12.12 Thermal Model Setpoints; 12.13 Current Elements Setpoints - GE Multilin 469 Quick Reference Manual

QUICK REFERENCE GUIDE

12.12 Thermal Model Setpoints

12.13 Current Elements Setpoints

469 MOTOR MANAGEMENT RELAY – QUICK REFERENCE GUIDE
The S5 Thermal Model setpoints page contains setpoints for entering set-
tings 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
RTD BIAS CENTER POINT
: "155°C" – maximum value
RTD BIAS MAXIMUM
THERMAL CAPACITY ALARM
corrective actions and prevent the interruption of the process.
ASSIGN ALARM RELAYS
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 OVERLOAD CURVE SETUP
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
SHORT CIRCUIT TRIP
move to the next message.
: "Latched"
SHORT CIRCUIT TRIP
SHORT CIRCUIT TRIP OVEREACH FILETER
required
: "Trip"
ASSIGN TRIP RELAYS
SHORT CIRCUIT TRIP PICKUP
INTENTIONAL S/C TRIP DELAY
SHORT CIRCUIT TRIP BACKUP
the trip command, a second signal will be initiated via an auxiliary relay to generate a
: "6"
: "15 min."
: "30 min."
: "0.89"
: "130°C" – center value
: "Unlatched" – recommended for early warning to take
: "Alarm" – the Alarm contact could be use for local indication,
: "80%"
: "Yes" – captures event in the event report.
menu:
: "7"
key after each setpoint is entered to
MESSAGE
: "Off" - no filtering of DC component is
: "11.7"
: "0 ms" - Instantaneous trip is required.
: "On" - if the main disconnect device does not respond to
SYSTEM DATA
S6 CURRENT ELEMENTS
55