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PV Solar Project - 1100 KWP Block Size: Cable Calculation For Cable From Inverter To LT Breaker

The document calculates cable and bus duct requirements for a 1100 kWp PV solar project. It determines that 4 runs of 1C x 400 sqmm copper cable will be needed to carry the 2532 amps of current from the inverters to the low voltage breaker. It also specifies using a 3200 amp TP-E aluminum bus duct to carry the 2532 amps of current from the low voltage breaker to the transformer.

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Manohar Das
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444 views2 pages

PV Solar Project - 1100 KWP Block Size: Cable Calculation For Cable From Inverter To LT Breaker

The document calculates cable and bus duct requirements for a 1100 kWp PV solar project. It determines that 4 runs of 1C x 400 sqmm copper cable will be needed to carry the 2532 amps of current from the inverters to the low voltage breaker. It also specifies using a 3200 amp TP-E aluminum bus duct to carry the 2532 amps of current from the low voltage breaker to the transformer.

Uploaded by

Manohar Das
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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PV Solar Project - 1100 kWp Block Size

Cable Calculation for Cable from Inverter to LT Breaker


Inverter Details
Output of Inverter 1100 Kw

Voltage of Inverter 330 Volts

Current 1924.5574 Amps

Current at 0.95 PF 2025.8498 Amps

Derating of Current (With 0.8 factor) 2532.3123 Amps

Cable Details
Cable Used (LT XLPE (Cu)) 1 C X 400 SQmm

Current Carrying Capacity of 1 Run of 1 C X


400 Sqmm Cable (In Air) 660 Amps

No. of Runs Required 3.8368368 Nos.


No. of Runs Required 4 Nos.
BUS DUCT Calculation from LT Breaker to Transformer
Case - I
Output of Inverter 1100 Kw

Voltage of Inverter 330 Volts

Current 1924.5574 Amps

Current at 0.95 PF 2025.8498 Amps

Derating of Current (With 0.8 factor) 2532.3123 Amps


Switchgear Available 2500 Amp or 3200 Amp

BUS DUCT Details


3200 Amp ,TP-E (AL) Air
Bus Duct Proposed Insulated

Current Carrying Capacity of Bus Duct 3200 Amps

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