MEASURES, LOGIC STATES AND COUNTERS
79
NV021 - Manual - 08 - 2012
5 M E A S U R E S , L O G I C S T A T E S A N D C O U N T E R S
Measures
Direct
Frequency
(
f
)
Phase voltages RMS value of fundamental component (
U
L1
,
U
L 2
,
U
L 3
)
Calculated
Maximum voltage between
U
L1
-
U
L 2
-
U
L 3
(
U
Lmax
)
Average voltage between
U
L1
-
U
L 2
-
U
L 3
(
U
L
)
Positive sequence voltage
(
U
1
)
Negative sequence voltage
(
U
2
)
Frequency rate of change
(
df/dt
)
Averages
Ten minutes average voltages
(
U
L1avg
,
U
L2avg
,
U
L3avg
)
Maximum voltage between
U
L1avg
,
U
L2avg
,
U
L3avg
(
U
Lavgmax
)
Protection
For each protection threshold, the following data are available:
Start
ON/OFF
Trip
ON/OFF
Logic block (Block1)
ON/OFF
Delayed inputs
The binary input states, acquired downstream the delay timers are available:
IN1
ON/OFF
IN2
ON/OFF
Internal states
The state of the functions assigned to binary inputs are available (
Read\Internal states
):
Reset LEDs
ON/OFF
Profi le selection
ON/OFF
Fault trigger
ON/OFF
Block1
ON/OFF
Tcs1
ON/OFF
Tcs2
ON/OFF
Trip External protections
ON/OFF
Reset partial counters
ON/OFF
Reset CB monitoring data
ON/OFF
52a
ON/OFF
52b
ON/OFF
Open CB
ON/OFF
Close CB
ON/OFF
Thermal image presetting
ON/OFF
Remote trip
ON/OFF
74VT ext.
ON/OFF
f<-f> Control
ON/OFF
Relays
For every output relay, the output operating state and diagnostic are available (
Read \Relays
menu):
K1 State
ON/OFF
K1 Diagnostic
OK/NOT OK
K2 State
ON/OFF
K2 Diagnostic
OK/NOT OK
......
K6 State
ON/OFF
K6 Diagnostic
OK/NOT OK
Counters
For every element two set of counters are available (Partial counters and Total counters); the partial
counters can be cleared by the user level, while the Total counter reset can be achieved with pass-
word (Session Level 1).
Every partial counter is reset to zero when ten thousand count is passed.
All partial counters can be cleared by means a single command; for this purpose the Reset partial
counters command must be issued (
Commands \ Reset
submenu).
27 - Counters
27V1 - Counters
59 - Counters
59V2 - Counters
59Uavg - Counters
81O - Counters
81U - Counters
81R - Counters
74TCS - Counters
CB - Counters
BF - Counters
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