PT secondary voltage step-down is one of the reason which causes the comprehensive error of the electric energy metering equipment.
而PT二次压降又是引起电能计量装置综合误差的直接原因之一。
The secondary system consists of step-down transformers and secondary circuits at utilization voltage levels.
二次配电系统是由降压变压器和满足最终用电设备电压等级的二次电路组成。
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