Pool Main Pump Motor: Difference between revisions
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* SAB Cable 08610804 8/4 THHN VFD Cable (eBay option). | * SAB Cable 08610804 8/4 THHN VFD Cable (eBay option). | ||
=== Thermal Considerations === | |||
According to the datasheet, the Yaskawa GA50U2042ABA dissipates 391 W @ 42 A. Assuming operation at 37 A, and an approximately linear decrease is power dissipation, up to 344 W of power dissipation is expected. The drive is specified to operate (without de-rating) at up to 50 °C (122 °F). Assuming that the pump house may reach temperatures exceeding 90 °F, thermal rise must be kept to a minimum. Assume that no more than 10 °F of temperature rise is allowed (112 °F ambient). | |||
Using the formula: CFM = (3.17 * P) / dT (where dT is in °F), CFM = 3.17 * 344 W / 10 °F; 109 CFM. | |||
The line reactor dissipates considerably less. Exact dissipation is TBD; conservatively assume 67 W (KDRD24L value @ 48 A = 85 W; 85 W * 38 A / 48 A = 67 W). CFM = 3.17 * 67 W / 10 °F; 21 CFM. | |||
=== Bypass === | === Bypass === | ||