1MRS751802-MUM
REX 521
139
Protection Relay
Technical Reference Manual, Standard Configurations
As the HSPO1 is always routed to the “Trip 1” output signal, the settings are made
directly in Main menu\Configuration\Output SWGRP\Trip 1 where
the checksum for the settings is displayed (255 by default).
Using HMI:
To change the settings for the Trip 1, go to Configuration\Output
SWGRP\Trip 1 and press the [E]-button. The different protection functions are
displayed one at a time. By pressing the [
→ ] or [← ] navigation push button, it is
possible to scroll between the different protections. By pressing the [
↑ ] or [↓ ]
navigation push button, the specific protection function trip signal can be connected
or disconnected. When the two-stage overcurrent (3I> and 3I>>>), two-stage earth
fault (Io> and Io>>), the unbalance and thermal overload protection are selected, the
checksum for the Trip 1 is 221.
Using Relay Setting Tool:
To change the settings for the Trip 1, go to the Configuration in config view
and Output SWGRP and select the “New value” on Trip 1. Press backspace to
change the value. In the “New value” window the protection functions that are used
can be marked or unmarked. The checksum can also be changed directly. Finally,
the new setting has to be sent to the relay with the Download button. For more
information about the tool, refer to
Tools for Relays and Terminals, User’s Guide
(see Section 1.5. Related documents).
RSTTrip1
Fig. 9.1.4.1.-1 Changing the checksum value for the Trip 1 in the
Relay Setting Tool
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