Areva MiCOM P441, Technical Manual

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P44x/EN CM/E33 Commissioning
Page 12/54 MiCOM P441/P442 & P444
Testing the user-programmable leds
To test the user-programmable LEDs set cell [0F10: COMMISSIONING TESTS, Test LEDs]
to ‘Apply Test’. Check that all 8 LEDs on the right-hand side of the relay illuminate.
4.2.6 Field Voltage Supply
The relay generates a field voltage of nominally 48V that should be used to energise the
opto-isolated inputs.
Measure the field voltage across the terminals given in table 4. Check that the field voltage
is present at each positive and negative terminal and that the polarity is correct.
Repeat for terminals 8 and 10.
Supply rail Terminals
P441 P442 P444
+48 Vdc F7 & F8 J7 & J8 N7 & N8
–48 Vdc F9 & F10 J9 & J10 N9 & N10
TABLE 4 - FIELD VOLTAGE TERMINALS
4.2.7 Input Opto-isolators
This test checks that all the opto-isolated inputs are functioning correctly. The P441 relays
have 8 opto-isolated inputs while P442 relays have 16 opto-isolated inputs and P444 relays
have 24 opto-isolated inputs.
The opto-isolated inputs should be energised one at a time. Ensuring correct polarity,
connect the field supply voltage to the appropriate terminals for the input being tested. The
opto-isolated input terminal allocations are given in table 5.
See hysteresis and settings about universal optos in chapter AP section 5.
NOTE: The opto-isolated inputs may be energised from an external 50V
battery in some installations. Check that this is not the case before
connecting the field voltage otherwise damage to the relay may result.
The status of each opto-isolated input can be viewed using cell [0020: SYSTEM DATA,
Opto I/P Status], a ‘1’ indicating an energised input and a ‘0’ indicating a de-energised input.
When each opto-isolated input is energised one of the characters on the bottom line of the
display will change to the value shown in table 5 to indicate the new state of the inputs.
Apply field voltage to terminals
P441 P442 P444
-ve +ve -ve +ve -ve +ve
Opto input 1 D1 D2 D1 D2 D1 D2
Opto input 2 D3 D4 D3 D4 D3 D4
Opto input 3 D5 D6 D5 D6 D5 D6
Opto input 4 D7 D8 D7 D8 D7 D8
Opto input 5 D9 D10 D9 D10 D9 D10
Opto input 6 D11 D12 D11 D12 D11 D12
Opto input 7 D13 D14 D13 D14 D13 D14
Opto input 8 D15 D16 D15 D16 D15 D16
Opto input 9 E1 E2 E1 E2
Opto input 10 E3 E4 E3 E4
Opto input 11 E5 E6 E5 E6