Siemens SENTRON 3WL - Testing the Time Lag Class; Testing the Thermal Memory

3WL Air Circuit Breakers
3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)
General data
14
Siemens · 2009
■ Function
ETU15B ETU25B ETU27B
Functions of the solid-state releases
Basic protection functions
Overload protection L ✔ ✔ ✔
Short-time delayed short-circuit protection S -- ✔✔
Instantaneous short-circuit protection I ✔ ✔ ✔
Neutral conductor protection N -- -- ✔
Ground-fault protection G -- -- ✔
Additional functions
N-conductor protection can be switched on/off -- -- ✔
N-conductor protection adjustable -- -- --
Instantaneous short-circuit protection can be switched on/off -- -- --
Non-delayed short-circuit protection can be switched on/off -- -- --
Thermal image can be switched on/off -- -- --
Load monitoring -- -- --
Short-time delayed short-circuit protection switchable to I
2
t -- -- --
Instantaneous short-circuit protection adjustable ✔ -- --
Overload protection switchable to I
4
t -- -- --
Overload protection can be switched on/off -- -- --
Selectable parameter sets -- -- --
Parameterization and display
Parameterization through rotary coding switches (10 steps) ✔ ✔ ✔
Parameterization through communication (absolute values) -- -- --
Parameterization through user interface of ETU (absolute values) -- -- --
Parameterization of the extended protection functions -- -- --
LCD alphanumerical -- -- --
Graphic LCD -- -- --
Measurement function
Measurement function Plus -- -- --
Communication
CubicleBUS -- -- --
Communication through PROFIBUS DP -- -- --
Communication through MODBUS -- -- --
Communication through Ethernet -- -- --
✔ Standard -- Not available ❑ Optional
Detailed information about the functions of the solid-state releases is given in the following.
R
i
N S E 0 _ 0 0 9 5 0 c
NSE0_00880b
R
s d
J
s d
N S E 0 _ 0 0 9 5 1 b
NSE0_00881b
R
s d
J
s d
g
J
g
N S E 0 _ 0 0 9 5 2 b
NSE0_00882b