S11-S13 250KVA 11kV 3 Phase Distribution Power Transformer

TRONKI Electric provides a serial of reliable oil-immersed distribution transformers for both industrial and civil use. They are suitable for outdoor and indoor use and work effectively under the temperatures from -25°C to 40°C, stepping down high-voltage grid supply (such as 11 kV, 10.5 kV, 10 kV, 6.3 kV, 6 kV) into 400V in safety for home and business usages.

Key Features

Diverse Application: Suitable for industrial, commercial, and residential power supply.
Efficient Performance: Steps down high voltage to 400V for everyday use.
Wide Temperature Range: Can work in temperatures from -25°C to 40°C.
Durable & Low Maintenance: Built to handle short circuits and overloads with little maintenance.

Main Specification

Rated capacity (KVA)	10~2500 kVA
Vector group	Yyn0 or Dyn11
Impedance voltage (%)	4%, 4.5%
Rated voltage	H. V: 11, 10.5, 10, 6.3, 6kV (or customized)
L. V.	0.4, 0.69kV (or customized)
Tapping range	± 5% or ± 2 * 2.5% (or customized)
Frequency	50/60Hz
Number of phases	3
Cooling method	ONAN
Temperature rise limits	Winding ≤ 65K, Top oil ≤ 60K
Standards	IEC60076 Power Transformer, GB1094 Power Transformer, GB/T6451 Technical Data & Requirement of Three-phase Oil-immersed Power Transformer
Ambient conditions
Altitude	≤1, 000m
Highest ambient temperature	+40℃
Highest annual average temperature	+20℃
Highest monthly average temperature	+30℃
Lowest temperature	-25℃ Indoor and outdoor

RATED CAPACITY	VOLTAGE COMBINATION			CONNECTION GROUP	LOSS (kW)		NO-LOAD CURRENT	SHORT-CIRCUIT IMPEDANCE	WEIGHT(KG)
(kVA)	HV(kV)	HIGH-VOLTAGE TAPPING RANGE	LV (kV)	SYMBOL	NO-LOAD	LOAD	(%)	(%)	OIL WEIGHT	GROSS WEIGHT
30	6 6.3 6.6 10 10.5 11	±5% ±2*2.5%	0.4	Yyn0 Dyn11	0.1	0.63/0.60	2.1	4	75	295
50					0.13	0.91/0.87	1.1		88	395
63					0.15	1.09/1.04	1		95	420
80					0.18	1.31/1.25	1		103	480
100					0.2	1.58/1.50	0.9		115	540
125					0.24	1.89/1.80	0.9		130	645
160					0.28	2.31/2.20	0.8		145	740
200					0.34	2.73/2.60	0.8		175	885
250					0.4	3.20/3.05	0.7		195	1010
315					0.48	3.83/3.65	0.7		230	1205
400					0.57	4.52/4.30	0.6		255	1375
500					0.68	5.41/5.15	0.6	4.5	285	1620
630					0.81	6.2	0.6		350	1960
800					0.98	7.5	0.5		405	2310
1000					1.15	10.3	0.5		490	1690
1250					1.36	12	0.5		550	3315
1600					1.64	14.5	0.4		625	3795

Corrugated Tank Design

Our transformers use a corrugated tank design, which has some great benefits:

Space-Saving: The compact size makes it easier to install.
Better Cooling: The corrugated fins help keep the transformer cool, making it last longer.
Sealed Design: The hermetically sealed tank prevents leaks, reducing maintenance.
Versatile Range: Available in 11 kV and 33 kV versions, with power ratings up to 2500 kVA.

Why Choose Our Transformers?

● Low loss
● Low noise
● Easy maintenance
● Operation reliability
● Compact structure
● Strong mechanical strength and short-circuit withstand ability
● 100% guaranteed no leakage