Siemens UL489 Quick Start Manual page 11

ETU 727 BASIC TRIP UNIT
Adjustable long-time protection with delay fixed at 10s
Adjustable short-time protection and delay
Fixed instantaneous protection
Adjustable ground fault protection and delay, trip only
ETU745 STANDARD TRIP UNIT
Adjustable long-time protection and selectable I
Adjustable short-time protection and delay
Adjustable instantaneous protection
Optional ground fault module with trip and alarm (or alarm only)
Optional high contract LCD display with viewing angle adjustment
Modbus or Profibus communications interface
Thermal memory
ETU748 STANDARD TRIP UNIT
Identical to ETU745 without instantaneous protection
ETU776 ADVANCED TRIP UNIT
Same features as ETU745 Plus:
High contrast background-lit graphical display for display of all parameters and
event/curve characteristics
Storage of events and waveform buffers
Entry of all parameters by keypad entry, BDA/BDA Plus, or Profibus/Modbus
communications interface
Dynamic arc flash sentry (two protective parameter sets)
ETU755 ADVANCED TRIP UNIT
Same features as ETU776 except there is no display and parameters must be set with
BDA/BDA Plus, or Profibus/Modbus communications interface
2 4
T and I T delay
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