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It is applicable for power systems of AC50Hz and rated working voltage up to and including 10kV, used as distribution transformer for enterprises of petroleum, metallurgy, chemical industry, textile industry, light industry, etc, also can be used in some dusty locations. 

Iron core
The core is made of amorphous alloy strips by means of winding, whose no-load loss is only 25% of that of S9 distribution transformer. 

Winding
The winding adopts corrugated oil duct with non-dipping process, bound by shrinkable tape; all windings are of square with rounded angle; taps of HV winding with corresponding tapping voltage shall be led to the tap switch, and the switch shall be installed on the box cover. Power supply must be cut off first when changing the tapping voltage.

Installation of protective device
● Transformers of class 30~2000kVA are equipped with pressure relief valve;
● Gas relay with alarm and tripping terminals is available on request.

Oil temperature measuring device
● All the transformers are equipped with tube holder for glass-stem thermometer that is set on the top of oil tank, and immersed in oil for about 120±10mm;
● 1000~2000kVA transformer is equipped with outdoor signal thermometer;

Transformer oil tank
● Transformer oil tank is composed of corrugated walls with powder painted surface and reinforced with film. Corrugated cooling fin not only has cooling function, but also has “breathing” function, the elasticity of corrugated cooling fin make it adapt to the change of oil volume due to change of temperature. So this hermetically sealed transformer does not have oil conservator, which decreases the height of transformer;   
● The transformer adopts vacuum oil-injection technology during encapsulation that thoroughly removes the moisture from transformer, and keeps the transformer oil from contacting the air. This technology also avoid insulation performance reduction or oil aging due to entering of oxygen or moisture, so it is unnecessary to conduct oil sampling test regularly. 

● Installation height: altitude shall not exceed 1000m
● Ambient temperature: -40℃~40℃

Rated capacity	Voltage combination			Connection group	Loss (kV)		No-load current	Short-circuit impedance	Weight (kg)			Outline dim. (m)			Track gauge vertical/horizontal
	HV		LV
(kVA)	(kV)	Tapping range	(kV)	symbol	No-load	On-load(145°)	(%)	(%)	Machine body	Oil weight	Gross weight	L	W	H	(mm)
10	11 10.5 10 6.3 6	±5% ±2×2.5%	0.4	Dyn11	19	0.35	3.2	4.0	80	70	220	0.79	0.65	0.88	400/400
20					26	0.48	2.7		130	80	290	0.81	0.71	0.90	400/400
30					33	0.60	1.7		170	80	340	0.83	0.79	0.93	400/400
50					43	0.87	1.3		230	100	440	0.88	0.80	0.99	400/400
63					50	1.04	1.2		290	110	530	0.89	0.81	1.02	450/450
80					60	1.25	1.1		330	120	590	0.90	0.82	1.05	450/450
100					75	1.50	1.0		380	140	680	0.96	0.87	1.09	550/550
125					85	1.80	0.9		440	160	790	1.19	0.87	1.13	550/550
160					100	2.20	0.7		520	190	920	1.30	0.96	1.11	550/550
200					120	2.60	0.7		620	220	1070	1.39	1.01	1.11	550/550
250					140	3.05	0.7		730	250	1250	1.48	1.07	1.15	550/550
315					170	3.65	0.5		880	300	1510	1.40	1.05	1.21	550/550
400					200	4.30	0.5		1070	360	1790	1.54	1.08	1.28	550/550
500					240	5.15	0.5		1240	390	2050	1.63	1.14	1.31	660/660
630					320	6.20	0.3	4.5	1570	510	2580	1.67	1.14	1.41	820/820
800					380	7.50	0.3		1880	590	3080	1.89	1.18	1.48	820/820
1000					450	10.30	0.3		2040	690	3370	1.85	1.38	1.58	820/820
1250					530	12.00	0.2		2480	850	4260	2.00	1.54	1.68	820/820
1600					630	14.50	0.2		3010	1070	5180	2.14	1.60	1.75	820/820
2000					750	17.40	0.2	5.0	3540	1150	6180	2.29	1.76	1.87	820/820

Order guide
Please specify the product model, rated capacity, HV/LV rated voltage and high-voltage tapping range, phase number, frequency, connection group symbol and so on in the order.