110kV Series Power Transformer with On-Load Tap Changer

Our 110kV class power transformers are developed based on advanced technologies absorbed from both domestic and international sources. Aiming to enhance product reliability, we have continuously improved R&D, processes, and structures, and implemented strict quality control. The resulting products feature low loss, low noise, low partial discharge, high mechanical and electrical strength, and fully sealed core-pull-free design, which can significantly reduce operating costs and improve the economic efficiency and safety of power grids.

product details

Type & Meaning

1	Three-Phase
2	Oil-Immersed Forced Air Cooling (self-cooling omitted)
3	Three-Winding (two-winding omitted)
4	On-Load Tap-Changing (off-load tap-changing omitted)
5	Performance Level Code (*)
6	Rated Capacity (kVA)
7	Voltage Class (kV)

(*) Type 9, 10, 11 or even lower loss products can be provided as required.

Product Features

◇ Core: Adopts fully mitered, multi-step joints and high-permeability silicon steel sheets, reducing no-load loss. Optimized cross-section design for core limbs and yokes improves clamping and reduces transformer noise.
◇ Winding: Supported by formed paper cylinders; inner windings have additional support points to enhance mechanical strength. Improved transposition and combined conductors effectively reduce load loss. Computer simulation of winding thermal fields optimizes heat dissipation and oil guiding, significantly reducing the temperature difference between copper and oil.
◇ Body & Insulation: Key parts use pulp-molded components for reasonable electric field distribution. All lead connections adopt cold-pressed joints to control partial discharge. The body is dried and pressurized as a whole, with a new clamping structure and more compression points ensuring tightness and reliability. Systematic electric field calculation of leads ensures reasonable and firm layout, greatly improving short-circuit withstand capability.
◇ Tank: Plate-reinforced steel tank with an elegant appearance. The control box is mounted on the transformer body, eliminating the need for a separate foundation (corrugated tanks are available upon customer request).
◇ Accessories: All valves are made of high-quality alloy steel to prevent leakage and ensure reliability. Square seamless steel pipes are used for radiator oil collection, eliminating leakage and improving the overall appearance.

product Display

Technical Parameters

Technical Parameters of SFZ9 Type 110kV Series Two-Winding On-Load Tap-Changing Power Transformer

Rated Capacity (KVA)	Voltage Combination and Tap Range			Connection Symbol	Loss (kW)		Short-Circuit Impedance (%)	No-Load Current (%)	Weight (kg)	Overall Dimensions (mm)	Wheelbase (mm)
Rated Capacity (KVA)	High-Voltage (KV)	Tap-Changing (%)	Low-Voltage (kV)	Connection Symbol	No-Load	Load	Short-Circuit Impedance (%)	No-Load Current (%)	Weight (kg)	Length(L)×Width(W)×Height(H)	Wheelbase (mm)
10000	110 121	±8×1.25	6.6 6.3 10.5 11	YNd11	13.7	53	10.5	0.85	21500	5560×3500×4780	1475×1475
12500					15.7	63		0.8	25000	5650×3580×4850	1475×1475
16000					18.4	77		0.75	30300	5700×3650×4900	2040×1475
20000					21.1	94		0.7	36000	5950×3850×5000
25000					24.3	111		0.65	41500	5980×4100×5050
31500					27.9	133		0.6	50100	6100×4120×5100
40000					33.3	157		0.55	59000	6400×4250×5200
50000					39.6	194		0.5	68000	6600×4450×5400
63000					50.4	234		0.45	81000	6800×4650×5600

Note: The overall dimensions and weight data in the table are for reference only; no prior notice will be given for any changes.

Technical Parameters of SFS9 Type 110kV Series Two-Winding On-Load Tap-Changing Power Transformer

Rated Capacity (kVA)	Voltage Combination and Tap Range				Connection Symbol	Loss (KW)		Short-Circuit Impedance (%)		No-Load Current (%)	Weight (kg)	Overall Dimensions (mm)	Wheelbase (mm)
Rated Capacity (kVA)	High-Voltage (KV)	Tap-Changing (%)	Medium Voltage (kV)	Low-Voltage (KV)	Connection Symbol	No-Load	Load	Step-Up	Step-Down	No-Load Current (%)	Weight (kg)	Length(L)×Width(W)×Height(H)	Wheelbase (mm)
10000	110 121	±2×2.5	35 38.5	6.6 6.3 10.5 11	Yyn0 Dyn11	15.3	67	High-Medium: 17-18 High-Low: 10.5 Medium-Low: 6.5	High-Medium: 10.5 High-Low: 17-18 Medium-Low: 6.5	0.9	24000	5350×3100×5000	1475×1475
12500						17.5	78			0.85	28500	5450×3150×5200	1475×1475
16000						19.8	95			0.8	34000	5500×3200×5400	2040×1475
20000						23.4	112			0.75	38500	5600×3250×5500
25000						26.5	133			0.7	44500	5800×3600×5650
31500						30.6	157			0.65	52800	6250×3950×5800
40000						36	189			0.6	62800	6500×4100×5900
50000						43.5	225			0.55	73000	6750×4200×6050
63000						51.2	270			0.5	88000	7000×4450×6250