Enhanced Introduction to Schneider Electric Easergy P5F30 Numeric Relays

The Schneider Electric Easergy P5F30 Numeric Relay is an advanced, multi-functional protection device engineered to optimize the reliability and efficiency of electrical distribution networks across industrial installations and utility substations, regardless of voltage level (from low to high voltage systems).

Comprehensive Protection Suite: It integrates a full range of current-based protections (e.g., overcurrent, short-circuit, earth fault) and voltage-based protections (e.g., overvoltage, undervoltage, phase imbalance), ensuring robust defense against electrical anomalies.

Operational Efficiency Tools: Beyond protection, it provides real-time electrical measurements (current, voltage, power quality metrics), flexible control capabilities (remote switching, logic programming), and detailed recording/monitoring functions (event logs, waveform capture) to support proactive maintenance and system analysis.

Versatile System Compatibility: Designed for universal application, it seamlessly adapts to various neutral grounding configurations, including solidly grounded, impedance grounded, Petersen coil grounded, and isolated (ungrounded) systems—making it a versatile solution for diverse electrical network architectures.

This relay combines precision, adaptability, and user-friendly operation to meet the critical needs of modern power distribution systems.

Protection function:

Phase  overcurrent  50/51

Phase  overcurrent  50/51

Directional  phase  overcurrent  67

Earth  fault  overcurrent  50N/51N

Directional  earth  fault  67N

Transient  earth  fault  67NI

Neutral  admittance  21YN

Earth  fault  wattmetric  32N

Capacitor  bank  unbalance  51C

Broken  conductor  46  12/11

Current  unbalance  46  12/11

Cold  load  pick-up

Switch  ON  to  fault  (SOTF)

H2 detection

H5 detection

Breaker failure 50BF

Directional active underpower 37P

Fault locator 21FL

Recloser 79

Negative sequence overcurrent 46

Overvoltage 59

Undervoltage 27

Earth fault overvoltage 59N

Underfrequency 81/81N

Rate of change of frequency 81R

Synchro-check 25

Lockout relay 86

CT supervision 60

VT supervision 60

Programmable stages 99

Programmable logic

Programmable curve