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9/6/2022 9:50 AM | |
Joined: 10/11/2006 Last visit: 8/12/2024 Posts: 5889 Rating: (802)
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Hello, I think you chose a self-ventilated 1LE1. With the self-ventilated motor, the fan sits on the rotor and also slows down at lower speeds, thus reducing the cooling of the motor. Therefore, the motor characteristic curve of the self-ventilated motor is reduced at low speeds in contrast to the externally ventilated motor. When you change in SIZER the cooling method of the motor to "force-ventilated" (option F70), you get the motor characteristic without derating at low speed. Please look at catalogue D81.1, page 1/80, too.
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With best regards, |
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