3 phase metal plate rectifier

There are 30 plates measuring 100 x 63mm

The reference code is DB150/180-13WT

Therefore it appears to be:

Rated AC voltage is 150V

Nominal DC voltage is 180V

Rated direct current is 13A

This has been in storage for years and never used. This is difficult to photograph which shows dust and dirt between the plates. There is no visible damage, particularly rust, on the unit.

I suspect this was used on an older Otis lift, which used a 3 phase transformer, down to 110VAC 3 phase, then into the rectifier for 110VDC control voltage.

This is now a very rare unit.