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built templatebusbar-designwith-tool

Busbar Forces

Calculates the electromagnetic force per unit length on the centre phase of a three-phase flat busbar arrangement during a symmetrical short circuit using Fm = (mu_0 / 2pi) * (sqrt(3)/2) * ip^2 / a, then derives peak span force and bending stress. Used to verify busbar mechanical adequacy in switchgear and substation design per IEEE 605 and IEC 60865-1.

inputs

7 fields

context

3 archetypes

engine

with-tool

outputs

3 scored fields

contract fields

Parameter Map

7 inputs to 3 scored outputs

  • peak_short_circuit_current_ka

    float

    Peak (asymmetrical) short-circuit current ip

    5 to 200kA

  • phase_spacing_mm

    float

    Centre-to-centre spacing between adjacent busbar phases

    50 to 1000mm

  • span_length_m

    float

    Span length between busbar supports

    0.3 to 3m

  • busbar_width_mm

    float

    Width of rectangular busbar cross-section

    20 to 200mm

  • busbar_thickness_mm

    float

    Thickness of rectangular busbar cross-section (bending direction)

    3 to 20mm

  • support_condition

    enumoptionalfrom archetypehidden in hard

    End support condition for the busbar span

    simply_supportedfixed_both_ends

  • busbar_material

    enumoptionalfrom archetypehidden in hard

    Busbar conductor material

    copperaluminium
force_per_m_ntol 0.03

Electromagnetic force per unit length on centre phase (N/m)

peak_force_ntol 0.03

Total peak force over one busbar span (N)

busbar_stress_mpatol 0.03

Maximum bending stress in the busbar (MPa)

visibility contract

Difficulty Ladder

all_giveneasy

LV switchboard, short span, all parameters given including support condition and material

all fields visible
all_givenmedium

Any voltage level and archetype, all parameters given

all fields visible
partialhard

Support condition and material hidden, agent must infer from installation context

support_conditionbusbar_material

scenario bands

Archetype Atlas

lv_switchboard

2 contexts

Low-voltage switchboard busbar (400-480 V)

peak_short_circuit_current_ka10 to 50
phase_spacing_mm60 to 185
span_length_m0.3 to 0.8
busbar_width_mm20 to 60

commercial-switchroom / industrial-mcc-room

mv_switchgear

2 contexts

Medium-voltage metal-clad switchgear busbar (11-33 kV)

peak_short_circuit_current_ka25 to 80
phase_spacing_mm150 to 300
span_length_m0.5 to 1.5
busbar_width_mm40 to 100

zone-substation-switchroom / industrial-hv-room

outdoor_substation

2 contexts

Outdoor air-insulated substation rigid bus (66-132 kV)

peak_short_circuit_current_ka50 to 200
phase_spacing_mm300 to 1000
span_length_m1 to 3
busbar_width_mm80 to 200

transmission-substation / bulk-supply-substation

rendered task

Generation Preview

zone-substation-switchroom-mv-switchgear-preview

difficulty
hard
visibility
partial
archetype
mv_switchgear
site context
zone-substation-switchroom
instruction excerptbusbar-forces_calc.py

visible fields

  • peak_short_circuit_current_ka25 to 80 kA
  • phase_spacing_mm150 to 300 mm
  • span_length_m0.5 to 1.5 m
  • busbar_width_mm40 to 100 mm
  • busbar_thickness_mm5 to 12 mm

withheld schema

busbar_materialsupport_conditionforce_per_m_npeak_force_nbusbar_stress_mpa
Medium-voltage metal-clad switchgear busbar (11-33 kV). zone-substation-switchroom. Required outputs: force_per_m_n, peak_force_n, busbar_stress_mpa