About Motor Start and Run States
Based on the electrical consumption of the driven motor, TeSys island identifies whether the motor is in the Off, Start, or Run state. These states, along with the enable setting, determine which protection functions apply. For instance, the Undercurrent protection function does not apply to a motor in the Off state.
The motor states are defined by the following:
-
Off state: the measured current is less than or equal to 30% Ir.
-
Start state: this state begins after the Off state, with the detection of a measured current greater than 30% Ir. It continues until a transition occurs to Run state (or Off).
-
Run State (condition 1): The Long Start Trip protection function is disabled. The detected current stays between 30% Ir and the Long Start Trip Level for the time defined by the Long Start Trip Delay. (The timer starts at the beginning of the Start state.)
-
Run State (condition 2): The Long Start Trip protection function is disabled. The detected current rises above the Long Start Trip Level, and does not fall below the Long Start Trip Level within the time defined by Long Start Trip Delay. (The timer starts at the beginning of the Start state.)
-
Run State (condition 3): The detected current rises above Long Start Trip Level and then falls below the Long Start Trip Level.
Run State
The following figures illustrate the different transitions from the Start State to Run State.
Run State (Condition 1)
|
I |
Current |
Ir |
Rated Current |
|
A |
Long Start Trip Level |
B |
Long Start Trip Delay |
|
C |
Start State |
D |
Run State |
|
t |
Time |
Run State (Condition 2)
|
I |
Current |
Ir |
Rated Current |
|
A |
Long Start Trip Level |
B |
Long Start Trip Delay |
|
C |
Start State |
D |
Run State |
|
t |
Time |
Run State (Condition 3)
|
I |
Current |
Ir |
Rated Current |
|
A |
Long Start Trip Level |
C |
Start State |
|
D |
Run State |
t |
Time |