|
|
发表于 2015-6-5 10:47:35
|
显示全部楼层
The impedances required in ETAP Transformer Editor are test data (or short-circuit; c% h3 v$ L" V4 t& q; ^& d0 W/ \
impedances) given by manufacturer. They are NOT THE EQUIVALENT Delta-circuit
* q$ d' X5 @% `$ V4 G8 H* Eimpedances of transformer. These values can be converted to the individual winding
2 o+ I5 u8 Q/ W+ @8 }impedances or the equivalent Y-circuit impedances using the following formulas:
1 H! B# W R6 bZp = 0.5 (Zps + Zpt – Zst)1 N1 ]# N# K) W( Y, p" O
Zs = 0.5 (Zps + Zst – Zpt)6 z6 J8 P6 O4 c
Zt = 0.5 (Zpt + Zst – Zps)
: p1 O0 s4 f6 w4 c9 D; V) {! wTo obtain the equivalent Delta-circuit impedances the Y to D-circuit transformation" ]" ~" i, }$ s* ?+ o% _) L0 P. j
formula is as follows:$ c/ ?- w7 O. T% V, v- `
ZPS = (ZpZs + ZpZt + ZsZt)/Zt+ Q* }2 |. Y* s: J4 L- _
ZPT = (ZpZs + ZpZt + ZsZt)/Zs; a3 K) t6 Z$ m2 [, u
ZST = (ZpZs + ZpZt + ZsZt)/Zp |
评分
-
查看全部评分
|
赣公网安备36040302000210号 )|网站地图
狗仔卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