There is a significant difference between w and va in power notation. First, va, or apparent power, is the product of voltage (v) and current (a), which measures the total power capacity in the circuit, not just the actual power consumed, in units. Va is the apparent power, w is the actual power~! w<va, generally the w value is 60% to 70% of the corresponding "va" value. 1. For small capacities, we are more familiar with the concept of watts (w), so small capacities generally use "w" to represent capacity. 2. For more than 1 kilowatt hour, use "va". Va: volt-ampere, unit of voltage (volt, v) * current (ampere, a), apparent power (capacity). w: Watt, voltage (volt, v) * current (ampere, a), unit of active power. Pure resistive circuit, power factor cosa=1, apparent power, etc.
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The unit of apparent power is va, the unit of active power is w, and the unit of reactive power is var. Please tell me their meanings and differences, thank you! The differences between the three are as follows: 1. Different concepts 1. Active power: that is, the power actually consumed by the load, the unit is watts (w) or thousands. W (watt) = va (volt-ampere) × cosφ (cosφ is the power factor) va (volt-ampere) = w (watt)/cosφ Extended information: Development history of watts: Watt is named after the British scientist James Watt, who made contributions to the development of steam engines. Smear phenomenon: left va, right ips Applicable scenarios: mid-to-high-end commercial LCD monitors, text office Recommended cost-effective va monitors: tn panel tn panel, full name twisted nematic (twisted nematic) panel, due to low production costs, tn has become.
