Running a 300 Amp DC converter in a chlorate cell is not advisable due to the rapid corrosion of electrodes and the excessive production of chlorine gas. While higher current can accelerate chlorate production, it may lead to fewer chlorate crystals and potential damage to the system, including boiling away water and ruining electrodes. It is recommended to maintain a reasonable current level and consider optimal temperature and current density for effective production, as faster isn't always better in this process.