TR Set
Ferrite core based high frequency transformer rectifier (hftr) unit is a high voltage switch mode power supply (smps) unit for electro static precipitator (esp). It supplies a smooth and ripple free high voltage dc into the esp field using the small internal capacitance of the fields. It improves the efficiency of esp than the conventional thyristor controlled tr set. The hftr is powered by a micro-controller based igbt controlled panel. The supply voltage of the panel is 3 phase 415 v 50 / 60 hz. Schematic diagram of the operation as below:
fine particles emissions are much more dangerous to health than the larger ones. Collecting of fine particles below 10 micro meter (pm10 ) in electro-static precipitators has not been very efficient with conventional system. A new high frequency tr set was developed with a pulse duration below 50 micro-second to used it with existing precipitators the current capability had to be in the ka range. It is possible to generate a high charge density in the electrode area, which leads increase charging of the fine particles. Flash over / sparks are mainly avoided due to the short pulse duration. Data can be recorded on a real time precipitation in any esp
Common sensor technologies include:
- Bimetallic mechanical or electrical sensors
- Expanding wax pellets
- Electronic thermistors and semiconductor devices
- Electrical thermocouples
- Thermostatic Radiator Valve (TRV).