| Electrical connection | |
|---|---|
|
|
| Three-phase motor | 400V |
| AC motor | 230 V |
|
|
| Three-phase motor | 400V |
| AC motor | 230 V |
Other voltages and frequencies are available at short notice.
Axial fan & centrifugal fan connection with full motor protection technology
The connection of a Kaiser axial fan or centrifugal fan with motor protection switch and contactor
A motor circuit breaker is used to protect electric motors and is installed upstream of them in the circuit. There are different types:
1. the motor-protective circuit-breaker with thermal release (bimetal)
2. the motor-protective circuit-breaker with thermal and electromagnetic release, which also provides protection against a short circuit.
3. the power contactor, usually in conjunction with an auxiliary contactor
4. the auxiliary contactor (motor protection relay) for the thermal contact sensor TK in the motor as a supplement to the motor protection switch.
A combination of all 4 switches above.
In the article we show what options are available, including examples.
Installation and air flow direction
Installation of the axial fans and radial (centrifugal) fansThe installation of the axial fans is possible in any position.
In the case of big fluctuations in the temperature condensation can form in the motor. In order to remove this, the motors are equipped with condensation water holes on both bearing plates. In order to be installed correctly, the installation should be indicated when ordering.
If no installation is specified at the time of ordering, the system is delivered as standard in installation position 1.
Air Transport Direction (Air Flow Direction)
Operation with frequency converters
When using frequency converters, it is important to ensure that these have a high-quality sinus-filter (sine-wave filter) connected at the output. With reference to the European standard for rotating electrical machines, DIN IEC / TS 60034-17, the increased stress on the motor winding system by voltage spikes and the risk of bearing currents due to capacitive coupled voltage, must be prevented by a suitable (allpolar) sinus-filter.
Turbulence effects with axial fans
The flow in an axial fan can be divided into two areas from the point of view of flow losses, the main or primary flow in the area of the center of the fan blade and the edge or secondary flows in the area of the hub and the fan ring (housing boundary).