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

CHAPTER 1: GETTING STARTED
1.4.6

S5 Thermal Model

1.4.7

S6 Current Elements

469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
GENERAL SWITCH A ALARM DELAY
GENERAL SWITCH A EVENTS
GENERAL SWITCH A TRIP
If the relay will not be used to trip the motor when someone gains unauthorized access to
the station, the next settings should be left at their default values:
GENERAL SWITCH A TRIP
: "Trip"
ASSIGN TRIP RELAYS
GENERAL SWITCH A TRIM DELAY
The S5 Thermal Model settings page contains settings 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
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 settings in the
S5 THERMAL MODEL OVERLOAD CURVE SETUP
STANDARD OVERLOAD CURVE NUMBER
The S6 Current Elements settings page contains settings 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 settings page as indicated.
When setting the relay for the first time, other settings not listed in this example should be
left disabled.
: "5.0 s"
: "On" so this event is registered.
: "Off"
: "Off"
: "5.0 s"
: "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"
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