Durable 23zdkh085 CRGO Silicon Steel Current Transformer Iron Core for Distribution Transformer

Product Description

Product Description

 

Experience the epitome of craftsmanship with our Premium Quality & Fully Assembled Transformer Cores. These cores are designed for optimal performance and reliability.

• Utilize our engineering marvels with a Maximum Weight of Automatically Stacked Core reaching up to an impressive 60 Tons, ensuring robust and seamless performance.
• Our manually stacked cores exhibit unmatched durability with a staggering Maximum Weight capacity of 120 Tons, crafted for heavy-duty applications.
• Achieve unparalleled precision with our Precision Gap Limit at the Joint, finely tuned to be Less than 1.0mm for ultimate efficiency.
• Our meticulous engineering ensures Window Height Precision Accuracy maintained at an exacting ±1mm, guaranteeing consistency and perfection.
• Embrace precision with our Window Width Precision Accuracy, adhering to a stringent ±1mm, ensuring every detail aligns with your specifications.

We provide a tailored financial approach by meticulously calculating and updating the quotation based on your precise drawings. This ensures the highest accuracy, cost-efficiency, and alignment with your budget.Upon your confirmation, we take swift action to initiate production, meticulously following the detailed drawings you provide to ensure exact adherence to your specific requirements.

Our oriented silicon steel stands as a superior low-carbon silicon iron alloy, with a silicon content ranging from 0.5% to 4.5%. It offers outstanding high permeability, significantly reducing Joule loss in power equipment. This not only boosts efficiency but also promotes energy savings, thanks to its lower iron loss and high resistance coefficient.
Raw Material Excellence: We source Premium CRGO silicon steel from renowned providers Baosteel and WISCO, ensuring the highest quality for our products.

Type	Grade	Width	Max Core Loss@P1.7T/50Hz	Lamination Factor(%)	Min Induction@B800
Common Type	23Q110	35-1200mm	1.10w/kg	97.2	1.82T
	23Q120		1.20w/kg	97.2	1.82T
	27Q120		1.20w/kg	97.5	1.82T
	30G120		1.20w/kg	98	1.82T
High Induction Type	B20P085	35-1200mm	0.85w/kg	97	1.86T
	B23P085		0.85w/kg	97.2	1.88T
	B23P090		0.90w/kg	97.2	1.88T
	B23P095		0.95w/kg	97.2	1.88T
	B23P100		1.00w/kg	97.2	1.88T
	B27P095		0.95w/kg	97.5	1.89T
	B27P100		1.00w/kg	97.5	1.89T
	B30P120		1.20w/kg	98	1.89T
Domain Refined High Induction Type(Laser)	B20R070	35-1200mm	0.70w/kg	97	1.86T
	23RK085		0.85w/kg	97.2	1.88T
	B27RK085		0.85w/kg	97.5	1.89T

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FAQ

 

1. Which products can we provide?
CRGO mother coils, slit coils, transformer lamination, OEM transformer core.

2. Who are we?
We are a pioneering force in CRGO silicon steel products in China since 1988, and the exclusive user of Bao-steel. We have also established a joint laboratory with Baosteel.

3.How can we guarantee quality?
We adhere to the ISO9001:2015 Standard. Before placing an order, our engineers conduct thorough calculations. After production, we rigorously test each product before dispatch.

4. Why should you buy from us and not from other suppliers?
With over 30 years of experience in producing transformer cores, we utilize advanced German slitting and cutting systems, including the Georg 800 cross-cutting E-stack machine. Our annual transformer core production capacity exceeds 100,000 tons.

 

Purchasing a good-quality transformer core is critical because it directly affects no-load loss, efficiency, noise, temperature rise, and service life. Below is a practical, industry-oriented guide you can use when sourcing cores from any supplier.

 

1. Define Your Technical Requirements First

Before contacting suppliers, be very clear about:

(a) Electrical parameters

• Transformer type: distribution / power / dry-type / amorphous

• Rating (kVA / MVA)

• Frequency: 50 Hz or 60 Hz

• Voltage class

• Target no-load loss (W) and exciting current (%)

• Noise limits (especially for distribution transformers)

(b) Core structure

• Core type: 3-leg, 5-leg, shell type

• Joint type: step-lap (preferred) or mitred

• Stacking factor requirement (≥ 0.97 for GO steel)

• Lamination thickness:

  • GO silicon steel: 0.23 / 0.27 / 0.30 mm

  • Amorphous: ~0.025 mm

 

2. Select the Right Core Material

(a) Grain-Oriented Silicon Steel (GOES)

Key points:

• Use Hi-B or Laser-scribed Hi-B

• Check steel brand and grade:

  • Examples: 23ZH90, 23ZH100, 27Q120, 30Q130

• Request original mill test certificate (MTC)

Important parameters to verify:

• Core loss (W/kg) @ 1.7 T

• Magnetic induction (B800 or B1000)

• Aging factor

• Coating type (C-5 / C-6)

(b) Amorphous Alloy (for ultra-low loss)

• Confirm alloy brand and ribbon source

• Check annealing process and brittleness control

• Ensure supplier has experience in amorphous cut-core handling

 

3. Evaluate the Core Manufacturer (Very Important)

A good core is not only about steel-it's about processing capability.

Ask about:

• Core cutting line (Georg, Föppl, or equivalent)

• Automatic step-lap cutting & stacking

• Annealing furnace (temperature control & atmosphere)

• Quality inspection equipment

Factory quality system:

• ISO 9001 mandatory

• ISO 14001 / ISO 45001 preferred

• Experience with utility / EPC / export projects

 

4. Key Quality Checks Before Purchase

Request the following before mass order:

(a) Prototype or sample core test

Ask for:

• No-load loss (W)

• Exciting current (%)

• Noise level (dB)

• Core weight & dimensions

(b) Documentation

• Steel MTC from original mill

• Core loss test report

• Dimensional drawing

• Packing & rust-prevention method

(c) Joint & stacking inspection

• Step-lap consistency

• No burrs on lamination edges

• Uniform pressure on yokes

• Proper insulation coating (no peeling)

 

5. Packaging & Logistics (Often Overlooked)

Poor packing can destroy a good core.

Ensure:

• Anti-rust protection (VCI paper / oil film)

• Strong wooden crate with shock protection

• No lamination displacement during transport

• Moisture protection for sea shipment

 

6. Supplier Qualification Checklist (Quick Use)

Uses branded GO steel (not mixed grades)
Provides mill certificates
Has step-lap cutting lines
Offers loss guarantee (contractual)
Supports FAT / third-party inspection
Has stable export experience

 

7. Recommended Purchasing Process

1. Shortlist 2-3 qualified core manufacturers

2. Compare technical proposal, not only price

3. Request sample core or reference projects

4. Place trial order

5. Approve supplier for long-term cooperation

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