Rockwell Automation 193-EC4 EC4 Current Monitoring Relay User Manual - Manual (Page 83)

84 Rockwell Automation Publication 193-UM011A-EN-P - September 2010
Chapter 6 Current Monitoring Parameters
Ground Fault Current
Reporting Current Range
The following chart illustrates the minimum and maximum reporting ground
fault current values for a given ground fault current range.
➊ The EC4 Current Monitoring Relay will report 0 A if the ground fault current is below 50% of the minimum
ground fault current setting for a given range.
➋ The EC4 Current Monitoring Relay is capable of reporting values greater than the maximum values shown, but
the accuracy of the value is compromised.
➌ The accuracy specified is only applicable to non-distorted sinusoidal currents.
➍ 20…100 mA for resistive loads only. For motor loads consult your local Allen-Bradley distributor .
Frequency Range
The EC4 Current Monitoring Relay is capable of sensing variable frequency
ground fault currents ranging from 20…250 Hz.
Exception: Any EC4 Current Monitoring Relay using an external ground fault
sensor is limited to 50/60 Hz detection.
Monitor Group
Table 22 - Ground Fault Current Reporting Summary
Ground Fault
Current Range Minimum
Reporting
Current ➊➌ Maximum
Reporting
Current ➋➌ E3 Plus Cat. No. /Series
20…100 mA➍ 10 mA 180 mA 193/592-EC3 — Series C and later
100…500 mA 50 mA 900 mA 193/592-EC3 — Series C and later
200 mA…1.0 A 100 mA 1.80 A 193/592-EC3 — Series C and later
1.0…5.0 A 500 mA 9.00 A 193/592-EC2 — Series A and later
L1 CURRENT
This parameter provides the L1 phase current
measurement in amperes.
Parameter Number 1
Access Rule Get
Data Type INT
Object Mapping 2C
hex
-1-231
2C
hex
-1-8
2C
hex
-1-227
Group Monitor
Units Amps
Minimum Value See Table 20 -
Maximum Value See Table 20 -
Default Value None