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Field Testing & Twin SaaS
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#08Diesel / Gas Generator Inspection

Project Framework (report reference): IEC 60364-4-41Applicable Standard: NFPA 110
Module Field Guides, Standard Selection & Tutorials (3)Browse All 93+ Guides →
1 · Field Measurement ProcedureHow to Measure & Test Generator Inspection on Site: Step-by-Step Field Procedure (NFPA 110)2 · Standards & Limit TablesWhich Standard Applies to Generator Inspection? Acceptance Limits, Annex Tables & Regional Equivalents (NFPA 110)3 · OhmCert Tutorial & Case StudyHow to Complete a Generator Inspection Certificate in OhmCert: Worked Case Study & Troubleshooting

Multi-Asset / Multi-Point Equipment Schedule

Inspect multiple transformers, panels, rooms, motors, or RCDs in this module without overwriting previous assets. Each item receives a permanent QR Sticker UID preserved across annual audits.

Sticker UID: OC-GENE-C5A3
Plant & SLD (Auto-SLD)

Standard Limits, Equations & Space Presets

NFPA 110 Type 10 Emergency Power Supply System (EPSS) 10 s start-to-load requirement, 30% minimum exercise load, and ISO 8528-5 G1/G2/G3 frequency and voltage transient classes.

One-Click Normative Presets (Auto-fills Target Limits)

Measured Inputs

Calculated / Evaluated Results

Acceptance: a Type 10 EPSS must start and accept load within 10 s (NFPA 110 Table 4.1(b)). Steady-state and transient frequency / voltage bands follow the ISO 8528-5 performance class selected below.

Pending / Not tested — results stay neutral until valid measured values are entered.

  • NFPA 110 Minimum Exercise Load (30% Rated)

    -

    NFPA 110 §8.4.2 requires monthly on-load exercise at >= 30% of nameplate kW rating to prevent diesel wet-stacking.

    Pending

  • Start to On-Load Time

    - s

    Not tested - enter the measured value. Acceptance: Type 10 EPSS: the set must accept the emergency load within 10 s [NFPA 110 Table 4.1(b)]

    Pending

  • Steady State Frequency Band

    - %

    Not tested - enter the measured value. Acceptance: Class G2: +/-1.5% steady state [ISO 8528-5 Table 4]

    Pending

  • Transient Frequency Deviation

    - %

    Not tested - enter the measured value. Acceptance: Class G2: +/-12% on a full load step [ISO 8528-5 Table 4]

    Pending

  • Frequency Recovery Time

    - s

    Not tested - enter the measured value. Acceptance: Class G2: recovery within 5 s [ISO 8528-5 Table 4]

    Pending

  • Transient Voltage Deviation

    - %

    Not tested - enter the measured value. Acceptance: Class G2: +/-20% on a full load step [ISO 8528-5 Table 5]

    Pending

  • Fuel Level

    - %

    Not tested - enter the measured value. Acceptance: Tank >= 75% and sized for the declared EPSS class run time [NFPA 110 §5.5 practice]

    Pending

  • Starting Battery Voltage

    - V

    Not tested - enter the measured value. Acceptance: Resting voltage >= 25.2 V for a 24 V system [SAE J537 field convention]

    Pending

  • Total Run Hours

    - h

    Compare against the OEM service interval.

    Pending

Verification Checklist (0 / 18)

Pending

  • 1Generator control selector switch verified in 'AUTO' mode with zero active fault lockouts [NFPA 110 §8.4]

  • 2Jacket water block heater operational and maintaining engine coolant at 32-49 degC for immediate cold start

  • 3Engine lube oil level, viscosity, and pressure sender verified; zero oil weepage at crank seals

  • 4Radiator coolant level, glycol freeze/inhibitor concentration, belt tension, and hoses inspected

  • 5Day-tank and bulk fuel levels verified (>= 8-48h autonomy per Tier rating); water separator drained and fuel polished

  • 6Starting battery string (12V/24V) open-circuit, float voltage, specific gravity/conductance, and cranking voltage drop tested

  • 7Static battery charger float/equalize output and low-DC-voltage alarm relay verified

  • 8Motorised intake and discharge ventilation louvres proven to open fully on engine start command

  • 9Exhaust manifold thermal blankets, flexible bellows, silencer, and rain cap intact and leak-free

  • 10Anti-vibration spring/elastomer mounts, foundation anchor bolts, and flexible fuel/electrical connections sound

  • 11Simulated mains failure cold-start test completed: cranking, firing, and load acceptance within <= 10 s (NFPA 110 Type 10)

  • 12Electronic governor (droop / isochronous) steady-state and step-load frequency response verified per ISO 8528-5 Class G2/G3

  • 13Automatic Voltage Regulator (AVR) steady-state voltage regulation (+/-1%) and reactive load sharing verified

  • 14Monthly on-load exercise run conducted at >= 30% rated nameplate kW (or exhaust temp >= OEM minimum) to prevent wet-stacking

  • 15Alternator winding and bearing RTD temperatures, plus stator insulation resistance, within OEM limits

  • 16Engine safety shutdowns proven (overspeed, low oil pressure, high coolant temp, overcrank)

  • 17Local and remote Emergency Stop buttons, automatic fuel shutoff valve, and room fire damper interlocks tested

  • 18BMS / SCADA telemetry alarms (Not-in-Auto, Low Fuel, Charger Fail, Common Fault) verified end-to-end

General Notes

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Free plan: 5 of 5 inspections / calculations left this month.