IL17569
Page 8-10
Effective June, 2001
8.7 Wye versus Delta Voltage Transformers
The FP-5000 requires setting of system configuration parameters
for proper operation of all system functions (see programming
Section 5.1). All voltage settings are based on the VT input
configuration. Both wye (
φ
- G) and Delta (
φ
-
φ
) voltage connections
are supported. For wye-connected systems, the voltage settings are
based on phase-to-ground voltages. Voltage settings are based on
phase-to-phase voltages for delta-connected systems.
8.8 Frequency Protection (81)
The FP-5000 includes protective functions for detecting
under-frequency and over-frequency conditions. Two elements
are provided for each function so alarm and trip levels can be set
independently. Each of the frequency protection functions has
a Threshold and a Delay setting. The time delay is provided for
coordination with other devices. If the voltage on phase A drops
below 10 volts, the under-frequency and over-frequency functions
are disabled.
An over-frequency pickup occurs when the measured frequency
exceeds the over-frequency Threshold setting. The over-frequency
trip is set when the over-frequency condition exists for the delay
time specified. The over-frequency pickup and trip are reset when
the frequency drops below the over-frequency Threshold setting.
An under-frequency pickup occurs when the measured frequency
drops below the under-frequency Threshold setting. The under-
frequency trip is set when the under-frequency condition exists for
the delay time specified. The under-frequency pickup and trip is
reset when the frequency raises above the under-frequency
Threshold setting.
The settings for the over-frequency and under-frequency functions
are shown in Section 5, Programming and are repeated in Table 8.5.
Table 8.5 Frequency Protection Settings
Parameter
Range
Step
81U-1 Under
45 to 65 Hz,
0.1 Hz
Frequency
Disabled
Threshold
81U-1 Under
0 to 9999 Cycles
1 Cycle
Frequency
Time Delay
81O-1 Over
45 to 65 Hz,
0.1 Hz
Frequency
Disabled
Threshold
81O-1 Over
0 to 9999 Cycles
1 Cycle
Frequency
Time Delay
81U-2 Under
45 to 65 Hz,
0.1 Hz
Frequency
Disabled
Threshold
81U-2 Under
0 to 9999 Cycles
1 Cycle
Frequency
Time Delay
81O-2 Over
45 to 65 Hz,
0.1 Hz
Frequency
Disabled
Threshold
81O-2 Over
0 to 9999 Cycles
1 Cycle
Frequency
Time Delay
Summary of Contents for Cutler-Hammer FP-5000
Page 1: ...IL17569 Effective June 2001 Instructions for FP 5000 Protective Relay...
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Page 13: ...IL17569 Page 2 2 Effective June 2001 Figure 2 2 FP 5000 Simple Wye Connected Application...
Page 14: ...Page 2 3 IL17569 Effective June 2001 Figure 2 3 FP 5000 Simple Open Delta Application...
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Page 108: ...IL17569 Page 6 10 Effective June 2001 Figure 6 10 Common Ct Wiring Configurations...
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Page 165: ...IL17569 Page Appendix 6 Effective June 2001 Figure 13 2 ANSI Very Inverse...
Page 166: ...Page Appendix 7 IL17569 Effective June 2001 Figure 13 3 ANSI Extremely Inverse...
Page 167: ...IL17569 Page Appendix 8 Effective June 2001 Figure 13 4 IEC A Figure 13 4 IEC A...
Page 168: ...Page Appendix 9 IL17569 Effective June 2001 Figure 13 5 IEC B...
Page 169: ...IL17569 Page Appendix 10 Effective June 2001 Figure 13 6 IEC C...
Page 170: ...Page Appendix 11 IL17569 Effective June 2001 Figure 13 7 IEC...
Page 171: ...IL17569 Page Appendix 12 Effective June 2001 Figure 13 8 ANSI...
Page 172: ...Page Appendix 13 IL17569 Effective June 2001 Figure 13 9 Thermal...
Page 173: ...IL17569 Page Appendix 14 Effective June 2001 Figure 13 10 Phase I4 t...
Page 174: ...Page Appendix 15 IL17569 Effective June 2001 Figure 13 11 Phase I2 t...
Page 175: ...IL17569 Page Appendix 16 Effective June 2001 Figure 13 12 Phase It...
Page 176: ...Page Appendix 17 IL17569 Effective June 2001 Figure 13 13 Phase 12 I4 t...
Page 177: ...IL17569 Page Appendix 18 Effective June 2001 Figure 13 14 Phase I2 t...
Page 178: ...Page Appendix 19 IL17569 Effective June 2001 Figure 13 15 Ground IT...
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Page 187: ...Publication No IL17569 June 2001 Pittsburgh Pennsylvania U S A...