ION meter: 4-30 Volt Intrp Ph1-3 alarm

[Stuart_Cheng]

Hi All,

Wondering if this alarm is triggered when voltage is lost? (like the outage of power system)

Also wondering interruption seems to be a serious issue, but why the default priority is Low?

Thanks

[Charles_Murison · Accepted solution]

Hello @Stuart_Cheng ,

Voltage interruption is based on the 4-30 definition: 

• On polyphase systems, a voltage interruption begins when the Urms voltages of all channels fall below the voltage interruption threshold, and ends when the Urms voltage on any one channel is equal to, or greater than, the voltage interruption threshold plus the hysteresis.
• Typical threshold: 10% of Udin. Typical Hysteresis: 2% of Udin

The alarm comes from the Disturbance Analyzer Module (DAN)

The alarm level is something that can be customized. If customer wants this to be high, the priority can be changed.

Regards,

Charles

[Stuart_Cheng]

Clear, thanks for your information @Charles_Murison.