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电磁兼容性是指电气设备在电网中正常工作时，不会对周围环境和其他设备产生电磁干扰，同时也不会受到周围环境和其他设备的电磁干扰。电气设备在工作时会产生谐波电流，这些谐波电流会对电网和其他设备产生干扰，影响电磁兼容性。因此，IEC 61000-3-2:2014标准规定了设备输入电流每相不超过16A的电气设备在50Hz或60Hz电源频率下的谐波电流限值，以保证设备在电网中的电磁兼容性。

IEC 61000-3-2:2014标准规定了电气设备在不同功率下的谐波电流限值，具体如下：

| 额定输入功率 | 谐波电流限值 |
| ------------ | ------------ |
| ≤ 75W | 无限制 |
| > 75W | 见标准表格 |

标准表格中列出了不同额定输入功率下的谐波电流限值，具体如下：

| 额定输入功率 | 谐波电流限值 |
| ------------ | ------------ |
| 75W ~ 600W | 见标准表格 |
| > 600W | 见标准表格 |

IEC 61000-3-2:2014标准要求设备输入电流的谐波含量不得超过规定的限值，以保证设备在电网中的电磁兼容性。为了满足这一要求，电气设备需要采取相应的措施，如使用滤波器、改进电路设计等。

相关标准：
- IEC 61000-3-3:2013 Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current ≤16 A per phase and not subject to conditional connection
- IEC 61000-4-7:2002 Electromagnetic compatibility (EMC) - Part 4-7: Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto
- IEC 61000-4-13:2002 Electromagnetic compatibility (EMC) - Part 4-13: Testing and measurement techniques - Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity tests
- IEC 61000-4-14:2004 Electromagnetic compatibility (EMC) - Part 4-14: Testing and measurement techniques - Voltage fluctuation immunity test for equipment with mains current more than 16 A per phase
- IEC 61000-4-28:2015 Electromagnetic compatibility (EMC) - Part 4-28: Testing and measurement techniques - Variation of power frequency, immunity test