Setpoint Entry Methods; Common Setpoints - GE 339 Instruction Manual

CHAPTER 6: SETPOINTS

Setpoint entry methods

Common setpoints

339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Before placing the relay into "IN SERVICE" mode, setpoints defining system characteristics,
inputs, relay outputs, and protection settings must be entered using one of the following
methods:
• Front panel, using the keypad and the display.
• Front USB port, or rear RS485, Ethernet 100 FX, Ethernet 10/100 BaseT (optional) port,
and a computer running the EnerVista 3 Series Setup software supplied with the relay.
• Rear serial RS485, and a SCADA system running user-written software.
Any of these methods can be used to enter the same information. A computer, however,
makes entry much easier. Files can be stored and downloaded for fast, error free entry
when a computer is used. To facilitate this process, the GE EnerVista CD with the EnerVista
3 Series Setup software is supplied with the relay.
The relay leaves the factory with setpoints programmed to default values, and these
values are shown throughout the setpoint message illustrations. Some of these factory
default values can be left unchanged whenever they satisfy the application.
At a minimum, the
S2 SYSTEM SETUP
correctly. To safeguard against the installation of a relay into which setpoints have not
been entered, the Relay Not Ready self-test warning is displayed. In addition, the critical
failure relay will be de-energized. Once the relay has been programmed for the intended
application, the
S1 RELAY SETUP/ INSTALLATION/ RELAY STATUS
from "Not Ready" (the default) to "Ready".
To make the application of this device as simple as possible, similar methods of operation
and similar types of setpoints are incorporated in various features. Rather than repeat
operation descriptions for this class of setpoint throughout the manual, a general
description is presented in this overview. Details that are specific to a particular feature are
included in the discussion of the feature. The form and nature of these setpoints is
described below.
• FUNCTION setpoint: The
operational characteristic of each feature. The range for these setpoints is two or
more of: "Disabled", "Enabled", "Trip", "Alarm", "Latched Alarm", and "Control".
If
<ELEMENT_NAME > FUNCTION
If <ELEMENT_NAME > FUNCTION
If
<ELEMENT_NAME > FUNCTION
output is generated, the feature declares a Trip condition, and operates the Trip relay
(output relay 1), any other selected auxiliary output relays, and displays the
appropriate trip message. The "ALARM" LED will not turn on.
If <ELEMENT_NAME> FUNCTION
generated, the feature declares an Alarm condition which operates any selected
auxiliary output relays and displays the appropriate alarm message. The ALARM LED
will flash upon operation. The Alarm condition will self-reset when the operating
condition clears, turning off the Alarm LED.
If
<ELEMENT_NAME> FUNCTION
output is generated, the feature declares an Alarm condition which operates any
selected auxiliary output relays and displays the appropriate alarm message. The
ALARM LED will flash upon operation. The Alarm condition and Alarm LED will stay
"ON" after the operating condition clears, until the reset command is initiated.
setpoints must be entered for the system to function
<ELEMENT_NAME> FUNCTION
: "Disabled", the feature is not operational.
: "Enabled", the feature is operational.
: "Trip", then the feature is operational. When an
: "Alarm", the feature is operational. When an output is
: "Latched Alarm", the feature is operational. When an
SETPOINTS MAIN MENU
setpoint should be changed
setpoint determines the
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