Siemens SENTRON 3WL Reference Manual page 32

3WL Air Circuit Breakers
3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)
General data
Protection functions
Parameterization by
Functional overview of the solid-state release system
Overload protection
Function can be switched on/off
Setting range
R L Switchable overload protection
2 4
I I
( t- or t-dependent function)
Setting range for time-lag class t
Setting range for time-lag class t
R
Thermal image can be switched on/off
Phase failure sensitivity
Neutral conductor protection
N
Function can be switched on/off
N conductor setting range
Short-time delayed short-circuit protection
Function can be switched on/off
Setting range
s d
S
Setting range for delay time t
Switchable short-time delayed short-circuit protection
s d
2
( I t-dependent function)
Setting range for delay time t
Zone Selective Interlocking function
i
Instantaneous short-circuit protection
I
N S E 0 _ 0 0 8 8 8 b Function can be switched on/off
Setting range
Ground-fault protection
Tripping and alarm function
Tripping function can be switched on/off
Alarm function can be switched on/off
Detection of the ground-fault current through summation
current formation with internal or external neutral con-
g
ductor transformer
G
Detection of ground-fault current through external
current transformer
g
Setting range of the operating current
Setting range of the operating current
N S E 0 _ 0 0 8 8 9 a
Setting range of the delay time
Switchable ground-fault protection characteristic
2
I
curve ( t-dependent function)
Setting range for delay time t
Zone Selective Interlocking ground-fault protect. func. --
Parameter set switchover
Switchable between parameter set A and B
LCD
Alphanumeric LCD (4-line)
Graphical LCD (24 V, ext. power supply required)
Communication
CubicleBUS integrated
Communication-capable through PROFIBUS DP
Measurement function
Measurement-function capable with measurement
function Plus
LED display
Solid-state release active
Alarm
ETU fault
L-release
S-release
I-release
N-release
NSE00890
G-release
G-alarm
Release through extended protection function
Communication
Signals from signal switches with external CubicleBUS modules (relays)
Overload warning
Load shedding, load receiving
Leading signal overload trip 200 ms
Temperature alarm
Phase unbalance
Instantaneous short-circuit release
Short-time delayed short-circuit release
Overload trip
Neutral conductor release
NSE00891
Ground-fault protection release
Ground-fault alarm
Auxiliary relay
ETU fault
Delay time figures given in ms.
M = Motor protection, corresponds to 20 ms.
D = Rotary coding switch
D & S = Rotary coding and slide switch
K = Communication
M/K = Menu/communication
32 Siemens · 2009
I = I × ...
R n
2
at I t
R
4
at I t
R
I = I × ...
N n
I = I × ...
sd n
sd
2
at I t
sd
I = I × ...
i n
I for release
g
I for alarm
g
t
g
2
at I t
g
✓ Available
-- Not available
❑
Optional
ETU15B ETU25B
D D
✓ ✓
-- --
0.5-0.55-0.6-0.65-0.7- 0.4-0.45-0.5-0.55-0.6-
0.75-0.8-0.85-0.9-1 0.65-0.7-0.8-0.9-1
-- --
10 s fixed 10 s fixed
-- --
-- --
-- at t = 20 ms (M)
sd
-- --
-- --
-- --
✓
--
-- --
-- 1.25-1.5-2-2.5-3-4-6-8-10-12
-- 0-M-100-200-300-400 ms
-- --
-- --
-- --
✓ ✓
-- --
≥
20 ×
2-3-4-5-6-7-8 Fixed for I
i
kA
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
--
-- --
-- --
-- --
-- --
-- --
-- --
✓ ✓
✓ ✓
✓ ✓
✓
--
✓
--
✓
--
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
For the setting range of the operating current I
ETU27B
D & S
✓
--
0.4-0.45-0.5-0.55-0.6-
0.65-0.7-0.8-0.9-1
--
10 s fixed
--
--
at t = 20 ms (M)
sd
✓
✓
1
✓
--
1.25-1.5-2-2.5-3-4-6-8-10-12
0-M-100-200-300-400 ms
--
--
--
✓
--
≥
20 ×
I , max. 50 Fixed for I I , max. 50
n i n
kA
✓ Fixed mounted
--
✓
--
✓
--
A-B-C-D-E
--
100-200-300-400-500 ms
--
--
--
--
--
--
--
--
--
✓
✓
✓
✓
✓
✓
✓
✓
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
see page 33.
g