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ACSR conductor · 200 mm² nominal

PANTHER Conductor — Specification & Current Carrying Capacity

30/3.00 mm Al + 7/3.00 mm steel · 261.54 mm² total area · 21.00 mm overall diameter · 974 kg/km · 0.1363 Ω/km at 20 °C · 89.67 kN breaking load · about 487 A.

The standard 132 kV transmission conductor in India; also heavy 66 kV lines.

Calculate PANTHER ampacityCompare with other conductors

Full technical specification

Data basis: IS 398 and standard manufacturer catalogues. Individual manufacturers vary slightly — confirm against the supplier datasheet before final design.

Code namePANTHER
FamilyACSR
MaterialAluminium strands over a 7-wire galvanised steel core
Stranding30/3.00 mm Al + 7/3.00 mm steel
Aluminium strands30 × 3 mm
Steel strands7 × 3 mm
Aluminium area212.06 mm²
Steel area49.48 mm²
Total area261.54 mm²
Nominal (trade) area200 mm²
Overall diameter21.00 mm
Approximate weight974 kg/km
DC resistance at 20 °C0.1363 Ω/km
Calculated AC resistance at 75 °C0.1748 Ω/km
Ultimate breaking load89.67 kN
Current carrying capacity487 A (standard basis)

Construction of PANTHER

PANTHER is built as 30/3.00 mm Al + 7/3.00 mm steel. Aluminium strands over a 7-wire galvanised steel core. The steel core takes most of the mechanical tension so the aluminium can be sized purely for current, which is what lets ACSR span long distances between towers. The total metallic area of 261.54 mm² and overall diameter of 21.00 mm set both the resistance and the wind/ice loading the structures must carry.

Where PANTHER is used

The standard 132 kV transmission conductor in India; also heavy 66 kV lines. At 487 A on the standard basis, a three-phase circuit of PANTHER carries roughly 9 MVA at 11 kV, 28 MVA at 33 kV and 111 MVA at 132 kV — useful as a first sanity check before detailed load flow.

Conditions behind the current rating

Ambient 40 °C, maximum conductor temperature 75 °C, cross-wind 0.61 m/s, solar radiation 1000 W/m², emissivity 0.9, absorptivity 0.8, outdoor overhead installation (IEEE 738 / IS 398 practice).

  • Wind is the single biggest variable. Removing it drops the rating of PANTHER from 487 A to 269 A in the cases above.
  • Raising the permitted conductor temperature increases the rating, but sag and long-term annealing of the aluminium set the practical ceiling — 75 °C continuous is the usual limit.
  • A weathered, dark conductor absorbs more sunlight but also radiates heat better; the standard 0.8 absorptivity / 0.9 emissivity pair is the conservative combination.
  • Terminations, jumpers and clamps often limit a line before the conductor does. Check the whole current path, not only the span.

Other ACSR conductors

SQUIRREL

6/2.11 mm Al + 1/2.11 mm steel · 115 A

WEASEL

6/2.59 mm Al + 1/2.59 mm steel · 150 A

FERRET

6/3.00 mm Al + 1/3.00 mm steel · 185 A

RABBIT

6/3.35 mm Al + 1/3.35 mm steel · 208 A

MINK

6/3.66 mm Al + 1/3.66 mm steel · 234 A

RACCOON

6/4.09 mm Al + 1/4.09 mm steel · 270 A

Calculators for this conductor

Conductor Current Capacity Calculator

Recalculate PANTHER ampacity for your own weather and temperature limit.

Voltage Drop Calculator

Check the drop over the span length you are planning.

AWG to sq mm Converter

Translate the area into American gauge sizes.

Transformer Sizing Calculator

Match the feeder to the transformer it supplies.

AC Cable Sizing Calculator

For the insulated cable portions of the same circuit.

Wire Gauge Chart

AWG to mm² reference table.