1MRS 751107-MUM
Protection Relay
Operator’s Manual
REX 521
27
4. 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
(see “Related
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.
4.1.
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.
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.
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.
4.2.
IRF test
The IRF relay may be tested by activating the IRF relay in the menu
Main menu\Tests\General\Activate IRF
.
InpSt
D9 ... D1
Input states
= 000000000
OutpSt
HSPO1, PO3, PO2, PO1, SO2, SO1
Output states
= 000000
!
Содержание REX 521
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