A 3 phase isolation transformer transfers AC power between two electrically separated three-phase circuits through electromagnetic induction. Its primary and secondary windings share a magnetic core but have no direct conductive connection, providing galvanic isolation between the incoming supply and the connected load.
The transformer can use an approximately 1:1 ratio when isolation is the main requirement. It can also step voltage up or down when the facility supply does not match the rated voltage of the equipment. The required winding ratio, connection group, neutral arrangement, grounding method, capacity, and protection must be selected for the actual system.
JINMA ELECTRIC offers ZFSG three-phase isolation transformer solutions for industrial machinery, automation equipment, data centers, photovoltaic energy storage, rail transit, commercial equipment, and other applications requiring electrical separation or voltage matching.
| Model | Rated Capacity (kVA) | Input/Output Voltage | Enclosure Dimensions (mm) | Weight (kg) |
| ZFSG-5 | 5 | 380 V / 220 V | 270 × 410 × 370 | 20 |
| ZFSG-8 | 8 | 380 V / 220 V | 300 × 450 × 420 | 23 |
| ZFSG-10 | 10 | 380 V / 220 V | 300 × 450 × 420 | 30 |
| ZFSG-12 | 12 | 380 V / 220 V | 350 × 500 × 500 | 34 |
| ZFSG-15 | 15 | 380 V / 220 V | 350 × 500 × 500 | 37 |
| ZFSG-20 | 20 | 380 V / 220 V | 350 × 500 × 500 | 47 |
| ZFSG-25 | 25 | 380 V / 220 V | 420 × 600 × 580 | 52 |
| ZFSG-30 | 30 | 380 V / 220 V | 420 × 600 × 580 | 57 |
| ZFSG-40 | 40 | 380 V / 220 V | 420 × 600 × 580 | 77 |
| ZFSG-50 | 50 | 380 V / 220 V | 450 × 680 × 710 | 83 |
| ZFSG-60 | 60 | 380 V / 220 V | 450 × 680 × 710 | 93 |
| ZFSG-80 | 80 | 380 V / 220 V | 550 × 800 × 820 | 123 |
| ZFSG-100 | 100 | 380 V / 220 V | 550 × 800 × 820 | 135 |
| ZFSG-120 | 120 | 380 V / 220 V | 1050 × 750 × 1400 | 145 |
| ZFSG-150 | 150 | 380 V / 220 V | 1050 × 750 × 1400 | 198 |
| ZFSG-200 | 200 | 380 V / 220 V | 1050 × 750 × 1400 | 275 |
| ZFSG-250 | 250 | 380 V / 220 V | 1200 × 800 × 1500 | 296 |
| ZFSG-300 | 300 | 380 V / 220 V | 1200 × 800 × 1500 | 360 |
| ZFSG-350 | 350 | 380 V / 220 V | 1200 × 800 × 1500 | 420 |
| ZFSG-400 | 400 | 380 V / 220 V | 1350 × 850 × 1500 | 560 |
| ZFSG-500 | 500 | 380 V / 220 V | 1350 × 850 × 1500 | 610 |
Provide voltage matching and electrical separation for production machinery, CNC systems, robotic cells, assembly lines, packaging equipment, and other three-phase industrial loads.
Create a dedicated power boundary for PLC panels, control systems, drives, instruments, and automation equipment where grounding coordination or interference management is important.
Support three-phase power distribution for servers, UPS systems, electronic equipment, and facility infrastructure when the electrical design requires galvanic isolation or a separately derived supply.
Integrate photovoltaic inverters or energy-storage converters with a grid or load when isolation and voltage conversion are required. The transformer must match the inverter topology, harmonic profile, grounding scheme, and local grid rules.
Adapt machinery designed for a different regional voltage while retaining separate windings between the facility supply and the equipment. Company materials reference projects involving 480V, 600V, 440V, and 380V systems; each configuration requires confirmation.
Supply rail transit, commercial equipment, public-utility systems, and other installations where a three-phase isolated power source forms part of the project design.
No. A 1:1 ratio is common when isolation is the main objective, but a three-phase isolation transformer can also step voltage up or down by using different primary and secondary turns.
It can reduce the transfer of certain common-mode and high-frequency disturbances. Performance depends on the winding design, shielding, grounding, installation, and disturbance frequency. Additional filters or surge-protection devices may be necessary.
No. A conventional isolation transformer follows its fixed winding ratio and normal voltage regulation characteristics. Use a voltage stabilizer when active correction of input-voltage variation is required.
No. A conventional transformer cannot change 50 Hz power to 60 Hz or vice versa. A suitable frequency converter is required for frequency conversion.
