20kVA Split Phase Transformer, 110V/120V to 220V/240V

Q1: How do split phase isolation transformers prevent electric shock?

Split phase power transformers improve safety by electrically isolating the input and output windings, preventing users from directly contacting the power supply side and thus reducing the risk of electric shock. Simultaneously, they can disconnect the ground circuit, reducing the harm of leakage current to the human body. In practical applications, they are usually used in conjunction with grounding protection, circuit breakers, or leakage protection devices to further enhance electrical safety.

Q2: How to test a split phase isolation transformer?

Testing generally includes several steps: First, measure whether the input voltage is normal; then check whether the three-phase output voltage is balanced; next, use a multimeter or megohmmeter to check the winding resistance and insulation performance; at the same time, observe the operating status, such as for abnormal heating, noise, or vibration. 

Q3: How to connect a split phase transformer to a UPS?

The connection is usually in the structure of "grid (single phase) → phase isolation transformer → UPS → load," or adjusted according to the UPS type. It is necessary to ensure that the output voltage and number of phases of the 120v split phase transformer match the UPS input requirements and that the capacity is sufficient. At the same time, attention should be paid to grounding specifications and wiring sequence to avoid phase sequence errors or overload problems. For three-phase UPS systems, it should be specifically confirmed whether they support power supply from separate phases.