Areva MiCOM P441, Technical Manual

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P44x/EN CM/E33 Commissioning
Page 36/54 MiCOM P441/P442 & P444
Put into service the weak infeed mode (Possibility of Single pole except for P441) ;
1. Inhibit tripping authorisation and phase selection.
2. Activate the teleaction input.
3. Check :
- the teleaction transmission signal is activated;
- the tripping contact is not activated.
From MiCOM S1, validate the three-phase authorisation.
FIGURE 21
1. Activate the teleaction input.
2. Check:
- the teleaction signal is activated ;
- the tripping contacts closing.
From MiCOM S1, validate the minimum voltage phase selection, set under voltage
threshold to 0,4 Vn, put VB = -VC = Vn, validate the single phase tripping
authorisation.
1. Activate the teleaction input.
2. Check :
- the teleaction transmission signal is activated;
- the protection trips the phase A single phase.
5.3.5 Protection function during fuse failure
See internal logic description in P44x /EN AP – item 4.2
Relay locking (1 or 2 phases loss)
1. Supply MiCOM P440 with a "healthy" network with charge:
2. Take off the A phase supply .((V0) & (/I0) creation)
3. Check :
- the fuse failure sign is activated at the end of the time delay sign;
- The protection starting and tripping sign are not activated.
Relay unlocking
1. Keep the A phase supply cut and make a fault (Single or two) of which the fault
current (IR>3I0) is superior to the programmed threshold.(I2 or I0)
2. Check the tripping contact is activated.
Relay locking (3 phases loss)
1. Repeat the 1 then open the 3 voltages channels without creating delta I. Check as in 3