The block BDR is a typical product and is intended for protection of adjacent underground metal designs against electrochemical corrosion. Block BDR is made in one, two, three and four-channel variants. When parallel connection of four channels, the block can be used as the polarized electrodrainage device with rated current up to 100 А with an opportunity symmetry control of current range channels.

The basic characteristic difference of block BDR, manufacture of SPE "Don", presence built ammeter and switcher for measure current of each available channels, without use of additional measuring devices and adapters.

Block BDR is made in the metal case with a high-quality powder covering and designed for operation in field conditions and in rooms. At the request of the Customer the block can be placed in a pedestal of the CP rectifiers UKZT without case. Also the variant of single-channel block BDR-1 may be made in the case smaller dimensions.

Characteristics of the blocks

The quantity of channels, pieces	1 - 4
The nominal current of one channel, A	25
The total resistance of restrictive resistors of a canal, Ohm	0,24
The resistance of one restrictive resistor, Ohm	0,04
Mass, no more, kg	20
Dimensions, mm (WxHxL)	380х540х220