Control Of Device Functions; Read And Set Date And Time - Siemens SIPROTEC 7SA6 Manual

Distance protection relay for all voltage levels

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Table of Contents

Control During Operation

Control of Device Functions

You may change individual functions and messages in a 7SA6 while the device is in-

service. Some examples are given above, including deleting stored information (Sub-

section 7.1.1.5) and setting/resetting counters and set-points (Sub-sections 7.1.2.2

and 7.1.3.3). In this section, three other control capabilities are discussed. They are

correcting the date and time, changing the settings group, and affecting information at

the system interface during test operations.

The 7SA6 device can be connected to an external clock source, binary input or use

the internal RTC for time and date stamping.

Whether and by which synchronization source the internal clock should be set was al-

ready determined in Section 5.7, "Date and Time Stamping". Once the device is not

supplied with power, the internal time clock (RTC) continues working by taking its pow-

er from the integrated buffer battery. Right after the running up of the device it displays

a plausible time. The time then is changed automatically by the synchronization

source linked to the device or is altered manually. Before initiating a synchronization

process which is going to stamp a valid time, different types of time indication in the

device display are possible. The following paragraph gives you more details about this

Besides the display of date and time, the status of these readings is also provided. The

text of the status display can have the appearances given in Table 7-3, under regular

conditions of time control.

synchronized

not synchronized

C53000-G1176-C156-2