Demand Current Logic Output Application-Raise Pickup For Unbalance; Current - Schweitzer Engineering Laboratories SEL-351R Instruction Manual

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Demand Current Logic Output Application—Raise Pickup for Unbalance Current

During times of high loading, the residual ground overcurrent elements can see relatively high

unbalance current I

GDEM to detect the residual ground (unbalance) demand current I

pickup of the residual ground time-overcurrent element 51G1T. This is accomplished with the

following settings from Table 8.5, pertinent residual ground overcurrent element settings, and

control equation torque control setting 51G1TC:

Refer to Figure 8.11, Figure 8.12, and Figure 3.19.

Figure 8.12: Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance

). To avoid tripping on unbalance current I

!GDEM + GDEM * 50G5

Breaker/Recloser Monitor, Battery System Monitor,

Metering, and Load Profile Functions

SEL-351R Instruction Manual

, use Relay Word bit

and effectively raise the

Date Code 20020215

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