Pulse Rectifier
Pulse Transformer Rectifier PSS-PRU is the equipment used in the cathodic protection system for underground parts of metal structures. This device converts alternating electric current into direct current and supplies the required potential to the protected elements. PSS-PRU type is one of the most popular transformer rectifier options used in modern cathodic protection systems.
The transformer rectifier is made as a block of equipment consisting of a terminal panel, a control system and power modules - depending on the model, their number can vary from one to four. The unit is located inside a protected metal cabinet mounted on a support rack. The equipment is manufactured in accordance with the main technical requirements OTT-75-180.00-KTN-016-19 for modular transformer rectifiers.
Functionality
The transformer rectifiers operate in the following modes:
1) Automatic maintenance of the total potential at a given level in the range of values from minus 3.5 V to minus 0.5 V;
2) Automatic maintenance of the polarization potential at a given level in the range of values from minus 2.0 V to minus 0.5 V;
3) Automatic maintenance of protective current (stabilization of the output current);
4) Automatic stabilization of the output voltage.
The manufacturer has calibrated the measuring circuits of the transformer control unit. The control unit is used as an indicator of the output parameters and operating modes of the transformer rectifier. To control the correctness of maintaining the set value of the output parameter of the transformer rectifier, it is necessary to use certified external specialized measuring devices of the approved type, which are connected to the corresponding transformer terminals.
Pulse Rectifier Modifications
PSS-PRU-E - modular pulse transformer rectifiers with natural air cooling;
PSS-PRU-E-R - modular pulse transformer rectifiers with natural air cooling with 100% redundancy of power modules;
PSS-PRU-EM - modular pulse transformer rectifiers with natural air cooling of modules multichannel;
PSS-PRU-EM-R - modular pulse transformer rectifiers with natural air cooling of modules multichannel with 100% channel redundancy.
Remote Monitoring Used in the Pulse Rectifier
T1 - connection through the "current loop" communication channel with physical signals (analog (4 - 20 mA) and discrete);
Т2 - connection to the transformer via a serial digital interface RS-485, Modbus RTU protocol;
Т3 – connection through GSM/GPRS communication channel version 1 (basic);
T4 - connection through GSM/GPRS communication channel version 2 (with two SIM cards);
Т5 - connection through GSM/GPRS communication channel version 3;
Т6 – connection to a transformer through radio channel (in the UHF range or others).
The combinations of remote monitoring types can be implemented in transformers. In this case, the designation should be carried out as follows:
Т13 – combination of types Т1 and Т3
Т25 – combination of types Т2 and Т5
Т124 – combination of types Т1, Т2 and Т4 etc.
When installing, assembling and operating the transformer rectifiers, it is necessary to follow the requirements of the operating manual for the PSS-PRU-E (M).27.11.50.04RE transformers and PSS-PRU-E (M) .27.11.50 installation manual.
| Name of parameters | PSS-PRU- 2.0-48/96 |
PSS-PRU- 2.0-48/96 |
PSS-PRU- 3.0-48/96 |
PSS-PRU- 4.0-48/96 |
PSS-PRU- 5.0-48/96 |
|---|---|---|---|---|---|
| 1. Nominal output power, kW | 0.1 | 2.0 | 3.0 | 4.0 | 5.0 |
| 2. Nominal output current, А | 20/10 | 40/20 | 63/31.5 | 80/40 | 100/50 |
| 3. Nominal output voltage, V | 48/96 | 48/96 | 48/96 | 48/96 | 48/96 |
| 4. Input voltage, V | 198...242 | 198...242 | 198...242 | 198...242 | 198...242 |
| 5. Nominal supply frequency, Hz | 50±3 | 50±3 | 50±3 | 50±3 | 50±3 |
| 6. Output current ripple, maximum, % | 1 | 1 | 1 | 1 | 1 |
| 7. Output current and voltage adjustment range, % | 2-100 | 2-100 | 2-100 | 2-100 | 2-100 |
| 8. Measuring range of polarization and total potentials, V | -4.5 to +4.5 | -4.5 to +4.5 | -4.5 to +4.5 | -4.5 to +4.5 | -4.5 to +4.5 |
| 9. Total potential setting range, V | -3.5 to -0.5 | -3.5 to -0.5 | -3.5 to -0.5 | -3.5 to -0.5 | -3.5 to -0.5 |
| 10. Polarization potential setting range, V | -2.0 to -0.5 | -2.0 to -0.5 | -2.0 to -0.5 | -2.0 to -0.5 | -2.0 to -0.5 |
| 11. Stability of maintaining output current, output voltage, polarization and total potentials, % , maximum |
±2.5 | ±2.5 | ±2.5 | ±2.5 | ±2.5 |
| 12. Energy conversion efficiency in nominal mode, minimum, % | 90 | 90 | 90 | 90 | 90 |
| 13. Power factor, minimum | 0.95 | 0.95 | 0.95 | 0.95 | 0.95 |
| 14. Operating ambient temperature range, °C | -20 to +60 | -20 to +60 | -20 to +60 | -20 to +60 | -20 to +60 |
| 15. Dimensions, maximum, mm | 1010х590х440 | 1010х590х440 | 1010х590х440 | 1010х590х440 | 1010х590х440 |
| Параметр | Значение |
|---|---|
| Номинальная выходная активная мощность одного канала, кВт | 0.3 |
| Номинальный выходной ток, А, не более | 0.3 |
| Плавное регулирование выходных параметров по напряжению или току от номинального значения, % | от минус 0,5 до минус 3,5 |
| Рабочая температура окружающей среды, °C | от -40 до +50 |
| Степень защиты корпуса | IP65 |
| Габаритные размеры, мм | 200×150×100 |
| Параметр | Значение |
|---|---|
| Номинальная выходная активная мощность одного канала, кВт | 0.3 |
| Номинальный выходной ток, А, не более | 0.3 |
| Плавное регулирование выходных параметров по напряжению или току от номинального значения, % | от минус 0,5 до минус 3,5 |
| Рабочая температура окружающей среды, °C | от -40 до +50 |
| Степень защиты корпуса | IP65 |
| Габаритные размеры, мм | 200×150×100 |
