Inputs Configuration; Outputs Configuration - GE Multilin DFF Instruction Manual

4.1 INPUTS CONFIGURATION

Each of the 14 or 7 configurable Inputs (depending on the model) can have any of the following options:
•
Input non-active
•
External Trigger ( Pulse )
•
Table 0 selection ( Level )
•
Table 1 selection ( Level )
•
Frequency trips block ( Level )
•
Voltage trips block ( Level )
•
Complete protection trips block ( Level )
Description:
• Non active: Generic meaning, to be used in user application.
• External Trigger (Pulse): This input is activated by a pulse and triggers the oscillography unit to capture the
analog waveforms at that moment.
• Table 0 selection 0 (Level): This input is active while there is Vdc applied to the input. It is used to change the
active setting table. Please refer to section 2.5 for further details.
• Table 1 selection (Level): Same as above.
• Frequency trips block (Level): This input is active while there is Vdc applied to the input. It is used to block the
operation of all frequency units.
• Voltage trips block (Level): This input is active while there is Vdc applied to the input. It is used to block the
operation of all voltage units.
• Complete protection trip block (Level): This input is active while there is Vdc applied to the input. It is used to
block the operation of all protection units.

4.2 OUTPUTS CONFIGURATION

The DFF protection system provides 28, 20 or 8 user configurable outputs (depending on the model) plus five non-
programmable factory configured ones. These outputs are referred as SP1, SP2, etc.
Any of the internal states of the DFF (shown in table I) can be configured to close one of these programmable
outputs. The operation of the output can be associated either to the activation or deactivation of those internal states.
Following the same rules described in previous sections, logic circuits can be done with the outputs, using OR, AND
and NOT gates.
To configure protection output number 14 as the logic AND of digital input number 1 and the undervoltage trip these
steps should be followed:
• Configure input number 1 as non-active.
• Configure AND number 1 output as the activation of input number 1.
• In the same screen configure AND number 2 output as the trip of the undervoltage unit.
• In the same screen configure AND number 3 as the logic AND of AND number 1 and number 2 gates.
• In the output configuration screen, assign output number 14 as the activation of AND number 3.
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EQUIPMENT CONFIGURATION
DFF Digital Feeder Relay GEK-106166E