如何计算Harmonic Distortion
learn.whatIsHeading
Harmonic Distortion Calculator helps contractors and tradespeople accurately size, spec, and estimate materials and systems.
公式
THD = √(V₂² + V₃² + ...) / V₁ × 100
分步指南
- 1Measure fundamental and harmonic voltages with power quality meter
- 2Apply the formula using your project measurements
- 3Add required safety factors or waste allowances per code
例题解析
输入
V1=120V, V3=6V, V5=4V
结果
THD = √(36+16)/120 × 100 = 6.0%
常见错误注意事项
- ✕Not applying code-required safety factors or derating
- ✕Forgetting to account for waste and cut losses in material estimates
准备好计算了吗？尝试免费的 Harmonic Distortion 计算器
自己尝试一下 →