1、 559502014 . ETSI EN 300 132-2 V2.4.6 (201112)(NEQ) 1 - -()2 4803 -242014.43-4 300132-2V2.4.6(201112).- () . 2: 48 ETSI EN 300 132-2 V2.4.6 (201112) Environmental Engineering (EE).Power supply interface at the input to telecommunications and information (ICT) equipment. Part 2: Operatedby48Vdirectcu
2、rrent(dc),NEQ5 1.02012 ( 8). (1), - . () - . , - -(gost.ru) ,2014,-II 5595020141 .12 13 , .23.1 23.2 .33.3 34 34.1 .34.2 A44.3 A44.4 - .54.5 A64.6 64.7 A64.8 -A.84.9 , -A.9() .11() 60 12() - 13() A15() .16III 559502014 . Power supply interface at the input to telecommunications equipment. Operated b
3、y direct current (dc) 201501011 , () . , :- ;- ;- , - . :- -, ;- , ;- , , , ; -, , , , , , . , - 20 . , - . MC, MC. 48 . . - 60 . - . - .2 : 51317.4.599 . . .1 559502014 - , 1 , - . - , , . , - , (). , , , , , . , -, , , .3 , , 3.1 :3.1.1 : , , .3.1.2 : , .3.1.3 A: , .1 . 1 A.2 A,.3.1.4 : , - 3.1.5
4、: , - 48 (, ) .3.1.6 (Im): , - A.3.1.7 : , .3.1.8 : , .3.1.9 : , - , - .3.1.10 : , .3.1.11 : , - .3.1.12 : A, , , ().3.1.13 : .3.1.14 : , - -. A A.2 5595020143.1.15 : -3.1.16 : ,-3.2 : AC (AlternatingCurrent)DC (DirectCurrent) .RMS (rootmeansquare) .3.3 :It Im L R T Zc Zm 4 ,A1,-.() -.,A,A.1 A4.1 A
5、48 (). A -24-.3 5595020144.2 A 48 A 40,5 57,0 - . .4.3 A4.3.1 , 48 , : 0,0 40,5 57,0 60,0 A - . . - , - , , , 40,5 .4.3.2 : , , - , 1. 1 , , , 40,5 60,0 60,0 40,50,1 1 50 100 - 57,0 0 0 57,00,1 , - (, 1 2), : - .4.3.3 4.3.3.1 A, (-, ) . : 0 40,5 , - , A .4.3.3.2 - - , , , 51317.4.5. 1,2 -/50 - - 8 -/20 - .