User Manual Manual

vi Table of Contents
Publication 825-UM001B-EN-P January 2001
Figure3.9Trip Characteristics (40…100 s) . . . . . . . . . . . . . . . . . . 3-20
Figure 3.10 Reduction in Permissible Motor Output
Due to Voltage Asymmetry per IEC and NEMA . . . . 3-23
Figure3.11Function of High Overload and Jam Protection . . . . . 3-24
Figure3.12Function of Underload Protection . . . . . . . . . . . . . . . . 3-26
Figure3.133-Phase Current Detection . . . . . . . . . . . . . . . . . . . . . . 3-27
Figure3.14Example of 2-Phase Current Sensing . . . . . . . . . . . . . . 3-28
Figure 3.15 Isolated Network: Earth Fault
on the Network Side . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31
Figure 3.16 Network Earthed through a High Impedance
Earth Fault on the Network Side . . . . . . . . . . . . . . . . . 3-31
Figure 3.17 Isolated network: Earth (Ground) Fault on the Leads
on the Motor Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Figure 3.18 Network Earthed through a High Impedance:
Earth (Ground) Fault on the Motor Leads. . . . . . . . . . 3-32
Figure 3.19 Isolated Network: Earth (Ground) Fault
in the Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Figure 3.20 Network Earthed through a High Impedance:
Earth (Ground) Fault on the Motor. . . . . . . . . . . . . . . 3-32
Figure3.21Limiting the Number of Starts per Hour . . . . . . . . . . . 3-33
Figure3.22Monitoring Starting Time . . . . . . . . . . . . . . . . . . . . . . . 3-34
Figure 3.23 Current and Temperature Curves for Warm and
Cold Motor Starts and the Smart Motor Manager
Tripping Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36
Figure 3.24 Example for t6x
e
= 10 s and
Warm Trip Time= 70% . . . . . . . . . . . . . . . . . . . . . . . . 3-37
Figure3.25Interruption of a Short-Circuit . . . . . . . . . . . . . . . . . . . 3-43
Figure3.26Stalling During Starting . . . . . . . . . . . . . . . . . . . . . . . . . 3-45
Figure3.27Characteristic of PTC Sensors as per IEC 34-11-2 . . . 3-48
Figure3.28Analog Output for Motor Temperature Rise. . . . . . . . 3-49
Figure3.29Analog Output for Motor Temperature. . . . . . . . . . . . 3-50
Figure3.30Analog Output for Motor Current . . . . . . . . . . . . . . . . 3-50
Figure3.31Operating Diagram for Timer Functions . . . . . . . . . . . 3-52
Figure3.32Diagram of Star-Delta (Wye-Delta) Starting. . . . . . . . . 3-55
Figure 4.1Basic Unit Mounted in an Enclosure . . . . . . . . . . . . . . . 4-1
Figure 4.2Mounting Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Figure 4.3 Basic Unit Mounted into Panel Mounting Frame
(Cat. No. 825-FPM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2