Customization 7.2kV 10kV 15kV 15.5kVclass S13 series oil immersed fully sealed power transformer

Name: Customization 7.2kV 10kV 15kV 15.5kVclass S13 series oil immersed fully sealed power transformer
Brand: Wenzhou Rockwill Electric Co., Ltd.
SKU: 2636
Price: 1.99 USD
Availability: InStock

Wenzhou Rockwill Electric Co., Ltd.

17yrs 700++ staff 108000m²+m² US$150000000+ China

Wenzhou Rockwill Electric Co., Ltd.

17yrs 700++ staff 108000m²+m² US$150000000+ China

Attributes Description Documentation Resource Library Supplier

Key attributes

Brand	ROCKWILL
Model NO.	Customization 7.2kV 10kV 15kV 15.5kVclass S13 series oil immersed fully sealed power transformer
Rated voltage	10kV
Rated frequency	50/60Hz
Rated capacity	200kVA
Series	S13

Product descriptions from the supplier

Description

Product Description

As a pioneer in China's power transformer industry, we have specialized in the R&D and manufacturing of power transformer equipment for decades, and established industry standards with core technologies.

The 7.2kV 10kV 15kV 15.5kV Class S13 Series Oil-Immersed Fully Sealed Power Transformer is a high-efficiency distribution transformer designed for reliability and longevity. As part of the S13 series, it meets stringent energy efficiency standards, significantly reducing no-load losses compared to conventional models. Its fully sealed, oil-immersed construction eliminates the need for a conservator, preventing insulating oil from contacting ambient air and moisture. This makes it an exceptionally robust and maintenance-free solution for continuous operation in utility and industrial power distribution networks.

This power transformer is fully compliant with international standards including IEC 60076-1, IEEE C57.12.00, ANSI C57.12.90, AS/NZS 60076.5 and EN 61558-1. It meets quality requirements and is widely adaptable to the operational needs of power grids in multiple overseas regions.

Product model

S: Three-phase
13: Performance Level
M: Fully Sealed
□: Rated Capacity (kVA)
□: Rated High Voltage

Conditions of use

Altitude: No more than 1000m, indoor or outdoor.
Ambient temperature: The highest ambient air temperature is +40℃, the highest daily average temperature is +30℃, maximum annual average temperature is +20℃, and the minimum temperature is -25℃.
Transformers can be provided to operate under special conditions according to user requirements.

Performance Parameters: Technical Parameters of S13-30~3150/10kV Series Oil-immersed Fully Sealed Power Transformer

The voltage classes of some of these Power Transformer include 6kV, 6.3kV, 6.6kV, 6.9kV, 7.2kV, 10kV, 10.5kV, 11kV, 11.5kV, 12kV, 13.2kV, 13.8kV, 14.5kV, 14.4kV, 15kV, 15.5kV, 15.6kV, 17.5kV, 20kV, 21.9kV, 22kV, 24kV, 30kV, 33kV, 33.5kV, 34.5kV, 35kV, 36kV, 38kV, 38.5kV, 40.5kV, 44kV, 45kV, 46kV, 66kV 69kV.72.5kV 88kV 110kV 115kV 123kV 125kV 126kV 132kV 138kV 145kV 150kV 154kV 161kV 170kV 220kV 225kV 230kV 245kV 275kV 330kV 345kV 363kV 380kV 400kV 500kV Power transformers of voltage ，and aboveand customization is available.

