98 lines
2.5 KiB
Markdown
98 lines
2.5 KiB
Markdown
# Future Sizing and Calculation Requirements
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These requirements are not part of the first implementation, but the structure should support them.
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## Goal
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The app should later support rule-based protection and cable sizing.
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Future suggestions or checks may include:
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- protection device type
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- rated current
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- tripping characteristic
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- cable type
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- number of cores
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- cable cross-section
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- minimum cable cross-section based on current
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- maximum permissible cable length based on voltage drop
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- warning messages if cable length, cross-section or protection device do not match
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Users must remain able to manually override suggestions.
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## Initial Design Rule Examples
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These are common planning defaults, not a replacement for full norm-compliant calculation.
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### Lighting Circuits
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Lighting circuits in section `-1Fx` usually use:
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- protection rated current: 10 A
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- cable cross-section: 1.5 mm²
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Typical cable type:
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- non-DALI lighting: 3x1.5 mm²
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- DALI-capable lighting: 5x1.5 mm²
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The app should later suggest the cable type based on whether the connected luminaires require DALI or additional control cores.
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### Standard Single-Phase Circuits
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Standard single-phase circuits in section `-2Fx` usually use:
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- protection rated current: 16 A
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- cable cross-section: 2.5 mm²
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This applies to many typical socket circuits and standard single-phase loads.
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### Special Loads and Long Cable Runs
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For non-standard loads or long cable runs, voltage drop becomes more important.
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Examples:
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- instantaneous water heaters
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- socket combinations with higher connected load
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- outdoor circuits with long cable routes
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- lighting circuits with looped-through luminaires and cable lengths of 80 to 100 m
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The app should later show warnings or require review if voltage drop becomes critical.
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## Future Field: Control Requirement
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To support cable suggestions for lighting circuits, devices or circuits may later include a control requirement.
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Example values:
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- none
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- DALI
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- KNX
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- switched only
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- dimmable
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- other
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For lighting circuits:
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- no additional control cores: suggest 3x1.5 mm²
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- DALI required: suggest 5x1.5 mm²
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This must be configurable and manually overridable.
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## Future Voltage Drop Check
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A future voltage drop check may use:
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- phase type
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- voltage
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- circuit total power
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- apparent power or current
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- cable material
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- cable cross-section
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- cable length
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- protection rated current
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- allowed voltage drop
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The result should be shown as a warning or status indicator, not as an automatic forced change.
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