GE 745 Instruction Manual page 196

S5 OUTPUTS
5.7.4 FlexLogic™ Rules
5–100
Name
Output relay 1 solid-state
Output relays 2 to 5 trip-rated form-A contacts
Output relays 6 to 8 form-C contacts
Self-test relay form-C contacts dedicated for
self-test (not programmable)
Trace trigger waveform capture trigger
Virtual outputs internal register (for use in
other equations)
* refers to the power system cycle as detected by the frequency circuitry of the 745.
As mentioned above, the parameters of an equation can contain either INPUTS or GATES.
Inputs
Element* pickup
Element* operate
Logic inputs 1 to 16
Virtual inputs 1 to 16
Output relays 1 to 8
Virtual outputs 1 to 5
Timers 1 to 10
* refers to any protection or monitoring element in page
Gates Number of inputs
NOT 1
OR 2 to 19 (for 20 equation parameters)
2 to 9 (for 10 equation parameters)
AND 2 to 19 (for 20 equation parameters)
2 to 9 (for 10 equation parameters)
NOR 2 to 19 (for 20 equation parameters)
2 to 9 (for 10 equation parameters)
NAND 2 to 19 (for 20 equation parameters)
2 to 9 (for 10 equation parameters)
XOR 2 to 19 (for 20 equation parameters)
2 to 9 (for 10 equation parameters)
Inputs and gates are combined into a FlexLogic™ equation. The sequence of entries in the
linear array of parameters follows the general rules listed in the following section.
The general FlexLogic™ rules are listed below.
1. Inputs to a gate always precede the gate in the equation.
Table 5–10: FlexLogic™ output types
Type
Table 5–11: FlexLogic™ input types
Input is "1" (= ON) if...
The pickup setting of the element is exceeded
The pickup setting of the element is exceeded for the programmed
time delay
The logic input contact is asserted
The virtual input is asserted
The output relay operates
(i.e. evaluation of the FlexLogic™ equation results in a '1')
The virtual output operates
(i.e. evaluation of the FlexLogic™ equation results in a '1')
The timer runs to completion
(i.e. the 'start' condition is met for the programmed time delay)
S4 ELEMENTS
Table 5–12: FlexLogic™ gates
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
Equation Evaluation rate
parameters
20 every 1/2 cycle*
20 each every 1/2 cycle*
20 each every 100 ms
--- every 100 ms
10 every 1/2 cycle*
10 each every 1/2 cycle*
.
Output is "1" (= ON) if...
input is '0'
any input is '1'
all inputs are '1'
all inputs are '0'
any input is '0'
odd number of inputs are '1'