1 Working frequency:

Transformer core loss has a great relationship with frequency, so it should be designed and used according to the frequency of use, that is, the operating frequency.

2 Rated power:

Under the specified frequency and voltage, the transformer can work for a long time without exceeding the output power of the specified temperature rise.

3 Rated voltage:

Refers to the voltage allowed to be applied to the transformer coil, and the voltage shall not exceed the specified value during operation.

4 Voltage ratio:

Refers to the ratio of transformer primary voltage to secondary voltage, which is different from the no-load voltage ratio and the load voltage ratio.

5 No-load current:

When the transformer secondary is open, there is still a certain current in the primary, which is called no-load current. No-load current is composed of magnetizing current (generating magnetic flux) and iron loss current (caused by iron core loss). For a 50Hz power transformer, the no-load current is basically equal to the magnetizing current.

6 No-load loss:

Refers to the power loss measured at the primary of the transformer when the secondary is open. The main loss is core loss, followed by the loss (copper loss) caused by the no-load current on the copper resistance of the primary coil, which is very small.

7 Efficiency:

Refers to the percentage of the ratio of the secondary power source P2 to the primary power source P1. Generally speaking, the higher the rated power of the transformer, the higher the efficiency.

8 Insulation resistance:

It indicates the insulation performance between each coil of the transformer and between each coil and the iron core. The insulation resistance is related to the performance, temperature and humidity of the insulating material used.