Preparations for use
4.9 Complying with speed-torque curve
Complying with speed-torque curve
Exceeding the temperature class
If the speed-torque curve is not followed, the temperature class may be exceeded. An
explosion can occur. This can result in death, serious injury or material damage.
● Comply with the speed-torque curve.
● Observe the data on the extra rating plate on the motor.
Phase synchronization during supply system switching
Supply system switching
Damage to the machine may be caused when switching to another supply system with
● The phasing must be synchronized during switching. Use appropriate means to
Observe the minimum dimension for the air inlet at the machine site:
Voltage and frequency fluctuations during line operation
If nothing else is stamped on the nameplate, then the permissible voltage fluctuation is ±5 %
and the permissible frequency fluctuation is ±2 %, corresponding to range A in
IEC / EN 60034‑1. Permissible fluctuations that go beyond this are specified on the nameplate,
e.g. voltage fluctuation of ±10 % corresponding to range B in IEC / EN 60034‑1.
The following applies: Under practical operating conditions a machine may sometimes have
to be operated outside the limits of Range A. Exceptions of this sort should be limited with
regard to the values that arise, how often and for how long they occur. Where possible and
synchronize the phasing.
Minimum dimensions for air intake
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017