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TSTY OLTC Power Transformer Distribution Transformer with On-Load Tap Changer Manufacturer

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TSTY OLTC Power Transformer Distribution Transformer with On-Load Tap Changer Manufacturer

OLTC Power Transformer = A high-voltage transformer with an adjustable tap changer that regulates voltage without switching off the power.

Technical Specifications:
• USES: Variable voltage distribution transformer
• Voltage Coverage: 380V~35KV
• Capacity Spectrum: 130kVA~10000kVA
• Certification Mastery: ISO 9001, IEC, SGS, Intertek, CCC, CE, BV, GOST compliant

For detailed specifications, quotations, or project consultations, please contact us:
Email: sales@tstytransformer.com
WhatsApp: +86-18001856258
Our technical team is ready to assist you — wherever your business operates.

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Product Advantage

Technical Parameters

Factory Show

FAQ

Certificate Collection

Benefits of OLTC Distribution Transformers

Continuous Voltage Control: No shutdown during adjustment
Extended Equipment Life: Reduced stress on downstream equipment
High Reliability: Ideal for power utilities, industrial grids, renewable plants

油变详情页配图1

Standard Features

Oil thermometer & oil level indicator
Gas relay (≥800 kVA)
Pressure relief valve
Vector groups: Dyn11, Yyn0, Yd11, etc.
Wheels & terminal box (LV/HV sealed box)

Optional Features

Winding temperature monitor
DGPT2 multi-function protector
Advanced OLTC controller with remote SCADA integration

All products carry CE/IEC/SGS/BV/GOST certifications. Our $8M R&D center develops next-gen solutions.Our distribution transformer series represents the pinnacle of power conversion technology, delivering unmatched performance, safety, and durability. Engineered for excellence, these transformers set industry benchmarks for reliability across global power applications.

Voltage combination							No-load current (%)	Short -circuit impedance (%)
Rated capacity (kVA)	HV (kV)	HV tapping range (%)	LV (kV)	Connection symbol	No-load loss (W)	Load loss (W)	No-load current (%)	Short -circuit impedance (%)
160(50)	10 10.5 11	+/-5	0.4	Dyn11 Yyn0	400(170)	2585(870)	1.6(0.9)	4.0 (4.0)
200(63)					480(200)	3060(1040)	1.5(0.9)
250(80)					560(250)	3600(1250)	1.4(0.7)
315(100)					670(290)	4320(1500)	1.4(0.7)
400(125)					800(340)	5220(1800)	1.3(0.6)	4.5 (4.0)
500(160)					960(400)	6210(2200)	1.2(0.6)
630(200)					1200(470)	7650(2600)	1.1(0.5)

S20 Oil-Immersed Three-Phase Double-Winding On-Load Tap-Changing Power Transformers
Rated Capacity kVA	Voltage Combination			No-Load Loss kW	Load Loss(75℃) kW	Short-Circuit Impedance %
Rated Capacity kVA	High Voltage（kV)	Tapping Range	Low Voltage (kV)	No-Load Loss kW	Load Loss(75℃) kW	Short-Circuit Impedance %
3150	33 35 38.5	±5% ±2×2.5%	0.4	2.1	22.2	7
4000				2.5	26.2
5000				3.0	30.8
6300				3.7	33.0	7.5
8000				5.1	36.5
10000				6.0	43.2
12500				7.1	51.1	8
16000				8.5	63.3
20000				10.1	74.4
25000				11.9	88.0	10
31500				14.2	104.4	10

S22 Oil-Immersed Three-Phase Double-Winding On-Load Tap-Changing Power Transformers
Rated Capacity kVA	Voltage Combination			No-Load Loss kW	Load Loss(75℃) kW	Short-Circuit Impedance %
Rated Capacity kVA	High Voltage（kV)	Tapping Range	Low Voltage (kV)	No-Load Loss kW	Load Loss(75℃) kW	Short-Circuit Impedance %
3150	33 35 38.5	±5% ±2×2.5%	0.4	1.8	22.2	7
4000				2.1	26.2
5000				2.6	30.8
6300				3.1	33.0	7.5
8000				4.3	36.5
10000				5.1	43.2
12500				6.0	51.1	8
16000				7.2	63.3
20000				8.5	74.4
25000				10.1	88.0	10
31500				12.0	104.4	10

Spanning 250,000 in Henan, our smart factory leverages 5G automation to produce 3,000+ IEC/CE-certified substations annually. With 158 patents and 99% automation, we power projects across 80+ countries.

Q: Are you a factory or trading company?

A: We are an integrated manufacturer and exporter. OEM/ODM services are supported.

Q: What are your main advantages?

A: Over 30 years of industry experience, advanced production lines, reliable quality, fast lead time, and responsive service. Free spare parts are also available for support.

Q: How fast can you deliver?

A: Delivery time depends on the order quantity. Normally 15–20 days after receiving deposit.

Q: What payment methods do you accept?

A: T/T, L/C, PayPal, Visa, Western Union — based on your order needs.

Q: Do you inspect the products before shipment?

A: Yes, we conduct 100% quality inspection before delivery.

Q: What certifications do you hold?

A: CE, SGS, ISO, IEC, GOST —all internationally recognized. We also partner with brands like DuPont, ABB, and Siemens.

Q: How can I be sure you're using quality materials?

A: We welcome material testing upon delivery. We focus on long-term partnerships, not one-time transactions.

TSTYNICE transformers hold ISO 9001, IEC 60076, CE, GOST, SGS, and BV certifications, with 158 patents (20 inventions). Our CNAS-accredited lab ensures global compliance across 80+ markets.