Statistics; Description - Siemens siprotec SJ62 User Manual

2.23.3 Statistics

2.23.3.1 Description

Number of Trips
Number of Auto-
matic Reclosing
Commands
Operating Hours
Hours counter "Cir-
cuit breaker is
open".
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
The number of trips initiated by the 7SJ62/63/64, the number of close commands ini-
tiated by the AR and the operating hours under load are counted. An additional
counter allows the number of hours to be determined in which the circuit breaker is
positioned in condition „open". Further statistical data can be gained to optimize the
intervals for circuit breaker maintenance.
The counter and memory levels are secured against loss of auxiliary voltage.
In order to count the number of trips of the 7SJ62/63/64, the position of the circuit
breaker must be monitored via breaker auxiliary contacts and binary inputs of the
7SJ62/63/64. Hereby it is necessary that the internal pulse counter 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.
The number of reclosing commands initiated by the automatic reclosing function is
summed up in separate counters for the 1st and ≥ 2nd cycle.
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).
A counter can be implemented as CFC application which, similarly to the operating
hours counter, counts the hours in the condition „circuit breaker open". The universal
hours counter is connected to a corresponding binary input and starts counting if the
respective binary input is active. Alternatively, the counter can be started when the pa-
rameter value 212 BkrClosed I MIN is undershot. The counter can be set or reset.
A CFC application example for such a counter is available on the Internet (SIPROTEC
Download Area).
2.23 Auxiliary Functions
320