Special Transformer

Rectifier Transformer

A special-duty transformer coordinated with the rectifier topology, harmonic spectrum, phase shift, cyclic load and DC process requirements.

Rated voltage: Up to 35 kV input typical
Capacity range: 100 kVA–50 MVA
Standards basis: IEC 61378 and rectifier-system requirements
Typical application: electrolysis, met…

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Technical product selection

Typical Use

Where this product is used

electrolysis, metal processing, drives and industrial rectifier systems

Technical Data

Typical technical parameters

The published values define the normal selection range. Final ratings and interfaces are confirmed against the approved single-line diagram and destination requirements.

Design standardIEC 61378 and rectifier-system requirements

ConfigurationIndustrial and hazardous-duty applications

Applicable standards

IEC 61378 and rectifier-system requirements

Rated voltage

Up to 35 kV input typical

Rated capacity

100 kVA–50 MVA

System frequency

50 Hz or 60 Hz, as specified

Duty cycle and load

Defined from the connected process or load profile

Insulation system

Selected for electrical, thermal and environmental duty

Protection and enclosure

Six-, twelve- or multi-pulse arrangements; interphase options; oil or dry type

Application

electrolysis, metal processing, drives and industrial rectifier systems

Ambient and altitude

Confirmed from site conditions

Testing and inspection

Routine tests plus agreed type, special and third-party inspection requirements

Documentation

Drawings, data sheets, test reports, manuals and packing documents

These values are for product selection. Final guaranteed values are confirmed in the approved technical agreement.

Configuration

Details to confirm before production

Confirm these items so the quotation and product design match your project.

Connected process

Provide converter pulse number, harmonic spectrum, duty cycle, isolation requirement, motor starting or mining load data.

Electrical stress

Define repetitive overvoltage, DC components, short-circuit duty and non-sinusoidal current.

Thermal design

State continuous, cyclic and overload operation so winding current density and cooling can be selected correctly.

Environment and enclosure

Confirm indoor, outdoor, corrosive, dusty or hazardous-area conditions and the required certification basis.

Normal supply

Typical standard equipment

Duty-specific magnetic and winding design
Temperature monitoring
Terminal arrangement to suit the connected process
Earthing, lifting and rating plates
Routine test records

Project options

Common optional equipment

Electrostatic shielding
Multi-secondary or phase-shifting windings
Forced cooling
Special enclosure or explosion-protection construction
Process interlocks and communications
Third-party witness testing

Testing and Documents

Tests and documents supplied with the product

The required tests and documents are confirmed before the order is placed.

Routine verification

Tests required for each completed unit under the selected product standard.

Design and type evidence

Applicable type-test evidence or agreed design verification is reviewed during technical approval.

Special testing

Sound, temperature-rise, impulse, partial-discharge or other special tests are included only when specified.

Document package

Approved drawings, data sheets, test reports, manuals, packing list and agreed quality records.

A special-duty transformer coordinated with the rectifier topology, harmonic spectrum, phase shift, cyclic load and DC process requirements.

Product overview

Rectifier Transformer is configured for electrolysis, metal processing, drives and industrial rectifier systems. Apex coordinates technical review, qualified production, documentation and export delivery according to the approved project requirements.

Applications

electrolysis, metal processing, drives and industrial rectifier systems. Final design considers the system study, load profile, fault level, installation environment, efficiency targets and local grid requirements.

Quotation Information

What to include with your inquiry

Send the information you already have. Unknown items can be confirmed during technical review.

Connected process or load type
Rated power and voltage ratio
Frequency and duty cycle
Harmonic or converter data
Enclosure and protection requirements
Applicable standard or certification
Installation environment
Quantity
Destination country and delivery location

FAQ

Questions buyers usually ask

Why is load information essential for a special transformer?

Rectifier, isolation and mining duties can impose harmonics, DC components, cyclic loading, high inrush or environmental constraints that are not defined by kVA and voltage alone.

Which standard should be stated in the RFQ?

Use the project or utility standard stated in the specification. Where it is not defined, send the destination, system voltage and application so the appropriate IEC or ANSI/IEEE basis can be proposed.

Are guaranteed values the same as the website values?

No. Website values are selection guidance. Guaranteed performance is stated in the approved technical data sheet and commercial offer.

What information helps Apex respond faster?

A single-line diagram, load data, voltage ratio, capacity, quantity, installation conditions, destination and required delivery date provide the best starting point.

Applications

Choose equipment for the site and operating conditions.

View Applications →

Technical Articles

Product selection and application guides.

View Technical Articles →

TECHNICAL ARTICLE

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Rectifier Transformer

Where this product is used

Typical technical parameters

Details to confirm before production

Connected process

Electrical stress

Thermal design

Environment and enclosure

Typical standard equipment

Common optional equipment

Tests and documents supplied with the product

Routine verification

Design and type evidence

Special testing

Document package

Product overview

Applications

What to include with your inquiry

Questions buyers usually ask

Choose equipment for the site and operating conditions.

Product selection and application guides.

The Minimum Data Needed for a Reliable Transformer RFQ

Transformer Tests and Documentation Buyers Should Request

Compact Substation Layout: Design Before Packaging

Ready to request a quotation?

Where this product is used

Typical technical parameters

Details to confirm before production

Connected process

Electrical stress

Thermal design

Environment and enclosure

Typical standard equipment

Common optional equipment

Tests and documents supplied with the product

Routine verification

Design and type evidence

Special testing

Document package

Product overview

Applications

What to include with your inquiry

Questions buyers usually ask

Compare within this product family.

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Choose equipment for the site and operating conditions.

Product selection and application guides.

The Minimum Data Needed for a Reliable Transformer RFQ

Transformer Tests and Documentation Buyers Should Request

Compact Substation Layout: Design Before Packaging

Ready to request a quotation?