Motorized brush variable autotransformers
Power up to 500 KVA
Braga has many years of experience in the production of motorized brush variables with power and voltage values specified by the Customer.
They find application in all situations where a continuous and ‘stepless’ variation of the supply voltage of equipment is necessary.
They are electrically equivalent to autotransformers, therefore galvanic separation between primary and secondary is not contemplated.
They are supplied complete with motorization suitable for moving the graphite brushes that ensure electrical contact on the columns.
It is the Customer’s responsibility to create the motor drive circuit.
Brush variables must be incorporated in a cabinet to be installed in accordance with standards.
| Technical characteristics | Value |
|---|---|
| Reference standards | IEC 61558-1 , IEC 61558-2-13 |
| Thermal insulation class | H |
| Protection degree | IP00 |
| Suitable for installation up to | IP23 (IP54 on request) |
| Frequency | 50-60Hz |
| Connections | Terminal block |
| Terminals | Non-flammable Nylon |
