Installing the Grounding Wire | Series 1

Related Products:

EGSA-013, EGSA-017

Related Documents:

EZDP-2007

Type:

Installation

Keywords/Labels:

Shaft Grounding, Installation

Summary:

Summary of steps for installing the grounding wire.

Prepare the Grounding Wire and Twisted Pair Cables

  1. Drill and tap a 5/16 in-18 hole 3/4 in deep in a suitable grounding location on the outside of the unit case circle-a.png to attach the grounding ring terminal circle-b.png (3/8 in dia. terminal).

    EZDP-2007-InstallGroundTwisterPairCables-1.png
  2. Cut the supplied grounding cable circle-c.png and 4 twisted pair cable circle-d.png to the appropriate length. Route the cables to the Remote Meter Point box as shown in Route the Cables to the Remote Meter Point below.

    EZDP-2007-InstallGroundTwisterPairCables-2.png

Route the Cables to the Remote Meter Point

  1. Remove four screws from the corners of the faceplate. Remove the faceplate to reveal the terminal connectors inside the Remote Meter Point box.

  2. Route cables from the Shaft Grounding Assembly to the terminal connectors. If your wiring diagram differs from this one, contact Cutsforth Engineering Support.

    EZDP-2007-RouteTheCables-1-a.png

    Part

    Description

    Part

    Description

    circle-a.png

    To and From Ground Current Test Point

    circle-b.png

    To Shaft Voltage Test Point

    circle-c.png

    To Meter Rope Test Point

    circle-d.png

    To Ground Rope Test Point

    circle-e.png

    Screw-down Jumper

    circle-f.png

    From Shaft Grounding Assembly

    circle-g.png

    To Unit Case Ground

    circle-h.png

    Black Wires & Drain from each Twisted Pair

    circle-i.png

    From Meter Rope

    circle-j.png

    From Meter Rope Wear Indicator

    circle-k.png

    From Ground Rope Wear Indicator

Only qualified electrical personnel should take measurements at the remote test points (circle-a.png = Ground Rope, circle-b.png = Meter Rope). For any of the test points located on the faceplate of the Remote Meter Point, use a hand-held volt meter, oscilloscope, clamp-on ammeter, or other appropriate testing device. Always follow proper electrical safety procedures. 

EZDP-2007-RouteTheCables-2.png

Complete a Shaft Grounding Continuity Test for the Shaft Grounding Assembly

Complete a shaft grounding continuity test before you connect the Shaft Grounding Assembly to the Remote Meter Point (ropes removed):

  1. With the Shaft Grounding Assembly installed, place the switch on the junction box assembly to "Run" mode.

  2. Strip all wires from the junction box assembly at the Remote Meter Point end and check that there is NO continuity between ANY wires.

  3. Check for continuity to determine which color wire is connected to the following:

    • Junction Box Assembly Metering Rope Holder Mount – Wire Color __________

    • Junction Box Assembly Metering Rope Wear Indicator Post – Wire Color __________

    • Junction Box Assembly Grounding Rope Wear Indicator Post – Wire Color __________

  4. Connect wires from the Junction Box Assembly to the Remote Meter Point.

  5. Check that there is continuity between the Remote Meter Point panel ground points and turbine ground.

  6. Check that there is continuity between the Remote Meter Point panel shaft voltage test point and the Shaft Grounding Assembly metering rope holder mount.

  7. Install the ropes in the Shaft Grounding Assembly.

  8. At the Remote Meter Point check that there is NO continuity between:

    • Grounding rope "wear indicator" test point and ground test point

    • Metering rope "wear indicator" and grounding test point

Complete a Shaft Grounding Continuity Test for the SCA

Complete a shaft grounding continuity test before you connect the SCA to the Remote Meter Point (ropes removed):

  1. Strip all wires from the SCA at the Remote Meter Point end and check that there is NO continuity between ANY wires.

  2. Check for continuity to determine which color wire is connected to:

    • SCA Metering Rope Holder Mount – Wire Color __________

    • SCA Metering Rope Wear Indicator Post – Wire Color __________

  3. Connect the case ground and SCA wires to the Remote Meter Point. If there is  no monitoring, run a small ground wire from the Remote Meter Point ground terminals to the unit case.

  4. At the Remote Meter Point panel confirm that there is continuity between the Remote Meter Point panel ground points and unit case ground.

  5. Check that there is continuity between the Remote Meter Point panel shaft voltage test point and the SCA rope holder mount.

  6. At the Remote Meter Point panel confirm that there is NO continuity between the shaft voltage test point and ground test point.

  7. Install ropes in the SCA.

  8. Confirm there is NO continuity between the rope "wear indicator" test point and ground test point.

Upon completion of the grounding wire installation, perform the necessary inspections as described in Test Point Inspections | Series 1.

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