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1MRS 752179-MUM
5.2.2.
5.2.3.
5.3.
Earth-Fault Relay
Operator's Manual
The table below shows the activation order and the corresponding digit flashing
when a signal is being tested.
Table 5.2.1-1
Function test
Number
Function
1
I
>
0
2
t
>
0
3
I
>>
0
4
t
>>
0
0
IRF
Binary input test
To monitor the status of the binary input, navigate in the HMI menu as follows:
1. Select "FUNCTION TEST/BI" under "CONFIGURATION" in the main menu.
2. Select "BI STATUS" and the state of the binary input will be shown.
It is also possible to read the state of the binary input via SPA parameter I2.
LED test
The LED test is accessible via "FUNCTION TEST/BI" under
"CONFIGURATION" in the HMI menu. All the LEDs not already lit can be lit in
the test mode.
1. Enter the test mode by pressing the [E] button and the text "LED-TEST" will be
flashed on the display.
2. To activate the LEDs not already lit, press the [E] button. The LEDs will remain
lit for as long as the [E] button remains pressed.
3. To quit the test mode, press the [C] button.
The LED test can also be performed using SPA parameter V166.
Secondary injection testing
When the auxiliary voltage is connected to the protection relay, it will perform a
self-testing program. This, however, does not include the matching transformers and
the output contacts. The operational condition of the relay is tested by means of
ordinary relay test equipment. Such a test also includes the matching transformers,
output contacts and the accuracy of the operate values.
According to the manufacturer's recommendations, the relay should be submitted to
secondary testing at five years' intervals to ensure proper operation. The testing
should include the entire protection chain from the measuring transformers and
should always be performed in accordance with national regulations and
instructions.
The secondary testing described in this manual is based on the relay's setting values
during normal operation. (If necessary, the secondary testing can be extended by
testing the protection stages throughout their setting ranges.)
All setting values to be altered during the test procedure have to be read and stored
prior to the tests.
REJ 521
27
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