Uninterruptible Power Supply (UPS) Part 2: Electromagnetic Compatibility (EMC) Requirements
Appendix B
(Data status)
Electromagnetic emission limits for magnetic fields (H fields) (option, proposed by the buyer)
Table B.1UPS rated output current ≤25A
Frequency range MHz
About peak limit DB (μA / m)
Class A UPS
B-class UPS
0.01 ~ 0.15
52.0 ~ 28.51)
40.0 ~ 16.51)
0.15 ~ 1.0
28.5 ~ 12.0
16.5 ~ 0
1.0 ~ 30
12.0 ~ 1.5
0 ~ -10.5 1) Frequency is not mandatory below 150kHz
Note: In all frequency range, the logarithmic linearity of the limit
Table B.2UPS rated output current. 1882.25A
Frequency range MHz
About peak limit DB (μA / m)
Class A UPS
B-class UPS
0.01 ~ 0.15
64.0 ~ 40.51)
52.0 ~ 28.51)
0.15 ~ 1.0
40.5 ~ 24.0
28.5 ~ 12.0
1.0 ~ 30
24.0 ~ 13.5
12.0 ~ 1.5 1) The frequency is 150 kHz or less is non-mandatory.
Note: In all frequency range, the logarithmic linearity of the limit
Note: The rated current is greater than 100A's UPS limit to be determined
Appendix C
(Data status)
The limit value of the signal port electromagnetic transmission is only available when the cable length exceeds 10m.
Port
Frequency range / MHz
Limit
Basic standard
Signal, control
0.15 ~ 0.5
40-30dB (μA) 1) quasi-peak 30-20 dB (μA) 1) average
GB9254B
Signal, control
0.5 ~ 30
30dB (μA) 1) quasi-peak 20dB (μA) 1) average
GB9254B 1) Limit value varies with frequencies
Appendix D
(Normative appendix)
Electromagnetic immunity test method
D.1 Overview
The purpose of these tests is to measure the immunity level of the electromagnetic harassment of the UPS system.
Depending on the physical dimensions and power rated values of the UPS, the manufacturer can choose the most suitable test site and test arrangement for the actual UPS.
D.1.1 Test Environment
The immunity test is preferably carried out in the laboratory environment, and all tests should be carried out on the ground plane, the ground plane is minimized to 1 m × 1 m, each side extends, at least 0.5m.
Federal UPS should be placed on a dry wooden frame of high 0.LM.
The desktop UPS should be placed on a 0.8m high wooden table.
The following test equipment refers to the UPS.
D.2 Electrostatic Discharge (ESD)
Electrostatic discharge (ESD) immunity test is carried out in accordance with GB / T17626.2 Test Level 3. The ESD trial is only applied only to the point or surface of the UPS that may be hit from the normal use of the equipment, and 0.5m × 0.5m level and vertical coupling plate.
The test generator specified in GB / T17626.2 should be used, and the discharge is accomplished by 150 pF accommodating capacitors and 330 Ω discharge resistance, and its rise time is less than 1 ns.
Discharge the UPS selected measurement point and vertical coupling plate, each polar for at least 10 times.
D.3 Radial electromagnetic (EM) field antity
D.3.1 The immunity test of radiation electromagnetic field should be carried out in accordance with GB / T17626.3 Test Level 2. The UPS should be placed in the frequency range of 80MHz to 1000MHz, the field is 3V / m, and the modification is 80% in an electromagnetic field modulated with 1 kHz (sine wave).
Test equipment, test facilities, calibration, test arrangement and method according to the corresponding terms of GB / T17626.3.
D.3.2 The wiring scheme shall be required in Section 7.3 of GB / T17626.3.
D.4 Electric Express Transient Pulse Group Immunity
D.4.1 The immunity test should be performed on all cables connected to the UPS connection. If the manufacturing plant indicates that its length is less than 3m.
