Definitions of Strong Current and Weak Current
强电与弱电的定义
“Strong current” and “weak current” are relative concepts. The primary distinction lies in their applications rather than purely in voltage levels (if we must define by voltage, we might say that voltages above 36V—the safe voltage level for humans—are considered strong current, and those below are considered weak current). While they are interconnected, they are distinguished as follows:
Strong current deals with energy (electric power), characterized by high voltage, high current, high power, and low frequency. The main focus is on reducing losses and improving efficiency.
Weak current primarily deals with information transmission and control, characterized by low voltage, low current, low power, and high frequency. The primary concern is the effectiveness of information transmission, such as fidelity, speed, range, and reliability.
“强电”与“弱电”是相对概念，二者的核心区别主要在于应用领域而非单纯电压高低（若需以电压界定，通常将高于36V——人体安全电压——归为强电，低于该值则视为弱电）。虽然两者存在内在联系，但可通过以下特征进行区分：
强电主要涉及电能领域，具有高电压、大电流、高功率、低频率的特点，其核心关注点在于降低功率损耗、提升传输效率。
弱电则侧重于信息传递与控制领域，表现为低电压、小电流、低功率、高频率的特征，其核心诉求在于信息传输质量，包括保真度、传输速率、覆盖范围及可靠性等指标。
Here are some specific differences：
具体差异体现在：
Frequency: Strong current typically operates at a frequency of 50Hz, known as the “power frequency,” while weak current often involves high or very high frequencies, measured in KHz (kilohertz) or MHz (megahertz).
频率特性：强电通常采用50Hz工频，而弱电常涉及千赫兹或兆赫兹级别的高频乃至甚高频。
Transmission Method: Strong current is transmitted via power lines, while weak current can be transmitted via wired or wireless methods, with wireless transmission relying on electromagnetic waves.
传输方式：强电通过电力线路传输，弱电则可选择有线或无线传输模式，其中无线传输依托电磁波实现。
While strong current includes high and medium-frequency equipment, it operates at higher voltages and currents. However, with advancements in modern technology, weak current has increasingly influenced the strong current field (e.g., power electronics, wireless remote control). Despite this, these are still distinct categories within strong current, focusing on different aspects of electrical systems.
尽管强电系统也包含中高频设备，但其工作电压与电流始终维持较高水平。值得注意的是，随着现代科技发展，弱电技术已持续渗透至强电领域（如电力电子技术、无线遥控应用等）。即便如此，在强电体系内仍存在明确的技术门类划分，各自聚焦于电力系统的不同维度。
