Overview
The “Motor starting time supervision” function protects motors against too long starting operations thus supplementing the “Thermal overload protection rotor” function. In particular, rotor-critical high-voltage motors can exceed their thermal limits quickly, when multiple starting attempts occur in a short period. If the durations of starting attempts are prolonged to a degree which can damage the motor, the function initiates an operate signal.
For more detailed information on “Motor starting time supervision” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Structure/Embedding of the Function
Setting Parameters
Setting parameters for Stage with Inverse-Time Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| Inverse-T 1 | ||||
| _:11551:1 | Inverse-T 1:Mode | off on test |
off | |
| _:11551:2 | Inverse-T 1:Operate & flt.rec. blocked | no yes |
no | |
| _:11551:101 | Inverse-T 1:Max. locked rotor time | 0.5 s to 180.0 s | 2.0 s | |
| _:11551:104 | Inverse-T 1:Start.cur./ mot.rated cur. | 1.00 I/IrObj to 20.00 I/IrObj | 4.90 I/IrObj | |
| _:11551:102 | Inverse-T 1:Max.start.time,cold motor | 1.0 s to 180.0 s | 10.0 s | |
| _:11551:103 | Inverse-T 1:Max.str.time, warm motor | 0.5 s to 180.0 s | 10.0 s | |
Setting parameters for Stage with User-Defined Characteristic Curve
| Addr. | Parameter | C | Setting Options | Default Setting |
| General | ||||
| _:1 | User curve #:Mode | off on test |
off | |
| _:2 | User curve #:Operate & flt.rec. blocked | no yes |
no | |
| _:101 | User curve #:Max. locked rotor time | 0.5 s to 180.0 s | 2.0 s | |
Logic Diagrams & highlights
Logic Diagram of Motor-Starting Time Supervision with Inverse-Time Characteristic Curve
Thermal Characteristic Curve with Starting Current
Example of Starting-Data Diagram
Example of Thermal-Limit Curve
Logic Diagram of Motor-Starting Time Supervision with User-Defined Characteristic Curve
Example of User-Defined Characteristic Curve