D.4.2 The device should be performed according to the GB / T17626.4 Test Level 2, the test generator terminal open circuit: the power supply is 1kV; the input / output line, the data and the control line are 0.5kV.
Figure D.1 amplitude imbalance
Figure D.2 phase imbalance
Pulse rise time 5 ns, attenuation time 50 ns, pulse repetition frequency 5 kHz, pulse group cycle 300ms, pulse group duration 15ms, each cable test total persistence at least 1 min.
If the UPS has a protective ground terminal (PE), a short line should be used to connect it to the ground plane. If the protection ground is in the power cable, the "far" of the protective ground wire should be connected to the ground plane, and additionally ground is not allowed.
D.4.3 Coupling Method, follow GB / T17626.4 Section 6.3, accommodating a capacitive coupling clip on any input or output cable, and the UPS should be no more than LM.
Each wire on the power input side, including the grounding wire, which should be tested separately. Other cables, such as multi-core cables, shielded cables can be used as a cable as a whole in a capacitive coupling ters.
D.5 Surge (impact) immunity
Test was carried out in accordance with GB / T17626.5 Test Level 3.
An unidirectional pulse of the open circuit voltage is 2 kV from the test generator, the rise / fall time is 1.2 / 50 μs, and the two poles are applied between all power input terminals and the grounds.
GB / T17626.5 Recommended 20MH inductor on each input power line, only applicable to UPS below 500 W, not applicable to high-power UPS.
Therefore, single-phase and three-phase UPS should be set in the GB / T17626.5 of Figure 13 with input power isolation transformers.
Surge signal generator internal resistance:
- The test between the power cord and the ground should be 12Ω;
- The test between the signal line and the ground should be 42Ω.
When the line test is required, the test voltage is 1 kV, and the source impedance is 2Ω.
D.6 low frequency signal antity
D.6.1 Power harmonics and intermodulators
The UPS run should be able to withstand the low frequency transmitted harassment as specified in IEC61000? 2? 2 when the power input is run. Compatibility can be tested by simulation of the following conditions, UPS should be able to run continuously and the specified performance is not lowered.
D.6.1.1 Single Phase UPS
Tests were carried out in accordance with GB / T17626.1 Interference Test Test Terminal A.1.1.4b. As the minimum requirement, the test should be tested at a single sine wave harassment voltage of 10V, and the frequency of test is slowly increased from 140 Hz to 360 Hz.
D.6.1.2 Three-phase UPS
The test arrangement and test voltage sizes per phase should be the same as the single-phase device arrangement. The difference is that the three-phase variable frequency generator (stationary or rotary), the frequency of the test slowly increased from 140 Hz to 360 Hz.
Two phase sequences of three-phase distrassment signal should be used.
If the UPS has a neutral terminal, it should be connected and trial like a single-phase device trial, and the test is only carried out at close to the three times power source.
D.6.2 Power supply imbalance (only three-phase UPS system)
The three-phase system should perform an amplitude imbalance and phase imbalance test in the power input.
The unbalanced signal is generated using a single-phase transformer. When the amplitude is imbalance test, the transformer varies from 230V / 5V, and is connected as shown in Figure D.1. The transformer should be tested in both the connection and reverse connection shown in Figure D.1.
The phase imbalance test uses a transformer than 400V / 5V, and is connected according to the next method of Figure D.2. The test should be tested in both the transformer to be connected in two cases shown in Figure D.2.
The imbalance test is only performed in one phase of the power supply.
D.6.3 Voltage Temporarion Resistance
The test is made in GB / T17626.11, only short-term interrupt tests.
D.6.3.1 Single phase UPS
As a minimum requirement, the case where 0.5 cycle 100% voltage is temporarily degraded and 10 cycles 100% voltage is temporarily degraded.
D.6.3.2 Three-phase UPS
Each phase was subjected to a test of a 100% voltage of 0.5 cycles, respectively. 10 cycle 100% voltage is temporarily lowered as all of the grid failures of all phases. (Continued), technology area
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