在额定电流范围内能限制最大使用功率；电卡能双向传递数据；电量为零时，自动拉闸断电。
In the scope of internal limits maximum rated current power, Electricity can transfer data bidirectional, Electricity is zero, automatic switch off.
电气设备和载流导体的选择、继电保护、自动装置的整定、限制短路电流措施的确定都需进行短路电流的计算。
The short circuit current calculation is required for choosing equipment and current carrying conductor, setting of the rely and automation, confirmation of the short circuit current limiting method.
当电流超过限制值时，过负荷电流继电器自动保护振荡管和整流器，同时可以避免由不当操作所引起的频率漂移。
The over-current relay works to protect oscillation tubes and rectifier, when the current exceeds its limits. Frequency deviation caused by faulty operation is also prevented.
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