Siemens WL - Page 41

WL Circuit Breaker
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WL Selection and Application Guide • 2005
Technical Data
WL Circuit Breaker
Function Overview of the Electronic Trip Units
Basic Functions ETU725 ETU727 ETU745
Parameter sets
Selectable between
parameter set A and B – – –
LCD
LCD, alphanumeric (4-line) – –
O
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 – ✔✔
(only with ground fault module)
G alarm – – ✔ (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 OFF/ON – – ✔
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)
Ground fault alarm – – ✔ (only with ground fault module)
Auxiliary relay – – ✔
ETU error – – ✔
✔ available
– not available
O optional
from … to step from … to step
0… 1 0.1 1000… 1600 50
1… 100 1 1600… 10000 100
100… 500 5 10000… max 1000
500… 1000 10
Step for Settings via Communications or ETU Key Pad
Setting range of the I
g
Frame Size II Frame Size III
A 100A 400A
B 300A 600A
C 600A 800A
D 900A 1000A
E 1200A 1200A
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