Siemens SENTRON 3WL Reference Manual page 33

3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)
Protection functions
Parameterization by
Functional overview of the solid-state release system
Overload protection
Function can be switched on/off
I I
Setting range = × ...
R n
Switchable overload protection
2 4
( I t- or I t-dependent function)
2
Setting range for time-lag class t at I t
R
4
I
Setting range for time-lag class t at t
R
Thermal image can be switched on/off
Phase failure sensitivity
Neutral conductor protection
Function can be switched on/off
I I
N conductor setting range = × ...
N n
Short-time delayed short-circuit protection
Function can be switched on/off
Setting range I = I × ...
sd n
t
Setting range for delay time
sd
Switchable short-time delayed short-circuit protection
2
( I t-dependent function)
2
I
Setting range for delay time t at t
sd
Zone Selective Interlocking function
Instantaneous short-circuit protection
Function can be switched on/off
Setting range I = I × ...
i n
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 cur-
rent formation with int. or ext. neutral conductor transformer
Detection of ground-fault current through external
current transformer
Setting range of the operating current I
I
Setting range of the operating current
Setting range of the delay time t
g
Switchable ground-fault protection characteristic curve
2
I
( t-dependent function)
2
Setting range for delay time t at I t
g
Zone Selective Interlocking ground-fault protect. function
Parameter set switchover
Switchable between parameter set A and B
LCD
Alphanumeric LCD (4-line)
Graphical LCD (24 V, external 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
G-release
G-alarm
Release through extended protection functions
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
Ground-fault protection release
Ground-fault alarm
Auxiliary relay
ETU fault
Setting range of the operating current I
Size I and size II Size III
A 100 A 400 A
B 300 A 600 A
C 600 A 800 A
D 900 A 1000 A
E 1200 A 1200 A
ETU45B
D & S
✓
--
0.4-0.45-0.5-0.55-0.6-
0.65-0.7-0.8-0.9-1
✓
2-3.5-5.5-8-10-14-17-21-25-30 s
1-2-3-4-5 s
✓
At t = 20 ms (M)
sd
✓
✓
0.5 ... 1
✓
✓
1.25-1.5-2-2.5-3-4-6-8-10-12
M-100-200-300-400 ms
✓
100-200-300-400 ms
By CubicleBUS-Modul
✓
✓
1.5-2.2-3-4-6-8-10-12-0.8 x I
❑ Module can be retrofitted
✓
✓
--
✓
✓
for release A-B-C-D-E
g
for alarm A-B-C-D-E
g
100-200-300-400-500 ms
✓
100-200-300-400-500 ms
By CubicleBUS-Modul
--
❑
--
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓ (only with ground-fault prot. module)
✓ (only with ground-fault prot. module)
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓ (only with ground-fault prot. module)
✓ (only with ground-fault prot. module)
✓
✓
Increment size for adjustment of M
g
From ... to Increment
size
0 ... 1 0.1
1 ... 100 1
100 ... 500 5
500 ... 1000 10
3WL Air Circuit Breakers
ETU76B
M/K
✓
✓
0.4 ... 1
✓
2 ... 30 s
1 ... 5 s
✓
✓ (on/off)
✓
✓
0.2 ... 2
✓
✓
×
1.25 I ... 0.8 × I
n cw
M-80 ... 4000 ms
✓
100 ... 400 ms
By CubicleBUS-Modul
✓
✓
1.5 × I ... 0.8 × I
cs n cs
❑ Module can be retrofitted
✓
✓
✓
✓
✓
A ... E
A ... E
100 ... 500 ms
✓
100 ... 500 ms
By CubicleBUS-Modul
✓
--
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓ (only with ground-fault prot. module)
✓ (only with ground-fault prot. module)
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓ (only with ground-fault prot. module)
✓ (only with ground-fault prot. module)
✓
✓
From ... to Increment
size
1000 ... 1600 50
1600 ... 10000 100
10000 ... max 1000
General data
For continuation of legend
see page 32.
Siemens · 2009 33