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SG(H)10 dry type power transformer

Simply speaking, the dry transformer is the transformer of which the iron core and winding are not immersed in the insulating oil.

It can be divided into two types by structure: (1) winding enveloped with solid insulation (2) winding not enveloped It is used for the fireproof and explosion-proof occasion. For example: general building, subway and so on.

Technical parameters
Product advantage
External dimensions of the product
Features

Model description:

Technical parameters：

1. Rated capacity: 100-2500kVA;

2. Rated voltage: primary voltage of 10kV and 6KV

Secondary voltage 0.4kV and others:

3. Rated frequency: 50Hz;

4. Number of phases: 3 phases;

5. Cooling mode: AN/AF;

6. Temperature resistance level of the insulation materials: Level H;

7. For technical performance data and insulation level, see Table 1 and 2.

Table 1 Performance parameters of dry transformer with primary rated voltage of 6kV, 10kV

Rated capacity (kVA)	Voltage combination			Connection unit symbol	Loss		Impedance voltage (％)	No-load current (％)
Rated capacity (kVA)	Primary voltage kV	Primary voltage tapping range %	Secondary voltage kV	Connection unit symbol	No load W	Load W	Impedance voltage (％)	No-load current (％)
100	6 10	±5	0.4	Dyn11	405	1691	4	1.08
125		±2×2.5		Yyn0	477	1995		0.96
160					549	2290		0.9
200					630	2727		0.84
250					729	2964		0.84
315					891	3734		0.72
400					990	4294		0.72
500					1179	5254		0.72
630					1359	6327		0.6
630					1314	6413	6	0.6
800					1539	7486		0.6
1000					1791	8750		0.6
1250					2115	10431		0.6
1600					2475	12607		0.6
2000					3060	15552		0.48
2500					3600	18487		0.48

Table 2 Insulation level

Rated voltage (kV)	Rated short-term power frequency withstand voltage (kV)
≤1	3
3	10
6	20
10	35
15	38
20	50
35	70

SGH10 series transformer is the insulation system with DuPont NOMEX paper as the main insulating medium. Best electrical performance can be maintained during whole service life of the transformer, and NOMEX paper is not easily aged and has shrinkage resistance, compression resistance and strong elastic force. Therefore, it can ensure that the coil can still maintain close structure and the capability to withstand short circuit after use of the transformer for years. It has high safety and overload capacity, free of flammability, toxic gas, supporting combustion. It is convenient for repair and maintenance, insensitive to humidity, dust and pollution, partial discharge is low, and there is no possibility in 'crack'. The coil adopts the pie type structure and vacuum impregnation process, so as to improve mechanical strength and insulation strength of the coil, and the bottom blowing structure of through-flow fan is adopted for the body, so as to improve heat emission efficiency. It is flexibly designed, and can be made of any specification required according to customer's requirements.

Capacity	L × W × H (mm)	Total weight (kg)
100	1000×620×1080	430
200	1150×620×1145	890
315	1220×620×1280	1290
400	1260×620×1365	1530
500	1280×620×1435	1700
630	1360×700×1540	2190
800	1490×700×1390	2350
1000	1580×720×1480	2840
1250	1670×760×1555	3400
1600	1700×760×1690	3990
2000	1815×890×1690	4410
2500	1815×920×1820	5150

1. Oil-free, pollution-free, flame retardant and fireproof.

2. Low loss, high efficiency and low noise.

3. Small partial discharge capacity (generally below 10PC), high reliability. It can guarantee long-term safe operation, and the life can be up to 30 years.

4. It can resist crack and temperature change, and has high mechanical strength and strong resistance to short circuit capability.

5. The moisture-proof performance is good, it can be in normal operation at the humidity of 100%, and it can be put into operation without drying after stoppage.

6. The independent transformer chamber is not required, it is not required to lift the core for maintenance, and the load bearing beam is not required, which saves floor area for civil engineering; It is oil free, will not generate toxic gas, and will not pollute the environment. The oil sump and other auxiliary buildings are not required, and the construction cost of construction cost is reduced.

7. Installation is convenient without commissioning, and maintenance is almost not required; it is not required to replace and check oil seal, and the operation and maintenance cost is low.