Oil-immersed amorphous alloy distribution transformer 35kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Oil-immersed amorphous alloy distribution transformer 35kV
Rated voltage	35kV
Rated frequency	50/60Hz
Rated capacity	1000kVA
Series	SH15

Description

The Rockwill oil-immersed amorphous alloy distribution transformer utilizes an amorphous alloy core manufactured via rapid quenching technology. The amorphous ribbon core exhibits a disordered atomic structure free of crystalline grain boundaries and magnetic domain anisotropy, delivering ultra-low hysteresis loss and eddy-current loss. Compared with conventional CRGO silicon-steel transformers, it achieves 70–80 % lower no-load losses and 80–85 % lower no-load current, drastically reducing lifetime energy waste and carbon footprint.

The transformer covers system voltages of 10 kV and 35 kV with a capacity range from 10 kVA to 5000 kVA.

Key Features

Ultra-low no-load loss： Amorphous alloy core reduces no-load losses by 70–80 % compared to conventional CRGO silicon-steel cores, significantly cutting lifetime energy consumption
Low no-load current ： 80–85 % reduction in no-load current minimizes reactive power draw
High-resistance core material： Fe-based metallic glass ribbon with 2–3× higher resistivity than CRGO eliminates crystalline grain-boundary losses
Oil-immersed construction： Transformer oil provides effective cooling and insulation, ensuring stable operation and extended service life
Reduced temperature rise and noise： Advanced core design lowers operating temperature and noise levels
Sealed tank design： Prevents oil oxidation and moisture ingress for maintenance-free long-term operation

Technical Parameters

General Specifications

Parameter	Value
Phase	Three-phase
Frequency	50 / 60 Hz
Primary voltage	10 kV / 35 kV
Secondary voltage	As specified
Vector groups	Dyn11, Yyn0, Yd11, YNd11
Winding material	Copper / Aluminum (optional)
Cooling method	ONAN (Oil Natural Air Natural)
Insulation medium	Mineral oil
Standards	IEC 60076, GB 1094

Insulation Levels

System kV	Um (kV)	Power Frequency Withstand (kV rms)	BIL (kV peak)
10	12	28	75
35	40.5	95	200

Short-Circuit Impedance

Vector Group	Typical Zk (%)
Dyn11 / Yyn0	4.0 – 6.0 (≤1600 kVA) / 6.0 – 8.0 (≥1600 kVA)
Yd11 / YNd11	6.5 – 8.0 (35 kV)

Loss and Current Data

Rated Capacity (kVA)	Voltage Class (kV)	No-Load Loss P₀ (W)	Load Loss Pk (kW) at 75 °C	No-Load Current I₀ (%)	Zk (%)
100	10	35	2.0	0.65	4.0
200	10	55	3.4	0.55	4.0
400	10	90	5.5	0.45	4.0
630	10	130	7.8	0.40	4.5
1000	10	185	10.5	0.35	4.5
1250	10	220	12.5	0.30	4.5
1600	10	260	14.5	0.30	5.0
2000	10	310	17.0	0.25	5.5
2500	10	370	20.0	0.25	6.0
100	35	45	2.0	0.65	6.0
200	35	70	3.4	0.55	6.0
400	35	110	5.5	0.45	6.0
630	35	155	7.8	0.40	6.5
1000	35	215	10.5	0.35	6.5
1250	35	255	12.5	0.30	6.5
1600	35	300	14.5	0.30	7.0
2000	35	350	17.0	0.25	7.0
2500	35	410	20.0	0.25	7.0

Applications

Utility distribution networks requiring low-loss, energy-efficient transformers
Industrial parks and commercial facilities
Renewable energy integration (solar, wind)
Data centers and other energy-efficiency-critical applications

Custom voltage ratings, capacities, impedance values, and accessory configurations are available on request. Contact Rockwill for application-specific design and quotation.

Documentation Resource Library distribution transformer

Public.

Rockwill Electric Group Profile

Brochure

English

PDF

Negotiable

Pricing calculator

Model

SH15-M-35

PDF

Rockwill Electric Group Profile

Warranty by

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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.