Test Mode; I/O Test; Irf Test - ABB REX 521 Operator's Manual

1MRS 751107-MUM
4.
4.1.
4.2.
Protection Relay
Operator's Manual

Test mode

Digital inputs, output relays and IRF relay may be tested by setting the parameter
Test mode to Testing in the menu Main menu\Tests\General.
When test mode is activated, the green READY indicator is blinking. For more
information, refer to Technical Reference Manual, General
documents" on page 6).
Test mode can be cancelled by setting the parameter to No test or by
disconnecting the power supply.
If the user does not cancel the test mode, it remains active and the Ready LED
remains blinking.

I/O test

The picture below shows the menu used for digital input testing (Tests\Inputs)
in the hardware variant with nine digital inputs. The digits correspond to the inputs
DI1...DI9, starting from the right side.
Input states
= 000000000
D9 ... D1
Fig. 4.1.-1 Digital input testing
The following picture shows the menu used for output relay testing
Tests\Outputs. Observe that the self-supervision relay is activated in another
menu and is thus not included in this menu. The relays are activated in the order: SO,
PO and HSPO, starting from the right side.
Output states
= 000000
HSPO1, PO3, PO2, PO1, SO2, SO1
Fig. 4.1.-2 Output relay testing
If the user forgets to cancel the test mode, it remains on and the Ready
!
LED indicator remains flashing.

IRF test

The IRF relay may be tested by activating the IRF relay in the menu
Main menu\Tests\General\Activate IRF.
REX 521
(see "Related
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