Transient Overvoltage (Хиоки)

Намештаљка

Instrument location : Factory, 3-фаза 3-жични, 200V circuit

Проблем

A transient overvoltage was detected in all events occurring several times during the measurement. Нажалост, the cause of the transient could not be determined.

Analysis of transient waveform

  1. Occurred on all 3 phases (R-S, S-T, T-R) simultaneously
  2. Occurred twice in 1 cycle of the commercial waveform, and the interval between 2 events is 820μs
  3. The level is between 120V to 260V peak-to-peak
  4. The frequency is between 10kHz and 30kHz

Transient Overvoltage 1

Transient Overvoltage 2

Transient Overvoltage 3
Приметити : A threshold set at 1/2 of the waveform peak value is effective for detecting transient overvoltage. На пример, set the threshold at 0.07kV for a 100Vrms circuit, and 0.14kV for a 200Vrms circuit.

Извор : Водич за мерење квалитета напајања, Хиоки Е.Е. Корпорација