Etu Models And Features - Siemens WL Series Selection And Application Manuallines

Low Voltage Circuit Breaker
Electronic trip units (ETU)

ETU models and features

Features and characteristics
Long-time overcurrent protection (L)
Short-time delayed overcurrent protection (S)
Instantaneous overcurrent protection (I)
Neutral conductor protection (N)
Ground fault protection (G)
Selectable neutral protection
Defeatable short-time protection
Defeatable instantaneous protection
Selectable thermal memory
Zone selective interlocking
2
Selectable I t or fixed short-time delay
Adjustable instantaneous pick-up
2 4
Selectable I t or I t long-time delay
Adjustable short-time delay and pick-up
Selectable and adjustable neutral protection
Dual protective setting capability
Dynamic arc-flash sentry (DAS)
Extended instantaneous protection (EIP)
Parameterization by rotary switches
Parameterization by communication (absolute values)
Parameterization by menu/keypad (absolute values)
Remote parameterization of the alarm functions
Remote parameterization of the relay functions
Alphanumeric display
Graphical display
Power metering function
Communication via PROFIBUS-DP
Communication via the MODBUS
Communication via the Ethernet (BDA)
(X) = standard feature, (O) = optional feature
6
ETU745 ETU748
X X
X X
X
X X
O O
X X
X
X
X X
X X
X X
X X
X X
X X
X X
X X
X X
O O
O O
O O
O O
O O
ETU776
X
X
X
X
O
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
O
O
O
O
WL Circuit Breaker selection and application guide