ii BE1-951 Installation 9328900990 Rev L
Figure 12-29. Directional OC Protection with Reclosing of a Transmission Line (Zero-Sequence Current
Polarizing Source from Delta Tertiary Connected to IG) ................................................ 12-28
Figure 12-30. Directional OC Protection with Reclosing of a Transmission Line (Potential Polarized) 12-29
Figure 12-31. Directional OC Protection of a Small Generator (Potential Polarized) ........................... 12-30
Figure 12-32. Dual Voltage Source UF Load Shed Using Optional VTX Input; OC Bus Protection
(Including High Speed Bus Interlocking) ........................................................................12-31
Figure 12-33. 51V Generator, Leads, and Transformer Low Side, Backup Protection; Delta Ground Fault
Detection Using Externally Derived 3E0 Connected to VTX Input................................. 12-32
Figure 12-34. Directional Ground OC Protection Using External Source of Zero-Sequence Polarizing
Voltage (VTX) Compared to Ground Current (IG) Up the Neutral of a Delta-Wye Grounded
Transformer .................................................................................................................... 12-33
Figure 12-35. Directional Ground OC Protection Using External Source of Zero-Sequence Polarizing
Voltage (VX) Compared to Calculated Residual (3IO) (IN)............................................ 12-34
Figure 12-36. Personal Computer to BE1-951...................................................................................... 12-36
Figure 12-37. Modem to BE1-951 ......................................................................................................... 12-36
Figure 12-38. RFL9660 Protective Relay Switch to BE1-951 Cable..................................................... 12-36
Figure 12-39. SEL2020 to BE1-951 Relay............................................................................................ 12-36
Figure 12-40. RFL9600 Protective Relay Switch to BE1-951 Cable..................................................... 12-37
Figure 12-41. RS-485 DB-37 to BE1-951.............................................................................................. 12-37
Tables
Table 12-1. Contact Sensing Turn-On Voltage .......................................................................................12-1
Table 12-2. RS-232 Pinouts (COM 0 and COM 1)................................................................................ 12-35
Table 12-3. RS-485 Pinouts (COM 2) ................................................................................................... 12-37
Table 12-4. IRIG Terminal Assignments ............................................................................................... 12-38
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