GE GEH-6725 Mark VIe and Mark VIeS Controls Equipment
GE GEH-6725 Mark VIe and Mark VIeS Controls Equipment
INTRODUCTION
The GEH-6725 Mark VIe and Mark VIeS are a series of advanced control devices designed by General Electric (GE) for the monitoring and control of gas turbine, steam turbine and hydro turbine systems. These devices integrate advanced control technologies and safety protection features to ensure stable operation and efficient performance of the system under various operating conditions.
General Conditions of Safe Use
• Provision shall be made to limit power supply transient voltages to less than 140% of the peak rated power supply voltage.
• This equipment shall be used in an environment of not more than Pollution Degree 2 (as defined in EN 60664-1).
• For installation in North America, this equipment is suitable for use in Class I, Division 2, Groups A, B, C, and D, or Class I, Zone 2, Group IIC, or non-hazardous locations only.
• For Class I Division 2, A, B, C, and D classified locations, this open-type equipment shall be installed within an enclosure that is suitable for the environment, requires a tool or key to open, and meets the requirements of the applicable codes.
• For US/Canada Zone 2 classified locations, this equipment shall be installed within an enclosure UL/cUL certified for Zone 2, and for European Union Zone 2 classified locations, this equipment shall be installed within an ATEX Zone 2 certified enclosure. The enclosure should have a minimum ingress protection rating of at least IP54 (as defined in IEC 60529), only be accessible by use of a tool, and meet the requirements of applicable codes.
• All wiring shall be installed using suitable Class I Division 2 or Zone 2 wiring methods in accordance with the National Electrical Code (ANSI/NFPA 70), the Canadian Electrical Code, or other local codes as applicable, in accordance with the authority having jurisdiction. Refer to IEC 60079-25 Intrinsically safe electrical systems for guidance.
Power Distribution
• Power distribution boards shall be powered using the wire harnesses specified in Mark VIe and Mark VIeS Control Systems Equipment in Hazardous Locations (HazLoc) Instruction Guide (GEH-6725) and by a switched-mode power supply (SMPS) that is certified for the applicable location, has its output current limited to 20 A maximum for JPDS, JPDE, and 40 A for JPDG, and meets the specifications for Vendor Manufactured Control Power Supplies in the document Mark VIe and Mark VIeS Control Systems, Volume II (GEH-6721_Vol_II). When two UL listed power supplies are used for redundancy, the same make and model shall be used. A listed diode block accessory shall be used for reverse protection between power supplies where not provided by the source.
• For a customer-supplied contact wetting power source to an accessory terminal board through connector JF or JG, use an appropriate GE cable harness listed in Mark VIe and Mark VIeS Control Systems Equipment in Hazardous Locations (HazLoc) Instruction Guide (GEH-6725), the chapter Power Distribution Instructions, and provide separate listed over-current protection based on the ampacity of the individual conductors, but not more than 15 A per conductor.
• For North American locations, if contact wetting power is customer-supplied to the accessory terminal board through connector JE1 or JE2, the wire harness specified on drawing 336A4937FJ or in GEH-6725, the chapter Power Distribution Instructions, shall be used, and the wetting power source shall be current-limited by either a UL-recognized fuse rated at not more than 3 A, or one of the following power supplies: − UL R/C, Phoenix Contact© GmbH & Co Kg, model QUINT-PS-100-240AC/24DC/5GE, or QUINT-PS/1AC/24DC/5GE − UL R/C, Convertec Ltd.©, model TIS 150-124
• Power for Ethernet switches, controllers, and I/O modules shall be supplied through a power distribution board that limits the available current to 3.5 A maximum and is certified for the applicable classified location. Refer to GEH-6725, the chapter Power Distribution Instructions, for detailed information on power distribution boards.
• The Analog Processor, IS410BAPBH1A (comprised of IS400BAPBH1A and IS400BBAAH2A), and the IS210SAMBH1A terminal board should only be powered by the ISxxxJPDHG1A distribution board, which is a limited voltage limited current (LVLC) circuit, or similar.
Key Features
High Performance Control:
Mark VIe and Mark VIeS control devices use high-performance processors and advanced control algorithms, which can quickly respond to system changes and achieve precise control.
Complex control strategies and optimisation algorithms are supported to enhance overall system performance and efficiency.
Safety Protection Functions:
Built-in multiple safety protection functions, able to monitor the system's operating status in real time and automatically take protective measures when abnormalities are detected.
Supports redundant configuration and self-diagnosis of faults to improve system reliability and security.
Flexibility and expandability:
Provides rich I/O interface and communication protocol support, which is convenient for integration and expansion with other equipment and control systems.
Support modular design, according to the actual need for functional expansion and upgrading.
Easy maintenance and operation:
Provide intuitive operation interface and friendly user experience, easy for operators to carry out daily maintenance and monitoring.
Supports remote monitoring and diagnostic functions, reducing maintenance costs and improving maintenance efficiency.
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