General; Functional Scope; Configuration Of The Scope Of Functions - Siemens SIPROTEC 7SD610 Manual

Functions

2.1 General

2.1 General
A few seconds after the device is switched on, the default display appears on the LCD. In the 7SD610 the mea-
sured values are displayed.
Configuration settings can be entered by using a PC and the DIGSI operating software and transferred via the
operator interface on the front panel of the device or via the service interface. The procedure is described in
detail in the SIPROTEC 4 System Description. Entry of password no. 7 (parameter set) is required to modify
configuration settings. Without the password, the settings may be read, but may not be modified and transmit-
ted to the device.
The function parameters, i.e. function options, threshold values, etc., can be changed via the front panel of the
device, or via the operator or service interface from a personal computer using DIGSI. The level 5 password
(individual parameters) is required.
This general section describes which device settings reflect the interaction between your substation, its mea-
suring points (current and voltage transformers), the analog device connections and the various protection
functions of the device.
In a first step (Subsection 2.1.1), you have to specify which protection functions you want to use, because not
all of the functions integrated in the device are necessary, useful or even possible for your relevant case of ap-
plication.
After entering some System Data (frequency), you inform the device (Section 2.1.2) of the properties of the
main protected object. This comprises e.g. nominal system data, nominal data of instrument transformers, po-
larity and connection type of measured values
The above information is sufficient to describe the protected object to the device's main protection function, i.e.
the differential protection. For the other protection functions (e.g. overcurrent time protection) you select what
measured values will be processed and in which way.
You will be informed how to set the circuit breaker data, and find out about setting groups and how to use them.
Last but not least, you can set general data which are not dependent on any protection functions.
2.1.1

Functional Scope

2.1.1.1 Configuration of the Scope of Functions

The 7SD610 device contains a series of protection and additional functions. The hardware and firmware is de-
signed for this scope of functions. Additionally, the command functions can be matched to the system condi-
tions. Furthermore, individual functions may be enabled or disabled during configuration, or interaction
between functions may be adjusted.
Example for the configuration of scope of functions:
7SD610 devices can, on overhead lines, also be used with transformers in the protected area. Overload pro-
tection should only be applied on transformers. If the device is used for overhead lines, this function has to be
set „disabled", and if used for transformers, it has to be set „enabled".
The available protection functions and additional functions can be configured as Enabled or Disabled. For
some functions, a choice between several options is possible which are described below.
Functions configured as Disabled are not processed by the 7SD610. There are no indications, and corre-
sponding settings (functions, limit values) are not displayed during setting.
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SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011