33kv 630kVA Oil Filled Three Phase Power Transformers China

Specifications
1.Low no-load loss&energy conservation 
2.Low noise&environmental protection 
3.Power Transformers 
4.IP20 IP23 
5.IEC ISO
1,11kV, S11 ,3 phase oil immersion power transformer 
2,high efficiency, low loss 
3,Low losses and Low Noise
 
Describtation of Product:
The three-phase oil-immersed distributing transformer applies new type insulating structure and makes short-circuit resistances strong. The iron core is made of high-quality cold-rolled silicon-steel plate. High-voltage winding group is made up of high-quality oxygen-free copper lines and it adopts multilayered drum type structure. All fasteners have been processed with special treatment to prevent them from loosening.
Standards
GB 1094.1-1996     GB 1094.2-1996    JB/T 10088-2004
GB 1094.3-2003     GB 1094.5-2003    GB/T10237-1988
GB/T 6451-1999     GB/T 7595-1987    JB/T 3837-1998
 
Technical Data:
1) Rated Power: 30~2500kVA
2)Rated HV: 6KV,6.3KV, 10KV, 10.5KV,11KV,15KV,20KV,22KV,33KV 35KV,36KV
3)Rated LV: 0.4kV,0.415KV,0.38KV
4)Phase No. :single or three;
5)Rated frequency: 50Hzor 60 Hz;
6)Vector group: Dyn11, Yyn0 or others;
7)Short circuit impedance: 4%, 4.5% ,6% or others in accordance to client needs;
8)Tapping voltage regulation type: off-load or on-load;
9)Tapping range: +/-2*2.5% / 5%or others in according to client needs;
10)Cooling type: oil nature, oil cooling
 
Performance Parameter List:

Rated capacity (kVA)	Voltage combination and tap range			Connection Group	No-load loss (W)	75oC load loss   (W)	No-load current (%)	Impedance voltage (%)
	High voltage (kV)	Tap (%)	Low voltage (kV)
10	6 6.3 6.6 10 10.5 11	±5 ±2×2.5	0.4 0.69	Yyn0 Dyn11 Yzn11	55	310/325	2.80	4.0
20					70	480/500	2.50
30					100	600/630	2.30
50					130	870/910	2.00
63					150	1040/1090	1.90
80					180	1250/1310	1.90
100					200	1500/1580	1.80
125					240	1800/1890	1.70
160					280	2200/2310	1.60
200					340	2600/2730	1.50
250					400	3050/3200	1.40
315					480	3650/3830	1.40
400					570	4300/4520	1.30
500					680	5150/5410	1.20
630					810	6200	1.10	4.5
800					980	7500	1.00
1000					1150	10300	1.00
1250					1360	12000	0.90
1600					1640	14500	0.80
2000					2000	17400	0.70	5.0
2500					2400	20200	0.60
3150					2800	24000	0.50

Note: 1. Load loss values above the oblique line in the table are applicable to the Yyn0 connection group, and the values below the oblique line are applicable to the Dyn11 or Yzn11 connection group. 
         2. The list shows main performance parameters of a three-phase duplex winding off-circuit-tap-changing distribution transformer. Customized transformers of different specification are available upon the demand of users.