154 ES-50X Series Manual — P/N LS10129-000FL-E:E 5/23/2022
Appendix I: Open/Short/Ground Trip Values
Table I.1 lists the earth fault resistance detection for each applicable terminal on the FACP.
Table I.2 lists the open/short trip values and restoral values for the NAC circuits on the FACP.
Output Circuit Terminal Trip Resistance (in ohms)
Remote Sync + 360K
Remote Sync - 330K
NAC 1-2 + 360K
NAC 1-2 - 320K
ANN Bus A 270K
ANN Bus B 265K
Aux Power + 370K
Aux Power - 320K
SLC + 125K
SLC - 320K
Table I.1 Earth Fault Trip Values
Circuit Trip Resistance (in ohms) Restore Value
NAC 1-2 Shorts below 1.75K 2K
NAC 1-2 Opens above 25K 23K
Table I.2 NAC Open/Short Trip Values
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