Thyro-PX DC — digitally controlled B6C thyristor rectifier, 1000–1800 A DC, up to 550 V AC

Country: USA · Model: Thyro-PX DC

Thyro-PX DC is a controlled thyristor rectifier in the three-phase B6C bridge circuit delivering 1000–1800 A of direct current from a 184–550 V AC network. Its main use is electrolysis, including hydrogen electrolyzers, followed by water treatment, DC heaters and crystal growing.

Circuit: three-phase controlled bridge B6C (6 pulses); parallel operation B12C / B18C (12 and 18 pulses)
Output current: 1000–1800 A DC (air-cooled stack, 35 °C, no overload)
Input voltage: 184–550 V AC (230–500 V −20 %…+10 %); 690 V — in preparation
DC bus voltage: 248–752 V; 650 V at 500 V AC (960 V — in preparation)

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Technical specifications

Circuit	three-phase controlled bridge B6C (6 pulses); parallel operation B12C / B18C (12 and 18 pulses)
Output current	1000–1800 A DC (air-cooled stack, 35 °C, no overload)
Input voltage	184–550 V AC (230–500 V −20 %…+10 %); 690 V — in preparation
DC bus voltage	248–752 V; 650 V at 500 V AC (960 V — in preparation)
Stack power	1215 kW at 500 V AC; up to 4.5 MW in 18-pulse circuit at 690 V (on request)
Stack losses	5.3 kW
Control	current and/or voltage stabilization ±1 %; setpoint 0–100 %; phase-angle control VAR
Cooling	air; water on request
Degree of protection	IP00
Communication	EtherNet/IP, EtherCAT, PROFIBUS, PROFINET, Modbus TCP; micro-USB (Thyro-Tool Pro); RS232 for Thyro-Touch
Display	Thyro-Touch 2.8 inch with recorder and SD card
Frequency	47–63 Hz
Certificates	CE

Specifications are taken from the manufacturer’s technical documentation. Updated 10/31/2026.

Description

The rectifier shares its control board with the Thyro-PX controllers, so setup, communication and diagnostics are the same. The modular 6-pulse air-cooled stack delivers up to 1800 A DC at 35 °C without overload, with water cooling on request. Paralleling stacks in 12- and 18-pulse circuits (B12C, B18C) raises power and lowers DC ripple and mains harmonics, and according to the maker an 18-pulse system on a 690 V input reaches 4.5 MW on request. One stack at 500 V AC is rated 1215 kW with 5.3 kW of losses. Current and/or voltage are held to ±1 % with a 0–100 % setpoint and VAR phase-angle control, backed by digital and analog I/O, expansion modules, a fault memory and energy metering. Setup is done in Thyro-Tool Pro over micro-USB or on the 2.8-inch Thyro-Touch display with process recorder and SD card, and the plant control system is reached via EtherNet/IP, EtherCAT, PROFIBUS, PROFINET or Modbus TCP.

How to choose

The DC bus voltage depends on the input, 650 V at 500 V AC and 248–752 V across versions. The input accepts 230–500 V networks with −20 %…+10 % tolerance at 47–63 Hz, and the 690 V version is still in preparation. Above 1800 A stacks are combined into 12- or 18-pulse circuits, and custom water-cooled layouts are built on Thyro-PX Modular. It is not an AC voltage regulator and does not replace the ROT series (Soviet-era single-phase thyristor voltage regulators), it belongs where thyristor rectifier sets for electrolysis and DC loads used to stand.