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Two Winding Off-load Tap Change Power Transformer

Rated Power （kVA）	Voltage Combination		Vector Group	Loss（kW）		No-load Current(%)	Impedance (%)
Rated Power （kVA）	Primary Voltage	Secondary Voltage	Vector Group	No load	Load	No-load Current(%)	Impedance (%)
31500	220±22.5% 242±22.5%	6.3 6.6 10.5 11	YNd11	24	128	0.7	13
40000				30	140	0.7	13
50000				37	175	0.5	13
63000				45	230	0.5	13.5
75000		10.5 11 13.8		50	268	0.4	17
80000				53	262	0.3	13
90000				60	270	0.3	12～14
120000				80	325	0.3	14
150000		11 13.8 15.75 18 20		85	430	0.3	18
160000				95	420	0.3	14
180000				95	480	0.2	14～16
240000				96	620	0.2	18.5
250000				120	518	0.2	13
290000				145	550	0.2	14
300000		15.75 18 20		126	640	0.2	14
330000				135	680	0.2	15
360000				165	670	0.2	14
370000				157	720	0.2	18.5
400000				185	735	0.2	14
420000				200	820	0.16	14

Two Winding On-load Tap Change Power Transformer

Rated Power （kVA）	Voltage Combination		Vector Group	Loss（kW）		No-load Current(%)	Impedance (%)
Rated Power （kVA）	Primary Voltage	Secondary Voltage	Vector Group	No load	Load	No-load Current(%)	Impedance (%)
31500	220±8*1.25%	6.3 6.6 10.5 11 35 37 38.5	YNd11	35	135	0.70	18.5
40000				40	170	0.70	14
50000				51	185	0.60	24
63000				55	210	0.60	14
90000		10.5 11 35 37 38.5		70	270	0.40	13
120000				90	340	0.40	13
150000				120	405	0.30	13.5
180000				130	450	0.20	13
120000		66 69		98	365	0.40	12～14
150000				115	440	0.30
180000				133	498	0.20