Schneider PowerLogic P5M30 protection relays are a compact solution developed and designed for medium and large sized rotating machines,performing an essential role in many industrial processes and generation. It offers more than a conventional protection relay, with numerous additional functions suitable and crucial for a wide range of applications, which involve protection, monitoring, diagnosis,

fault analysis tools, and maintenance aids.

Protection function:

Phase  overcurrent  50/51

Directional  phase  overcurrent  67

Earth  fault  overcurrent  50N/51N

Restricted  earth  fault  64REF

Directional  earth  fault  67N

Transient  earth  fault  67NI

Neutral  admittance  21YN

Earth  fault  wattmetric  32N

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

Phase undercurrent 37

Excessive starting time, locked rotor 48/51LR

Motor restart inhibition 66

Negative sequence overcurrent 46

Overvoltage 59

Undervoltage 27

Positive sequence undervoltage 27P

Earth fault overvoltage 59N

Underfrequency 81/81N

Lockout relay 86

CT supervision 60

VT supervision 60

Programmable stages 99

Programmable logic

Programmable curve