9424200994 Rev U
Figure 77. Current-Polarized Directional Scheme for BE1-11g CT Connection
Logic Connections
Neutral current differential element logic connections are made on the BESTlogicPlus screen in
BESTCOMSPlus. The neutral current differential element logic block is illustrated in Figure 78. Logic
inputs and outputs are summarized in Table 46.
Name
Function
Block
Trip
Pickup
BE1-11g
Figure 78. Neutral Current Differential Element Logic Block
Table 46. Logic Inputs and Outputs
Input
Disables the 87N function when true
Output
True when the 87N element is in trip condition
Output
True when the 87N element is in pickup condition
Purpose
Neutral Current Differential (87N) Protection
129
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