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Related Products: |
EAMA-001, EAMA-002, EAMA-003, EAMA-004, EAMA-201, EGSA-310, EGSA-320, EXMC-001, EXMC-002 |
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Related Documents: |
EZDP-2089 |
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Type: |
Installation |
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Keywords/Labels: |
installing, mounting, cable connections, rotor flux |
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Summary: |
This document describes the installation of the Generator Field Monitoring System. |
This section describes the installation of the Generator Field Monitoring System. Before beginning the installation, thoroughly review the Generator Field Monitoring System Installation Planning Guide (EZDP-2090).
This section covers the placement and mounting requirements for the Generator Field Monitoring System enclosure.
The Generator Field Monitoring System (A) is designed to be mounted using a strut channel rack (B). The enclosure should be mounted at the drive end of the generator and as close to the Shaft Grounding Assembly as possible to minimize the run length of the signal cables, while:
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Maintaining operator safety
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Meeting the requirements outlined in the Installation Planning Guide (EZDP-2090), to minimize the run length of the signal cables
This section covers the placement and mounting requirements for the Power Supply Enclosure.
The Power Supply Enclosure (A) is designed to be mounted using a strut channel rack (B). If desired, the Power Supply Enclosure can be mounted to the same strut channel rack as the Generator Field Monitoring System. Cabling traveling between the monitoring system enclosure and the Power Supply Enclosure must not exceed 25 feet in length.
This section covers the requirements relating to the routing and termination of the Shaft Grounding Assembly (SGA) and Shaft Contact Assembly (SCA) signal cables.
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Connect the supplied Ethernet signal cables (D) to the SGA Junction Box (B) attached to the SGA cable whip (A).
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[Only if Shaft Contact Assembly is installed] Connect the supplied Ethernet signal cable to the SCA Junction Box (not shown) in the same manner as the SGA.
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Connect the other end of the Ethernet signal cables (D) to the Generator Field Monitoring System according to the associated wiring diagram(s).
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Drill and tap a 5/16”-18 hole in the unit case near the Shaft Grounding Assembly junction box (B) for the ground wire connection. Route the 8 AWG ground wire (C) from the junction box (B) to unit case ground. Verify that the ground wire termination point will maintain proper electrical connection; remove any paint, rust, or other, contaminants from the location of the 5/16”-18 hole.
This section covers the requirements relating to the routing and termination of the rotor flux signal cable (A).
The location of the rotor flux probe may vary from generator to generator. Cutsforth will rely on the plant to locate the rotor flux probe and/or its signal pick-up point. It is recommended that the total length of the rotor flux signal cables (A), from the rotor flux probe to the Generator Field Monitoring System, be kept at or below 100 ft.
For the rotor flux signal cable (A), Cutsforth recommends an 18 AWG shielded, twisted pair cable with a drain wire. The procurement of this cable and its connectors to fit the flux probe are the responsibility of the plant’s electrical contractor.
This section covers the requirements relating to the routing and termination of the DC power cabling from the Power Supply Enclosure to the Generator Field Monitoring System.
The Power Supply Enclosure has an internal enclosed AC/DC converter which has an output of 24V, 5A DC (120W). The output of this power supply should be wired to the input of the Generator Field Monitoring System using the Cutsforth-supplied 16 AWG, shielded, twisted-pair cable (A). The cabling should be run to the monitoring system enclosure in liquid-tight conduit.
This section covers the power requirements for the Power Supply Enclosure and the data connections for the Generator Field Monitoring System.
The Power Supply Enclosure has an internal enclosed AC/DC converter which requires a power input of 85-264 V and 5 A AC at 50 or 60 Hz. The power input cabling (A) should be run to the Power Supply Enclosure in liquid-tight conduit.
Cutsforth recommends a CAT6a cable for the data output from the Generator Field Monitoring System to the control room (B). The data output cabling should be run to the control room in liquid-tight conduit.
Where flexible conduit is used, Cutsforth recommends the use of type HCX high-temp flexible metallic conduit (LFMC).