Siemens SIPROTEC 7SD610, Руководство пользователя

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Functions
2.16 Function Control and Circuit Breaker Test
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
231
Spontaneous Indications
Spontaneous indications are fault indications which appear in the display automatically following a general fault
detection or trip command of the device. For the 7SD610, these indications include:
„Relay PICKUP“: Protection function that picked up;
„PU Time“ : Operating time from the general pickup to the dropout of the device, in ms;
„TRIP Time“ : the operating time from general pickup to the first trip command of the
device, in ms;
2.16.1.5 Tripping Logic of the Entire Device
Three-pole tripping
In general, the device trips three-pole in the event of a fault. Depending on the version ordered (see Section
A.1, „Ordering Information“), single-pole tripping is also possible. If, in general, single-pole tripping is not pos-
sible or desired, the output function
„Relay TRIP“
is used for the trip command output to the circuit breaker.
In these cases, the following sections regarding single-pole tripping are not of interest.
Single-pole tripping
Single-pole tripping only makes sense on overhead lines on which automatic reclosure is to be carried out and
where the circuit breakers at both ends of the line are capable of single-pole tripping. Single-pole tripping of the
faulted phase with subsequent reclosure is then possible for single phase faults; three-pole tripping is generally
performed in case of two-phase or three-phase faults with and without earth.
Device prerequisites for phase segregated tripping are:
• Phase segregated tripping is provided by the device (according to the ordering code);
• The tripping function is suitable for pole-segregated tripping (for example, not for frequency protection, ov-
ervoltage protection or overload protection),
• The binary input „>1p Trip Perm“ is configured and activated or the internal automatic reclosure function
is ready for reclosure after single-pole tripping.
In all other cases tripping is always three-pole. The binary input „>1p Trip Perm“ is the logic inversion of a
three-pole coupling and activated by an external auto-reclosure device as long as this is ready for a single-pole
auto-reclosure cycle.
With the 7SD610, it is also possible to trip three-pole when only one phase is subjected to the trip conditions,
but more than one phase indicates a fault detection. This can be the case, for instance, when two faults at dif-
ferent locations occur simultaneously, but only one of them is within the range of the differential protection. This
is selected with the setting parameter
3pole coupling (address 1155 ), which can be set to with PICKUP
(every multiple-phase fault detection causes three-pole trip) or with TRIP (in the event of multiple-phase
faults in the tripping area, the tripping is always three-pole).
The tripping logic combines the trip signals from all protection functions. The trip commands of those functions
that allow single-pole tripping are phase segregated. The corresponding indications are named
„Relay TRIP
L1“ , „Relay TRIP L2“ and „Relay TRIP L3“ .
These indications can be allocated to LEDs or output relays. In the event of three-pole tripping all three indi-
cations are displayed. These alarms are also intended for the trip command output to the circuit breaker.
If single-pole tripping is possible, the protection functions generate a group signal for the local display of fault
indications and for the transmission of the indications to a PC or a central control system, e.g. for single-pole
tripping by differential protection
„Diff TRIP 1p L1“ , „Diff TRIP 1p L2“ , „Diff TRIP 1p L3“ and
„Diff TRIP L123“ for three-pole tripping; only one of these messages is displayed at a time.