Siemens siprotec SJ62, Руководство пользователя

Страница: 39 / 715

2 Functions
37
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Special Character-
istics Most settings are self-explanatory. However, special characteristics are described
below.
If the setting group change function has to be used, address
103 Grp Chge OPTION
must be set to
Enabled
. In service, simple and fast changeover between up to four
different groups of settings is possible Only one setting group may be selected and
used if this option is
Disabled
.
For the relay elements associated with non-directional overcurrent protection (sepa-
rately for phase and ground), various tripping characteristics may be selected at ad-
dresses
112 Charac. Phase
and
113 Charac. Ground
. If only the definite time
characteristic is desired, then
Definite Time
should be selected. Additionally, de-
pending on the relay type ordered, various inverse time characteristics, based on
either IEC (
TOC IEC
) standards or ANSI (
TOC ANSI
) standards, or user-defined
characteristic are available for selection. The dropout behavior of the IEC and ANSI
characteristics will be specified later with settings (addresses
1210
and
1310
), how-
ever, for the user-defined characteristic you determine in address
112
and
113
whether to specify only the pickup characteristic (
User Defined PU
) or the pickup
and the reset time characteristic (
User def. Reset
).
The superimposed high-current element 50-2 or 50N-2 is available in all these cases.
Time overcurrent protection can be disabled by setting the function to
Disabled
.
For directional overcurrent protection, the same information that was entered for the
non-directional overcurrent protection can be entered at addresses
115 67/67-TOC
and
116 67N/67N-TOC
.
For (sensitive) ground fault detection, address
131 Sens. Gnd Fault
is used to
specify whether this function should be enabled with definite time tripping characteris-
tics (
Definite Time
), a
User Defined PU
and two logarithmic inverse character-
istics or disabled by setting to
Disabled
.
For the intermittent ground fault protection specify in address
133 INTERM.EF
the
measured quantity (
with Ignd
,
with 3I0
or
with Ignd,sens.
) which is to be
used by this protection function.
For negative sequence current protection, address
140 46
is used to specify whether
the tripping characteristics should be
Definite Time
,
TOC ANSI
or
TOC IEC
, or
whether the function is to be
Disabled
.
Set in address
142 49
for the overload protection whether (
With amb. temp.
) or
not (
No ambient temp
) the thermal replica of the overload protection will account
for a coolant temperature or ambient temperature or whether the entire function is set
to
Disabled
.
The flexible protective functions (only 7S64) can be configured in parameter
FLEXIBLE FUNC.
. You can create max. 20 functions. This can be done by marking
(setting ticks) the functions (see example in Section 2.18). If the marking (the tick) of
a function is removed, all the settings and allocations previously made are lost. All the
settings and locations are located in the default setting when a new marking of the
function takes place. The setting of the flexible function is performed in DIGSI under „
Parameter“, „Additional Functions“ and„ Settings“. The allocation is performed, as
usually, under „Parameter“ and „Allocation“.
Up to four function groups are available for the synchronizing function. They are
enabled in address 016x (x = 1 ... 4). Parameters
161 25 Function 1
to
164 25
Function 4
indicate whether a synchronizing function is to be
Disabled
or
Enabled
. The latter is determined by selecting the operating mode
ASYN/SYNCHRON
(closing takes place for asynchronous and synchronous conditions) or
SYNCHROCHECK
(corresponds to the classical synchro-check function). The function
groups which are configured to be enabled via
ASYN/SYNCHRON
or
SYNCHROCHECK