Precautions for operating the transformer ratio and group tester:
1. Please read this instruction manual carefully before use.
2. This instrument can be used indoors or outdoors, but avoid places with rain, corrosive gases, excessive dust, high temperature, direct sunlight, etc.
3. When wiring, pay attention that the high-voltage side and low-voltage side leads cannot be connected in reverse.
4. After the instrument is turned on, do not short-circuit or ground the test leads with each other; unused lead clips must be left suspended.
5. When wiring the instrument, note that the yellow, green, red, and black colors correspond to the A, B, C, O three-phase terminals and neutral point terminal of the transformer, respectively; do not connect them incorrectly.
6. Maintenance and adjustment of the instrument should be carried out by professionals
