Relationships between setting parameter Base Current, CT
Example................................................................................. 51
Examples how to connect, configure and set VT inputs
for most commonly used VT connections.............................. 52
Examples on how to connect a three phase-to-earth
connected VT to the IED........................................................ 53
Example on how to connect a phase-to-phase
connected VT to the IED........................................................ 55
Example on how to connect an open delta VT to the IED
for high impedance earthed or unearthed networks...............57
Example how to connect the open delta VT to the IED
for low impedance earthed or solidly earthed
power systems....................................................................... 60
Section 5 Local HMI....................................................................... 63
Display..............................................................................................64
LEDs.................................................................................................66
Keypad............................................................................................. 67
Local HMI functionality..................................................................... 69
Protection and alarm indication................................................... 69
Parameter management .............................................................70
Front communication...................................................................71
Section 6 Multipurpose protection..................................................73
General current and voltage protection CVGAPC............................ 73
Current and voltage selection for CVGAPC function..............74
Base quantities for CVGAPC function....................................77
Application possibilities.......................................................... 77
Inadvertent generator energization........................................ 78
Setting guidelines........................................................................ 79
Directional negative sequence overcurrent protection........... 79
Negative sequence overcurrent protection.............................81
Generator stator overload protection in accordance with
IEC or ANSI standards........................................................... 83
Open phase protection for transformer, lines or
generators and circuit breaker head flashover protection
for generators......................................................................... 85
Voltage restrained overcurrent protection for generator
and step-up transformer......................................................... 86
Loss of excitation protection for a generator.......................... 87
Section 7 Secondary system supervision.......................................89
Table of contents
2
Bay control REC650 2.2 IEC
Application manual
