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Shaft Grounding, Diagram, Installation


Overview of rope guide, attachment arm, and high-frequency drain shaft grounding assembly components, including a diagram of locations and installation procedure.

Installation Overview

The following figure shows the Shaft Grounding Assembly installed. The installation consists of these main parts:

  • Rope guide (A). The portion of the Shaft Grounding Assembly that lays over the shaft and holds the grounding and metering ropes.

  • Attachment arm (B). A pipe that connects the Shaft Grounding Assembly to the unit housing. In the figure, the attachment arm is concealed by the High-Frequency Drain resistor (C), which is mounted on the attachment arm.

  • High-Frequency Drain (C). An alternate ground path for high-frequency voltage spikes that includes a resistor wired in series.In the figure, it is mounted on the attachment arm.


These are the main tasks in the installation procedure:

  1. Installing the attachment arm. The length of the attachment arm varies with each installation, so you must temporarily place the Shaft Grounding Assembly on the shaft in order to measure the required length of the attachment arm. The attachment arm is then cut to size, inserted into the mounting hardware, and locked in position with set screws. The attachment arm and Shaft Grounding Assembly are then removed from the unit so that the attachment arm can be welded into the proper angled position. After welding, the entire Shaft Grounding Assembly is secured to the unit.

  2. Securing the rope guide. The rope guide must be precisely positioned to match the contour of the shaft. This is accomplished by tightening bolts at the top of the rope guide.

  3. Installing the High-Frequency Drain. THe HFD resistor must be mounted and wired.

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