PowerLogic T300 - MV fault location?

[manuellison]

Hi @jean-luc_batard 

Is it possible to program calculation formula in T300 in order to locate ground faults?

Is this option offered?

Thank you in advance

Regards,

[LudovicL · Accepted solution]

Hi, 

Ground fault detection is part of Algorithm implemented for fault detection on MV network

Here attached the list of fault detection algorith implemented :

• Phase overcurrent fault detection (ANSI 50/51)
• Ground (earth) fault detection (ANSI 50N/51N)
• Broken conductor detection/Negative sequence overvoltage (ANSI 47)
• Directional phase overcurrent fault detection (ANSI 67)
• Directional ground (earth) fault detection (ANSI 67N)

Regards

Ludovic

[TomBerry]

Each T300 can tell you if it has seen a fault. The more T300s that are deployed, the more precise the identification of the faulty section. 

It is on the roadmap to record the values of fault phase currents, so that they can be used in formulas to get an estimate of the minimum distance from the T300 to the fault.

However this sort of calculation is only valid for a feeder that has very little distributed energy resources, and has a predictable line impedance (not affected by network switching).

[Rudolf_Simon]

Along with recording currents also voltage recording (if measured) should be considered, to enable (rough) impedance calulation, which better for fault location estimation compared to just current values.