Primary Voltage: 480V
Secondary Voltage: 208Y/120V
Rated Capacity: 75 kVA, customizable
Connection Group: Dyn11 (Delta primary, Wye secondary with neutral tap); other wiring configurations available
Transformer Type: Harmonic Mitigating Isolation Transformer
Standards: ANSI/IEEE, CSA/CAN, U.S. DOE Energy Efficiency Standards
Certifications: UL, cUL, CSA, SGS, CE
CHBEB is a professional manufacturer of transformers, outdoor vacuum circuit breakers, distribution boxes, and other power equipment. The company has various professional technical engineers, a modern mold manufacturing center and technology center, as well as advanced digital testing equipment for complete electrical products, enabling its new product development and technological innovation capabilities to reach an advanced level.
CHBEB will continue to improve itself. While focusing on product research and development, the company continuously strengthens quality management. With reliable quality, competitive prices, and comprehensive after-sales service, CHBEB sincerely cooperates with customers at home and abroad to create a better future together.
CHBEB’s 75 kVA three-phase isolation transformer adopts a complete electrical isolation design between the primary and secondary windings. Energy is transmitted through electromagnetic induction, effectively avoiding direct electrical connection between the input and output sides, improving the power supply safety of the control system and preventing safety hazards such as leakage and short circuits. Especially in control circuits, although 24V is considered a safe voltage, risks may still exist if voltage reduction is performed without isolation. This transformer features a well-designed isolation structure, with complete electrical isolation between input and output, protecting the safety of the entire control system.
High-Efficiency Cooling Fan
Rapid heat dissipation, ensuring stable transformer operation with long-term low temperature performance.
Simple Panel Design
Simplified design for clear operation and a more focused user experience.
Stable Internal Operation
Precision winding, dust-proof and shock-resistant design, reducing energy loss and extending service life.
In the industrial field, the 75 kVA three-phase isolation transformer can be used for equipment with high requirements for power supply stability, such as large motors and precision instruments. It can effectively isolate noise and interference in the power supply and protect the normal operation of equipment.
In medical equipment applications, the isolation transformer can effectively isolate power interference, reduce the risk of leakage current, ensure the safe use of medical equipment, and protect the safety of medical staff and patients.
In electronic equipment manufacturing workshops, it can prevent interference between different circuits and ensure the quality and performance of electronic products.
For places with high requirements for power quality, such as research laboratories and communication equipment rooms, the isolation transformer can reduce external interference through electrical isolation technology, optimize the power supply environment, improve system stability, and ensure the efficient and safe operation of equipment.
| Parameter | Recommended Specification |
| Rated Capacity | 75 kVA |
| Transformer Type | Three-Phase Dry-Type Isolation Transformer |
| Input Voltage | 480V AC |
| Output Voltage | 480V AC |
| Voltage Ratio | 1:1 |
| Input Rated Current | Approx. 90.2A |
| Output Rated Current | Approx. 90.2A |
| Rated Frequency | 50 / 60 Hz; 60 Hz recommended for North America export |
| Phase | Three Phase |
| Connection Group | Δ/Y connection, Dyn11 recommended; Δ/Δ or Y/Y available on request |
| Output Neutral Line | N line available with Dyn11 connection |
| No-load Current | ≤3% of rated current, approx. ≤2.7A |
| Short-Circuit Impedance | Approx. 4%–6%; 4% recommended |
| Voltage Regulation Rate | ≤3%–5% |
| Efficiency | ≥96%–98% |
| Insulation Class | Class F or Class H |
| Temperature Rise Class | ≤100K; Class F insulation with Class B temperature rise recommended |
| Power Frequency Withstand Voltage | Approx. 2.5kV AC/1 min between windings and ground; subject to certification standards |
| Insulation Resistance | ≥100MΩ, tested with 500V megohmmeter |
| Cooling Method | AN natural air cooling; AF forced air cooling optional for high-temperature environments |
| Protection Rating | Indoor IP20/IP23; outdoor IP54/IP55 recommended |
| Ambient Temperature | -10°C to +40°C; derating or enhanced cooling required for high-temperature regions |
| Altitude | ≤1000m; temperature rise and insulation correction required above 1000m |
| Noise | Typically ≤55–60 dB |
| Shielding Layer | Electrostatic shielding layer between primary and secondary windings with separate grounding recommended |
| Applicable Standards | IEC 60076 series, IEC 61558 series; UL 1561 / CSA available for North America |
STEP 1
Contact Our Team
Via Email or WhatsApp
›
STEP 2
Submit Requirements
Your customized technical requirements
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STEP 3
Receive Quotation
Official quotation from CHBEB
STEP 4
Confirm Full Solution
Technical parameters, electrical schemes, lead time and export terms
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STEP 5
Pay Advance Deposit
Secure your order
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STEP 6
Commence Production
Manufacturing begins
We will reply to you within 1–2 business days.Please pay attention to the email with the suffix”@chbebpower.com”.
