Restrictions For Special Ambient Conditions - Siemens Sinamics PM250 Hardware Installation Manual
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7.5
Restrictions for special ambient conditions
Maximum current at low speeds
NOTICE
Negative impact on the inverter service life.
At low speeds, the inverter can only briefly supply the base load output current.
It is especially important to note that DC voltage operation (continuous operation at 0 Hz) is
not permissible.
Refer to the following diagram for the operating conditions that are possible without having
a negative impact on the inverter service life.
Continuous operation:
Short-time duty
Sporadic short-time duty
Current de-rating depending on the ambient operating temperature
PM250 Power Module
Hardware Installation Manual, 01/2016, A5E36265179B-AA
7.5 Restrictions for special ambient conditions
Operating state that is permissible for the complete operating time.
Operating state that is permissible for less than 2 % of the operating
time.
Operating state that is permissible for less than 1 % of the operating
time.
Technical specifications
61
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