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Emergency Power (Genset+UPS) Load Sequencing

NFPA 110 Type/Class classification, UPS-to-genset bridge timing check, and staged load-step pickup planner.

AAJappsEngineering Calculation Report

Emergency Power (Genset+UPS) Load Sequencing

NFPA 110, ISO 8528

Generated

For preliminary engineering use only — always verify results against project-specific standards and a qualified engineer's review before use in a real design.

Classification (NFPA 110 Type/Class)

Standard Basis

EPSS Level

Req'd Max Interruption

Req'd Min Runtime

UPS-to-genset bridge check

ATS Start Delay

Genset Crank-to-Rated

ATS Transfer Time

UPS/Battery Autonomy

Staged load-step pickup planner

Generator Rated Output

Max Single-Step Acceptance

Description

Priority

Time (s)

Classification result

NFPA 110 TypeType 10 (≤10s)

NFPA 110 ClassClass 48 (≥48h)

Genset Ready ≤ Required Interruption11.80s vs 10s ✗

Bridge check result

Genset Ready Time11.80 s

Bridge Checkpasses (≥25% margin, needs 14.75s) ✓

Load-step sequence result

t=5s: +50kW "Life-Safety Lighting" [Emergency (NEC 700)] → cumulative 50.0kW (10% of rating)

t=10s: +80kW "Load 2" [Legally-Req'd Standby (NEC 701)] → cumulative 130.0kW (26% of rating)

t=15s: +150kW "Load 3" [Optional Standby (NEC 702)] → cumulative 280.0kW (56% of rating)