Basler Electric DGC-2020HD - Manual (Page 148)

138 9469300990 Rev B
Inhibit Voltage
Inhibit Voltage settings impede frequency rate-of-change element operation during undervoltage
conditions that may occur during system startup.
Logic Connections
Frequency element logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus. The
frequency element logic block is illustrated in Figure 75. When the Block input is true, the 81 element is
disabled. The Trip output is true when the 81 element is in a trip condition.
Figure 75. Frequency Element Logic Block
Operational Settings
Frequency element operational settings are configured on the Frequency settings screen (Figure 76) in
BESTCOMSPlus. Setting ranges are defined in the Specifications chapter.
Figure 76. Settings Explorer, Generator Protection, Frequency
Overcurrent (51)
Six overcurrent protection (51) elements monitor the current applied to the DGC-2020HD. An element can
be configured to protect against overcurrent by monitoring a single- or three-phase system, neutral
current, positive-sequence current, negative-sequence current, or ground current. This element is
available only in styles xxExxxxxx of the DGC-2020HD.
Generator Protection DGC-2020HD