标题: 电气间隙的确定 [打印本页] 作者: 月人水 时间: 2009-2-28 14:02 标题: 电气间隙的确定 关于95和65的电气间隙,要不要使用内差法来确定?如果使用,那附件距离还要不要加上?作者: AlexLuo 时间: 2009-3-1 17:42
60950的Clearance是不用内插法的。作者: pater2730 时间: 2009-3-2 10:24
這里第一版標準和第二版標準在Clearance上的算法有很大的不同,舊標準一般不用內差法即可,但新標準是需要的 請見下面此處的對比:( S/ r0 J0 ?% |& ]( Z' E2 V: D8 o8 |
For PRIMARY CIRCUITS operating on nominal AC MAINS SUPPLY voltages up to 300 V, if the PEAK WORKING$ L- g! n( r) c& g7 E9 p. G
VOLTAGE in the circuit exceeds the peak value of the AC MAINS SUPPLY voltage, the minimum& e2 N3 k9 {% Y
CLEARANCE for the insulation under consideration is the sum of the following two values: , C$ q; n E i1 }– the minimum CLEARANCE value from table 2H for a WORKING VOLTAGE equal to the AC2 u/ m8 ]2 F) Y5 R9 J
MAINS SUPPLY voltage; and h9 V5 M/ ?9 X1 d, e( P6 B– the appropriate additional CLEARANCE value from table 2J. ! G5 P5 E ~6 q; A9 t(舊標準) * d2 G( a! H7 d/ Y. _3 E' @# gFor an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak): " r# |. A; M4 g7 y' n [3 Ia) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY4 h( b0 j) Z) r( b
voltage, minimum CLEARANCES are determined from Table 2K;( Z( s( n4 L2 O# _/ L
b) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage, * N, w, S: G# Kthe minimum CLEARANCE is the sum of the following two values:4 B& W! n6 P) l" h8 K s% u* U
• the minimum CLEARANCE from Table 2K; and , L; @0 V4 K. X/ L• the appropriate additional CLEARANCE from Table 2L ! Z. w& v+ l$ b(新標準)7 E) x9 U. A! c( W. K
所以Clearance相對新標準嚴苛些了.作者: pater2730 时间: 2009-3-2 10:24
我剛剛說的是60950-1新舊標準作者: junpi 时间: 2009-3-2 16:04
60065和60950里面考虑电气间隙的时候不需要使用内差法,直接用主表格值加上附加表格的值