L2234
Emax
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Model
Scale
Page No.
Doc. No.
Apparatus
1SDH000460R0002
L2778
16.6.2 Putting into service
The PR122/P LSIRc unit comes already configured.
However, when a PR122/P LSIG or PR123/P LSIG units are used, follow the directions below to update the unit:
1. Disconnect all power supplies;
2. Replace the rating plug with one supplied by SACE for Rc application;
3. Install the toroid on the busbars as shown in the 1SDH000601R0001 document;
4. Connect the toroid to the release as per the wiring diagram on page 153;
5. Power the unit through PR030/B and proceed to installation according to the following path: settings, CB, earth protection, external toroid,
RC. Confirm the changes;
6. Check that no failures are indicated;
7. Set threshold and times of Rc protection;
8. Conduct an Rc test, see par. 16.6.3; check for correct operation.
16.6.3 Rc test menu
The test page of Rc protection can be accessed by pressing the “iTest” key for 7 seconds, or else the Rc test page can be reached through
the following path: test; Rc (Idn). Rc test screen will be displayed; press the “iTest” key again to test.
A successful result will be proved by CB opening within the times previously set.
In the event of a fault related to the connections between toroid and protection unit, the wording: GText sensor, will be
displayed.
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