Siemens ecofast 3RK1702-2GB18-0AA1, Руководство пользователя

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Device functions
ECOFAST Motor Starters
6-2
GWA 4NEB 950 5221-12 DS 02
6.1 Temperature sensor
Description
Temperature sensors are located directly in the stator winding of the motor. They are
used for direct monitoring of the temperature of the motor windings. This makes it
possible to detect whether the motor is operating normally or is overloaded.
Attention
ECOFAST motor starters can evaluate one temperature sensor circuit.
Two types of temperature sensor are supported:
• Thermoclick: this is a switch that opens when the winding reaches a certain tempera-
ture
• PTC type A: this is a positive temperature coefficient thermistor with a defined charac-
teristic in accordance with VDE 0660 Parts 302 and 303
"Temperature sensor" parameter
T his parameter enables you to determine which temperature sensor is to be used.
Setting range with parameter PO-0.1:
• Thermoclick [1]
• PTC type A [0]
Attention
When a Low Feature starter which is parameterized for Thermoclick temperature
sensors (3RK1323-2AS54-1AA only) is disconnected from the voltage supply (auxili-
ary power supply) for more than 10 hours, a group error (general warning) can occur.
This group error can be reset by disconnecting and then reconnecting the thermistor
circuit. This problem does not occur with Low Feature starters which are parameteri-
zed for PTC temperature sensors or with High Feature starters.
"Behavior in the event of overload - temperature sensor" parameter
This parameter enables you to determine how you want the motor starter to respond
in the event of overloading of the temperature sensor.
Setting range with parameter PO-0.2:
• Trip [1]
• Warn [0]
"Auto reset" parameter
Auto reset means that if a starting command is applied the motor starter will start
again automatically when the cause of the fault has been eliminated (auto reset).
Possible fault causes:
• Temperature sensor overload
• Temperature sensor wire break
• Temperature sensor short-circuit
Setting range with parameter PO-0.3:
• Auto reset [1]: NO
[0]: YES
Attention
The temperature sensor circuit is electrically connected to "24 V DC supply voltage
not switched".