Information To A Control Center; Statistics; Functional Description - Siemens SIPROTEC 4 Manual

For cos-ϕ / sin-ϕ measurements, a criterion for the opening of the ground fault log is the pickup of the VN>-
element. For "U0/I0-ϕ measurements" the ground fault log is opened as soon as a VN>-element has responded
and the angle condition is fulfilled. (Detailed information is provided in the logic diagrams for ground fault
detection, Section
the fault recording is terminated. The ground fault log is opened as soon as the message 1271
Pickup (appearing) is issued and terminated upon disappearing of such message.
Up to 45 ground fault messages can be recorded for the last 3 ground faults. If more ground fault messages
are generated, the oldest are deleted consecutively.
General Interrogation
The general interrogation which can be retrieved via DIGSI enables the current status of the SIPROTEC 4 device
to be read out. All messages requiring general interrogation are displayed with their present value.
Spontaneous Messages
The spontaneous messages displayed using DIGSI reflect the present status of incoming information. Each
new incoming message appears immediately, i.e. the user does not have to wait for an update or initiate one.

Information to a Control Center

2.23.1.3
Stored information can additionally be transferred to a central control and storage device if the relay is
connected to such a device via port B. Transmission is possible via various transmission protocols.
2.23.2

Statistics

The number of trips initiated by the 7SJ80, the number of close commands initiated by the AR and the oper-
ating hours under load are counted.
An additional counter allows the number of hours to be determined in which the circuit breaker is positioned
in the "open" condition. Further statistical data can be gained to optimize the intervals for circuit breaker main-
tenance.
The counter and memory levels are secured against loss of auxiliary voltage.
During the first start of the protection device the statistical values are pre-defined to zero.
2.23.2.1

Functional Description

Number of Trips
In order to count the number of trips of 7SJ80, the 7SJ80 relay has to be informed of the position of the circuit
breaker auxiliary contacts via binary inputs. Hereby, it is necessary that the internal pulse counter
TRIPs= is allocated in the matrix to a binary input that is controlled by the circuit breaker OPEN position. The
pulse count value "Number of TRIPs CB" can be found in the "Statistics" group if the option "Measured and
Metered Values Only" was enabled in the configuration matrix.
Number of Automatic Reclosing Commands
The number of reclosing commands initiated by the automatic reclosing function is summed up in separate
counters for the 1st and ≥ 2nd cycle.
Operating Hours
The operating hours under load are also stored (= the current value in at least one phase is greater than the
limit value BkrClosed I MIN set under address 212).
Hours Meter "CB open"
A meter can be realized as a CFC application if it adds up the number of hours in state "Circuit Breaker open"
similarly to the operating hours meter. The universal hours meter is linked to a respective binary input and
counts if the binary input is active. Alternatively, the undershooting of the parameter value 212 BkrClosed
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
2.12 Ground Fault Protection 64, 67N(s), 50N(s),
2.23 Auxiliary Functions
51N(s)). As soon as the pickup drops out,
Sens.Gnd
Functions
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