Model	Capacity (kVA)	Rated Voltage		Connection Group	No-load Loss (W)	Load Loss (W)	No-load Current (A)	Short-circuit Impedance %	Weight			Outline Dimensions (Length * Width * Height mm)	Gauge
Model	Capacity (kVA)	High Voltage (kV)	Low Voltage (kV)	Connection Group	No-load Loss (W)	Load Loss (W)	No-load Current (A)	Short-circuit Impedance %	Oil Weight (kg)	Core Weight (kg)	Total Weight (kg)	Outline Dimensions (Length * Width * Height mm)	Gauge
S13-M-30/10	30	6 6.3 10 10.5 11 Voltage Regulation Range ±5% or ±2×2.5%	0.4	Dyn11 Yyn0	80	630	1.4	4.0	90	200	400	1050 * 630 * 1040	400 * 400
S13-M-50/10	50				100	910	1.2		100	220	460	1020 * 680 * 1080
S13-M-63/10	63				110	1090	1.1		110	250	500	1060 * 690 * 1090
S13-M-80/10	80				130	1310	1.0		115	290	550	1070 * 700 * 1100
S13-M-100/10	100				150	1580	0.9		120	350	620	1090 * 710 * 1120
S13-M-125/10	125				170	1890	0.8		145	390	700	1130 * 730 * 1180
S13-M-160/10	160				200	2310	0.8		175	460	830	1160 * 750 * 1180	550 * 550
S13-M-200/10	200				240	2730	0.7		190	520	910	1190 * 750 * 1260
S13-M-250/10	250				290	3200	0.7		200	610	1000	1230 * 770 * 1280
S13-M-315/10	315				350	3830	0.6		220	730	1430	1280 * 830 * 1290
S13-M-400/10	400				410	4520	0.5		260	900	1430	1310 * 830 * 1340	660 * 660
S13-M-500/10	500				490	5410	0.5		280	1000	1600	1389 * 890 * 1380
S13-M-630/10	630				580	6200	0.4	4.5	330	1100	1830	1490 * 980 * 1410
S13-M-800/10	800				700	7500	0.4		450	1280	2300	1560 * 1000 * 1560	820 * 820
S13-M-1000/10	1000				830	10300	0.4		550	1450	2700	1700 * 1130 * 1650
S13-M-1250/10	1250				980	12000	0.3		630	1800	3200	1830 * 1230 * 1710
S13-M-1600/10	1600				1180	14500	0.3		800	2100	3700	1880 * 1270 * 1790
S13-M-2000/10	2000				1410	17400	0.3	5.5	1050	2600	4500	1980 * 1310 * 1900	920 * 920
S13-M-2500/10	2500				1660	20240	0.3		1200	3100	5500	2360 * 1580 * 2300
S13-M-3150/10	3150				1980	24100	0.3		1400	4100	7200	2700 * 1780 * 2500

Note: for transformers rated at 500 kva and below, the load loss values above the diagonal lines in the table apply to dyn 11 or yzn 11 connection groups, and the load loss values below the diagonal lines apply to yyno connection groups.

Key Technical Features

High Energy Efficiency (S13 Class):Incorporates advanced core materials and design to achieve superior energy performance, notably lowering no-load losses and resulting in substantial cost savings over the transformer's lifetime.
Fully Sealed, Maintenance-Free Design:The hermetically sealed tank with corrugated or smooth tank walls ensures no breathing of the insulating oil. This prevents oxidation and moisture absorption, eliminating the need for periodic oil filtration or testing.
Enhanced Reliability and Durability:The sealed construction protects the internal insulation system from environmental contaminants and humidity fluctuations, ensuring stable dielectric strength and a long service life even in harsh conditions.
Robust Oil-Immersed Technology:Provides excellent heat dissipation and overload capacity. The insulating oil effectively cools the core and windings, allowing for reliable performance under peak load demands.
Safe and Environmentally Considerate:Designed with pressure relief devices for safety. The sealed system minimizes the risk of oil leakage, protecting the surrounding environment.

Know your supplier

ROCKWILL

Wenzhou Rockwill Electric Co., Ltd.
17yrs 500-1000 employees 108000m²+m² US$150000000+ China

Wenzhou Rockwill Electric Co., Ltd.

17yrs 500-1000 employees 108000m²+m² US$150000000+ China

Online store

On-time delivery rate

Response time

100.0%

≤4h

Company overview

Workplace: 108000m²m² Total staff: 700+ Highest Annual Export(usD): 150000000

Workplace: 108000m²m²
Total staff: 700+
Highest Annual Export(usD): 150000000

Services

Business Type: Design/Manufacture/Sales

Main Categories: High Voltage Electrical Apparatus/Electric transformer

Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.

Negotiable

Pricing calculator

Model

S13-M-200/10

Warranty by

Whole life care manager

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.

Related Knowledges

Main Transformer Accidents and Light Gas Operation Issues

1. Accident Record (March 19, 2019)At 16:13 on March 19, 2019, the monitoring background reported a light gas action of No. 3 main transformer. In accordance with the Code for Operation of Power Transformers (DL/T572-2010), operation and maintenance (O&M) personnel inspected the on-site condition of No. 3 main transformer.On-site confirmation: The WBH non-electrical protection panel of No. 3 main transformer reported a Phase B light gas action of the transformer body, and the reset was ineff

Leon

02/05/2026
Faults and Handling of Single-phase Grounding in 10kV Distribution Lines

Characteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in

Rockwill

01/30/2026
Neutral point grounding operation mode for 110kV～220kV power grid transformers

The arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi

Vziman

01/29/2026
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?

Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr

Echo

01/29/2026
Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?

Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I

Vziman

01/29/2026
Understanding Transformer Neutral Grounding

I. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit

Vziman

01/29/2026