Natural Air Convection Transformer Rectifier

The single-phase AC transformer rectifier with natural air cooling PSS-V-OPE is designed for cathodic protection of underground metal structures (gas pipelines, oil pipelines, utilities, etc.) from electrochemical corrosion.

The PSS-PSS-V-OPE rectifier, in addition to its main purpose, can be used as a DC power source in various processes with the required large variability of the output parameters of the rectifier, as well as for the implementation of auto-regulation schemes. For example, battery charging, galvanic processes, control (power supply) of DC motors, etc.

The automatic rectifier PSS-PSS-V-OPE can work both independently and as part of protective complexes with remote control (remote monitoring).

Construction Features

The rectifier is made in a rectangular metal case with a lockable door. The lock is protected from dust and water penetration.
The block design of the rectifier facilitates maintenance and allows you to repair individual units in stationary conditions. For diagnostics and repair, convenient access to the rectifier elements is provided, due to the use of rotary (folding) circuit boards and panels in the design.
A distinctive feature of the rectifier is the presence of a backup control and power supply unit (BRP), which allows in the absence of a control unit (for example, repair, etc.) in manual control mode to protect the object with a backup protective potential.

Designs

PSS-V-OPE with analog control unit
PSS-V-OPE-D with digital control unit
PSS-V-OPE-D provides a higher informative indicator of the operating modes of the transformer rectifier control unit and an intuitive setup menu. When ordering equipment with the function of recording to an SD card, it becomes possible to record the transformer rectifier parameters (input voltage, output voltage, output current, protective and polarization potentials), unauthorized access signals, emergency situations and other signals to a removable SD memory card with a capacity of up to 2 GB. The duration of continuous data recording on the card is at least 10 years.

Operation Modes

1) Automatic maintenance of the measured potential difference at a given level in the range of values from minus 0.5V to minus 3.5 V;
2) Automatic maintenance of the protective current (stabilization of the output current);
3) In manual setting of output voltage (current);
4) Uncontrolled rectifier;
5) Adjustable rectifier;
6) Adjustable output current (voltage) stabilizer;
7) Cyclic interruption of the load current, for measuring the polarization potential, by signals from the telemechanics system or from the built-in timer.

Remote Monitoring

The rectifiers can be connected to various remote control and monitoring systems:

• The values of the measured potential difference, output voltage, output current
• Cumulative accounting of electricity consumed
• Remote installation of the protective potential (in the automatic mode of maintaining the protective potential)
• Remote installation of the protective current (in the automatic mode of stabilization of the protective current)
• Remote setting of the output voltage of the rectifier (in manual mode - setting the output voltage)
• Unauthorized access inside the rectifier

The transformer rectifier can be supplied complete with remote monitoring:
- PSS-TRUSignal-2.M1 – control is carried out via the "current loop" interface 4-20 mA;
- PSS-TRUSignal-2.M2 – control is carried out via the RS-485 interface "ModBus RTU";
- PSS-TRUSignal-2.M3 – control is carried out via the interface "current loop" or RS-485;
- PSS-TRUSignal-2. GSM (PSS-TRUSignal-GSM-GPRS-RS-485) – control is carried out via GSM/GPRS channel.