Issue:
Integrated rating calculation for HVL switches
Product Line:
Switchgear
Environment:
Installation/Setup
Resolution:
Integrated rating for HVL switches with boric acid fuses:
The integrated rating is limited by the switch to less than the full interrupting capability of the fuse.
Three Phase MVA = system nominal voltage, kV X symmetrical amperes, kA X 1.732
For example on the 38kV HVL switch - look for the lowest rating of the switch. In this case it is the fault close rating of 20kA Asym.
20kA Asym Amps = 12.5kA Sym Amps
The nominal voltage is 34.5kV for this example.
Therefore the Three Phase MVA is 34.5kV X 12.5kA X 1.732 =
747 MVA
Integrated ratings can be found in Tables in the Pricing Guides and Catalog Sections for the Product.
CTA-ID : 2011148
Integrated rating calculation for HVL switches
Product Line:
Switchgear
Environment:
Installation/Setup
Resolution:
Integrated rating for HVL switches with boric acid fuses:
The integrated rating is limited by the switch to less than the full interrupting capability of the fuse.
Three Phase MVA = system nominal voltage, kV X symmetrical amperes, kA X 1.732
For example on the 38kV HVL switch - look for the lowest rating of the switch. In this case it is the fault close rating of 20kA Asym.
20kA Asym Amps = 12.5kA Sym Amps
The nominal voltage is 34.5kV for this example.
Therefore the Three Phase MVA is 34.5kV X 12.5kA X 1.732 =
747 MVA
Integrated ratings can be found in Tables in the Pricing Guides and Catalog Sections for the Product.
CTA-ID : 2011148
Released for:Schneider Electric USA
