Functions
5.8 Motor and inverter protection
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.
119
Temperature measurement using a temperature sensor (PTC or KTY 84 sensor)
Parameter Description
P0003 = 2 User access level
2: Advanced
P0335 = 0 Specify the motor cooling
0: Self-cooling with shaft-mounted fan attached to the motor (factory setting)
1: Separate cooling by means of a separately-driven cooling fan
2: Self-cooling and internal fan
3: Separate cooling and internal fan
P0601 = 0
Specify the motor temperature sensor
0: No encoder (factory setting; → P0610)
1: PTC thermistor (→ P0604)
2: KTY84 (→ P0604)
P0604 = … Motor overtemperature alarm threshold (0°C … 220°C, factory setting 130°C)
Enter the alarm threshold for motor overtemperature protection. The shutdown
temperature threshold (alarm threshold + 10 %) is the value at which either the
converter is shut down or I
max
is reduced (P0610).
P0610 = 2 Response for motor overtemperature I
2
t
Defines the behavior as soon as the motor temperature reaches the alarm threshold.
0: No response, alarm only
1: Alarm and reduction of I
max
(reduces the output frequency)
2: Fault and shutdown (F0011) (factory setting)
P0640 Motor overload factor (entered in % referred to P0305: rated motor current)
Temperature measurement without temperature sensor
This temperature calculation is only possible in the vector control mode (P1300 =
20/21/22/23) and functions by calculating a thermal motor model.
Parameter Description
P0621 = 1 Motor temperature measurement after restarting
0: No identification (factory setting)
1: Temperature measurement after the first "motor ON"
2: Temperature measurement after each "motor ON".
P0622 = … Magnetization time of the motor for temperature measurement after starting
(set
automatically as the result of motor data identification)
P0625 = 20 Ambient motor temperature
Enter the ambient motor temperature in°C at the instant that the motor data is
acquired (factory setting: 20°C).
The difference between the motor temperature and motor environment (P0625) must
lie within a tolerance range of approx. ± 5 °C.
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