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2.1 General

7SD5 Manual

C53000-G1176-C169-1

2.1.3 Change Group

2.1.3.1 Purpose of the Setting Groups

Up to four independent setting groups can be created for establishing the device's

function settings. During operation, the user can locally switch between setting groups

using the operator panel, binary inputs (if so configured), the operator and service in-

terface per PC, or via the system interface. For reasons of safety it is not possible to

change between setting groups during a power system fault.

A setting group includes the setting values for all functions that have been selected as

Enabled during configuration (see Section 2.1.1.3). In 7SD5 devices, four indepen-

dent setting groups (A to D) are available. Whereas setting values and options may

vary, the selected scope of functions is the same for all groups.

Setting groups enable the user to save the corresponding settings for each applica-

tion. When they are needed, settings may be loaded quickly. All setting groups are

stored in the relay. Only one setting group may be active at a given time.

2.1.3.2 Setting Notes

General If multiple setting groups are not required. Group A is the default selection. Then, the

rest of this section is not applicable.

If multiple setting groups are desired, the setting group change option must be set to

Grp Chge OPTION = Enabled in the relay configuration of the functional scope

(Section 2.1.1.3, address 103). For the setting of the function parameters, you can

configure each of the required setting groups A to D, one after the other. A maximum

of 4 is possible. To find out how to proceed, how to copy and to reset settings groups,

and how to switch between setting groups during operation, please refer to the

SIPROTEC

4 System Description.

Two binary inputs enable changing between the 4 setting groups from an external

source.

251 K_ALF/K_ALF_N 1.00 .. 10.00 1.00 k_alf/k_alf nominal

253 E% ALF/ALF_N 0.5 .. 50.0 % 5.0 % CT Error in % at k_alf/k_alf

nominal

254 E% K_ALF_N 0.5 .. 50.0 % 15.0 % CT Error in % at k_alf nominal

Addr. Parameter Setting Options Default Setting Comments

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