Siemens SIPROTEC 7SD610, Руководство пользователя

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Functions
2.1 General
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
31
Note
The functions and default settings available depend on the device version ordered.
2.1.1.2 Setting Notes
Configuring the functional scope
The scope of functions with the available options is set in the
Functional Scope
dialog box to match plant re-
quirements.
Most settings are self-explanatory. The special cases are described below:
Special Cases
If use of the setting group changeover function is desired, address
103 Grp Chge OPTION
should be set to
Enabled
. In this case, up to four different groups of settings may be changed quickly and easily during device
operation (see also Section 2.1.3). With the setting
Disabled
only one parameter group is available.
Address
110 Trip mode
is only valid for devices that can trip single-pole or three-pole. Set
1-/3pole
to
enable also single-pole tripping, i.e. if you want to utilise single-pole or single-pole/three-pole automatic reclo-
sure. This requires that an internal automatic reclosure function exists or that an external reclosing device is
used. Furthermore, the circuit breaker must be capable of single-pole tripping.
Note
If you have changed address
110
, save your changes first via
OK
and reopen the dialog box since the other
setting options depend on the selection in address
110
.
The differential protection function
DIFF.PROTECTION
(address
112
) as a main function of the device should
always be
Enabled
. This also implies the supplementary functions of the differential protection such as
breaker intertrip.
The Direct Local Trip (address
122 DTT Direct Trip
) is a command that is initiated from an external device
for tripping the local circuit breaker.
At address
126 Back-Up O/C
you can set the characteristic group which the time overcurrent protection uses
for operation. In addition to the definite-time overcurrent protection (definite time), an inverse-time overcurrent
protection can be configured that either operates according to an IEC characteristic (
TOC IEC
) or to an ANSI
characteristic (
TOC ANSI
). This selection is independent of whether the time overcurrent protection is intended
to operate as emergency protection (only in case of protection communication failure) or as independent
backup protection. In device variants with directional time overcurrent protection (MLFB position 14 = R or S),
you have an additional directional definite-time overcurrent stage and a directional current dependent inverse
time stage available. The characteristic curves for both inverse-time overcurrent stages are identical. The
various characteristics are shown in the Technical Data (Section 4.6). You can also disable the time overcurrent
protection (
Disabled
).
If the device features an automatic reclosing function, address
133
and
134
are of importance. Automatic re-
closure is only permitted for overhead lines. It must not be used in any other case. If the protected object con-
sists of a combination of overhead lines and other equipment (e.g. overhead line in unit with a transformer or
overhead line/cable), reclosure is only permissible if it can be ensured that it can only take place in the event
of a fault on the overhead line. If no automatic reclosing function is desired for the feeder at which 7SD610
operates, or if an external device is used for reclosure, set address
133 Auto Reclose
to
Disabled
.