400 HZ ISOLATION TRANSFORMER 400 KVA, 10055L3

The L/C Magnetics 400 kVA, 400 Hz Isolation Transformer is designed to provide dependable galvanic isolation and stable power delivery for high-frequency electrical systems. Constructed with copper windings and a Class H insulation system, this transformer offers high efficiency, low losses, and reliable performance in demanding industrial, aerospace, and military environments.

Electrical Ratings & Performance

• Rated Power: 400 kVA
• Phase: Three Phase
• Frequency: 400 Hz
• Primary Voltage: 440 VAC L-L, Delta
• Secondary Voltage: 440 VAC L-L, Delta
• Rated Current: 525 Amps
• Efficiency: ≥ 98% at full load
• Voltage Regulation: ≤ 3% at full load
• Typical Impedance: 5–6% (application dependent)

Construction Features

• High-quality copper windings for electrical conductivity and thermal performance
• Grain-oriented silicon steel core optimized for 400 Hz operation
• Class H insulation system providing increased thermal margin and long service life
• Precision coil and core assembly to minimize losses and leakage reactance
• Robust mechanical bracing to withstand electrical and mechanical stresses

Cooling System

• AN/AF cooling (Air Natural / Air Forced)
• Designed for continuous operation at rated load under normal ambient conditions
• Forced-air cooling available for enhanced thermal performance when required

Safety & Isolation

• Full electrical isolation between primary and secondary windings
• Designed to handle inrush currents and short-circuit conditions typical of 400 Hz systems
• Grounding provisions provided for safe system integration
• Optional thermal monitoring and protective devices available upon request

Mechanical Characteristics

• Indoor Enclosure: NEMA 1
• Approximate Dimensions: 52.0” W × 31.5” D × 67.0” H (or TBD)
• Approximate Weight: 2866 lbs (or TBD)
• Durable industrial-grade finish for indoor environments

Standards & Quality

• Designed and manufactured in accordance with applicable IEEE C57 standards
• Construction aligned with NEMA guidelines
• RoHS-compliant materials available upon request

Typical Applications

• Aerospace ground power systems
• Military and defense power equipment
• Aircraft maintenance and test facilities
• High-frequency industrial power distribution
• Laboratory and research installations

The diagram of the transformer is shown below:

The photo of the indoor enclosure (52.0” W x 31.5” D x 67.0” H) is shown below:

Custom Engineering Available

L/C Magnetics specializes in custom transformer solutions. Voltage configurations, impedance levels, shielding options, and monitoring accessories can be tailored to meet specific application requirements.

To discuss your specific application, please call our number at (714) 624-4740, or send us an email at quote@lcmagnetics.com.