Residential Standby Generator Motor Inrush & Sub-Transient Voltage Dip Matrix
Locked Rotor Amperage (LRA), sub-transient reactance (X''d) voltage dip envelopes, and solid-state soft starter surge reduction factors referencing NEMA MG-1 and ISO 8528-5 standards.
1. Abstract & Dataset Scope
Provides a deterministic engineering benchmark matrix modeling starting surge apparent power, peak instantaneous locked-rotor amperes (LRA), alternator sub-transient voltage dips, and solid-state soft starter surge reductions across residential motor-driven loads (central air conditioners, heat pumps, well pumps, sump pumps) referencing NEMA MG-1 and ISO 8528-5.
2. Technical Methodology & Benchmark Formulation
Deterministic numerical modeling of inductive motor inrush dynamics based on NEMA Code Letter kVA/HP ranges (NEMA MG-1 Table 10-22), standard sub-transient reactance characteristics (X''d = 0.12–0.18 p.u.), and solid-state soft starter torque/current ramp attenuation (typically 60%–70% LRA reduction). Values represent standardized benchmark scenarios rather than certified dynamometer test data for specific manufacturer generators.
3. Data Dictionary & Variable Definitions
| Variable Name | Symbol | Unit | Type | Description | Example |
|---|---|---|---|---|---|
| Equipment Identifier | App_ID | Text Key | String | Unique appliance load classification identifier | ac_central_3_0_ton |
| Equipment Description | Name | Equipment Name | String | Nominal induction motor load description | 3.0-Ton Central AC Compressor |
| Equipment Category | Category | System Classification | String | Load domain (HVAC, Water_Pumping, Drainage, Refrigeration, Machinery) | HVAC |
| Nominal Motor HP | HP | Horsepower (HP) | Float | Nominal shaft power rating of induction motor | 3 |
| Nominal Voltage | Volts | Volts (V) | Integer | Standard single-phase line voltage rating | 240 |
| NEMA Code Letter | NEMA_code | Code Letter | String | NEMA MG-1 locked-rotor kVA/HP starting classification | G |
| kVA / HP Range | kVA_range | kVA/HP | String | NEMA locked rotor apparent power envelope | 5.6-6.29 |
| Continuous Full Load Amps | FLA | Amperes (A) | Float | Continuous running full load current | 13.4 |
| Continuous Running Power | P_run | Watts (W) | Integer | Active running electrical wattage | 3216 |
| Raw Starting Inrush Amps | LRA_raw | Amperes (A) | Float | Instantaneous across-the-line starting current | 71 |
| Inrush Multiplier | Inrush_mult | Ratio (LRA/FLA) | Float | Starting current multiplier relative to continuous FLA | 5.3 |
| Peak Starting Surge Power | P_surge_raw | Watts (W) | Integer | Peak across-the-line surge power required from generator alternator | 17040 |
| Inductive Surge Delta | Delta_surge | Watts (W) | Integer | Additional surge capacity required above continuous running load | 13824 |
| Soft-Start Mitigated LRA | LRA_soft | Amperes (A) | Float | Attenuated peak starting current using solid-state soft starter | 22.7 |
| Soft-Start Peak Surge Power | P_surge_soft | Watts (W) | Integer | Mitigated peak starting wattage with soft starter installed | 5448 |
| Min Recommended Continuous Generator | Gen_cont_w | Watts (W) | Integer | Minimum recommended generator continuous running wattage | 4500 |
| Min Recommended Surge Generator | Gen_surge_w | Watts (W) | Integer | Minimum recommended generator surge wattage capability | 17500 |
4. Sample Data Records Preview
Displaying 6 representative rows (Full dataset contains 18 Records)| equipment name | category | hp | running w | lra raw a | raw surge w | soft lra a | soft surge w | min gen kw |
|---|---|---|---|---|---|---|---|---|
| 2.5-Ton Central AC Compressor | HVAC | 2.5 | 2688 | 58 | 13920 | 18.5 | 4440 | 3.5 |
| 3.0-Ton Central AC Compressor | HVAC | 3 | 3216 | 71 | 17040 | 22.7 | 5448 | 4.5 |
| 4.0-Ton Central AC Compressor | HVAC | 4 | 4296 | 96 | 23040 | 30.7 | 7368 | 6 |
| 5.0-Ton Central AC Compressor | HVAC | 5 | 5232 | 118 | 28320 | 37.8 | 9072 | 7.5 |
| 0.5 HP Deep Well Submersible Pump | Water_Pumping | 0.5 | 1176 | 28 | 6720 | 11.2 | 2688 | 2 |
| 1.0 HP Deep Well Submersible Pump | Water_Pumping | 1 | 1968 | 46 | 11040 | 18.4 | 4416 | 2.8 |
5. Limitations & Engineering Disclaimer
This dataset is a deterministic engineering simulation and benchmark matrix. It is not certified laboratory test data, does not replace generator manufacturer submittal data or sizing software, does not guarantee engine recovery without stall for unmodeled load combinations, and does not constitute ISO 8528 or NFPA 70/110 compliance certification.
6. Dataset Citation (BibTeX / APA / IEEE)
When referencing this dataset in academic preprints, technical reports, or computational tooling, please cite using the formal reference metadata below:
APA Style
IEEE Style
BibTeX Record
@dataset{powerlab_2026_generator_dataset,
author = {Miad S. and {PowerLab Clean Energy Engineering Group}},
title = {Residential Standby Generator Motor Inrush & Sub-Transient Voltage Dip Matrix},
year = {2026},
publisher = {Figshare & Hugging Face},
version = {1.2.0},
doi = {10.6084/m9.figshare.33753856},
url = {https://www.powelab.org/datasets/standby-generator-motor-inrush-voltage-sag-benchmark}
}