Page 12-1
IL17569
Effective June, 2001
12 TROUBLESHOOTING
There are two aspects to troubleshooting:
1. Failures in the system being protected.
2. Failures of the FP-5000 relay.
The FP-5000 can be programmed to record data during system
faults, which can be analyzed to determine the cause of faults. The
FP-5000 continuously determines its own ability to function, if any
internal failures are detected the FP-5000 can raise an alarm. For
information on troubleshooting the FP-5000 relay failures see
Section 12.1. For information on troubleshooting the circuit the
FP-5000 is protecting, see Section 12.2.
The FP-5000 firmware can be revised in the field by using a PC and
the front mounted serial port on the FP-5000 Section 12.4 covers
the procedures for upgrading the firmware in the field.
12.1 Troubleshooting the Relay
The FP-5000 performs a great many self-checks on a continuous
basis to warn the operating personnel of impending or actual failure,
and allowing steps to be taken to minimize the impact of such
failure. Some internal failures will not effect the ability of the FP-
5000 to protect the circuit while others will. Detected failures of the
FP-5000 will cause the relay healthy contact output to de-energize,
see Section 12.1.1. All FP-5000 failures will cause the Alarm LED
on the front panel to light, and the condition to be reported over the
INCOM communication network usually displayed in the PowerNet
application software. The front display will also indicate failures and
is described in Section 12.1.3.
12.1.1 Relay Healthy Output
The relay healthy alarm is a crucial part of notification for relay
failure. This contact output is energized during normal operation,
when no warnings or failures are present. The relay healthy contact
output is a Form C relay. Typically the normally closed contacts are
used and wired to an alarm that is guaranteed to get immediate
attention. If an FP-5000 relay self diagnostic failure is detected, the
relay healthy alarm will be de-energized and the alarm will be
sounded. In the case of a catastrophic failure of the FP-5000 or its
control power supply, the normally closed relay will cause an alarm
whenever power is removed from the relay healthy contact output.
WARNING
FAILURE TO UTILIZE THE RELAY HEALTHY CONTACT OUTPUT
IN A MANNER THAT WILL BRING IMMEDIATE ATTENTION IF
DE-ENERGIZED CAN RESULT IN A FAILURE TO PROTECT THE
CIRCUIT FOR EXTENDED PERIODS OF TIME.
12.1.2 Failures That Disable Protection
In the case that an FP-5000 critical failure is detected, the protec-
tion functions of the FP-5000 are disabled, and all output relays
except relay healthy will remain in their current state. The relay
healthy output will be de-energized as described in Section 12.1.1.
Protection is disabled so that a false trip operation will not occur. If it
is desired to trip the breaker upon FP-5000 failure then the relay
healthy alarm should be connected to the breaker trip coil in parallel
with the trip output contact. Table 12.1, under the “Protection”
column, shows what diagnostic test failures will cause protection to
be disabled.
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...