Primary Voltage: 480V
Secondary Voltage: 208Y/120V
Power Rating: 10 ~ 2000 KVA or customize
Connection Type: Dyn11 (Delta-Primary, Wye-Secondary with neutral), or other configurations
Transformer Type: Dry Type Isolation Transformer
Standards: ANSI/IEEE, CSA/CAN, DOE
Certificates: UL, cUL, CSA, SGS, CE
Three-phase isolation transformers are essentially a type of isolation transformer. Compared with single-phase transformers, they not only protect sensitive equipment and block voltage spikes, harmonics, and transient surges from the power grid, but also provide higher transmission efficiency and lower losses.
Due to the fact that both the input and output of three-phase isolation transformers are three-phase AC power, they feature larger capacity and higher efficiency. Generally, the output power of three-phase isolation transformers is above 7 kW.
Isolation transformers were first used in Europe. What are the differences between isolation transformers and other types of transformers?
Differences in Additional Functions
Conventional Transformers
Isolation Transformers
CHBEB Group specializes in transformer manufacturing and has more than 60 years of experience. From Beijing to Zhejiang, we have grown alongside the development of China’s manufacturing industry. Our isolation transformers are widely used around the world.
From the development of cities across China’s 31 provinces, from north to south, to urban construction projects in Vietnam, Pakistan, Kyrgyzstan, the UAE, and Saudi Arabia, CHBEB products can be found in many applications.
Three-phase isolation transformers are widely used in industrial automation, precision machining, imported and exported equipment, laboratories, and other fields.
| Item | Common Parameters |
| Type | Three-Phase Epoxy Resin Cast Dry-Type Transformer |
| Energy Efficiency Class | NX1 / Class 1 Energy Efficiency |
| Rated Capacity | 30kVA – 2500kVA common; customizable per project |
| Rated Frequency | 50 Hz / 60 Hz |
| Primary Rated Voltage | 6kV / 10kV / 10.5kV / 11kV etc. |
| Secondary Rated Voltage | 0.4kV / 0.415kV / 0.69kV etc. |
| Common Voltage Ratio | 10/0.4kV |
| Tap Changer Type | Off-circuit (no-excitation) tap changing |
| Tap Range | ±2×2.5% or ±5% |
| Vector Group | Dyn11 most common; Yyn0, Yd11 also available |
| Insulation Class | Class F / Class H |
| Cooling Method | AN natural air cooling; AF forced air cooling optional |
| Protection Rating | IP00 / IP20 / IP23 / IP30 / IP40 etc. |
| Impedance Voltage | Approx. 4%–6%, varies with capacity |
| No-load Current | Typically approx. 0.5%–1.5% |
| Noise Level | Approx. 45–60 dB, varies with capacity |
| Operating Environment | Indoor; altitude ≤1000m standard; derating required above 1000m |
| Applicable Scenarios | Distribution rooms, commercial complexes, factories, schools, hospitals, data centers etc. |
We will reply to you within 1–2 business days.Please pay attention to the email with the suffix”@chbebpower.com”.
