Siemens HT-direct User Manual

Commissioning
4.8 Switching on
A5E01083943A AB
Siemens AG Operating Instructions 2.02 1FW4
65
4.8 Switching on
Measures during commissioning
The following measures are normally recommended after installation or inspection work for
standard commissioning of the motors:
● Start the motor without a load; to do this, close the power switch and preferably do not
switch it off prematurely. Switching the motor back off again while it is starting up and still
running at slow speed should be kept to a bare minimum, for example for checking the
direction of rotation or for checking the operation of the motor.
● Check the mechanical operation for noises and vibrations at the bearings and bearing
end shields.
● If the motor is not running smoothly or you hear unusual noises, shut it down.
● If the mechanical operation improves immediately after switching the motor off, then the
cause is magnetic or electrical. If the mechanical operation does not improve immediately
after switching the motor off, then the cause is mechanical: e.g. an imbalance in the
electrical machines or in the working machine, inadequate alignment of the machine set,
operation of the machine with the system resonating (system = motor, base frame,
foundation etc.).
● If the motor runs perfectly in terms of its mechanical operation, switch on any present
cooling devices (external fan, water cooler or similar) and continue to monitor the motor
for a while as it idles.
● If the motor runs perfectly, connect a load. Check that it runs smoothly, and read off and
document the values for voltage, current and power. As far as possible, read off and
document the corresponding values for the driven machine as well.
WARNING
Motor damage or destruction
The vibration values encountered during operation must be satisfied in accordance with
DIN ISO 10816-3, as otherwise the motor could be damaged or destroyed.
● Monitor and log the temperatures of the bearing, windings, etc., until the system reaches
the steady state, in as much as this is possible with the available measuring equipment.
[ID 1181.00]
4.9 Switching off water-cooled motors
Measures during de-energizing
Do not switch off the water-cooling system as soon as the motor is shut down. The cooling
system may only be switched off once the machine has cooled down to avoid "residual local
heat concentration". If the corresponding control action does not take place automatically,
switch on the anti-condensation heating if present.
You must not switch on the anti-condensation heating until at least one hour after the motor
has been switched off. This prevents damage to the winding insulation. [ID 965.01]

Siemens HT-direct Specifications

General

Brand	Siemens
Model	HT-direct
Category	Engine
Language	English