Table of Contents
Advertisement
• Additional stage, e.g. stub protection, for fast tripping of faults between the current transformer and line iso-
lator (when the isolator switching status feedback is available); particularly suitable for substation with circuit
breaker arrangement 1
Circuit Breaker Failure Protection (optional)
• Start by external trip functions;
• Start by trip command of every internal protection function
• Single-stage or two-stage
• Short dropout and overshoot times
• Independent timers for single-pole and three-pole tripping;
• Short dropout and overshoot times
Voltage Protection (optional)
• Overvoltage and undervoltage detection with different stages
• Two overvoltage stages for the phase-earth voltages
• Two overvoltage stages for the phase-phase voltages
• Two overvoltage stages for the positive sequence voltage, with a time delay each;
• Two overvoltage stages for the negative sequence voltage
• Two overvoltage stages for the zero sequence voltage or any other single-phase voltage
• Settable dropout to pickup ratios
• Two undervoltage stages for the phase-earth voltages
• Two undervoltage stages for the phase-phase voltages
• Two undervoltage stages for the positive sequence voltage
• Settable current criterion for undervoltage protection functions
User-defined Logic Functions (CFC)
• Freely programmable combination of internal and external signals for the implementation of user-defined
logic functions
• All usual logic functions
• Time delays and limit value inquiries
Command Processing
• Circuit breakers can be opened and closed manually via programmable function keys, via the system inter-
face (e.g. SICAM or LSA), or via the operating interface (using a PC with DIGSI);
• Feedback on switching states via the circuit breaker auxiliary contacts (for commands with feedback)
• Plausibility monitoring of the circuit breaker position and monitoring of interlocking conditions for switching
operations
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
1
/
2
Introduction
1.3 Characteristics
21
Advertisement
Table of Contents
