标题: 关于绞线盘的接地电阻(关键词:电源线接地电阻) [打印本页] 作者: q529891012 时间: 2011-12-1 13:41 标题: 关于绞线盘的接地电阻(关键词:电源线接地电阻) EN 61242中关于线盘的接地电阻的测量中,有如下规定:
9.7 Internal earthing circuit in cable reels, including any joints contacts and the like, shall be of low
electrical resistance.
Compliance is checked by the following measurement which is made after the test specified in Clause 21.
A current derived from an a.c. source, having a no load voltage not exceeding 12 V, and equal 1.5 times rated
current of the cable or 25 A, whichever is the greater, is passed through the earthing circuit.
The voltage drop is measured and the resistance calculated from the current and this voltage drop.
The resistance shall not exceed 0,05 Ω..