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1MRS 755310
4.1.10.
4.1.11.
4.1.11.1.
4.1.11.2.
Feeder Protection Relay
Technical Reference Manual
minute. This value is updated at the expiration of each time range. The third value
shows the highest one-minute average current value measured during the previous
time range. However, if the time range is set to zero, only the one-minute and the
maximum demand value will be shown. The maximum value is the highest
one-minute mean value since the last reset.
The demand values can be set to zero through serial communication using SPA
parameter V102. The demand values will also be reset if SPA parameter V105 is
changed or the relay is reset.
Commissioning tests
The following two product functions can be used during the commissioning of the
relay: function test and digital input test.
The function test is used for testing the configuration as well as the connections from
the relay. By selecting this test, the internal signals from the protection stages, the
external trip signal and the IRF function can be activated one by one. Provided that
the signals have been set to be routed to the output contacts (PO1...PO3 and
SO1...SO5) with the switches of SGR1...8, the output contacts will be activated and
their corresponding event codes generated when the test is run. However, activation
of the internal signals from the protection stages, the signals from the auto-reclose
function, the external trip signal and the IRF function will not generate an event
code.
The digital input test is used for testing the connections to the relay. The state of the
digital inputs can be monitored via the HMI.
Refer to the Operator's Manual for instructions on how to perform the tests.
Disturbance recorder
Function
REF 610 features an integrated disturbance recorder for recording monitored
quantities. The recorder continuously captures the curve forms of the currents as
well as the status of both internal and digital input signals and stores these in the
memory.
Triggering of the recorder will generate an event code. After the recorder has been
triggered, it will continue to record data for a pre-defined post-triggering time. An
asterisk will be shown on the LCD on completion of the recording. The status of the
recording can also be viewed using SPA parameter V246.
As soon as the recorder has been triggered and the recording has finished, the
recording can be uploaded and analysed by means of a PC provided with a special
program.
Disturbance recorder data
One recording contains data from the four analogue channels and up to eight digital
channels. The analogue channels, whose data is stored either as RMS curves or as
momentary measured values, are the currents measured by the relay. The digital
REF 610
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