S5 Thermal Model; S6 Current Elements - GE 469 Instruction Manual

Application Example

S5 Thermal Model

S6 Current Elements

GE Multilin
To identify the digital input:
: "General Sw. A"
INPUT 1 FUNCTION
: "Stn. Monitor"
SWITCH NAME
To define the asserted logic:
: "Normally Open"
GENERAL SWITCH A
To define the functionality:
BLOCK INPUT FROM START
GENERAL SWITCH A ALARM
: "Alarm"
ASSIGN ALARM RELAYS
GENERAL SWITCH A ALARM DELAY
GENERAL SWITCH A EVENTS
: "Off"
GENERAL SWITCH A TRIP
If the relay will not be used to trip the motor when someone gain unauthorized
access to the station, the next setpoints shall be left with their default values:
: "Off"
GENERAL SWITCH A TRIP
: "Trip"
ASSIGN TRIP RELAYS
GENERAL SWITCH A TRIM DELAY
The S5 Thermal Model setpoints page contains setpoints for entering settings
related to protection of the motor during the starting process as well as during
normal operation.
As per the information provided above, the settings for the Thermal Model are
entered as follows in the
: "Standard"
SELECT CURVE STYLE
: "1.25 x FLA"
OVERLOAD PICKUP
: "Trip"
ASSIGN TRIP RELAYS
UNBALANCE BIAS K FACTOR
COOL TIME CONSTANT RUNNING
COOL TIME CONSTANT STOPPED
HOT/COLD SAFE STALL RATIO
: "Yes"
ENABLE RTD BIASING
: "40°C" – ambient temperature
RTD BIAS MINIMUM
: "130°C" – center value
RTD BIAS CENTER POINT
: "155°C" – maximum value
RTD BIAS MAXIMUM
THERMAL CAPACITY ALARM
corrective actions and prevent the interruption of the process.
: "Alarm" – the Alarm contact could be use for local
ASSIGN ALARM RELAYS
indication, or to send a local signal to reduce load, before a trip is issued.
THERMAL CAP. ALARM LEVEL
THERMAL CAPACITY ALARM EVENT
As well, select the overload curve for the Thermal model with the following setpoint
in the
S5 THERMAL MODEL
STANDARD OVERLOAD CURVE NUMBER
The S6 Current Elements setpoints page contains setpoints for entering protection
element characteristics. In our example, these characteristics are specified under
Motor Protection heading.
From this data and the resulting calculations, program the S6 setpoints page as
indicated. When setting the relay for the first time, other setpoints not listed in this
example should be left disabled.
For the Short Circuit element, enter the following values in the
page. Press the MESSAGE
SHORT CIRCUIT TRIP
move to the next message.
http://www.GEindustrial.com/multilin
: "0 s"
: "Latched"
: "5.0 s"
: "On" so this event is registered.
: "5.0 s"
: "6"
: "15 min."
: "30 min."
: "0.89"
: "Unlatched" – recommended for early warning to take
: "80%"
: "Yes" – captures event in the event report.
menu:
OVERLOAD CURVE SETUP
: "7"
key after each setpoint is entered to
469
Motor Management Relay
S6 CURRENT ELEMENTS
1–25