Rockwell-automation 592- E300 Overload Relay User Manual Uživatelský manuál Strana 19

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Rockwell Automation Publication 193-UM015B-EN-P - June 2014 19
Product Overview Chapter 1
Overload Relay Expansion Bus (four Digital Expansion Modules, four Analog
Expansion Modules, and one Operator Station).
Protection Features
Standard Current-Based Protection
All versions of the E300
Electronic Overload Relay provide the following motor
protection functions:
Thermal Overload (51)
Phase Loss
Current Imbalance (46)
Undercurrent – load loss (37)
Overcurrent – load jam (48)
Overcurrent – load stall
Start Inhibit (66)
Ground Fault Current Based Protection
The E300 Electronic Overload Relay sensing modules and control modules with
a ground fault current option provides the following motor protection function:
Ground Fault – zero sequence method (50N)
Voltage and Power Based Protection
The E300 Electronic Overload Relay sensing modules with voltage sensing
provides the following motor protection functions:
Undervoltage (27)
Overvoltage (59)
Phase Reversal (47) – voltage based
Over and Under Frequency (81) voltage based
Voltage Imbalance (46)
Over and Under Power (37)
Over and Under Leading/Lagging Power Factor (55)
Over and Under Reactive Power Generated
Over and Under Reactive Power Consumed
Over and Under Apparent Power
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