Siemens UL 1066 Operating Instructions Manual page 325

WL Circuit Breaker
Function overview of the electronic trip units
B s a c i F u n t c o i n s
Parameter sets
Selectable between
parameter set A and B
LCD
LCD, alphanumeric (4-line)
C L , D g a r p h
Communication
CubicleBUS integrated
Communication capability via
MODBUS or PROFIBUS
Metering function
Metering function capability with
Metering Function or
Metering Function PLUS
Display by LED
Trip unit active
Alarm
ETU error
L trip
S trip
I r t p i
N trip
G trip
G alarm
Tripped by extended protection or
protective relay function
Communication
Signal contacts with external CubicleBUS modules
(opto or relay)
Overcurrent warning
Load shedding OFF/ON
Early signal of long time trip (200ms)
Temperature alarm
Phase unbalance
Instantaneous trip
Short-time trip
Long-time trip
Neutral conductor trip
Ground fault protection trip
Ground fault alarm
Auxiliary relay
ETU error
Metering and Protective Relaying Accuracies
Protective Relaying Pick-up Accuracy
Phase Unbalance (I) 2% (5...50% I
Phase Unbalance (V) 2% (5...50% V
THD (I) +/- 3% (80...120% V
THD (V) +/- 3% (80...120% V
Overvoltage +/- 2% (80...120% V
Undervoltage +/- 2% (80...120% V
Under/Over Frequency +/- 0.1 Hz
E
–
O
c i –
-
-
Metering Values
) (I) at 1 x I
n
) (V) at 1 x V
n
(P) at 1x I
)
n
(S) at 1 x I
)
n
(Q) at 1 x I
)
n
)
n
T U 7 4 8
(only with ground fault module)
(only with ground fault module)
(only with ground fault module)
(only with ground fault module)
Accuracy
+/- 1%
n
+/- 0.5%
n
+/- 3%
n
+/- 2%
n
+/- 3%
n
E T U 7 7 6
–
(only with ground fault module)
(only with ground fault module)
(only with ground fault module)
(only with ground fault module)
available
– not available
optional
O
24 – 10