Functions
2.1 General
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
35
2.1.1.2
Setting Notes
Setting the Functional Scope
Configuration settings can be entered using a PC and the software program DIGSI and transferred via the front
serial port or the rear service interface of the device. The operation via DIGSI is explained in the SIPROTEC 4
System Description.
For changing configuration parameters in the device, password no.7 is required (for parameter set). Without
the password, the settings can be read but not modified and transmitted to the device.
The functional scope with the available options is set in the
Functional Scope
dialog box to match plant re-
quirements.
Special Features
Most settings are self-explanatory. The special features are described below.
If you want to use the setting group change function, set address
103
Grp Chge OPTION
to
Enabled
. Simple
and fast changeover between up to four different setting groups is possible in service. Only
one
setting group
can be selected and used if this option is
Disabled
.
For the overcurrent elements of the time overcurrent protection (separately for phase currents and ground cur-
rent), various tripping characteristics can be selected at address
112
Charac. Phase
and
113
Charac.
Ground
. If only the definite characteristic is desired, then
Definite Time
should be selected. Additionally,
depending on the version ordered, various inverse time characteristics, based on either IEC (
TOC IEC
) stan-
dards or ANSI (
TOC ANSI
standards), or user-defined characteristic are available for selection. The dropout
behaviour of the IEC and ANSI characteristics will be specified later with settings (addresses
1210
and
1310
).
But for the user-defined characteristic, you can choose in address
112
and
113
whether to specify only the
pickup characteristic (
User Defined PU
) or the pickup and the dropout characteristic (
User def. Reset
).
Additionally, the superimposed high-current elements 50-2 and 50-3 are available in all these cases. Time over-
current protection may be set to
Disabled
during configuration.
For directional time overcurrent protection, the same information that was entered for the non-directional time
overcurrent protection (except the
50-3
element) can be entered under addresses
115
67/67-TOC
and
116
67N/67N-TOC
.
For the (sensitive) ground fault detection, the measurement procedures
cos
ϕ
/ sin
ϕ
or
V0/I0
ϕ
mea.
for direction determination can be set via the parameter
130
S.Gnd.F.Dir.Ch
.
cos
ϕ
/ sin
ϕ
the stan-
dard procedure (via residual wattmetric current detection) set by default. If the measurement procedure
cos
ϕ
/ sin
ϕ
is set, you can select between an inverse (
Definite Time
) characteristic, a
User Defined PU
and two logarithmic inverse characteristics at address
131
Sens. Gnd Fault
. The setting
V0/I0
ϕ
mea.
provides the definite time characteristic
Definite Time
. When selecting the setting
Disabled
, the entire
function is disabled.
For the intermittent ground fault protection, you can specify the measured quantity (
with Ignd
,
with 3I0
or
with Ignd,sens.
) to be used by this protection function at address
133
INTERM.EF
.
For negative sequence current protection, address
140
46
is used to specify whether the tripping characteris-
tics should be
Definite Time
,
TOC ANSI
or
TOC IEC
, or whether the function is to be
Disabled
.
For overload protection, address
142
49
allows you to specify whether the thermal replica of the overload pro-
tection will account for a coolant temperature or ambient temperature (
With amb. temp.
) or not (
No
ambient temp
), or whether the entire function is
Disabled
.
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