Rectifier for graphitization furnace high current DC power supply 100kA 50V Graphitizing Introduction Graphitizing furnaces is connected with high current DC power supply, by means of the heating (2600°C-3300°C) produced by the DC current passing through to the furnace, baking carbon to convert...
Rectifier for graphitization furnace high current DC power supply 100kA 50V
Graphitizing Introduction
Graphitizing furnaces is connected with high current DC power supply, by means of the heating (2600°C-3300°C) produced by the DC current passing through to the furnace, baking carbon to convert to graphite.
The graphitizing furance is also called Acheson furnace.
Green Power provides the high current rectifier for graphitizing furnace.
Graphitizing Transformer Rectifier Brief Introduction
The rectifier transformer have high voltage 3 phase input, the output of transformer is used as input to the rectifier through flexible bus bars to produce 0-50V DC on rectifier output terminal and maintain 100kA DC current across the load.
The transformer is OFAF cooled and rectifier water cooled.
Both transformer and rectifier is mounted on a self powered trolley which can move on a metallic rail track, which can be moved on rails from a furnace to the other during heat reduction.
Graphitizing Transformer Rectifier System Composition
◆ High voltage switchgear
◆ Rectifier transformer
◆ Rectifier
◆ Control panel
◆ DC output measuring device
◆ Heat exchanger
Green Power Rectifier Advantages
◆ Latest Rectifier Technology
◆ Design to all types of environments
◆ Remote monitoring via PLC modem
◆ Combined with the application process and technical parameters, optimize main circuit design, ferromagnetic calculation and structure design to effectively reduce EMI, loss and improve efficiency
◆ Adaptive filtering of synchronous signal
◆ Optical fiber trigger, small optical delay, good synchronization effect, strong anti-interference ability
◆ Self developed DSP digital control, fast response, high control accuracy, high reliability, easy for DCS networking
◆ High reliability, verified by export application
◆ Multiple parallel thyristors are considered in the structural design, with good current sharing effect
◆ Anti corrosion treatment
◆ International level process standard
◆ Transformer On Load Tap Changer available
◆ Harmonics studies available
◆ Based on specifications we can conform to IEC, IEEE, CE, UL, CSA, etc...
◆ High Efficiency units with low operating temperatures
◆ Stainless steel water piping
◆ Thyristor N+1 redudancy
◆ Multi-pulse configurations available
◆ Grounding insulation detection available
◆ Design to local environment, altitude and cooling conditions with all cooling system types available
◆ Air cooling rectifier availalbe in minus Celsius degree temperature area to avoid water freezing, have experience
◆ 7:00-23:00 Beijing Time in service (UTC+8）
Transformer Rectifier Main Circuit
◆ The system adopts 12 pulse double star with IPT(inter phase transformer) in-phase counter parallel technology circuit, which has below advantage.
Double star with in-phase counter parallel technology, primary with voltage regulation.
In-phase counter parallel technology advantage:
Adopt in-phase counter parallel technology could reduce eddy current loss and the interference caused by the strong magnetic field, so that eddy currents do not exist, like below figure shown.
Transformer Rectifier Main Parameters
No. | Parameter name | Parameter |
1 | Input voltage | 10kV±10% AC, 50Hz |
2 | Rated output voltage | 50V DC |
3 | Rated output current | 100kA DC |
4 | Output current regulation range | 0~100% |
5 | Transformer capacity | 7500kVA |
6 | On load tap changer steps | 17 steps |
7 | Transformer cooling mode | OFAF, oil immersed forced air cooling for better cooling considering the big power |
8 | Cooling mode of rectifier | Water cooling |
9 | Output current control accuracy | Better than ±1% |
10 | Power factor at rated output voltage | 0.9 |
11 | Equivalent rectifier pulse no. | 12 pulse |
12 | Whole system efficiency at rated load | ≥95.8@rated output |
13 | THDi | ≤12% |
14 | Overload ability | 60s |
15 | Control mode | Constant current or constant voltage |
16 | Protections | AC input fault protection, output over voltage protection, overload/overcurrent protection, Thyristor R-C absorption protection, arm Thyristor over heat protection, fast-acting fuse protection, insulation protection, transient power-off self recovery, cooling water pressure protection etc. protections |
17 | Load grade | type Ⅰ, full load long time running |
18 | Local control HMI | Touch panel |
19 | Remote control | RS485 communication interface |
20 | Thyristor current equivalent ratio | ≥0.9 |
21 | Current equivalent ratio between bridge arms | ≥0.9 |
22 | IP rating | IP44 |
Green Power factory
Contact us
Alice Lee
Email: alice@bjgreenpower.com
Mobile/whatsapp: +86 13810151476
Wechat: 65044167
Looking for transformer rectifier for graphitization furnace high current dc power supply 100ka 50v? Green Power Technology is one of the professional manufacturers and suppliers. We have been dedicated to this field for over 20 years and already exported products to India, USA, Germany, etc. Equipped with a productive factory, we warmly welcome you to buy our high quality products made in China at competitive price or try our customized service.