Siemens ETU745 - ETU Models and Features

9WL Circuit Breaker Selection and Application Guide
WL Circuit Breaker
Electronic Trip Unit (ETU)
ETU models and features
Features and characteristics ETU745 ETU748 ETU776
Long-time overcurrent protection (L) X X X
Short-time delayed overcurrent protection (S) X X X
Instantaneous overcurrent protection (I) X X
Neutral conductor protection (N) X X X
Ground fault protection (G) O O O
Selectable neutral protection X X X
Defeatable short-time protection X X
Defeatable instantaneous protection X X
Select
able thermal memory
X X X
Zone selective interlocking X X X
Select
able I
2
t or fixed short-time delay X X X
Adjustable instantaneous pick-up X X X
Selectable I
2
t or I
4
t long-time delay X X X
Adjustable short-time delay and pick-up X X X
Selectable and adjustable neutral protection X X X
Dual pr
otective setting capability X
Dynamic arc-flash sentry (DAS) X
Ext
ended instantaneous protection (EIP)
X X X
Parameterization by rotary switches X X
Parameterization by communication (absolute values) X
Parameterization by menu/keypad (absolute values) X
Remote parameterization of the alarm functions X
Remote parameterization of the relay functions X
Alphanumeric display O O X
Graphical display X
Power metering function O O O
Communication via PROFIBUS-DP O O O
Communication via the MODBUS O O O
Communication via the Ethernet (BDA) O O O
(X) = standard feature, (O) = optional feature
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