Frequency converter

1. A frequency converter, comprising:

a power electronics part provided with wheels on the lower part thereof;

an installation cabinet for receiving the power electronics part movable on the wheels; and

connectors arranged to the power electronics part and the installation cabinet, a contact being created between the connectors when the power electronics part is installed into the installation cabinet, wherein

the power electronics part is divided at least into a base part provided with wheels and a power stage part arranged onto the base part, the two parts being detachably attached together; and in that

when detached from the power stage part, the base part can be pulled out of the installation cabinet, the power stage part remaining in place in the installation cabinet.

2. A frequency converter according to claim 1 , wherein the base part is provided with a cooling fan arranged thereto.

3. A frequency converter according to claim 1 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet.

4. A frequency converter according to claim 1 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet, the means including surfaces of the installation cabinet and the power stage part that come into contact with each other, at least some of the surfaces being oblique and subjecting the power stage part to an upward force when the power stage part and the base part are pushed together in place into the installation cabinet.

5. A frequency converter according to claim 1 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet, the means including opposite oblique surfaces of the base part and the power stage part, the force being reduced by a lateral movement of the surfaces with respect to each other.

6. A frequency converter according to claim 1 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet, the means including eccentric and rotatable wheel shafts, the rotating of which changes the downward protrusion of the wheels from the base part.

7. A frequency converter according to claim 2 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet.

8. A frequency converter according to claim 2 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet, the means including surfaces of the installation cabinet and the power stage part that come into contact with each other, at least some of the surfaces being oblique and subjecting the power stage part to an upward force when the power stage part and the base part are pushed together in place into the installation cabinet.

9. A frequency converter according to claim 2 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet, the means including opposite oblique surfaces of the base part and the power stage part, the force being reduced by a lateral movement of the surfaces with respect to each other.

10. A frequency converter according to claim 2 , wherein the frequency converter comprises means for reducing the force subjected to the wheels of the base part by the power stage part arranged onto the base part and attached to the installation cabinet, the means including eccentric and rotatable wheel shafts, the rotating of which changes the downward protrusion of the wheels from the base part.