The ratings on the transformer nameplate refer to some important electrical parameters and performance indicators of the transformer. Usually includes the following aspects:
Rated capacity: The rated capacity of a transformer refers to the maximum load of electrical power that the transformer can continuously supply. For example, a 10MVA transformer means that the maximum load of the transformer can reach 10MW.
Rated voltage: The rated voltage of the transformer refers to the design voltage of the transformer. For example, a 220kV/110kV transformer means that the input voltage of the transformer is 220 kV and the output voltage is 110 kV.
Rated frequency: The rated frequency of the transformer refers to the power frequency for which the transformer is designed. In China, the power frequency is usually 50 Hz.
Short-time withstand current: The short-time withstand current of a transformer refers to the maximum current value that the transformer can withstand in a short period. For example, a transformer's short-term withstand current is 50kA, which means that the transformer can withstand an instantaneous current of up to 50kA.
Insulation level: The insulation level of a transformer refers to the insulation performance of the transformer at the time of design. For example, a 220kV transformer means that the transformer's design insulation voltage is 220 kV.
Cooling method: The cooling method of the transformer refers to the heat dissipation method of the transformer. For example, transformers can dissipate heat through natural cooling, forced air cooling, or forced water cooling.
To sum up, the ratings on the transformer nameplate refer to some important electrical parameters and performance indicators of the transformer, which are of great significance for the selection, installation, and operation of the transformer.