Rectifiers in low-floor design
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Sub-contract plating workshops, Chrome processes, Special Applications
The enduring oil-cooled variable ratio transformer rectifiers give the best protection possible without the need of any external cooling source. All critical power components are completely submerged in oil, so optimum cooling and protection from the environment is guaranteed. The adjustment of the rectifier can be carried out by means of a motor-driven variable ratio transformer or electronically via analog signals for constant voltage and current control. The rectifiers offer a constant ripple of < 5 %.
Our Variable Ratio Transformer Technology is also available in oil-water-cooling.
Block diagram / Functional Description:
Capacity adjustement is achieved on the primary side. Using fuse elements and a main contactor ensures safe mains separation. Galvanic mains separation is achieved by the main transformer. A 6-pulse rectification meets the requirements which are relevant to the process. The main components (variable ratio transformer, main transformer, diode bridge) are installed in one steel tank.
The oil cooled Variable Ratio Transformer Technology is preferably used for low and medium output ranges (1000 A - ≥ 15000 A)
Easy to handle and perfect for harsh everyday industrial conditions Variable Ratio Transformer Rectifiers are highly regarded worldwide.
|Mains Voltage:||3 x 400 V, 50 Hz + N + PE|
|Output Current||> 1000 A - 15000 A|
|Output Voltage:||6 V - 150 V|
|Ripple:||approx. 5 % full range|
|Duty Factor:||100 % (24/7)|
|Efficiency:||80 % - 93 %|
|Ambient Temperature:||+ 35 °C, > 40 °C (Option)|
|Protection Grade:||IP 54 tank / IP 23 cover|
Variable Ratio Transformer Rectifiers in oil cooling are available in the following tank sizes:
(Dimensions in mm)
Digital high/low operation commands
Analog voltage values 0-10 VDC
Option: 4..20 mA, Profibus DP, PROFINET, etc.