General; Functional Scope; Functional Description; Setting Notes - Siemens SIPROTEC 4 Manual

Functions

2.1 General

2.1 General
The settings associated with the various device functions can be modified using the operating or service inter-
face in DIGSI in conjunction with a personal computer. Some parameters can also be changed using the
controls on the front panel of the device. The procedure is described in detail in the SIPROTEC System Descrip-
tion /1/ SIPROTEC 4 System
2.1.1

Functional Scope

The 7SJ80 relay contains protection functions as well as auxiliary functions. The hardware and firmware is
designed for this scope of functions. Additionally, the control functions can be matched to the system require-
ments. Individual functions can be enabled or disabled during the configuration procedure. The interaction of
functions may also be modified.

Functional Description

2.1.1.1
Setting the Functional Scope
Example for the configuration of the functional scope:
A protected system consists of overhead lines and underground cables. Since automatic reclosing is only
needed for the overhead lines, the automatic reclosing function is not configured or "disabled" for the relays
protecting the underground cables.
The available protection and additional functions can be configured as Enabled or Disabled. For individual
functions, a choice between several alternatives may be possible, as described below.
Functions configured as Disabled are not processed by the 7SJ80. There are no messages and corresponding
settings (functions, limit values) queried during configuration.
NOTE
i
i
Available functions and default settings are depending on the order variant of the relay (see
Information and

Setting Notes

2.1.1.2
Setting the Functional Scope
Your protection device is configured using the DIGSI software. Connect your personal computer either to the
USB port on the device front or to port A or port B on the bottom side of the device depending on the device
version (ordering code). The operation via DIGSI is explained in the SIPROTEC 4 System Description.
The Device Configuration dialog box allows you to adjust your device to the specific system conditions.
Password no. 7 is required (for parameter set) for changing configuration parameters in the device. Without
the password the settings can only be read but not edited and transmitted to the device.
Special Features
Most settings are self-explanatory. The special cases are described in the following.
If you want to use the setting group change function, set address 103 Grp Chge OPTION to Enabled. In
this case, you can select up to four different groups of function parameters between which you can switch
quickly and conveniently during operation. Only one setting group can be used when selecting the option
Disabled.
For the elements associated with non-directional overcurrent protection 50(N), 51(N) (phase and ground),
various tripping characteristics can be selected at addresses 112 Charac. Phase and 113 Charac.
Ground. If only the definite time characteristic is desired, select Definite Time. Alternatively, you can
select between inverse-time curves according to IEC standard (TOC IEC) or ANSI standard (TOC ANSI). The
dropout behavior of the IEC and ANSI curves is specified at address 1210 or 1310 when configuring the time
overcurrent protection.
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Description.
Accessories).
A Ordering
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017