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27 – 7
WL Circuit Break er
Function ov erview of the electronic trip units
Basic Functions
ETU745
Long-time overcurrent protection
Function can be switched ON/OFF
–
Setting range
IR = In x …
0.4, 0.45, 0.5, 0.55, 0.6,
0.65, 0.7, 0.8, 0.9, 1
Switch-selectable overload protection
(
I2t or I4t dependent function)
Setting range of
time
delay class
tR at I
2t
(seconds)
2, 3.5, 5.5, 8, 10,
14, 17, 21, 25, 30
Setting range of
tR at I
4t
(seconds)
1, 2, 3, 4, 5
Thermal memor
(via (on/off via key pad or communications)
(on/off via key pad or communications)
slide switch)
Phase loss sensitivity
at tsd=20ms (M)
N-conductor protection
Function can be switched ON/OFF
(via slide switch)
N-conductor setting range
IN = In x
0.5 … 1
Short-time delayed overcurrent protection
Function can be switched ON/OFF
(via rotary switch)
Setting range
Isd = In x …
1.25, 1.5, 2, 2.5,
3, 4, 6, 8, 10, 12
Setting range of
tsd, fixed
(seconds)
0.02 (M), 0.1, 0.2,
0.3, 0.4, OFF
Switch-selectable short-time delayed
short-circuit protection
(
I2t dependent function)
(via rotary coding switch)
Setting range of
tsd at I
2t
(seconds)
0.1, 0.2, 0.3, 0.4
Zone Selective Interlocking (ZSI) function
per CubicleBUS module
Instantaneous overcurrent protection
Function can be switched ON/OFF,
Extended Instantaneous Protection
is enabled when OFF
(via rotary coding switch)
Setting range
Ii = In x …
1.5, 2.2, 3, 4, 6, 8, 10, 12
0.8 x
I
cw
= max, OFF=
I
cw
=EIP
Ground fault protection
O
(field installable module)
Trip and alarm function
Detection of the ground fault current
by residual summing method
Detection of the ground fault current
by direct summing method
Setting range of the
Ig for trip
, B, C, D, E (100… 1200A)
Setting range of the
Ig for alarm
A,
A,
B, C, D, E (100… 1200A)
Setting range of the
tg
(seconds)
0.1, 0.2, 0.3, 0.4, 0.5
Switch-selectable
ground fault protection
(
I2t / fixed)
Setting range
tg at I
2t
0.1, 0.2, 0.3, 0.4, 0.5
ZSI ground function
per CubicleBUS module
L
N
S
I
G
3
In
2
time
delay
time
delay
time
delay
time
delay
time
delay
ETU776
–
40-100% of In (Adjustable in Amps )
2 … 30 (step: 0.1s)
1 … 5 (step: 0.1s)
(via key pad or communications)
(via key pad or communications)
(via key pad or communications)
(via key pad or communications)
(via key pad or communications)
0.5 … 2, OFF
1.25 … 0.8 x Icw = max
(step: 10A)
M, 0.08 … 0.4, OFF (step: 0.001s)
0.1 … 0.4 (step: 0.001s)
per CubicleBUS module
1.5 x
I
n
… 0.8 x
I
cs
= max, OFF=
I
cw
=EIP
O
(field installable module)
A … E (step: 1A)
A … E (step: 1A)
0.1 … 2.0 (step: 0.001s)
0.1 … 2.0 (step: 0.001s)
per CubicleBUS module
1
1
available
–
not available
O
optional
Extended Instantaneous Protection (EIP) allows the WL circuit breaker to be applied at the withstand rating of
the circuit breaker with minus 0% tolerance; this means there is no instantaneous override at all. EIP further
enables the circuit breaker to be applied up to the full instantaneous rating of the circuit breaker in systems
where the available fault current exceeds the withstand rating.
2
Note: ETU776 settings via communications: 10A steps for Instantaneous and Short Time pickup, all others 1A steps.
Via ETU Keypad: Below 1000A: 10A steps 1000A-1600A: 50A steps
1600A-10000A: 100A steps Above 10000A, 1000A steps
1
Notes:
M
= Motor protection setting indicates phase loss sensitivity is enabled. LT pick-up reduced 80% when phase unbalance > 50%. ST = 20 ms
Communications
= Setting the parameters of the trip unit via the Breaker Data Adapter, MODBUS, or PROFIBUS
Key pad
= Direct input
the trip unit
on
Содержание UL 489
Страница 36: ...5 21 Frame size II 3000 A Frame size III 1 Holes 14 mm 0720 1 0721_nu ...
Страница 63: ...7 2 Horizontal connectors 0733_nu top view ...
Страница 64: ...7 3 Rear vertical connectors 0734_nu top view rear view ...
Страница 65: ...7 4 Front connectors 0736_nu front view top view ...
Страница 66: ...7 5 Front connectors and pressure wire terminals 0737_nu top view front view ...
Страница 67: ...7 6 7 2 Frame size II fixed mounted version 0494 3_nu ...
Страница 68: ...7 7 Class C always 0494 5_nu top view rear view ...
Страница 69: ...7 8 2500 0738_nu LH side view front view ...
Страница 71: ...7 10 7 4 Frame size III fixed mounted version 0495 1_nu LH side view ...
Страница 72: ...7 11 0495 2_nu top view top view ...
Страница 73: ...7 12 0495 3_nu top view rear view ...
Страница 75: ...7 14 7 5 Door cut outs fixed mounted circuit breaker Frame size I 0735_nu ...
Страница 76: ...7 15 Frame size II III 0496_nu ...
Страница 77: ...7 16 7 6 Frame size I draw out version 0745_nu ...
Страница 78: ...7 17 0746_nu rear view top view ...
Страница 79: ...7 18 0747_nu bottom view ...
Страница 80: ...7 19 0748_nu ...
Страница 81: ...7 20 0749_nu ...
Страница 82: ...7 21 7 7 Frame size II draw out version 0490 1_ul ...
Страница 86: ...7 25 7 8 Frame size III draw out version ...
Страница 87: ...7 26 ...
Страница 88: ...7 27 ...
Страница 89: ...7 28 7 9 Door cut outs for draw out circuit breakers Frame size I 0750_nu ...
Страница 91: ...7 30 7 11 External sensor for neutral conductor WLNCT2 ...
Страница 92: ...7 31 WLNCT3 ...
Страница 107: ...9 5 I tripping Ground fault tripping ...
Страница 256: ...15 12 Installing FS II and FS III 1 Socket head cap screw M5 with washer and nut 1 2 3 4 6 5 7 8 Size 4 5 Nm 45 lb in ...
Страница 307: ...22 2 Installing the door sealing frame Not for use with fuse carriages Catalog No Door sealing frame WLDSF 1 2 3 ...
Страница 351: ......