EMC48S50-04 Teledyne Technologies Incorporated., EMC48S50-04 Datasheet - Page 3

• Manufacturer Part Number: EMC48S50-04
• Description: Three-phase Induction Motor Softstarter 200?480 Vac, 15kw Y , 26kw D
• Manufacturer: Teledyne Technologies Incorporated.

© 2003 TELEDYNE RELAYS
1. The device makes a complete diagnostic (mains, load and itself) since it has enough supply voltage (On the mains or on the control side).
2. The device only checks the presence of the phases and the closing of the solid-state switches during the voltage ramps (softstart and softstop)
3. The control overrides the diagnostic.
4. On a hard stop (no softstop) and in the case of driving a large motor, the device may temporarily display a problem concerning the mains. This
S
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and during the full on-state period.
is due to an important residual voltage across the motor windings (back EMF generated by the motor rotation and the remaining magnetic field).
This security allows the user to avoid connecting the motor to the mains in bad conditions. This phenomenon can be cancelled by using the
softstop feature that slowly reduces the remaining magnetic field inside the motor. This also avoids overvoltage across the solid-state switches
(increasing the lifetime expectancy of the integrated varistors). Therefore, softstop is recommended even with high inertia motor loads.
SETTINGS AND DIAGNOSTIC
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• If a problem occurs during the control period, the device will close all the solid-state switches. If the problem goes on during the full
• Likewise, if a problem occurs during the softstopping period, the device will stop immediately in order to reach the off-state diagnostic
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on-state period, the corresponding information will be given to the user according to the table above.
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IMPORTANT INFORMATION ABOUT THE DIAGNOSTIC
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[phone] • www.teledynerelays.com
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