Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
List of Figures
Figure 1.1 Functional Overview .............................................................................................................. 1.2
Figure 1.2 Transformer and Overcurrent Protection................................................................................ 1.4
Figure 1.3 Transformer and Low-Voltage Bus Protection....................................................................... 1.5
Figure 1.4 Bus and Feeder Protection...................................................................................................... 1.5
Figure 1.5 Unit Differential Protection.................................................................................................... 1.6
Figure 2.1 Relay Dimensions for Rack-Mount and Panel-Mount Models.............................................. 2.2
Figure 2.2 Front-Panel Drawings–Models 0387x0xxxH and 0387x1xxxH ............................................ 2.3
Figure 2.3 Front-Panel Drawings–Models 0387x0xxx3 and 0387x1xxx3.............................................. 2.4
Figure 2.4 Rear-Panel Drawings–Models 0387x0xxxxX and 0387x1xxxx2 .......................................... 2.6
Figure 2.5 Rear-Panel Drawings–Models 0387x1xxxx4 and 0387x1xxxx6........................................... 2.7
Figure 2.6 Rear-Panel Drawings–Models 0387xYxxxx6 and 0387xYxxxx2 ......................................... 2.8
Figure 2.7 Standard Independent Output Contact Representation ........................................................ 2.10
Figure 2.8 Example AC Connections (Three-Winding Transformer) ................................................... 2.12
Figure 2.9 Example DC Connections (Basic Version) .......................................................................... 2.13
Figure 2.10 Main Board Jumpers, Connections, and Battery Locations ................................................. 2.18
Figure 2.11 Interface Board 2 Component Layout (Conventional Terminal Block)............................... 2.19
Figure 2.12 Interface Board 4 Component Layout (Conventional Terminal Block)............................... 2.20
Figure 2.13 Interface Board 6 Component Layout (Conventional Terminal Block)............................... 2.21
Figure 2.14 Interface Board 2 Component Layout (Connectorized)....................................................... 2.22
Figure 2.15 Interface Board 6 Component Layout (Connectorized)....................................................... 2.23
Figure 3.1 Percentage Restraint Differential Characteristic .................................................................... 3.2
Figure 3.2 Winding 1 Compensated Currents .........................................................................................3.3
Figure 3.3 Differential Element (87-1) Quantities (SEL-387-0) ............................................................. 3.3
Figure 3.4 Differential Element (87-1) Quantities (All But SEL-387-0) ................................................ 3.4
Figure 3.5 Differential Element Decision Logic ..................................................................................... 3.5
Figure 3.6 Differential Element Harmonic Blocking Logic.................................................................... 3.7
Figure 3.7 Differential Element (87BL1) Blocking Logic (SEL-387-0)................................................. 3.8
Figure 3.8 Differential Element (87BL1) Blocking Logic (All But SEL-387-0).................................... 3.8
Figure 3.9 DC Blocking (DCBL1) Logic (All But SEL-387-0).............................................................. 3.9
Figure 3.10 Primary Currents and Secondary Currents as Measured by the Relay ................................ 3.21
Figure 3.11 REF Enable/Block Logic ..................................................................................................... 3.26
Figure 3.12 REF Directional Element ..................................................................................................... 3.26
Figure 3.13 REF Protection Output (Extremely Inverse-Time O/C)....................................................... 3.27
Figure 3.14 REF Function, 32IOP Setting Guide.................................................................................... 3.29
Figure 3.15 Thermal Element Logic........................................................................................................ 3.33
Figure 3.16 Top-Oil and Hot-Spot Temperatures .................................................................................... 3.34
Figure 3.17 Example System Block Diagram ......................................................................................... 3.48
Figure 3.18 50Pn1 Phase Definite-Time O/C Element, Torque Controlled ............................................ 3.50
Figure 3.19 50Pn2 Phase Instantaneous O/C Element, Torque Controlled............................................. 3.50
Figure 3.20 50Pn3 and 50Pn4 Phase Instantaneous O/C Element, Nontorque Controlled ..................... 3.50
Figure 3.21 51Pn Phase Inverse-Time O/C Element, Torque Controlled................................................ 3.51
Figure 3.22 50Qn1 and 50Nn1 Sequence Definite-Time O/C Element, Torque Controlled................... 3.52
Figure 3.23 50Qn2 and 50Nn2 Sequence Instantaneous O/C Element, Torque Controlled.................... 3.52
Figure 3.24 51Qn and 51Nn Sequence Inverse-Time O/C Element, Torque Controlled ........................ 3.53
Figure 3.25 Combined Overcurrent Example..........................................................................................3.54
Figure 3.26 51PC1 and 51NC1 Combined Inverse-Time O/C Elements ................................................ 3.55
Figure 3.27 51PC2 and 51NC2 Combined Inverse-Time O/C Elements ................................................ 3.59
Figure 3.28 U. S. Moderately Inverse Curve: U1 ....................................................................................3.67
Figure 3.29 U.S. Inverse Curve: U2 ........................................................................................................ 3.68
Figure 3.30 U.S. Very Inverse Curve: U3................................................................................................ 3.69
Figure 3.31 U.S. Extremely Inverse Curve: U4....................................................................................... 3.70
Figure 3.32 U.S. Short-Time Inverse Curve: U5 .....................................................................................3.71
Figure 3.33 IEC Class A Curve (Standard Inverse): C1.......................................................................... 3.72
Figure 3.34 IEC Class B Curve (Very Inverse): C2................................................................................. 3.73
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