GE P24DM - Features and Functions; Protection Functions

4 FEATURES AND FUNCTIONS
4.1 PROTECTION FUNCTIONS
The P24xM models offer the following protection functions:
ANSI IEC 61850 Protection Function P24NM P24DM
50 OcpPTOC Definite time overcurrent protection 6 stages 6 stages
50N EfdPTOC
Neutral/earth definite time overcurrent protection
Measur
ed and derived (standard EF CT), derived (SEF CT)
4 stages 4 stages
51 OcpPTOC IDMT overcurrent protection (stages) 3 stages 3 stages
51N EfdPTOC Neutral/earth IDMT overcurrent protection 2 stages 2 stages
50/51SEF SenEftPTOC Sensitive earth fault 4 stages 4 stages
68 Inrush blocking Yes Yes
Cold load pick up Yes Yes
46 NgcPTOC Negative sequence overcurrent 4 stages 4 stages
Programmable curves 4 stages 4 stages
67 OcpPTOC Directional phase overcurrent No 6 stages
67N EfdPTOC Directional neutral overcurrent No 4 stages
Sensitive directional earth fault No 4 stages
Blocking scheme Yes Yes
37 Undercurrent detection (low load) Yes Yes
32 RevPowPDOP Phase directional power (reverse) No Yes
49 ThmPTTR Motor thermal overload Yes Yes
50BF RBRF CB failure 2 stages 2 stages
66 MotPMSS Number of starts Yes Yes
27 VtpPhsPTUV Undervoltage No 3 stages
27V PsvPTUV Positive sequence undervoltage No 2 stages
59 VtpPhsPTOV Overvoltage No 3 stages
59V PsvPTOV Positive sequence overvoltage No 2 stages
59N VtpResPTOV Residual overvoltage No 3 stages
47 NgvPTOV Negative sequence overvoltage No 2 stages
27Abs AbsPTUV Anti-backspin No Yes
81O FrqPTOF Overfrequency No 9 stages
81U FrqPTUF Underfrequency No 9 stages
81V DfpPFRC Undervoltage blocking of frequency protection No Yes
81df/dt Rate of change of frequency (dv/dt) No 9 stages
81RF DfpPFRC Frequency supervised rate of change of frequency No Yes
81RAV DfpPFRC Frequency supervised average rate of change of frequency No Yes
81R Frequency Restoration No Yes
48/51LR MotPMRI Start/Stalled Protection Yes Yes
Emergency restart Yes Yes
Motor reacceleration No Yes
PSL Programmable scheme logic Yes Yes
86 Latching output contacts (Lockout) Yes Yes
P24xM Chapter 1 - Introduction
P24xM-TM-EN-2.1 7