Cathtect Engineering (PTY) Ltd manufacture a wide range of Cathodic Protection Equipment and one of our most popular units is our Switchmode Rectifier unit.
The Switchmode Rectifier unit is a newer technology and is significantly more advanced than transformer rectifiers, utilizing high-frequency switching devices resulting in far greater feedback responsiveness, efficiency and service life. Switchmode Rectifiers are known for their quality service & workmanship, providing many extra features that can be uniquely programmed and installed to each client’s specifications. Making this unit one of a kind.
What is a Switchmode Rectifier Unit used for?
Switchmode Rectifier can typically be used for corrosion protection on pipelines, tanks farms & other vulnerable metal Structures, that are at risk of corrosion & where impressed DC current is required.
Optional Extras
- GSM Module (For GSM module add G after your switchmode ordering code)
Optional GSM Modem using RS232 for telemetry. GSM Modem can send instantaneous values of output voltage, current and reference potential measurement, 24 Hour period logged values, 8-bit user defined alarms including phase failure , circuit breaker and fuse rupture. GSM Modem can also relay present control mode and has the ability to change control mode, set up parameters and boundary values. This requires a registered sim card.
- Manual Control (For manual control add M after your switchmode ordering code)
Typical Thermodynamics
Switchmodes, at their optimum efficiency, perform well in small enclosures with in ambient temperatures of up to 158°F (70°C). A heat run was conducted in an enclosure with no ventilation at full load and over a period of 11hours. The in side enclosure temperature was recorded against the ambient temperature at a sampling rate of every 10 seconds.
Starting the heat run at an ambient temperature of 50°F (10°C), the enclosure temperature exponentially increases with time due to its rate of heat dissipation. The rate of heat dissipation tends to a constant temperature value over 10 hours, this maximum cabine temperature is 122°F (50°c) and is uniform throughout the switchmode enclosure. After 10 hours the ambient temperature decreases and then the enclosure temperature decreases accordingly as a result. The thermodynamics of the enclosure Is internally stable and is now being influenced only by external variables.
The Switchmode Rectifier can be fitted into a steel cabinet, concrete bunker or a portable steel cabinet depending on your Cathodic Protection requirements & application, making this unit practical & innovative.
Benefits of the Switchmode Rectifier Unit
- High efficiency of up to 95%
- Significantly lower cost than
- +/- Half the size of a regular Transformer Rectifier
- Single phase & more efficient rectification across the output range
- Light weight design
- 30% less operating temperature
- Output DC ripple is less than 200mV
- Intergrated Remote Monitoring
Features of the Switchmode Rectifier Unit
- Automatic PID output feedback control (Constant Voltage, Constant Current, Constant Reference Potential & Interactive Instant off)
- Heavy duty power factor correction rectification
- Single phase wide range voltage input 90-260VAC
- Input Frequency switching for maximum efficiency of up to 95%
- Digital Metering with backlight for voltage, current & reference potential