9
WL 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
Selectable thermal memory
X
X
X
Zone selective interlocking
X
X
X
Selectable 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
protective setting capability
X
Dynamic arc-flash sentry (DAS)
X
Extended 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
Содержание ETU745
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