Generated · Data-documentation form — not an automatic compliance determination
Rated current is derived from these values. Provide kVA (or kW + power factor) and the nominal line-to-line voltage to enable expected-current evaluation.
Rated current is computed as I = kVA × 1000 / (√3 × VL-L) for three-phase and
I = kVA × 1000 / VL-L for single-phase. Without kVA — or kW together with power factor — expected current
cannot be derived, and the current-deviation column stays unevaluated rather than guessing.
If you enter a line-to-neutral voltage, the reference line-to-line value is reconstructed as √3 × VL-N
on a three-phase wye machine and 2 × VL-N on a single-phase three-wire (120/240) machine. Choose the basis that
matches the nameplate, because every voltage-deviation check is measured against it.
Choosing a NETA basis makes the record ask for the manufacturer acceptance-criteria source, the nominal generator voltage, and at least one measured reading, because NETA acceptance and maintenance testing is evaluated against manufacturer-published criteria rather than against a single universal number.
Choosing an NFPA 110 basis opens the EPSS classification and step-load schedule. Level reflects how critical the load is, Class is the minimum runtime at rated load in hours, and Type is the maximum time in seconds the load may be without acceptable power — so a measured transfer time longer than the declared Type is flagged as a violation. A diesel EPS exercised monthly is expected to reach at least 30% of nameplate kW, or to meet the manufacturer's exhaust-gas temperature criterion instead; where neither is confirmed, the record says so.
Record each load step. Common supplemental/load-bank expectations (e.g., 50% for 30 min, 75% for 60 min) are validated as configurable warnings, not hard rules.
| Load % | Target kW | Start | Stop | Duration (min) | Actual kW | Freq Range (Hz) | Voltage Range (V) | Coolant ° | Oil Press | Exhaust ° |
|---|
Imbalance uses the NEMA convention — max deviation from average ÷ average × 100 — applied to the three
line-to-line voltages and to the three line currents. Voltage imbalance is the harsher of the two in service: a small voltage
imbalance drives a much larger current imbalance and disproportionate rotor heating, which is why its default limit is tighter.
I Dev % compares the average measured current against the current expected at the recorded load percentage. It is only evaluated once rated current can be derived from the nameplate; otherwise it shows an em-dash rather than a misleading number. Cells outside the configured tolerance are highlighted, and every exceedance is itemized in the Report tab.
| Time | Load % | Power (kW) | Voltage L-L (V) | Line Current (A) | Freq (Hz) | V Imbal % | I Imbal % | I Dev % | Status | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A-B | B-C | C-A | A | B | C | |||||||||
This table records what the generator's own control panel displayed, kept deliberately separate from the calibrated-instrument readings on the Measured Results tab. Comparing the two is the point: a panel meter that disagrees with a calibrated instrument is itself a finding, and only the calibrated readings are evaluated against the acceptance tolerances.
Engine hours, fuel pressure, water temperature, and oil pressure recorded here establish the machine's operating condition at the time of test and give the next technician a baseline to trend against.
| Time | Phase A (V) | Phase B (V) | Phase C (V) | Current A | Current B | Current C | Freq (Hz) | Engine Hrs | Fuel Press | Water Temp | Oil Press |
|---|
Any item marked Unsatisfactory is recorded as a deficiency: it raises the alarm banner, appears in the Report violations list, and prevents the computed status from reading as a pass. Use N/A where an item genuinely does not apply to this machine rather than leaving it unchecked, so the record distinguishes "inspected and not applicable" from "not yet inspected."
Test equipment calibration is part of the same record. An instrument whose calibration came due before the test date invalidates the readings taken with it, so it is flagged the same way an out-of-tolerance measurement would be.
| Item | Result |
|---|
| Test | Result |
|---|
| Instrument Type | Make / Model | Serial Number | Calibration Date | Calibration Due |
|---|
The reactances and time constants recorded here are nameplate or manufacturer data-sheet values, not measurements taken during this
test. They are captured because downstream studies depend on them: Xd'' sets the generator's contribution to the initial
symmetrical fault current, X0 and X2 feed unbalanced-fault and symmetrical-component analysis, and the X/R ratio
determines the DC offset that asymmetrical duty is based on.
Recording them alongside the test data means the coordination and arc-flash studies that reference this machine can be traced back to a specific serial number and test date.
These plots plot every measured row in the order it was entered, so they document steady-state behaviour and the machine's response across load steps. A flat frequency trace through a step change is evidence of a governor holding isochronous control; a visible sag that recovers shows the transient dip and recovery time. Voltage traces separating from one another indicate a growing imbalance under load.
Charts are rendered for print as well as on screen, so the graphical evidence travels with the report rather than living only in the browser.
The computed status is derived from entered data and criteria. A manual override is recorded separately and requires a reason — it never replaces the computed result.