GE VME-7807RC-414001 350-93007807-414001 Gas turbine card

General Wiring Requirements The circled ground symbol identifies the Protective Earth Terminal. This terminal must be connected directly to protective earth using a grounding conductor at least as large as those used on terminals 1 through 9. The insulation of the grounding conductor must be of green and yellow color. This symbol identifies functional or EMC earth. This terminal is to be used for cable shield connections only. It is not to be used as a protective earth terminal. When attaching a grounding connection, it is essential that the grounding ring lug or spade lug be connected between the flat washer and the CSA cup washer, and that the external tooth washer remain between the mounting base and the CSA cup washer. See Detail 'A' in Figure 1-2.

External wiring connections 

 shielding requirements for a typical installation are shown in the plant wiring diagram, Figure 1-3. These wiring connections and shielding requirements are explained in more detail in this chapter. To maintain compliance with CE marking requirements, the Low Voltage Directive requires that the Load Sharing Module must only be connected to Class III equipment. Wiring for the Load Sharing Module must be suitable for at least 90 °C (194 °F) and also be suitable for the maximum installed operating temperature. The Load Sharing Module must be permanently connected and employ fuses or circuit breakers in each of the PT lines to limit current to the LSM PT inputs to no more than 5 A. In addition, a 2 A fast-acting fuse or circuit breaker must be provided in the 24 Vdc power supply line.

All terminal block screws must be tightened

 to 0.56 to 0.79 N·m (5.0 to 7.0 lb-in). To maintain compliance with CE marking requirements, the EMC Directive requires that all shields be connected to the terminals provided per the plant wiring diagram, Figure 1-3. Wiring for the Load Sharing Module should not exceed 30 m (98 ft) in length. If any signal run must exceed this limit, an isolator must be used within 30 m of the Load Sharing Module. The isolator must provide galvanic isolation via optical or magnetic means.

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