The type of discharge electrodes and electrode support are important. Small-diameter wires should be firmly supported at the top and connected to a weight heavy enough (11.4-kg weights for 9.1-m wires) to keep the wires from swaying. The bottom and top of each wire should be covered with shrouds to help minimize sparking and metal erosion at these points. Newer ESPs are generally using rigid-frame or rigid-electrode discharge electrodes
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