Record abnormal waveforms
Record voltage fluctuations
Observe power supply waveforms
Measure harmonics
Measure flicker
Measure power
One instrument does it all!
How does the PQ3198 record abnormal waveforms?
The instrument automatically judges and records a range of problems.
Transient voltages
Transient voltages are caused by lightning strikes, circuit-breaker and relay
contact obstructions and tripping, and other phenomena. They are often char-
acterized by precipitous voltage variations and a high peak voltage.
Flicker (ΔV10, IEC)
Flicker is caused by blast furnace, arc welding, and thyristor control loads. The
resulting voltage fluctuations cause flicker in light bulbs and similar phenom-
ena.
Voltage dips (falling voltage)
Short-lived voltage drops are caused by the occurrence of a inrush current with
a large load, such as when a motor starts.
Interruptions
In an interruption, the supply of power stops momentarily or for a short or long
period of time due to factors such as a circuit breaker tripping as a result of a
power company accident or power supply short-circuit.
Voltage swells (rising voltage)
In a voltage swell, the voltage rises momentarily due to a lightning strike or the
switching of a high-load power line.
Harmonic and high-order harmonic elements
Harmonics are caused by distortions in the voltage and current caused by the
semiconductor control devices that are frequently used in equipment power
supplies.
Transient voltages
Voltage dips
Voltage swells
Interruptions
Harmonic
Flicker
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