Created By: {{ calcvals.CompanyName }}, For: {{ calcvals.ClientCompanyName }}
Project: {{ calcvals.ProjectNumber }} -- {{ calcvals.ProjectName }} -- {{ calcvals.SubProjectName }}
Cable Num.: {{ calcvals.CableNumber }}, From: {{ calcvals.FromLocation }}, To: {{ calcvals.ToLocation }}
Calculating...
{{ calcvals.CableNumber }} : Cable Sizing Calcualtion - Three Phase Load
Selected Cable
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 1.1)
Cable Destination
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 1.2)
Cable Source
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 1.3)
Cable Installation
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 1.4)
Calculation Summary
| Current Carrying Capacity | Cable Loading = {{calcvals.cableLoadingPercent}}% | |||
| Voltage Drop | Percent Drop = {{calcvals.voltagedroppercent}}% | |||
| Short Circuit Withstand | Minimum Cable Size is {{ calcvals.minCableCSA | number:3 }} mm² | Pass | ||
| Earth Fault Loop Impedance | Maximum Cable Length = {{ calcvals.maxLengthEarthLoop | number:3 }} meters | Pass |
** This Calculation was generated by www.Fast.Engineer - Engineering Accurate Instant **
{{ calcvals.CalcNumber }} - Rev: {{ calcvals.Revision }}
Page 1 of 5
Calc: {{ calcvals.CalcNumber }}, Rev: {{ calcvals.Revision }}
Cable #: {{ calcvals.CableNumber }}
Calculating...
Step 1 : Cable Current Carrying Capacity
Cable Rated Current
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 2.1)
Derating Data
| {{data.Col1}} | {{data.Col4}} | {{data.Col2}} | {{data.Col3}} |
(Table 2.2)
Calculating the Combined Derating Factor:
Cable Derated Current Capacity:
The Required Load Current Per Cable:
Check : Review the Cable Current Carrying Capacity
The cable is loaded at: {{calcvals.cableLoadingPercent}}%
Pass - Cable is Ok.
Fail - Cable is overloaded
** This Calculation was generated by www.Fast.Engineer - Engineering Accurate Instant **
{{ calcvals.CalcNumber }} - Rev: {{ calcvals.Revision }}
Page 2 of 5
Calc: {{ calcvals.CalcNumber }}, Rev: {{ calcvals.Revision }}
Cable #: {{ calcvals.CableNumber }}
Calculating...
Step 2 : Cable Voltage Drop
Looking Up the Cable Impedance:
Referencing standard 'AS/NZS 3008.1.1.2017' for a {{calcvals.MimsVoltage}} {{calcvals.CableType}} {{calcvals.CableFormation}}, three phase cable with {{calcvals.CableInsulation}} insulation and {{calcvals.CableFormation == "Multicore" ? calcvals.MulticoreArrangement : ""}} {{calcvals.Metal}} conductors laid in {{calcvals.SinglecoreArrangement}} at an operating temberature of {{calcvals.MimsTemp}} {{calcvals.CuTemp}}{{calcvals.AlTemp}}℃, finding the smallest cable with an impedance lower than {{calcvals.maxImpedance}} max impedance of {{calcvals.maxImpedance}} Ohm/m, we find that the resistance and reactance for a cable with {{calcvals.conductor}}mm² size conductors is:
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 3.1)
Calculating the Cables Impedance:
Calculate the Actual Voltage Drop:
The Voltage Drop is calculated from the equation
Cable Derated Current Capacity:
Check : Cable Voltage Drop
Pass - Voltage Drop is Ok.
The computed voltage drop equates to {{ calcvals.voltagedroppercent }} % of the supply voltage, this is less than the maximum permissable voltage drop.
Fail - Excessive Voltage Drop
The computed voltage drop equates to {{ calcvals.voltagedroppercent }} % of the supply voltage, which is greater than the maximum permissable voltage drop.
** This Calculation was generated by www.Fast.Engineer - Engineering Accurate Instant **
{{ calcvals.CalcNumber }} - Rev: {{ calcvals.Revision }}
Page 3 of 5
Calc: {{ calcvals.CalcNumber }}, Rev: {{ calcvals.Revision }}
Cable #: {{ calcvals.CableNumber }}
Calculating...
Step 3 : Short Circuit Withstand
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 4.1)
Calculate the Minimum Conductor Size:
The Smallest conductor size that can withstand the potential fault current
Check : Review the Cable Short Circuit Capacity
Pass - The {{ calcvals.conductor }} mm2 Cable is large enougth to withstand the potential fault current.
Fail - Cable is undersized for the potential fault current.
** This Calculation was generated by www.Fast.Engineer - Engineering Accurate Instant **
{{ calcvals.CalcNumber }} - Rev: {{ calcvals.Revision }}
Page 4 of 5
Calc: {{ calcvals.CalcNumber }}, Rev: {{ calcvals.Revision }}
Cable #: {{ calcvals.CableNumber }}
Calculating...
Step 3 : Earth Fault Loop Impedance
Calculate the Earth Fault Trip Current:
| {{data.Col2}} | {{data.Col3}} | {{data.Col4}} |
(Table 5.1)
The earth fault trip current is calculated from the equation
The Maximum Earth Loop Cable Length is calculated from:
Check : Maximum Cable Length for Earth Loop Impedance
Pass - Cable Length is Ok for earth fault loop impedance.
Fail - Cable is too long, and additional earth conductor will be required.
| Created By: |
{{ calcvals.CreatedBy }} |
Sign: __________________ |
| Checked By: |
{{ calcvals.CheckedBy }} |
Sign: __________________ |
| Approved By: |
{{ calcvals.ApprovedBy }} |
Sign: __________________ |
| Client Approved By: |
{{ calcvals.ClientApprovedBy }} |
Sign: __________________ |
** This Calculation was generated by www.Fast.Engineer - Engineering Accurate Instant **
{{ calcvals.CalcNumber }} - Rev: {{ calcvals.Revision }}
Page 5 of 5