2 Functions
40
7SD5 Manual
C53000-G1176-C169-1
Distance
Protection
Depending on the ordered version, the distance protection of the 7SD5, if configured
as the main protection function or in combination with differential protection, features
a range of fault detection modes, from which the appropriate type for the particular
system conditions can be selected. If the device is equipped with impedance pickup
only (7SD5***-*****-*
E
** and 7SD5***-*****-*
H
**), you can select the tripping charac-
teristic to be used by the distance protection; to do so, set address
115
for phase-
phase measuring units
Phase Distance
and address
116
for phase-earth measur-
ing units
Earth Distance
accordingly. You can choose between the polygonal trip-
ping characteristic
Quadrilateral
and the MHO characteristic
MHO
. The character-
istics and measurement methods are described in detail in Sections 2.5.2 and 2.5.3.
You can choose different settings for the two addresses. If the device is to used only
for phase-earth loops or only for phase-phase loops, set the function that is not re-
quired to
Disabled
.
Other pickup procedures are available with the variants 7SD5***-*****-*
D
** and
7SD5***-*****-*
G
**. The properties of these procedures are described in detail in
Section 2.5.1.
If the fault current magnitude is a reliable criterion for distinction between a fault oc-
currence and load operation (incl. tolerable overload), set Address
117
Dis. PICKUP
=
I> (overcurr.)
(overcurrent pickup). If the voltage surge is required as another
pickup criterion, set
U/I
(voltage-dependent current pickup). For heavily loaded high-
voltage lines and very-high-voltage lines the setting
U/I/
ϕ
(voltage and phase-angle
dependent current pickup) may be required. With setting
Z< (quadrilat.)
(...
pickup) the distance zones which are set highest establish the pickup criteria. If you
set address
117
Dis. PICKUP
to
Disabled
, the distance protection function and all
associated functions will not be available.
Please note that the power swing supplement (see also Section 2.6) only works to-
gether with the
Z< (quadrilat.)
pickup. In all other cases it is ineffective, even
though you have set address
120
Power Swing
=
Enabled
.
To complement the distance protection function by teleprotection schemes, you can
select the desired scheme at address
121
Teleprot. Dist.
. You can select the
permissive underreach transfer trip with pickup
PUTT (Pickup)
and with overreach
zone
PUTT (Z1B)
, the teleprotection scheme
POTT
, directional comparison pickup
Dir.Comp.Pickup
, unblocking with Z1B
UNBLOCKING
, blocking scheme
BLOCKING
, and the schemes with pilot wire comparison
Pilot wire comp
and
Rev. Interlock
(reverse interlocking). If you do not want to use teleprotection in
conjunction with distance protection set
Disabled
.
Other Special
Features
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 trip single-pole or three-pole.
Set
1-/3pole
to enable also single-pole tripping i.e., if you want to utilize single-pole
or single-pole / multi-pole automatic reclosure. This requires an internal automatic re-
closing function to be available or an external reclosing device. 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
.
www
. ElectricalPartManuals
. com
Содержание siprotec 7SD5
Страница 2: ...2 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 4: ...4 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 18: ...Contents 18 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 34: ...1 Introduction 34 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 444: ...2 Functions 444 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 580: ...4 Technical Data 580 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 682: ...Literature 682 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 698: ...Index 698 7SD5 Manual C53000 G1176 C169 1 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...