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Communication-capable Circuit Breakers
2/6
WL Circuit Breaker
✔
available
– not available
O
optional
Basic Functions
ETU748
ETU755
ETU776
Parameter sets
Selectable between
parameter set A and B
–
✔
✔
LCD
LCD, alphanumeric (4-line)
O
–
–
LCD, graphic
–
–
✔
Communication
CubicleBUS integrated
✔
✔
✔
Communication capability via
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 trip
-
✔
✔
N trip
✔
✔
✔
G trip
✔
(only with ground fault module)
✔
(only with ground fault module)
✔
(only with ground fault module)
G alarm
✔
(only with ground fault module)
✔
(only with ground fault module)
✔
(only with ground fault module)
Tripped by extended protection or
protective relay function
✔
✔
✔
Communication
✔
✔
✔
Signal contacts with external CubicleBUS modules
(Opto or relay)
Overcurrent warning
✔
✔
✔
Load shedding ON/OFF
✔
✔
✔
Early signal of long-time trip (200 ms)
✔
✔
✔
Temperature alarm
✔
✔
✔
Phase unbalance
✔
✔
✔
Instantaneous trip
✔
✔
✔
Short-time trip
✔
✔
✔
Long-time trip
✔
✔
✔
Neutral conductor trip
✔
✔
✔
Ground fault protection trip
✔
(only with ground fault module)
✔
(only with ground fault module)
✔
(only with ground fault module)
Ground fault alarm
✔
(only with ground fault module)
✔
(only with ground fault module)
✔
(only with ground fault module)
Auxiliary relay
✔
✔
✔
ETU error
✔
✔
✔
WL PROFIBUS Communication and Electronic Accessories • July 2004