Siemens WL Series Operating Instructions Manual page 347

WL Circuit Breaker
Function Overview of the Electronic Trip Units
Basic Functions
Parameter sets
Selectable between
parameter set A and B
LCD
LCD, alphanumeric (4-line)
LCD, graphic
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 trip
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
ETU725 ETU727
– –
– –
– –
– –
– –
– –
✔ ✔
✔ ✔
✔ ✔
✔ ✔
✔ ✔
✔ ✔
✔
–
✔
–
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
ETU745
–
O
–
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
(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
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