Functions
284
7UM62 Manual
C53000-G1176-C149-3
2.44.4 Statistical Counters
2.44.4.1 Functional Description
Number of Trips
The number of trips initiated by the 7UM62 is counted, as long as the position of the
circuit breaker is monitored via breaker auxiliary contacts and binary inputs. To use
this function, the internal pulse counter ”
Trip Count
” is masked in the matrix to a
binary input that is controlled by the circuit breaker OPEN position. The pulse count
value ”
Trip Count
” can be found in the submenu ”Statistic” if ”Measured and
Metered Values Only” has been selected in the matrix.
Switch-Off Values
(at Trip)
Additionally, the following switch-off values are indicated in the fault messages for
each trip signal:
−
the primary currents in all three phases in kA, individually for side 1 and side 2
−
if tripping has been initiated by the differential protection, the differential and
restraint currents of all three phases are indicated.
−
the three phase-earth-voltages in kV
−
primary active power P in kW, MW or GW (precisely averaged power)
−
primary reactive power Q in kVA, MVA or GVA (precisely averaged power)
−
frequency in Hz
Operating Hours
The operating hours under load (= the current value in at least one phase is larger than
the limit value
) set at address
0281
) are also stored.
Accumulated
Shutdown Currents
The shutdown currents for each phase, which are indicated at every trip command
individually for side 1 and side 2, are accumulated and stored.
The counter and memory levels are secured against loss of auxiliary voltage.
2.44.4.2 Setting/Resetting
The above listed statistical counters are set and reset in the menu
ANNUNCIATIONS
→
STATISTIC
by overwriting the displayed counter values.
