GEK-113032A W650 Wind Generator Protection System 3-53 HARDWARE 3.3 MECHANICAL DESCRIPTION3Figure 3–5: DIMENSIONS OF THE 19” RACKS 6U HIGH FOR TWO RELAYS3.3.2 REAR DESCRIPTIONThe relay is wired through the terminal blocks located at the rear of the unit. The magnetic module, which receives the CTsecondary currents and the metering voltages, incorporates a very robust terminal board (columns A and B). Current inputsprovide automatic shorting of external CT circuits. The maximum recommended cable section for this terminal board, withthe appropriate terminal, is 6 mm 2 (AWG 10).The rest of the terminal blocks, F and G for I/O and H for power supply, incorporate high quality connectors with thecapacity to withstand a rated current of 15 A at 300 V. These terminal blocks admit a cable section of up to 2.54 mm 2 (AWG12).The communication boards have a different type of connector depending on the selected media: RS485, glass or plasticfiber optic.WARNINGModule withdrawal and insertion may only be performed when control power has been removed from the unit.Proper electrostatic discharge protection (i.e. a static wrap) must be used when coming in contact withproducts while the relay is energized.
