Siemens SIPROTEC 7SA6 Manual page 31

Distance protection relay for all voltage levels

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Table of Contents

Commissioning;

Operation (only with

Digital Transmission

of Protection Data)

Further Functions

C53000-G1176-C156-2

• Time delays and measured value set point interrogation.

• Display of magnitude and phase angle of local and remote measured values;

• Display of the measured values of the communication link, such as runtime and

availability.

• Switching on and off switchgears manually via the local control keys, configurable

function keys, via the system interface (e.g. of the SICAM

operator interface (by means of personal computers and the operating program

• Feedback information on switching states via the circuit breaker auxiliary contacts

(for commands with feedback information)

• Plausibility check of the circuit breaker positions and interlocking conditions, for

switching operations

• Monitoring of the internal measuring circuits, the auxiliary supply, as well as the

hard- and software, resulting in increased reliability;

• Monitoring of the current and voltage transformer secondary circuits by means of

summation and symmetry checks;

• Trip circuit supervision is possible;

• Checking for the load impedance, the measured direction and the phase sequence;

• Monitoring the signal transmission of the digital communication way (optional).

• Battery buffered real time clock, which may be sychronized via a synchronization

signal (DCF77, IRIG B via satellite receiver), binary input or system interface;

• Fault event memory for the last 8 network faults (faults in the power system), with

real time stamps (ms-resolution);

• Earth fault protocols for up to 8 earth faults (devices with sensitive earth fault

• Fault recording memory and data transfer for analogue and user configurable

binary signal traces with a maximum time range of 15 s;

• Switching statistic: the statistic comprises the number of trip and close commands

issued by the device, the recorded fault data and interrupted fault currents;

• Commissioning aids such as connection and direction checks as well as circuit

breaker test functions. All binary inputs and outputs can be displayed and set

directly. This can simplify the wiring check process significantly for the user.

Introduction

or LSA) or via the