Step-up Transformer

Product Specifications

Technical details and manufacturing context for Step-up Transformer

Definition

A step-up transformer is a critical component within a charging circuit that increases the input voltage to a higher output voltage level required for efficient charging operations. It typically consists of primary and secondary windings wound around a magnetic core, with the secondary winding having more turns than the primary to achieve voltage amplification. This product is used in electrical equipment manufacturing, specifically as a component in power systems where voltage levels need to be raised for transmission or specific applications. The transformer operates on electromagnetic induction principles, with the voltage ratio determined by the turns ratio. Key parameters include rated power (50–2500 kVA), primary voltage (6.3–35 kV), secondary voltage (35–110 kV), frequency (50–60 Hz), impedance voltage (6–12%), no-load loss (0.5–5 kW), load loss (5–30 kW), efficiency (98–99.5%), insulation class (A–H), temperature rise (55–65 K), cooling method (ONAN–OFAF), degree of protection (IP54–IP65), ambient temperature (-40–85 °C), and weight (500–15000 kg). These values are reference ranges and must be verified with the manufacturer for specific models. Materials typically include silicon steel core, copper windings, insulation materials, and transformer oil if oil-cooled. Standards such as IEC 60076 and IEC 60085 are referenced for verification. Selection should consider load demand, grid compatibility, and environmental conditions. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The step-up transformer operates on electromagnetic induction. When alternating current flows through the primary winding, it creates a changing magnetic field in the core. This changing magnetic field induces a voltage in the secondary winding. The voltage ratio between primary and secondary windings is proportional to the turns ratio (N_secondary/N_primary), allowing voltage step-up while maintaining power conservation (minus losses). The core is typically made of silicon steel to concentrate the magnetic flux, and the windings are copper for low resistance. The transformer must be designed to handle the rated power and voltage levels without exceeding insulation temperature limits.

Common Materials

Silicon steel core, Copper windings, Insulation materials, Transformer oil (if oil-cooled)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Power	50–2500 kVA	Select based on load demand and future expansion.IEC 60076
Primary Voltage	6.3–35 kV	Must match grid or generator output.IEC 60076
Secondary Voltage	35–110 kV	Higher than primary for step-up application.IEC 60076
Frequency	50–60 Hz	Must match system frequency.IEC 60076
Impedance Voltage	6–12 %	Affects voltage regulation and fault current.IEC 60076
No-Load Loss	0.5–5 kW	Lower is better for efficiency.IEC 60076
Load Loss	5–30 kW	Depends on winding resistance and load.IEC 60076
Efficiency	98–99.5 %	Higher efficiency reduces operating cost.IEC 60076
Insulation Class	A–H	Determines maximum operating temperature.IEC 60085
Temperature Rise	55–65 K	Must not exceed insulation class limit.IEC 60076
Cooling Method	ONAN–OFAF	ONAN natural, OFAF forced oil/air.IEC 60076
Degree of Protection	IP54–IP65	Higher IP for outdoor or harsh environments.IEC 60529
Ambient Temperature	-40–85 °C	Operating range for reliable performance.IEC 60076
Weight	500–15000 kg	Consider for transportation and installation.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Magnetic Core Part
Provides a low-reluctance path for magnetic flux and supports the windings

Material: Silicon steel laminations
Primary Winding Part
Receives input electrical energy and creates magnetic flux in the core

Material: Copper conductor with insulation
Secondary Winding Part
Induces output voltage through electromagnetic induction from the core's changing magnetic field

Material: Copper conductor with insulation
Insulation System Part
Provides electrical isolation between windings and between windings and core

Material: Paper, varnish, or synthetic insulation materials

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Charging Circuit

View system integration details

High Voltage Generator

View system integration details

Manufacturers of Step-up Transformer

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

IHUA INDUSTRIES CO.,LTD.

Guangdong, CN

Also makes: High-Frequency Transformer, High-Voltage Transformer, AC-DC Converter and 8 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the typical voltage range for a step-up transformer?

The primary voltage typically ranges from 6.3 to 35 kV, and the secondary voltage from 35 to 110 kV, as per reference ranges. Exact values depend on the specific model and application.

What standards apply to step-up transformers?

Common standards include IEC 60076 for power transformers and IEC 60085 for insulation. These standards provide guidelines for testing and performance. Always verify compliance with the manufacturer.

How do I select the right rated power?

Rated power should be selected based on load demand and future expansion. The reference range is 50–2500 kVA. Consult the manufacturer to match your specific requirements.

What cooling methods are available?

Cooling methods range from ONAN (natural oil and air) to OFAF (forced oil and forced air). The choice depends on the application and environmental conditions. Verify with the supplier.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Step-up Transformer

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Atmospheric to 1.5 bar (typical enclosure pressure rating)
other spec:	Humidity: 0-95% RH non-condensing, Altitude: Up to 3000m, Insulation Class: H (180°C) typical
temperature:	-40°C to +150°C (ambient/operating temperature range)

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards