The Automatic Failover Switch BAR is created to automatic switching of the main cathodic protection device (UKZ) to the reserve, in the event of a lack of supply voltage of the main UKZ or its out of range, as well as in case of failure of the main UKZ (in the absence of output voltage).
The Automatic Redundancy Unit (BAR) is intended for automatic switching of the main cathodic protection unit (UKZ) to the backup one, in the event of a lack of supply voltage of the main UKZ or its out of range, as well as in case of failure of the main UKZ (in the absence of output voltage). The Automatic Redundancy Units comply with GOST R 51164-98, GOST 9.6 02-89, TU 3435-042-73892839-2012.
The units manufactured in climatic version M1 (moderate) are designed for outdoor use, units manufactured in climatic version M2 are designed for operation under a canopy or indoors. They provide reliable stable operation when exposed to external climatic and atmospheric factors:
- relative humidity (at 25° С) up to 98%;
- atmosphere type I, II;
- atmospheric pressure 86.6 - 106.7 kPa (650 to 800 mm Mercury).
Equipment characteristics and features
The BAR is constructively made according to the building-block concept. The units are placed inside a metal cabinet, on the front side of which a door with two locks is installed. The degree of protection of the cabinet is IP34 (according to GOST 14254-96). The BAR can operate in both automatic and manual modes. The main operating mode is automatic. The manual mode is used for servicing the UKZ and setting the required output parameters in them. Natural air-cooling. Weight does not exceed 25 kg.
The principle of operation of the BAR is based on the continuous analysis by the control unit of the input voltage parameters of the main and backup feeders, as well as the output voltages of the operating UKZ and control of solid-state relays (depending on the values of the above parameters), through which power is supplied to the main and backup UKZ.
- switching unit;
- control unit (CU);
- solid-sate relay unit;
- power diode unit.
The BAR provides protection against lightning overvoltages from the side of the mains voltage inputs of the main and standby feeders, as well as from the side of the input of the total and polarization potential measurement circuits.
The BAR is equipped with light signaling:
- the presence of supply voltage from the main and standby feeder;
- on availability of the output voltage of the main and standby UKZ.
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PSS Corporation. Cathodic protection equipment.
