Description :-Transformer-Rectifier (T/R) sets supply specified DC Voltage and current to the field of electrostatic precipitators. Shyamrai makes both standard and custom T/R sets, and both the set very standard for quality and adaptability in retrofit and new applications for ESPs. Shyamrai make T/R sets and associated control panel and Micro-processor based controller meet all electrical requirements for all types of ESPs.

The T/R Set Product Description

The T/R set consists of a transformer, an in built current-limiting reactor (CLR), High voltage rectifiers, High voltage resistance for signal feed back to controller, R.F. Choke and switches - all contained in an oil- filled tank that is completely sealed and suitably painted for outdoor use. Standard semi-outdoor bushing are supplied on these units and are suitable for outdoor use when enclosed in a bus duct to protect them from the elements.

Available any ratings are from 40 kV DC 100mA to 120kV DC 2000mA.

• Main transformer: This is a high-voltage, step-up transformer designed to convert low-voltage input into the high voltage required for ESP operation. The transformer is located on the bottom of the tank. Primary winding is designed to match the type of controller being used; secondary voltages and currents are set to meet load requirements. The transformers unique design helps prolong its life by distributing the electrical and mechanical stresses incurred in operating the ESP.
• Rectifier: To ensure the optimum reliability, our minimum rating for high-voltage rectifiers are 1.5 times the PIV of the T/R maximum peak KV. A full wave rectifier bridge is connected across the transformer secondary. The negative polarity i.e. DC output from the rectifiers is connected to a H.F Choke in such a way that the bridge is easily removable and replaceable from the top of the T/R set.
• Transformer-Rectifier Tank: T/R tanks are rectangular in shape. Lugs and supports are available to aid in lifting by crane or forklift. Powder coating or suitable outdoor paint is standard, but can meet other individual specifications on request.
• Current limiting reactor (CLR): Because of sparking and consequent short circuiting during ESP operation, current must be limited to protect the T/R set. When a Silicon Controlled Rectifier (SCR) controller is used as the voltage regulating device, it must be protected for adverse short-circuit conditions. Besides improving waveform and waveform factor, the CLR protects both the T/R set and SCR controller as follows:
  1. By limiting current to SCR
  2. By limiting peak current to the T/R set during precipitator sparking.

The CLR is designed so that short-circuit current is limited to a value specified by the user or ESP manufacturer (usually a maximum of three times rated current). The CLR is connected in series to the T/R set primary.

Description :-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.

1. Input Supply : 3 Phase 415 V AC 50 / 60Hz.
2. Input Current : 60 Amps (Max.)
3. Power Factor : 0.98 to 1.0
4. Output Voltage: 50, 000 Volts DC (Max.)
5. Output Current: 0.5 Amps (Max.)
6. Operating freq. : 20KHz. (Max.)
7. Efficiency : >95%
8. Output Power : 25KVA

Description :-Transformer-Rectifier (T/R) sets supply specified DC Voltage and current to the field of electrostatic precipitators. Shyamrai makes both standard and custom T/R sets, and both the set very standard for quality and adaptability in retrofit and new applications for ESPs. Shyamrai make T/R sets and associated control panel and Micro-processor based controller meet all electrical requirements for all types of ESPs.

The T/R Set Product Description

The T/R set consists of a transformer, an in built current-limiting reactor (CLR), High voltage rectifiers, High voltage resistance for signal feed back to controller, R.F. Choke and switches - all contained in an oil- filled tank that is completely sealed and suitably painted for outdoor use. Standard semi-outdoor bushing are supplied on these units and are suitable for outdoor use when enclosed in a bus duct to protect them from the elements.

Available any ratings are from 40 kV DC 100mA to 120kV DC 2000mA.

• Main transformer: This is a high-voltage, step-up transformer designed to convert low-voltage input into the high voltage required for ESP operation. The transformer is located on the bottom of the tank. Primary winding is designed to match the type of controller being used; secondary voltages and currents are set to meet load requirements. The transformers unique design helps prolong its life by distributing the electrical and mechanical stresses incurred in operating the ESP.
• Rectifier: To ensure the optimum reliability, our minimum rating for high-voltage rectifiers are 1.5 times the PIV of the T/R maximum peak KV. A full wave rectifier bridge is connected across the transformer secondary. The negative polarity i.e. DC output from the rectifiers is connected to a H.F Choke in such a way that the bridge is easily removable and replaceable from the top of the T/R set.
• Transformer-Rectifier Tank: T/R tanks are rectangular in shape. Lugs and supports are available to aid in lifting by crane or forklift. Powder coating or suitable outdoor paint is standard, but can meet other individual specifications on request.
• Current limiting reactor (CLR): Because of sparking and consequent short circuiting during ESP operation, current must be limited to protect the T/R set. When a Silicon Controlled Rectifier (SCR) controller is used as the voltage regulating device, it must be protected for adverse short-circuit conditions. Besides improving waveform and waveform factor, the CLR protects both the T/R set and SCR controller as follows:
  1. By limiting current to SCR
  2. By limiting peak current to the T/R set during precipitator sparking.

The CLR is designed so that short-circuit current is limited to a value specified by the user or ESP manufacturer (usually a maximum of three times rated current). The CLR is connected in series to the T/R set primary.

Description :-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.

1. Input Supply : 3 Phase 415 V AC 50 / 60Hz.
2. Input Current : 60 Amps (Max.)
3. Power Factor : 0.98 to 1.0
4. Output Voltage: 50, 000 Volts DC (Max.)
5. Output Current: 0.5 Amps (Max.)
6. Operating freq. : 20KHz. (Max.)
7. Efficiency : >95%
8. Output Power : 25KVA