AuCom MVE Series User Manual page 35

MOTOR PROTECTION
Hot start
•
If another start is attempted before the motor has cooled (excessive heating from previous starts and/or not enough
off time for cooling), the overload protection will trip.
Motor Thermal Model Protection Set-up
The motor information configured in the starter defines the motor thermal model protection curve. Accurate motor
data is critical for good operation of the thermal model. Configure the starter settings according to the motor
nameplate and datasheet:
Motor Full Load Current
• 1A
Locked Rotor Time
• 1B
Locked Rotor Current
• 1C
Motor Service Factor
• 1D
The motor data assumes the motor is starting from ambient temperature and defines the cold start thermal model
protection curve.
Motor thermal model protection curve: cold start
1 2
5
7
3
Motor Full Load Current
1 Parameter 1A
Motor Service Factor
2 Parameter 1D
3 Parameter 1B Locked Rotor Time
Locked Rotor Current
4 Parameter 1C
5 Motor thermal model protection curve (cold)
6 Motor failure curve
7 Typical motor operating current
8 Motor thermal capacity (from cold start)
9 Locked rotor time for hot start
10 Motor thermal model protection curve: hot start
11 Motor thermal capacity (from hot start)
34
| MVE User Manual (710-17074-00H)
6
4
8
Current
Motor thermal model protection curve: hot start
1 2
5
6
7
9
11
Current
10
4