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Fuses provide power and control circuit protection by interrupting current under
certain overload and fault conditions.
certain overload and fault conditions.
Some fuse failures are self evident. Loss of meter indication or control circuit
operation may indicate a blown (open) fuse. Other fuses that are critical to equipment
operation may be monitored and their opening alarmed. However, some fuse
operation cannot be detected remotely and should be assessed by regular maintenance.
It may be as simple as looking for the "fuse operated" indicator on the fuse, or it may
require checking with an ohmmeter. Failure to do so may result in more significant
failure leading to an outage.
operation may indicate a blown (open) fuse. Other fuses that are critical to equipment
operation may be monitored and their opening alarmed. However, some fuse
operation cannot be detected remotely and should be assessed by regular maintenance.
It may be as simple as looking for the "fuse operated" indicator on the fuse, or it may
require checking with an ohmmeter. Failure to do so may result in more significant
failure leading to an outage.
Maintenance or Test
Recommended Interval
Reference
Review equipment ratings
5 years
NERC Planning Standard
Visual inspection
3-6 months
NFPA 70B.13 and
Appendix H
Appendix H
Remove and check
3-6 years
NFPA 70B.13 and
Appendix H
Appendix H
Infrared scan
Annually
NFPA 70B.13 and
NFPA 70B, 18-17 and
Appendix H
NFPA 70B, 18-17 and
Appendix H
Generators produce electrical energy from mechanical power transmitted from the
turbine. Large motors drive pumps to move water. Generators and large motors
included in this section are synchronous machines performing the primary function of
the power or pumping plant. Small motors are covered in the section, "Motors."
turbine. Large motors drive pumps to move water. Generators and large motors
included in this section are synchronous machines performing the primary function of
the power or pumping plant. Small motors are covered in the section, "Motors."
Maintenance references and standards from which the recommendations are drawn
are numerous:
are numerous:
·
Manufacturers Instruction Books
·
FIST Volume 3-1, Testing Solid Insulation of Electrical Equipment