CHAPTER 3: HARDWARE
3.3 MECHANICAL DESCRIPTION
GEK-106310-AF
F650 DIGITAL BAY CONTROLLER
3-7
3.3.2 Rear description
The relay is wired through the terminal blocks located at the rear of the unit.
The magnetic module, which receives the CT secondary currents and the metering voltages, incorporates a very robust
terminal board (columns A and B) The maximum tightening torque for the screws on terminal boards A and B is 1.2 Nm.
Current inputs provide automatic shorting of external CT circuits. The maximum recommended cable section for this
terminal board, with the appropriate terminal, is 6 mm
2
(AWG 10).
The use of twisted pair wire and/or shielded is recommended for the CT secondary current Isg.
The rest of the terminal blocks, incorporate high quality connectors with the capacity 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
(AWG 12).
The relay should be connected directly to the ground bus, using the shortest practical path. A tinned copper, braided,
shielding and bonding cable should be used. As a minimum, 96 strands of number 34 AWG should be used.
The communication boards have different types of connector depending on the selected media: RS485, glass or plastic
fiber optic.
Figure 3-5: Connector locations
WARNING
Module 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 with products while the relay is energized.
Summary of Contents for F650
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