3 FEATURES AND FUNCTIONS
3.1 PROTECTION FUNCTIONS
The P747 provides the following protection functions:
Protection Function IEC 61850 ANSI
Phase segregated biased current differential high speed busbar protection PhsPDIF 87BB/P
Check Zone segregated biased phase current differential high speed busbar protection CzPPDIF 87CZ/P
Definite Time overcurrent protection (2 stages) OcpPTOC 50/P
IDMT overcurrent protection (2 stages) OcpPTOC 51/P
Dead zone phase protection (short zone between CTs and open CBs) DzpPhsPTOC 50DZ
CB Failure (auxiliary contacts or fast undercurrent) RBRF 50BF
CB Failure and isolator state monitoring
Lockout RBRF 89
Undervoltage control 27
VT blocking scheme based on V< VTS
3.2 CONTROL FUNCTIONS
Feature IEC 61850 ANSI
Watchdog contacts
Read-only mode
NERC compliant cyber-security
Function keys (up to 10) FnkGGIO
Programmable LEDs (up to 18) LedGGIO
Programmable hotkeys (2)
Programmable allocation of digital inputs and outputs
Fully customizable menu texts
Circuit breaker control, status & condition monitoring XCBR 52
Trip circuit and coil supervision
Control inputs PloGGIO1
Power-up diagnostics and continuous self-monitoring
Dual rated 1A and 5A CT inputs
Alternative setting groups (4)
Graphical programmable scheme logic (PSL)
Fault locator RFLO
3.3 MEASUREMENT FUNCTIONS
Measurement Function IEC 61850 ANSI
Measurement of all instantaneous & integrated values
(Exact range of measurements depend on the device model)
MET
Disturbance recorder for waveform capture – specified in samples per
cycle
RDRE DFR
Fault Records
Chapter 1 - Introduction MiCOM P747
6 P747-TM-EN-1
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