They are designed purely for the purpose of protection against current faults such as over current, short circuits, earth faults and earth leakages. Equipped with digital display, important information such as setting and operation parameters, real-time faults, tripping histories and indication of previous tripped elapsed time are easily available for a more precise fault analysis. Multiple firmware algorithms (notably SPARC¹, DCOI² and Fundamental Signal Detection³) have been integrated into these devices which makes them extremely responsive yet precise while maintaining high immunity against EMI and nuisance tripping. DP series of protection relay truly belongs to the next generation that will lead the expectation of future protection devices.
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