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On-load Tap Changer (OLTC) Power Transformer with Adjustable Capacity

Palestine On-load Tap Changer (OLTC) Power Transformer with Adjustable Capacity

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PalestineOil-immersed Power Transformer

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Product Description

OLTC Transformer Introduction

An on-load voltage regulator (OLTC) is an electrical device that can adjust the output voltage when the transformer is running under load. It is widely used in power systems to ensure voltage stability. The output voltage of the transformer may fluctuate due to changes in input voltage or load. In order to maintain the output voltage within the allowable range, the voltage needs to be adjusted by adjusting the tap position of the transformer winding. "On-load" voltage regulation refers to tap switching without cutting off the power supply.

OLTC Transformer Parameters

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

TSTY Power Transformer Advantages

High-Quality Raw Materials

1. Uses silicon steel raw materials from top-tier state-owned enterprises like Wuhan Iron and Steel and Baosteel.

2.Control material quality from the source, reducing defects.

Fully Automated and Unmanned Process

1.Intelligent cross-cutting and longitudinal shearing, RGV rails, AGV/unmanned forklifts, dual intelligent automated warehouses, automatic stacking machines, automatic inspection and conveying, etc.

2.educes human error, bumps, and material damage.

High Precision and Consistency

1. Smooth, burr-free cuts; perfectly fitted laminations.

2.Unified control of lamination position, pressure, and gap.

3.Constant tension winding; automatic computer counting eliminates human error.

Full Traceability

1. Each iron core has an independent traceability code.

2.Each SOP corresponds to a unique QR code.

3.Raw material batches, process records, and responsible persons are all traceable; problems can be located in seconds.

National-Level Testing and Export Certification

1. CNAS National-Level Testing Center; one of the ≤5 institutions nationwide with relevant transformer testing capabilities.

2.Never leaving the factory if substandard.

3.Compliant with IEC, GB/T, IEEE, and ANSI standards; meets UL, CE, GOST, and other market requirements.

Global Environmental Adaptability

1. Five-fold anti-corrosion upgrades: C5-grade electrostatic powder coating, 150μm thickness, salt spray resistance >1000h.

2.Suitable for harsh environments such as coastal areas, high-altitude regions, extreme cold, and high humidity.

3.Customization available, including FR3 vegetable oil and vacuum-sealed anti-corrosion packaging.

OLTC Transformer Features

1. Non-stop voltage regulation. Adjust the output voltage during equipment operation without disconnecting it from the grid to ensure continuous power supply

2. Voltage stability. Effectively deal with load fluctuations and voltage drop problems in long-distance power transmission

3. Automation. Can be used with automatic voltage regulators to achieve remote intelligent control

4. Extend equipment life. Reduce damage to electrical equipment caused by abnormal voltage

R&D Advantages

TSTY currently has 600 employees and a technical R&D team of more than 200 people. It has established a science and technology innovation center to focus on material and process innovation and realize independent research and development of transformers; relying on the national CNAS certified laboratory, each product passes more than ten rigorous tests such as lightning strike and insulation no-load loss to ensure stable operation in the whole environment.