GE 745 TRANSFORMER MANAGEMENT RELAY User Manual

5-80 745 Transformer Management Relay GE Power Management
5.7 S5 OUTPUTS 5 SETPOINTS
5
5.7 S5 OUTPUTS 5.7.1 DESCRIPTION
The
S5 OUTPUTS
page contains the settings to configure all outputs.
The 745 has nine digital outputs (one solid-state, four trip rated form A contacts, and four auxiliary form C con-
tacts) which are fully programmable using FlexLogic™ equations. FlexLogic™ is a highly flexible and easy-to-
use equation format which allows any combination of protection and monitoring elements, logic inputs, outputs,
and timers to be assigned to any output, using multiple input AND, OR, NAND, NOR, XOR, and NOT Boolean
logic gates. Each digital output can have an equation of up to 20 parameters. Five “virtual outputs” are also
available, each having an equation containing up to 10 parameters, whose output can be used as a parameter
in any other equation.
In addition to these outputs, the conditions to trigger a waveform capture (trace memory) is also programmable
using FlexLogic™. A 10 parameter equation is provided for this purpose.
5.7.2 INTRODUCTION TO FLEXLOGIC™
A FlexLogic™ equation defines the combination of inputs and logic gates to operate an output. Each output
has its own equation, an equation being a linear array of parameters. Evaluation of an equation results in either
a 1 (= ON, i.e. operate the output), or 0 (= OFF, i.e. do not operate the output).
The table below provides information about FlexLogic™ equations for all outputs in the 745:
yy SETPOINTS
yy S5 OUTPUTS
This message indicates the start of setpoints page
S5 OUTPUTS
. Press
to view the contents or to go on to the next page.
Table 5–5: FLEXLOGIC™ OUTPUT TYPES
NAME TYPE NUMBER OF EQUATION
PARAMETERS
EVALUATION
RATE
Output Relay 1 solid-state 20 every 1/2 cycle*
Output Relay 2
Output Relay 3
Output Relay 4
Output Relay 5
trip-rated
form A contacts
20 each every 1/2 cycle*
Output Relay 6
Output Relay 7
Output Relay 8
form C contacts 20 each every 100 ms
Self-Test Relay form C contacts
dedicated for self-test
(not programmable)
--- every 100 ms
Trace Trigger waveform capture trigger 10 every 1/2 cycle*
Virtual Output 1
Virtual Output 2
Virtual Output 3
Virtual Output 4
Virtual Output 5
internal register
(for use in other equations)
10 each every 1/2 cycle*
* cycle refers to the power system cycle as detected by the frequency circuitry of the 745.
MESSAGE
SETPOINT

GE 745 TRANSFORMER MANAGEMENT RELAY Specifications

General

Brand	GE
Model	745 TRANSFORMER MANAGEMENT RELAY
Category	Relays
Language	English