Areva MiCOM P441, Technical Manual

Page: 49 / 636

Update Documentation P44x/EN AD/E44
MiCOM P441, P442 & P444
Page 31/82
2.9.3 Weak Infeed Features :
2.9.3.3 PAP – Weak infeed for RTE application (PAP= Protection Antenne Passive)
That specific request from RTE is an exclusive choice with the export Weak infeed logic:
If the PAP has been selected then the following settings are activated with MiCOM S1:
For internal logic description , check the RTE manual ref P440 user guide EF GS
2.12.2 TOR-SOTF Trip Logic
During the TOR/SOTF 500ms window (or close pulse time/reclaim time), individual distance
protection zones can be enabled or disabled by means of the TOR-SOTF Mode function
links (TOR logic bit0 to bit3 & SOTF logic bit7 to bit 0B)
2.13.2 Unblocking of the relay for faults during Power swings
The relay can operate normally for any fault occurring during a power swing, as there are
three selectable conditions which can unblock the relay:
•
A biased residual current threshold is exceeded - this allows tripping for earth faults
occurring during a power swing. The bias is set as: Ir> (as a percentage of the
highest measured current on any phase), with the threshold always subject to a
minimum of 0.1 x In. Thus the residual current threshold is:
IN > 0.1 In + ((IN> / 100) . (I maximum)).
•
A biased negative sequence current threshold is exceeded - this allows tripping for
phase-phase faults occurring during a power swing. The bias is set as: I
2
> (as a
percentage of the highest measured current on any phase), with the threshold always
subject to a minimum of 0.1 x In. Thus the negative sequence current threshold is:
I
2
> 0.1 In + ((I
2
> / 100) . (I maximum)).
A phase current threshold is exceeded - this allows tripping for three-phase faults occurring
during a power swing. The threshold is set as: Imax line> (in A).
A Criteria in Delta Current can be activated in MiCOM S1 since version C1.0: