Commissioning
PRS-7367 331
"Healthy": indicates that the device is in normal operation, no software, hardware failure. When the
"healthy" light goes out, it indicates a serious problem with the device, resulting in the device not
functioning properly.
"Alarm": indicates that there are some alarm events on the device. On this condition, you can
analyze the cause of the alarm and how to handle it by checking the "supervision" section of the
manual.
The rest of the indicators are configurable indicators.
If the indicator of the device is set to the self-retaining state, if the signal is not reset before the
latest power-off, the signal will continue to be triggered when the device is powered on again, and
the indicator can be reset by resetting operation. It is likely that alarms related to voltage
transformer supervision will not reset at this stage.
10.6.3.1 Test the HEALTHY and ALARM LEDs
Apply the rated power supply and check that the “HEALTHY” LED is lighting in green. We need to
emphasize that the “HEALTHY” LED is always lighting in operation course except that this device
finds serious errors in it.
Produce one of the abnormal conditions listed in Chapter 4, the “ALARM” LED will light in yellow.
When abnormal condition reset, the “ALARM” LED extinguishes.
10.6.3.2 Test the Other LEDs
Test the other LEDs according to the configuration of the LEDs (through the PRS IED Studio
software). If the conditions which can turn on the selected LED are satisfied, the selected LED will
be on.
10.6.4 Test the AC Current Circuit
Attention! The wiring must be checked in strict accordance with the AC current connection
drawings provided.
The purpose of this test is to check whether the wiring of the AC circuit in the cubicle is correct and
whether the sampling precision meets the requirements. The sampling accuracy and polarity of
the device can be checked through sourcing rated AC current at the AC current input terminal on
the back of the cubicle.
Protection current measurement accuracy requirement shall be no higher than 1% or 0.02In.
However, an additional allowance must be made for the accuracy of the test equipment being
used.
Apply current equal to the current transformer secondary winding rating to each current
transformer input in turn, see the following table, checking the magnitude using a multimeter/test
set readout. The corresponding reading can then be checked in the relays menu.
Table 10.6-1 Current channel checkout
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