Appendix C. Interval Every 2 Year. Functional Test Weekly Monthly Quarterly. Semi. Every 3. Engineering Studies
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1 Engineering Studies Coordination Study Every 5 years and in conjunction with electrical system modifications. Short Circuit Study NETA MTS 6.2 Every 5 years and in conjunction with electrical system modifications. Arc Flash Analysis NETA MTS 6.1 Every 5 years and in conjunction with electrical system modifications. Consideration should also be given to recapitalization and NFPA-70E. Utility (Medium Voltage) Systems NETA MTS 6.3 Service entrance load measurements Medium voltage conductors and NETA MTS 7.3.3
2 connections Visual Inspection Infrared Scan Very Low frequency or Hipot test (DC) 1 1 It is important to understand that a Hi-pot test generates voltages and currents that can cause harm to testers or equipment. When considering a Hi-pot test, the tester should understand the risks, such as the potential to cause harm and/or potential damage to cables with extended service lives.
3 Utility (Medium Voltage) Systems Oil test (dielectric, acidity, color, pf interfacial tension) After transformer fuse or OCPD activation due to fault Oil test (dissolved gas) Insulation resistance (power factor) De-energized cleaning and testing After transformer fuse or OCPD activation due to fault Low Voltage(<600V) Systems Mechanical electrical distribution load measurements Low voltage conductors and Infrared scan NETA MTS connections Splices in conductors that support mission critical equipment Infrared scan
4 Low Voltage(<600V) Systems Dry type transformers Switchgear Infrared scan NETA MTS , cleaning/deenergizing is recommended every 1-2 years NETA MTS , consideration should be given to both switchgear and switchboards. Infrared scan De-energized cleaning and testing Test alarms and remote monitoring Control batteries and battery charger Backup PLC and system programs/ software After all changes in program and PLC reboot verifies program has been downloaded
5 Visual inspection Test batteries Instruments and metering Fuses and fuse holders Inspect and calibrate Inspect and test Functional Test Low Voltage(<600V) Systems Draw-out type breakers Operate breaker Internal inspection of the breaker Test and lubricate breaker Insulation resistance test Test trip unit (primary or secondary injection) Consideration also to NETA MTS when conducting Trip unit settings
6 Contact conductivity test Molded case circuit breakers NETA MTS Operate breaker Functional Test Low Voltage(<600V) Systems Test trip unit (primary or secondary injection) Refer to NETA MTS for primary versus secondary testing recommendations Panel boards Infrared scan Protective relays 2 NETA MTS 7.9.1, Test (timing, pickup, time delay) 2 Protective relays should be tested with its associated MV breaker to ensure control power/wiring, trip coil, and batteries work properly.
7 Check settings UPS System UPS Output Load Measurements Visual inspection Preventive maintenance per manufacturers recommendations
8 UPS System Transfer of UPS system to bypass Test alarms and remote monitoring VRLA batteries Per IEEE 1188 Wet cell batteries Per IEEE 450 Power Systems Directly Supporting DODIN Equipment Rectifiers and Battery Chargers NETA MTS , Visual inspection Preventive maintenance per manufacturers recommendations Load test of batteries using DODIN equipment as load Test alarms and remote monitoring
9 Power Systems Directly Supporting DODIN Equipment VRLA batteries Per IEEE 1188 Wet cell batteries Per IEEE 450 Generator Plant UPS output load measurements Visual inspection (temp > 32ᵒF) Visual inspection (temp < 32 ᵒF) Twice Per Week Test alarms and remote monitoring Engine Preventive maintenance per manufacturer recommendations Generator Vibration analysis (standby systems)
10 Generator Plant Batteries and battery charger Vibration analysis (continuous systems) Test batteries Fuel System Visual inspection Fuel System Filter Change Bi-weekly are also acceptable based on mission constraints Or manufacturer s recommendation if sooner Test Operational Tests Generator Operational run utilizing control test functions (with building load) Utility fail test Full load test with load banks should be performed annually After repair or modification to the controls of the generator plant
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