36V (human safety voltage) above the classification for strong electricity, 36V (human safety voltage) below the classification for weak electricity.
(1) AC frequency is different
Strong power frequency is generally 50Hz (Hz), called "industrial frequency", meaning that the frequency of industrial electricity: the frequency of weak power is often a high frequency or ultra-high frequency, to KHz (kHz), MHz (MHz).
(2) the transmission method is different
Strong power transmission lines to transmission, weak power transmission of wired and wireless points. Radio is transmitted by electromagnetic waves.
(3) power, voltage and current size
Strong power to KW (kilowatts), MW (megawatts), the voltage to V (volts), KV (kilovolts), the current to A (amps), kA (kiloamps); weak power to W (watts), mW (milliwatts), the voltage to V (volts), mV (millivolts), current to mA (milliamps), uA (microamps). ), and thus its circuit can be composed of printed circuits or integrated circuits.
Expanded InformationStrong power refers to the electrical part of the field of electrical engineering. Characterized by high power, high current and low frequency, the main consideration is low loss and high efficiency. It is closely related to weak electricity, as opposed to "weak electricity".
Source: Baidu Encyclopedia