35kV Power Transformer Manufacturer

Product Features

Advanced design with substantial improvement in material, structure and technology
• High and low voltage clamps adopt steel strap for tightening
• Firm frame structure enhancing iron core clamping force
• Strong anti-short circuit ability
• Beautiful appearance and reliable operation
• Low loss and low noise
• Advanced level of similar foreign products
• Longitudinal oil tunnel for heat dissipation
• Passed National Transformer Testing Center burst short-circuit test

35kV Power Transformer Manufacturer | Custom High Voltage Design

Type Meaning (Model Code)

S □ – □ / □

S: Three-phase
□: Performance level code
□: Rated capacity (kVA)
□: Voltage level (kV)

Example: S11-1000/35 means Three-phase, Performance level 11, 1000kVA capacity, 35kV voltage level.

Product Overview

This series of products is advanced in design, and has substantial improvement in material, structure and technology. High and low voltage clamps adopt steel strap or up beam or side beam for tightening, and form a firm frame structure, are able to enhance iron core clamping force and tolerance to transport impact. It has strong anti-short circuit ability, beautiful appearance, reliable operation, low loss, low noise and has achieved advance level of similar foreign products.

The SZ11-8000/35 transformer produced by our company passed through the burst short-circuit test conducted by National Transformer Testing Center. High and low voltage coil has longitudinal oil tunnel for heat dissipation and can reduce copper oil temperature difference and coil internal highest temperature rising significantly.

Product Features

Advanced design with substantial improvement in material, structure and technology
• High and low voltage clamps adopt steel strap for tightening
• Firm frame structure enhancing iron core clamping force
• Strong anti-short circuit ability
• Beautiful appearance and reliable operation
• Low loss and low noise
• Advanced level of similar foreign products
• Longitudinal oil tunnel for heat dissipation
• Passed National Transformer Testing Center burst short-circuit test

800KVA-31500KVA three-phase duplex winding power transformer of no-excitation voltage regulation:

Main Technical Parameters

Type	Rated Capacity (kVA)	Connection Group	Voltage Combination (kV) High/Low	Tapping Range	No-load Loss (W)	Load Loss (W) Dy/Yy	No-load Current (%)	Short-circuit Impedance (%)
S11-630	630	Yd11	35 / 3.15 6.3 10.5	±5%	830	7870	1.10	6.5
S11-800	800	Yd11	35 / 3.15 6.3 10.5	±5%	980	9410	1.00	6.5
S11-1000	1000	Yd11	35 / 3.15 6.3 10.5	±5%	1150	11540	1.00	6.5
S11-1250	1250	Yd11	35 / 3.15 6.3 10.5	±5%	1410	13940	0.90	6.5
S11-1600	1600	Yd11	35 / 3.15 6.3 10.5	±5%	1700	16670	0.80	6.5
S11-2000	2000	Yd11	35 / 3.15 6.3 10.5	±5%	2180	18380	0.70	6.5
S11-2500	2500	Yd11	35 / 3.15 6.3 10.5	±5%	2560	19670	0.60	6.5
S11-3150	3150	Yd11	35~38.5 / 3.15 6.3 10.5	±5%	3040	23090	0.56	7.0
S11-4000	4000	Yd11	35~38.5 / 3.15 6.3 10.5	±5%	3620	27360	0.56	7.0
S11-5000	5000	Yd11	35~38.5 / 3.15 6.3 10.5	±5%	4320	31380	0.48	7.0
S11-6300	6300	Yd11	35~38.5 / 3.15 6.3 10.5	±5%	5250	35600	0.48	7.5
S11-8000	8000	Yd11	35~38.5 / 3.15 3.3 6.3 6.6 10.5 11	±5%	7200	38500	0.42	7.5
S11-10000	10000	YNd11	35~38.5 / 3.15 3.3 6.3 6.6 10.5 11	±5% or ±2×2.5%	8700	45300	0.42	7.5
S11-12500	12500	YNd11	35~38.5 / 3.15 3.3 6.3 6.6 10.5 11	±5% or ±2×2.5%	10080	53900	0.40	8.0
S11-16000	16000	YNd11	35~38.5 / 3.15 3.3 6.3 6.6 10.5 11	±5% or ±2×2.5%	12160	65800	0.40	8.0
S11-20000	20000	YNd11	35~38.5 / 3.15 3.3 6.3 6.6 10.5 11	±5% or ±2×2.5%	14400	79500	0.40	8.0
S11-25000	25000	YNd11	35~38.5 / 3.15 3.3 6.3 6.6 10.5 11	±5% or ±2×2.5%	17020	94100	0.32	8.0
S11-31500	31500	YNd11	35~38.5 / 3.15 3.3 6.3 6.6 10.5 11	±5% or ±2×2.5%	20220	112900	0.32	8.0

Notes

Note 1: Transformer with 6300KVA or less rated capacity can provide products whose high-voltage tapping range is ±2×2.5%.

Note 2: 10.5KV and 11KV transformer lower than low voltage can provide products with connection symbol of Dyn11.

Note 3: Transformer with 3150KVA or more rated capacity has the greatest tapping current on -5% tapping position.

