南非采购需求：电动机、感应电动机、IEC电机、交流电动机、三相电动机、单相电动机

I'm currently in the market for strong electric motors, specifically looking for options with power ratings of 20kw and 30kw. My main requirement is that these motors should operate at low speeds, as they will be used for specific applications that demand this characteristic. I would appreciate it if you could provide detailed specifications, including voltage ratings, efficiency levels, and any other relevant information. Additionally, if you have recommendations for models or variations that fit these criteria, please share those as well. I'm interested in understanding the lead times and pricing for bulk orders. Your prompt response would be greatly appreciated, as I'm eager to finalize my sourcing decision soon. Thank you!