Introduction
1-12
7SA6 Manual
C53000-G1176-C156-2
•
Measuring voltages optionally phase-phase or phase-earth
Voltage
Protection
(optional)
Overvoltage and undervoltage detection with different stages
•
Two overvoltage stages for the phase-earth voltages, with common time delay
•
Two overvoltage stages for the phase-phase voltages, with common time delay
•
Two overvoltage stages for the positive sequence voltage, with a time delay each
•
Two overvoltage stages for the negative sequence voltage, with a time delay each
•
Two overvoltage stages for the zero sequence voltage or any other single-phase
voltage, with a time delay each
•
Settable drop-off to pick-up ratios for the overvoltage protection functions
•
Two undervoltage stages for the phase-earth voltages with common time delay
•
Two undervoltage stages for the phase-phase voltages with common time delay
•
Two undervoltage stages for the positive sequence voltage, with a time delay each
•
Settable current criterion for undervoltage protection functions
Fault Location
•
Initiated by trip command or reset of the fault detection;
•
Computation of the distance to fault with dedicated measured value registers;
•
Fault location output in ohm, kilometers or miles and % of line length;
•
Parallel line compensation can be selected;
•
Optional function; taking into consideration the load current in case of single-phase
earth faults fed from both sides
•
Fault location output as BCD-code or analog value (dependent on the order variant)
Circuit Breaker
Failure Protection
(optional)
•
With independent current stages for monitoring current flow through every pole of
the circuit breaker;
•
With independent monitoring time steps for single-pole and three-pole tripping;
•
Start by trip command of every internal protection function;
•
Start by external trip functions possible;
•
Single or two stages
•
Short drop off and overshoot times.
Thermal Overload
Protection
(optional)
•
Thermal display of ohmic loss of the protected object
•
R. m. s. measurement for all three phase currents
•
Settable thermal and current alarm stages
Analog Outputs
(optional)
•
Output of up to four analog values (dependent on the order variant) is possible:
measured values, fault location, breaking earth fault current
User Defined Logic
Functions
•
Freely programmable combination of internal and external signals for the
implementation of user defined logic functions;
•
All common logic functions;
Summary of Contents for siprotec 7SA6
Page 2: ...Siemens Aktiengesellschaft Book No C53000 G1176 C156 2 ...
Page 18: ...xviii 7SA6 Manual C53000 G1176 C156 2 ...
Page 32: ...Introduction 1 14 7SA6 Manual C53000 G1176 C156 2 ...
Page 82: ...Hardware and Connections 2 50 7SA6 Manual C53000 G1176 C156 2 ...
Page 119: ...SIPROTEC 4 Devices 4 25 7SA6 Manual C53000 G1176 C156 2 Figure 4 20 CFC Logic example ...
Page 190: ...Configuration 5 62 7SA6 Manual C53000 G1176 C156 2 ...
Page 652: ...Installation and Commissioning 8 78 7SA6 Manual C53000 G1176 C156 2 ...
Page 724: ...Technical Data 10 56 7SA6 Manual C53000 G1176 C156 ...
Page 800: ...Appendix A 76 7SA6 Manual C53000 G1176 C156 2 ...
Page 866: ...Appendix B 66 7SA6 Manual C53000 G1176 C156 2 ...