2000KVA~20000KVA Three-Phase Duplex Winding Power Transformer of On-Load Voltage Regulation

Performance Parameters Table

Type	Rated Capacity (KVA)	Connection Group Grade	Voltage Combination (KV)			No-load Loss (W)	Load Loss (W)	No-load Current (%)	Short-circuit Resistance (%)
			High Voltage	Tapping Range	Low Voltage
SZ11-2000	2000	Yd11	35	±3×2.5%	6.3, 10.5	2300	19240	0.80	6.5
SZ11-2500	2500	Yd11	35	±3×2.5%	6.3, 10.5	2720	20640	0.80	6.5
SZ11-3150	3150	Yd11	35	±3×2.5%	6.3, 10.5	3230	24710	0.72	7.0
SZ11-4000	4000	Yd11	35~38.5	±3×2.5%	6.3, 10.5	3870	29160	0.72	7.0
SZ11-5000	5000	Yd11	35~38.5	±3×2.5%	6.3, 10.5	4640	34200	0.68	7.0
SZ11-6300	6300	Yd11	35~38.5	±3×2.5%	6.3, 10.5	5630	36800	0.68	7.0
SZ11-8000	8000	YNd11	35~38.5	±3×2.5%	6.3, 6.6, 10.5, 11	7870	40600	0.60	7.5
SZ11-10000	10000	YNd11	35~38.5	±3×2.5%	6.3, 6.6, 10.5, 11	9280	48100	0.60	7.5
SZ11-12500	12500	YNd11	35~38.5	±3×2.5%	6.3, 6.6, 10.5, 11	10940	56900	0.56	8.0
SZ11-16000	16000	YNd11	35~38.5	±3×2.5%	6.3, 6.6, 10.5, 11	13170	70300	0.54	8.0

Notes

Note 1: 10.5KV and 11KV transformer lower than low voltage can provide products with connection symbol of Dyn11.

Note 2: The greatest tapping current happens on -7.5% tapping position.

Note 3: Under the circumstance that tapping step and voltage grade keep unchanged, negative tapping step is allowed to increase and positive tapping step is allowed to decrease, or positive tapping step is allowed to increase and negative tapping step is allowed to decrease. Such as (35±³)×2.5% and (35±⁴)×2.5%.

Additional information

Model Series	35kV Power Transformer
Connection group grade	Yd11 or YNd11
Rated capacity(KVA)	30 ~ 3150 (KVA)
High voltage (kV)	35 ~ 38.5 (kV)
Low voltage(kV)	3.15/ 3.3/ 6.3/6.6/ 10.5/ 11(kV)
Short-circuit resistance(%)	6.5 / 7.0/ 7.5 / 8.0
Tapping range	+5% +2×2.5%

How long is the quality assurance of the transformer?

We provide a warranty of up to 18 months. The warranty period is 12 months after the transformer is put into production or 18 months after delivery.

Can three-phase oil immersed transformers be used in renewable energy applications?

Yes, they are suitable for various applications, including renewable energy systems, to ensure efficient energy conversion and distribution.

How often should maintenance be performed on these transformers?

Regular inspections and maintenance should be conducted at least once a year, along with oil quality testing.

What are the benefits of using biodegradable insulating oils?

Biodegradable oils reduce environmental impact and are safer for the ecosystem in case of leakage.

How does oil contribute to the performance of transformers?

Oil acts as both an insulator and a cooling medium, helping to dissipate heat and protect winding materials.

What is the primary function of a three-phase oil immersed transformer?

The primary function is to convert high voltage electricity to lower voltage levels for safe distribution and use.

Are you a trade company or manufacturer?

We are a professional manufacturer with our own factory.

When can I get a price？

We usually quote within 24 hours after we get your inquiry.

How about the after sale service?

1)We will always keep the quality the same as the buyer’s samples and if there is something with the quality, we will make compensation for our customers.

2)We will suggest our packing and take charge in our packing, we will keep the goods safe in the delivery.

3)We will trace the goods from the production to selling, we will solve the problems in the selling for our customers.

Should the customer pay the delivery fee,How much is it?

For the delivery fee, many samples are be requested to be sent,so we must get delivery fee. If you tell me to use the appointed Express, you will give me your express account or you will pay according to the Express.

If you do not request, I will choose a cheap one in China.

Do you have MOQ?

Depends on different ideas, Can be negotiated.The larger the quantity is, the competitive the unit price will be.

Shippment

Our Logistics and Shipping Process

We provide a comprehensive logistics service, ensuring transparency and safety from our factory floor to your designated port or site.

Step	Activity	Details
1	Booking & Planning	We book containers and coordinate schedules based on your requirement (FOB, CIF, DDP, etc.).
2	Pre-Shipment Inspection	Every unit undergoes a final check before packing, with a packing list and photos provided.
3	Packing & Loading	Specialized packing teams secure units . Loading is supervised to ensure safe container stuffing.
4	Customs Clearance	We handle all export documentation, including certificates of origin, and bill of lading.
5	Real-Time Tracking	We provide you with the container number and a tracking link to monitor the shipment in real time.

Payment

Accepted Payment Currency:USD,EUR,JPY,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;

REQUEST A QUOTE

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35kV Power Transformer Manufacturer

Product Features

35kV Power Transformer Manufacturer | Custom High Voltage Design

Type Meaning (Model Code)

Product Overview

Product Features

800KVA-31500KVA three-phase duplex winding power transformer of no-excitation voltage regulation:

Main Technical Parameters

Notes

2000KVA~20000KVA Three-Phase Duplex Winding Power Transformer of On-Load Voltage Regulation

Performance Parameters Table

Notes

Additional information

Our Logistics and Shipping Process

REQUEST A QUOTE

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