Diode-resistor unit BDR-M2

Diode-resistor unit BDR-M2

Purpose

Enterprises of the oil, gas, chemical, energy and other industrial complexes. Municipal engineering enterprises. Different organizations operating the equipment for the cathode protection of the underground metal structures against electrochemical corrosion.

Features

• Extended list of units.
• Overall electrical resistance of channels is increased up to 0.4 Ohm.
• Number of control stages in the channels increased up to 20.
• Protection current setting in each channel is made by one closing switch.
• Opportunity of parallel connection of channels of multi-channel units for increasing of the total rated and peak current.
• Opportunity of series connection of channels of multi-channel units for increasing of the total electrical resistance of the channels. Opportunity to create non-polarized channels and channels of current reverse conductance.
• Efficient protection against atmospheric (lightning) overvoltages.
• Presence of unit forms (I, TI, AI) with a built-in amperometer for direct measuring of protective currents flowing through the channels to the structures.
• Opportunity of connection to the telemechanics systems (T, TI form) for measuring of:
  • protective currents flowing through the channels to the structures;
  • protection potentials at the structures.
• Presence of unit forms (A, AI) with the channels of “forward” conductance for use, for example:
  • as polarized drains;
  • for connection of multiple anode ground electrodes and rectification of currents from separate elements.
• Opportunity to install units on:
  • flat horizontal foundation;
  • flat vertical foundation;
  • test points;
  • power transmission tower.
• Long-life performance: up to 20 years.

Operation conditions

• Operation in the open air and under cover
• Stable operation in the climatic zones in the wide range of the environment temperatures from -45?C to +45?C.