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1.4.10 Other Settings
1–36
: "100 Ohm Platinum"
STATOR RTD TYPE
: "100 Ohm Platinum"
BEARING RTD TYPE
: "100 Ohm Platinum"
AMBIENT RTD TYPE
: "100 Ohm Platinum" – default value
OTHER RTD TYPE
As per the information provided above, there will be six RTDs, two per phase located in the
Stator, and two Bearing RTDs, one to monitor the ambient temperature.
For Stator Overtemperature protection, enter the following settings in the
to
TEMPERTURE
RTD 1
: "Stator"
RTD #1 APPLICATION
: "ST Ph A1"
RTD #1 NAME
: "Unlatched"
RTD #1 ALARM
ASSIGN ALARM RELAYS
RTD #1 ALARM TEMPERATURE
: "Off"
RTD #1 HIGH ALARM
: "Alarm" - default value
HIGH ALARM RELAYS
RTD #1 HIGH ALARM TEMPERATURE
RTD #1 ALARM EVENTS
: "Latched"
RTD #1 TRIP
: "RTD #5"
RTD #1 TRIP VOTING
: "Trip"
ASSIGN TRIP RELAYS
RTD #1 TRIP TEMPERATURE
The settings for the other RTDs are entered in similar fashion. Refer to S8 RTD Temperature
on page 5–70 for additional settings and additional information on RTD monitoring.
Undervoltage Protection
In addition to the settings illustrated above, there will be cases in motor applications where
additional settings will be required, to monitor other system parameters such as voltage
levels.
The following sub-section will illustrate the procedures to set the 469 Motor Management
Relay to meet those requirements.
Description
Using the same system information, the following example illustrates the steps to set the
469 for Undervoltage protection.
The following settings are provided:
Pickup: 70% of nominal voltage – starting
80% of nominal voltage – running
Time Delay: 13.0 s
Other Considerations
•
The function will be active only if there is voltage in the line feeding the motor, to avoid
nuisance trips due to the lack of voltage. The 469 will consider the bus energized only
menus:
RTD6
: "Alarm"
: "135°C"
: "135°C" - default value
: "On"
: "155°C"
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 1: GETTING STARTED
S8 RTD
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