To Next Page

To Previous Page

Introduction

1.3 Characteristics

SIPROTEC, 7SD610, Manual

C53000-G1176-C145-6, Release date 02.2011

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, optionally with compounding

• 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

Frequency Protection (optional)

• Monitoring on underfrequency (f<) and/or overfrequency (f>) with 4 frequency limits and delay times that are

independently adjustable

• Very insensitive to harmonics and abrupt phase angle changes

• Large frequency range (approx. 25 Hz to 70 Hz)

Circuit Breaker Failure Protection (optional)

• With definite time current stages for monitoring the current flow through every pole of the circuit breaker

• Separate pickup thresholds for phase and earth currents

• Independent timers for single-pole and three-pole tripping;

• Start by trip command of every internal protection function

• Start by external trip functions possible

• Single-stage or two-stage

• Short dropout and overshoot times

• End fault protection and pole discrepancy monitoring possible

Thermal Overload Protection

• Thermal replica of the current heat losses of the protected object

• R.M.S. measurement of all three phase currents

• Settable thermal and current-dependent warning stages

User-defined Logic Functions (CFC)

• Freely programmable combination of internal and external signals for the implementation of user-defined

logic functions

• All typical logic functions

• Time delays and limit value inquiries

Siemens SIPROTEC 7SD610 User Manual

Other manuals for Siemens SIPROTEC 7SD610