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S4 CONTROLS
6–120
TRIGGER LOGIC
Range: OR, AND, NOR, NAND, XOR, XNOR
Default: OR
This setting defines the gate types for the trigger sources (inputs).
PKP TIME DELAY
Range: 0 to 60000 ms in steps of 1 ms
Default: 0 ms
This setting specifies the pickup time delay before Logic Element operation.
DPO TIME DELAY
Range: 0 to 60000 ms in steps of 1 ms
Default: 0 ms
This setting specifies the time delay from a reset timer that starts upon expiry of the
pickup time delay and prolongs the operation of the Logic Element until this time
expires.
OUTPUT RELAY X
For details see
Common
NUMBER OF BLOCKS
Range: 2 to 4
Default: 3
This setting defines the number of blocks to be used in the menu of the Logic Element.
Up to four blocks can be selected.
BLOCK 1 (4)
Range: Off, Any input from the list of inputs
Default: Off
Each of the blocks is configurable by allowing the assigning of an input selected from a
list of inputs. This input can be a contact input, a virtual input, a remote input, or an
output flag from a protection, or control element, as well as an input from any of the
other seven logic inputs. See the list of available inputs from the table below
BLOCK LOGIC
Range: OR, AND, NOR, NAND, XOR, XNOR
Default: OR
This setting defines the gate type for the block inputs.
A Logic Element can be used to provide under-voltage supervision when overcurrent
conditions are detected. The logic from the Logic Element below, see figure: Example of
Block Logic setting from EnerVista, shows that overcurrent trip will not be initiated unless
the relay detects either auxiliary or phase under-voltage conditions. In any other cases,
with both under-voltage elements dropped out, Overcurrent trip will not be initiated.
Each Logic Element can include output from another logic element.
Example: Programing an overall breaker alarm using Logic Elements
setpoints.
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
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