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Operating frequency

Transformer core loss and frequency is very much related, so it should be designed and used according to the frequency of use, this frequency is called working frequency.

Rated power

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

Rated voltage

Refers to the voltage allowed to be applied on the coil of the transformer, which shall not be greater than the specified value during operation.

Voltage ratio

Refers to the ratio of primary voltage and secondary voltage of the transformer, there are differences between no-load voltage ratio and load voltage ratio.

No-load current

Transformer secondary open circuit, the primary still has a certain current, this part of the current is called no-load current. The no-load current consists of magnetization current (which produces magnetic flux) and iron loss current (caused by loss of iron core). For a 50Hz power transformer, the no-load current is basically equal to the magnetizing current.

No-load loss

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

efficiency

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

Insulation resistance

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