Naval Ship Electrical Load, Power Margin & Generator Redundancy Tool

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Need port/starboard bus sections, generator derating and essential-load survivability? Click Advanced above.Advanced separates immediate loss-of-largest-online-generator capability from restored N-1 plant capacity. It also keeps fast reserve / ESS separate from sustained generator MW so a short-duration battery is not incorrectly counted as permanent redundancy.

Fast Generation & Redundancy Screen

Normal online capacity and N-1 plant capacity use the entered planned continuous loading limit. The largest-step check uses raw online nameplate headroom because short-duration transient capability is distinct from sustained operating margin.

Ship-service / hotel steady loadMW.

Mission / sensor / weapon concurrent loadMW included in the modeled operating condition.

Electric propulsion / major drive concurrent loadMW. Enter 0 for mechanically propelled conditions.

Future electrical-load growth allowance% applied to current modeled demand.

Main generator sets available

Generator rating / setMW nameplate per set.

Generators normally online

Planned continuous loading limit% of generator nameplate used for sustained planning.

Largest expected step loadMW instantaneous load addition.

Essential post-casualty loadMW to be maintained after shedding non-essential loads.

System Reserve & Casualty Basis

Target normal operating reserve margin% of adjusted full demand.

Automatic / rapid load shedding availableMW that can be removed rapidly after generation loss.

Fast reserve / ESS powerMW available immediately.

Fast reserve / ESS durationminutes at entered MW.

Required bridge / restart support durationminutes of short-duration fast reserve required before standby generation/load shedding is assumed established.

Generator Group Register

Available-capacity percentage is a deterministic derating factor for the modeled condition, not a reliability probability. Normally-online quantity cannot exceed installed quantity.

Generator group	Bus section	Installed qty	Normally online qty	Unit rating MW	Available capacity %	Planned cont. load %

Electrical Load Group Register

Demand factor handles non-coincident connected load. Growth allowance is applied after demand factor. Essential share is the portion that must remain energized after non-essential shedding in the modeled casualty condition.

Load group	Bus section	Connected / peak MW	Demand factor %	Growth %	Essential share %	Largest step MW

Electrical planning screen only: this tool does not replace a naval electric-load analysis, load-flow study, motor-start/step-load study, frequency/voltage transient study, short-circuit/protection coordination study, arc-flash study, harmonic study, zonal-survivability analysis, PMS design, emergency-power analysis or class/authority approval. A positive MW margin alone does not prove acceptable transient performance or casualty survivability.