Transformer Rectifier Unit

GOST 15150, GOST 14254, GOST 17516, GOST 16962

Application

Onshore, Offshore and Marine applications

Types

Air Cooled; Oil Cooled

Specification

The rectifier is equipped with redundancy control and power supply unit, providing for the possibility to manually control cathodic protection by redundancy protection potential in absence (e.g. repair) of the main control unit.

Parameter descriptionMeaning
1 Rated output power, kW 0.24-5,0
2 Rated rectified current, А
- in primary mode (U,I)
- in secondary mode (2U, 0,5I)

20-104
31,5-52
3 Rated rectified voltage, V
- in primary mode (U,I)
- in secondary mode (2U, 0,5I)

12-48
96
4 Efficiency in rated mode, minimum, % 75
5 Power factor in rated mode, minimum 0.8
6 Voltage in single-phase supply mains, V 220±44
7 Mains supply rated frequency, Hz 50±3
8 Number of phases 1
9 Range of the rectified current and voltage adjustment, % 0...100
10 Preset value adjustment range -total potential, V -0.5…-3.5
11 Output current ripple, %, maximum 3
12 Number of automatic activations, times 2 to 6
13 Stability of current or potential, % ±2.5

Rectifier description

The rectifier is designed based on a scheme of full-wave rectification and equipped with two triple diodes and one zero diode, with a reducing transformer on the inlet.

For output voltage control, phase-pulse control of triple diodes is used.

The rectifier comprises:

  • А1 – Network unit (БС);
  • А2 – Network rotary panel (ПСП);
  • А3 – Power transformer unit;
  • АЗ-1 – Terminal board (ПК);
  • А4 – Triple diode unit (БТ);
  • А4-1 – Galvanic separation module (МГР);
  • А5 – Front panel (Inner door) (ЛП);
  • А5-1 – Control unit (БУ);
  • А6 – Power and redundancy control unit (БПР);
  • А7 – Protection and automation unit (БЗА);
  • А8 – Free-wheel diode filter capacitor unit (БК);
  • А9 – Terminal unit (КБ)

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