25 – 7
Function Overview of the Electronic Trip Units
Basic Functions
ETU725
ETU727
ETU745
Long-time overcurrent protection
✔
✔
✔
Function can be switched ON/OFF
–
–
–
Setting range
IR = In x …
0.4, 0.45, 0.5, 0.55,
0.4, 0.45, 0.5, 0.55,
0.4, 0.45, 0.5, 0.55, 0.6,
0.6, 0.65, 0.7, 0.8,
0.6, 0.65, 0.7, 0.8,
0.65, 0.7, 0.8, 0.9, 1
0.9, 1
0.9, 1
Switch-selectable overload protection
(
I2t or I4t dependent function)
–
–
✔
Setting range of time delay class
tR at I
2t
(seconds)
10s, fixed at 6 x
Ir
10s, fixed at 6 x
Ir
2, 3.5, 5.5, 8, 10,
14, 17, 21, 25, 30
Setting range of time delay
tR at I
4t
(seconds)
–
–
1, 2, 3, 4, 5
Thermal memory
–
–
✔
(via slide switch)
Phase loss sensitivity
at
tsd=20ms (M)
at
tsd=20ms (M)
at
tsd=20ms (M)
N-conductor protection
–
✔
✔
Function can be switched ON/OFF
–
✔
(via slide switch)
✔
(via slide switch)
N-conductor setting range
IN = In x …
–
1
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,
1.25, 1.5, 2, 2.5,
1.25, 1.5, 2, 2.5,
3, 4, 6, 8, 10, 12
3, 4, 6, 8, 10, 12
3, 4, 6, 8, 10, 12
Setting range of time delay
tsd, fixed
(seconds)
0, 0.02 (M), 0.1,
0, 0.02 (M), 0.1,
0.02 (M), 0.1, 0.2,
0.2, 0.3, 0.4
0.2, 0.3, 0.4
0.3, 0.4, OFF
Switch-selectable short-time delay
short-circuit protection
(
I2t dependent function)
– fixed only
– fixed only
✔
(via rotary switch)
Setting range of time delay
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 switch)
Setting range
Ii = In x …
Ii = 0.8 x Icw
Ii = 0.8 x Icw
1.5, 2.2, 3, 4, 6, 8, 10, 12
50kA max
50kA max
0.8 x
I
cw
= max, OFF=
I
cw
=EIP
Ground fault protection
–
✔
(standard)
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
–
A, B, C, D, E
A, B, C, D, E
Setting range of the
Ig for alarm
–
–
A, B, C, D, E
Setting range of the time delay
tg
(seconds)
–
0.1, 0.2, 0.3, 0.4, 0.5
0.1, 0.2, 0.3, 0.4, 0.5
Switch-selectable
ground fault protection
(
I2t / fixed)
–
–
✔
Setting range time delay
tg at I
2t
–
–
0.1, 0.2, 0.3, 0.4, 0.5
ZSI ground function
–
–
per CubicleBUS module
✔
available
– not
available
O
optional
L
N
S
I
G
Extended Instantaneous Protection (EIP) allows the WL breaker to be applied at the withstand rating
of the breaker with minus 0% tolerance; that means no instantaneous override whatsoever. EIP further
enables the circuit breaker to be applied up to the full instantaneous rating of the breaker on systems
where the available fault current exceeds the withstand rating.
Ground Fault Module cannot be removed after installation.
1
2
In
2
1
Содержание WL Series
Страница 64: ...7 2 Horizontalanschlüsse 0733_nu top view Horizontal connectors ...
Страница 65: ...7 3 Vertikalanschlüsse 0734_nu top view rear view Rear vertical connectors ...
Страница 66: ...7 4 Frontanschlüsse 0736_nu front view top view Front connectors ...
Страница 68: ...7 6 7 2 Baugröße II Festeinbau 0494 3_nu 7 2 Frame size II fixed mounted version ...
Страница 69: ...7 7 C class always 0494 5_nu top view rear view ...
Страница 70: ...7 8 0738_nu LH side view front view ...
Страница 71: ...7 9 7 3 Baugröße III Festeinbau 0495 1_nu LH side view 7 3 Frame size III fixed mounted version ...
Страница 72: ...7 10 0495 2_nu top view top view ...
Страница 73: ...7 11 0495 3_nu top view rear view ...
Страница 74: ...7 12 0739_nu LH side view front view ...
Страница 76: ...7 14 Baugröße II III 0496_nu Frame size II III ...
Страница 77: ...7 15 7 5 Baugröße I Einschubausführung 0745_nu 7 5 Frame size I draw out version ...
Страница 78: ...7 16 0746_nu rear view top view ...
Страница 79: ...7 17 0747_nu bottom view ...
Страница 80: ...7 18 0748_nu ...
Страница 81: ...7 19 0749_nu ...
Страница 82: ...7 20 7 6 Baugröße II Einschubausführung 0490 1_ul 7 6 Frame size II draw out version ...
Страница 86: ...7 24 7 7 Baugröße III Einschubausführung 7 7 Frame size III draw out version ...
Страница 87: ...7 25 ...
Страница 88: ...7 26 ...
Страница 111: ...9 11 I Auslösung Erdschlussauslösung I tripping Ground fault tripping ...
Страница 289: ...17 4 1 Selbstschneidende Schraube 2 Bowdenzug 3 1 PZ 3 5 Nm 2 2 3 5 6 1 Self tapping screw 2 Bowden wire 4 9 7 8 ...
Страница 360: ......
Страница 361: ......