45 KVA Transformers

International & Specialty Voltage Configurations

In addition to standard 480V to 208Y/120V configurations, Bruce Electric can source 45 kVA transformers for a wide range of specialty, international, and non-standard voltage requirements used across industrial facilities, OEM equipment, export systems, and retrofit projects.

Common available configurations include:

• 480V to 208Y/120V

• 600V to 208Y/120V

• 480V to 480Y/277V

• 208V to 480Y/277V

• 240V to 480Y/277V

• 480V to 240/120V

• 400Y/231V

• 415Y/240V

• 380Y/219V

• 600Y/347V

Available transformer types may include dry type distribution transformers, encapsulated transformers, isolation transformers, harmonic mitigating transformers, autotransformers, low-noise transformers, and non-ventilated transformers. Availability varies by manufacturer, winding material, enclosure type, and application requirements.

We support contractors, engineers, facility managers, OEMs, and industrial buyers with transformer sizing assistance, voltage matching, replacement sourcing, and nationwide shipping across the United States.

45 kVA Transformer Specifications

The specifications below represent common configurations available across 45 kVA dry type transformers. Actual specifications vary by manufacturer, transformer design, enclosure type, winding material, and application requirements.

Bruce Electric also supports specialty and custom transformer configurations depending on manufacturer availability and application requirements.

DOE Efficiency Compliance for 45 kVA Transformers

All new 45 kVA dry type transformers supplied for U.S. applications must comply with DOE energy efficiency standards under 10 CFR Part 431. DOE-compliant transformers are designed to reduce core losses and improve operating efficiency, helping commercial and industrial facilities lower long-term energy costs. Bruce Electric supplies DOE-compliant transformer solutions for commercial buildings, manufacturing facilities, infrastructure projects, and electrical system upgrades.

45 kVA Transformer Amps

The amp output of a 45 kVA transformer depends on voltage and phase configuration.

Three-Phase Formula:

FLA = kVA × 1,000 ÷ (V × 1.732)

Single-Phase Formula:

FLA = kVA × 1,000 ÷ V

A 45 kVA transformer with a 480V primary and 208Y/120V secondary is one of the most common commercial distribution configurations used for panelboards, lighting loads, receptacle circuits, and HVAC systems.

45 kVA 3 Phase Transformers

A 45 kVA 3 phase transformer is commonly used in commercial and industrial power distribution systems where balanced three-phase power is required. Three-phase 45 kVA transformers are frequently installed in:

• Commercial office buildings

• Retail facilities

• HVAC systems

• Manufacturing equipment

• Motor control centers

• Schools and universities

• Healthcare facilities

• Construction and temporary power systems

• Industrial process equipment

Bruce Electric supplies three-phase 45 kVA transformers in ventilated, encapsulated, low-noise, harmonic mitigating, and non-ventilated designs for indoor and outdoor installations.

45 kVA Step-Up and Step-Down Transformers

45 kVA transformers are available for both step-up and step-down voltage conversion applications.

Common Step-Down Configurations

Common Step-Up Configurations

Many dry type transformers can support reverse-feed operation when properly configured and approved by the manufacturer.

45 kVA Isolation Transformers

45 kVA isolation transformers are commonly used to separate sensitive electrical equipment from the primary power source while reducing electrical noise, transient voltage disturbances, and grounding issues.

Typical isolation transformer applications include:

• Medical equipment

• Data centers

• Industrial automation systems

• CNC machinery

• Audio/video systems

• UPS systems

• Sensitive electronic loads

Bruce Electric offers isolation transformer solutions from leading transformer manufacturers for commercial and industrial applications.

45 kVA Transformer Dimensions and Weight

Transformer dimensions and weight vary depending on manufacturer, enclosure type, winding material, and transformer construction.

Typical 45 kVA Transformer Weight

Typical 45 kVA Transformer Dimensions

Always verify certified outline drawings and manufacturer specifications before installation planning.

45 kVA Transformer Load Capacity

A 45 kVA transformer provides 45,000 VA (volt-amperes) of apparent power capacity for commercial and industrial electrical distribution systems. Actual load capacity depends on voltage, phase configuration, power factor, ambient temperature, and application type.

General load guidance includes:

• Nameplate capacity: 45 kVA

• Recommended continuous loading: approximately 80%

• Suitable for panel distribution, HVAC systems, lighting loads, motor loads, and equipment feeds

• Available in both single-phase and three-phase configurations

Bruce Electric can help determine the correct transformer sizing and voltage configuration based on your application requirements and load calculations.

45 kVA Transformer Installation Considerations

When installing a 45 kVA transformer, important considerations include:

• NEC clearance requirements

• Ventilation and airflow

• Indoor and outdoor installation environment

• NEMA enclosure selection

• Conductor sizing and overcurrent protection

• Noise-sensitive installation areas

• Voltage compatibility

• Future load expansion capacity

Outdoor or harsh-environment installations may require NEMA 3R or stainless-steel transformer enclosures.

Applications of 45 kVA Dry Type Transformers

45 kVA transformers are commonly used across:

• Commercial buildings

• Retail stores

• Restaurants

• Schools and universities

• Healthcare facilities

• Manufacturing plants

• Industrial automation systems

• HVAC equipment

• Lighting distribution systems

• Panelboards and branch circuits

• Data centers and IT rooms

• Construction projects

• OEM machinery systems

Bruce Electric supplies dry type transformers for commercial, industrial, institutional, and OEM applications throughout the United States.

Why Choose Bruce Electric for 45 kVA Transformers

Bruce Electric has supplied dry type transformers and electrical distribution equipment since 1973. We provide:

• New 45 kVA transformers available online

• Custom sourcing for used and reconditioned transformers

• Multiple voltage configurations

• Step-up and step-down transformer solutions

• Isolation and harmonic mitigating transformers

• Copper and aluminum winding options

• Indoor and outdoor transformer configurations

• Technical support for sizing and compatibility

• Nationwide shipping across the United States

Our team works with contractors, engineers, maintenance teams, procurement departments, OEM manufacturers, and facility managers to help source reliable transformer solutions for both new installations and replacement applications.

Frequently Asked Questions

Q1. How many amps does a 45 kVA transformer put out?

A 45 kVA transformer at 480V three-phase outputs approximately 54 amps at full load. A 208Y/120V three-phase secondary outputs approximately 125 amps. Actual amp output depends on voltage and phase configuration.

Q2. How much does a 45 kVA transformer weigh?

Most 45 kVA dry type transformers weigh between approximately 300 and 650 lbs depending on winding material, enclosure type, and transformer design.

Q3. What is a 45 kVA transformer used for?

45 kVA transformers are commonly used for commercial power distribution, HVAC systems, lighting systems, industrial equipment, panelboards, schools, healthcare facilities, and OEM machinery applications.

Q4. What is the most common 45 kVA transformer configuration?

One of the most common configurations is 480V primary to 208Y/120V secondary for commercial building power distribution.

Q5. Does Bruce Electric sell used 45 kVA transformers?

Bruce Electric primarily lists new electrical equipment online. Used, surplus, and reconditioned 45 kVA transformers are available through our RFQ and custom sourcing process.

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