; if the function or performance is temporarily reduced or lost, it should be able to recover by itself. b) Surge (impact) immunity test. The surge (impact) immunity test is carried out according to the method specified in GB/T 17626.5, and the severity level is 4. In the case of interference, the device should function or perform normally within the technical limitations during and after the test; if the function or performance is temporarily reduced or lost, it should be able to recover by itself. c) Conducted disturbance immunity test induced by radiofrequency field. The conducted disturbance immunity test induced by the radiofrequency field is carried out according to the method specified in GB/T 17626.6, and the severity level is 3. In the case of interference, the device shall function or perform normally within the limits of the technical requirements during and after the test. |
I/O signal/control (including the connection line of the functional ground port) | Immunity Test of Electrical Fast Transient Pulse Group The electrical fast transient pulse group immunity test is carried out in accordance with the method specified in GB/T 17626.4, and the severity level is 4. In the case of interference, the device should function or perform normally within the technical limitations during and after the test: if the function or performance is temporarily reduced or lost, it should be able to recover by itself. b) Conducted disturbance immunity test induced by radiofrequency field. The conducted disturbance immunity test induced by the radiofrequency field is carried out according to the method specified in GB/T 17626.6, and the severity level is 3. In the case of interference, the device shall function or perform normally within the limits of the technical requirements during and after the test |
12. Shell Protection Test
Place of use | Protection degree IP |
Indoor | IP31 |
Outdoor | IP54 |
13. Solar Radiation Test
Severity level | Experimental procedure |
Temperature: 55℃±2℃; Cycle times: 2 times (48h) | Carry out according to procedure B, and cycle twice as shown in Figure 2 (the temperature in the test chamber is raised or lowered at a rate of less than 1K/min), where the irradiance is 1120W/m² (300mm~3000mm), and the radiation should meet the spectral distribution requirements in GB/T 2423.24-2013, t1=25℃, t2=55℃. |
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