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Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

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5.3 SERVOPACK Main Circuit Wire Size5.3 SERVOPACK Main Circuit Wire SizeIMPORTANT1. Wire sizes were selected for three cables per bundle at 40 °C (104 °F) ambient temperature with the ratedcurrent.2. Use cable with a minimum withstand voltage of 600 V for main circuits.3. If cables are bundled in PVC or metal ducts, consider the reduction ratio of the allowable current.4. Use heat-resistant cables under high ambient or panel temperatures where normal vinyl cables will rapidlydeteriorate.5. Use cables within the allowable moment of inertia.6. Do not use cables under continuous regenerative state.5.3.1 Cable TypesCable TypesAllowableSymbol NameConductorTemperature°C (°F)PVC Normal vinyl cable −IV 600-V vinyl cable 60 (140)HIVTemperature-resistantvinyl cable75 (167)The following table shows the wire size and allowable current for three cables. Use a cable whose specificationsmeet or are less than the values in the table.• 600-V Heat-resistant Vinyl Cables (HIV)5NominalCrossAWG Size SectionDiametermm 2 (in 2 )20 0.5 (0.00078)- 0.75 (0.00116)18 0.9 (0.00140)16 1.25 (0.00193)ConfigurationNumber ofwires/mm 2(in 2 )19/0.18(0.00028)30/0.18(0.00028)37/0.18(0.00028)50/0.18(0.00028)Note: The values in the table are only for reference.ConductiveResistanceΩ/kmAllowable Current at Ambient TemperatureA30°C (86°F)40°C(104°F)50°C(122°F)39.5 6.6 5.6 4.526.0 8.8 7.0 5.524.4 9.0 7.7 6.015.6 12.0 11.0 8.514 2.0 (0.00310) 7/0.6 (0.00093) 9.53 23 20 1612 3.5 (0.00543) 7/0.8 (0.00124) 5.41 33 29 2410 5.5 (0.00853) 7/1.0 (0.00155) 3.47 43 38 318 8.0 (0.0124) 7/1.2 (0.00186) 2.41 55 49 406 14.0 (0.0217) 7/1.6 (0.00248) 1.35 79 70 574 22.0 (0.0341) 7/2.0 (0.00310) 0.85 91 81 665-45

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