Rockwell Automation Publication 193-UM015D-EN-P - February 2015 141
Protective Trip and Warning Functions Chapter 6
Phase Loss Trip Delay
Phase Loss Trip Delay (Parameter 240) allows you to define the time period for
which a phase loss condition must be present before a trip occurs. It is adjustable
from 0.1…25.0 seconds.
Table 172 - Phase Loss Trip Delay (Parameter 240)
Ground Fault Current Protection
In isolated or high impedance-grounded systems, core-balanced current sensors
are typically used to detect low-level ground faults caused by insulation
breakdowns or entry of foreign objects. Detection of such ground faults can be
used to interrupt the system to prevent further damage or to alert the appropriate
personnel to perform timely maintenance.
The E300 Electronic Overload Relay provides core-balanced ground fault
current detection capability, with the option of enabling Ground Fault Trip,
Ground Fault Warning, or both. The ground fault detection method and range
depends upon the catalog number of the E300 Sensing Module and Control
Module ordered.
Table 173 - Ground Fault Capabilities
➊ One of the following Catalog Number 193-CBCT_ Core Balance Ground Fault Sensors must be used:
Phase Loss Trip Delay (Parameter 240)
Default Value 1.0
Minimum Value 0.1
Maximum Value 25.0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 10
Units Seconds
Catalog Number Ground Fault Method
Ground Fault Trip/Warning
Range
193-ESM-IG-__-__
Internal 0.5…5.0 A
592-ESM-IG-__-__
193-ESM-VIG-__-__
592-ESM-VIG-__-__
193-EIOGP-22-___
External ➊ 0.02…5.0 A
193-EIOGP-42-___
1 — Ø 20 mm window
2 — Ø 40 mm window
3 — Ø 65 mm window
4 — Ø 85 mm window
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