ABB Busch-Dimmer 6593 U-500 Manual Del Usuario página 36

Important Information ENG 36
Conventional Transformers
When conventional transformers are used, the primary
circuit of each transformer must be protected against
short-circuits in accordance with the manufacturer's
instructions.
Only safety transformers in accordance with DIN VDE
0551 are to be used.
It is not permissible to switch the load via a serial switching
contact, since overcurrents and overvoltages which may
destroy the dimmer can occur upon reconnection.
The secondary open-circuit start-up or operation of
conventional transformers is not permissible.
Always operate conventional transformers with the rated
transformer load.
In order to ensure that the halogen lamps have the same
degree of brightness over the entire correcting range from
bright to dark, transformers with the same secondary
voltage and the same rated power should be used.