As an internationally accepted medium-voltage power distribution standard, 11kv has better grid adaptability than 10kv. 11kV transformers are more energy efficient, reliable and adaptable to different scenarios than traditional 10kV models, and are especially suitable for high-load density areas and grid requirements in the new energy era. TSTY provides power transformers with a capacity range of 15-31500KVA, which are widely used in various industrial and commercial power distribution, data center power supply, grid upgrade and transformation, and new energy grid connection.

11KV Electric Transformer Parameters

30-2500KVA 6-11KV Oil-immersed transformer
Rated Capacity (kVA)	Voltage Combination			Vector Group	No-Load Loss(w)	Load Loss	No-Load Current (%)	Short Circuit Impedance (%)
Rated Capacity (kVA)	High Voltage（kV)	Tapping Range	Low Voltage (kV)	Vector Group	No-Load Loss(w)	Load Loss	No-Load Current (%)	Short Circuit Impedance (%)
30	11 10.5 10 6.3 6	±5% ±2×2.5%	0.4	Dyn 11 or Yyn0	130	630	2.1	4
50					170	910	2.0
63					200	1090	1.9
80					250	1310	1.8
100					290	1580	1.6
125					340	1890	1.5
160					400	2310	1.4
200					480	2730	1.3
250					560	3200	1.2
315					670	3830	1.1
400					800	4520	1.0
500					960	5410	1.0
630					1200	6200	0.9	4.5
800					1400	7500	0.8
1000					1700	10300	0.7
1250					1950	12000	0.6
1600					2400	14500	0.6
2000					2850	19500	0.6	5
2500					3000	21200	0.6	5

11kv Transformer Advantages

Voltage adaptability advantage

1. Lower transmission loss: Under the same power, the 11kv line current is about 9% lower than that of 10kv, and the line loss is reduced by 15%-20%. It is especially suitable for industrial parks or long-distance power supply.

2.Strong compatibility: It can be directly connected to the 11kv/6.6kv multi-voltage level system without additional boosting equipment.

3.Strong scalability: It supports upgrading to high voltage levels and adapts to the needs of power grid expansion.

High efficiency and energy saving

Adopting the high magnetic permeability oriented silicon steel sheet + step lamination process produced by China Baosteel, the load loss is 5% lower than the national standard (GB/T 6451), and the energy saving effect is significant.

Reliable insulation performance

The 11kV system has a higher insulation level to the ground, the winding uses NOMEX paper, and the production process uses vacuum oiling/drying, which greatly enhances the insulation performance.

30Years Service Life

Using new mineral insulating oil to enhance insulation/extend life, it can ensure a service life of 30 years.

TSTY Transformer Manufacturing Advantage

Part	Key features	Core advantages
01 Silicon steel cross shearing and longitudinal shearing	Intelligent cross-cutting and slitting machine; fully automatic roll feeding → cutting → material handling; photoelectric deviation correction.	The cut is clean, burr-free, and protects the insulation layer, preventing localized overheating.
02 Iron Core Intelligent Automated Warehouse	RGV intelligent track, unmanned handling; independent traceability code	Production capacity increased by 3 to 5 times; zero damage; batch/process/responsible person traceable.
03 Fully Automatic Stacking Machine	The largest fully automatic stacking machine in the country; uniform position/pressure/gap.	Low iron loss, low noise, and stable temperature rise; conforms to national standards/IEC/UL; eliminates insulation scratches, inter-chip short circuits, and dimensional deviations.
04 Unmanned Forklift/AGV	Automatic positioning, obstacle avoidance, loading and unloading, stacking, and warehouse entry and exit.	24/7 continuous production, saving manpower and increasing efficiency
05 coil winding	U-shaped production line; constant tension; automatic computer counting; reserved heat dissipation channel.	Efficiency +30%; Undamaged insulation; Elimination of inter-turn short circuits; Abnormal alarm shutdown; Extended service life.
06 Insulation material processing	100% self-made; five-dimensional control: size, moisture content, surface, cleanliness, and batch consistency.	Low local dissipation, low dielectric loss, withstand voltage without breakdown, and temperature rise within acceptable limits.
07 Dual-intelligent automated warehouse	Intelligence rate of 95%+; WMS scheduling; space utilization rate increased by 3 to 5 times.	Unmanned warehousing, positioning, and outbound processes; 99% first-pass yield rate for the entire machine.
08 Body assembly	Integrated electrical laminate wood panel; multi-strand soft copper leads	Short-circuit resistant, vibration resistant, and less prone to partial discharge when bent; cost increased by approximately 1%, but reliability is significantly improved.
09 Terahertz vacuum drying	Terahertz electromagnetic waves drive water internally; precise equipment control	Consistent batches; 60 units per batch; improved insulation strength, preventing moisture buildup and aging.
10 Final Assembly	Dedicated personnel for each process; standardized operating procedures (SOPs); QR code traceability.	Accountability is assigned to specific individuals, and the entire process is traceable.
11 Fully enclosed vacuum oil injection	Integrated degassing, dehydration, filtration, and oil injection under vacuum; no contact with air throughout the entire process.	Uses brand new national standard mineral oil; 45# is suitable for -40℃, 25# is suitable for extreme heat; FR3 vegetable oil can be customized.
12 CNAS testing	≤5 nationwide; finished products left to stand for 24 hours; full-item testing; 3 machines running in parallel.	No defective products will leave the factory; testing can be completed in as little as 20 minutes; batch delivery without bottlenecks.
13 Anti-corrosion packaging	Five-fold corrosion protection: stainless steel bolts, rounded corners, shot blasting, pickling and phosphating, C5 powder coating, and rubber sheath.	Salt spray test >1000h; wooden pallet/box/iron frame + optional vacuum anti-corrosion; cost + approximately 2%.