Related Manuals for Schweitzer Engineering Laboratories SEL-151C
Summary of Contents for Schweitzer Engineering Laboratories SEL-151C
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Page 5: Sel-151C Instruction Manual Addendum
ETTINGS NCLUDED IN THE ELAY The SEL-151C relay has no reclosing relay. Thus, it does not have the following SEL-151 relay settings: 79OI1, 79OI2, 79OI3, 79OI4, 79RST, M79SH, RC, SEQ, RE as an input option The SEL-151C relay can perform circuit breaker closing via the CLOSE command or a DC (Direct Close) input. - Page 6 There is no fault locator in the SEL-151C relay. Thus, the SEL-151C relay does not have the following SEL-151 relay settings: R1, X1, R0, X0, RS, XS, LL (line impedance and length parameters) SEL-151C R XTRA LEMENTS AND ETTINGS IN THE...
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Page 7: Front Panel Target Led Differences
Rows 5–8 are additional symbols for the SEL-151C relay only LED D RONT ANEL ARGET IFFERENCES The two right most target LEDs indicate enable (EN) and alarm (ALRM) in the SEL-151C relay. Date Code 910703 SEL-151C Addendum SEL-151 Instruction Manual... - Page 8 IRMWARE DENTIFICATION IFFERENCES See Firmware Identification in Section 4: EVENT REPORTING in the SEL-151 Instruction Manual for comparison. For the SEL-151C relay family, version specifications are interpreted as follows: V[VS] = V[ABCDEFG] Option Specifier Specifier Meaning Option Description 5, 6...
- Page 9 Figure 2: SEL-151C Distribution Bus Relay Horizontal Front and Rear Panel Drawings Date Code 910703 SEL-151C Addendum SEL-151 Instruction Manual...
- Page 94 The STATUS report format appears below. =>STATUS <ENTER> Example 21.6 kV distribution feeder Date: 7/1/92 Time: 01:08:44 SELF TESTS W=Warn F=Fail 5.11 15.15 -14.91 => The OS row indicates measured dc offset voltages in millivolts for the seven analog channels. An out-of-tolerance offset is indicated by a W (warning) or F (failure) following the displayed offset value.
- Page 95 Table 3.2: Target LED Assignment LED: 1 INST Front Panel Targets 51QP 51NP 50NL 50NH Relay Word row R1 50LT 51QT 50QT 51NT 50NLT 27 Relay Word row R2 79RS 79CY 79LO 79SH 52AT 52BT Relay Word row R3 PDEM QDEM NDEM TF TCMA ST TRIP...
- Page 96 When you are finished, type TAR 0 <ENTER> to return to the functions marked on the front panel so field personnel do not misinterpret displayed data. When a serial port times out (see TIME1, TIME2 settings) and an automatic message is sent to that port, the relay automatically clears the targets and displays the TAR 0 data.
- Page 97 TRIGGER TRIGGER generates an event record. After command entry, the relay responds "Triggered" and displays a record summary. =>TRIGGER <ENTER> TRIGGER <ENTER> TRIGGER <ENTER> TRIGGER <ENTER> Triggered => Example 21.6 kV distribution feeder Date: 7/1/92 Time: 10:45:20 Event : TRIG Location: Shot: Targets:...
- Page 146 Figure 5.9: Phase-To-Phase Fault on Delta-Wye Transformer Secondary 5-18 Applications Date Code 921113 SEL-151 Instruction Manual...
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Page 147: Underfrequency Load-Shedding Input
UNDERFREQUENCY LOAD-SHEDDING INPUT Relay Word inputs IN5 and IN6 can be used as time-qualified underfrequency load-shedding inputs. The output of an underfrequency relay is wired into IN5 or IN6. Using SEL Control Equations: OGIC K(1234) = IN5 Figure 5.10: Input IN5 Qualified by Time TKPU Time TKPU qualifies the underfrequency input condition.
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