working frequency
The core loss of transformer is closely related to the frequency, so it should be designed and used according to the use frequency, which is called the working frequency.
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.
Rated voltage
It refers to the voltage allowed to be applied on the coil of transformer, which shall not be greater than the specified value during operation.
Voltage ratio
It refers to the ratio of primary voltage and secondary voltage of transformer. There is difference between no-load voltage ratio and load voltage ratio.
No load current
When there is no-load current, it is called primary open current. The no-load current is composed of magnetization current (producing magnetic flux) and iron loss current (caused by iron core loss). For the 50 Hz power transformer, the no-load current is basically equal to the magnetization current.
No load loss
It refers to the power loss measured at the primary when the secondary of the transformer is open. The main loss is the core loss, followed by the loss of no-load current on the primary coil copper resistance (copper loss), which is very small.
efficiency
It refers to the percentage of the ratio of secondary power P2 to primary power P1. Generally, the higher the rated power of transformer, the higher the efficiency.
insulation resistance
It refers to the insulation performance between the coils of the transformer and between the coils and the iron core. The insulation resistance is related to the performance, temperature and humidity of the insulation material
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