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Elförsörjning till restaurangvagnarna (Elektrifiering/elektrisk drift)

av Per Ljungberg, Sunday, December 25, 2011, 20:29 (4728 dagar sedan) @ Bertil Bengtsson

Att "skruva upp" innebär att man ställer upp överströmsskyddet så att det klarar en högre ström. Detta måste ske med beaktande av kabelareor och kortslutningseffekt mm så att skyddet med säkerhet "löser ut" vid överbelastning eller kortslutning. Man strävar ju alltid att hålla ned skadeverkningarna så att skydden kanske var nedställda "onödigt" lågt.
PLj

Hela tråden:

 

Time: 273
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Time: 1120
SELECT COUNT(*) FROM mlf2_entries LEFT JOIN mlf2_akismet_rating ON mlf2_akismet_rating.eid = mlf2_entries.id LEFT JOIN mlf2_b8_rating ON mlf2_b8_rating.eid = mlf2_entries.id WHERE (mlf2_akismet_rating.spam = 1 OR mlf2_b8_rating.spam = 1)
Time: 1259
SELECT COUNT(*) FROM mlf2_entries LEFT JOIN mlf2_akismet_rating ON mlf2_akismet_rating.eid = mlf2_entries.id LEFT JOIN mlf2_b8_rating ON mlf2_b8_rating.eid = mlf2_entries.id WHERE category IN (0, 4, 5, 6, 7, 8, 9, 25, 14, 23, 19, 22, 24, 10, 21, 11, 12, 13, 15, 16, 26, 18, 20, 27) AND (mlf2_akismet_rating.spam = 0 AND mlf2_b8_rating.spam = 0)

Total time: 2663