Three-phase filter circuit chokes RFDr 7/2.5 – 7/50
Three-phase filter circuit chokesRFDr 7/2.5 – 7/50Three-phase filter circuit chokes for reactive power compensation systemsRated voltage: 3AC 400VChoke factor: 7%Resonance frequency: 189 HzRated frequency: 50 Hz50 Hz current: 1.06 x rated current150 Hz current: 0.04 × rated current250 Hz current: 0.31 x rated current350 Hz current: 0.13 x rated currentThe RFDr series filter circuit chokes comply with national, international, and anticipated future regulations for worldwide use. General:Three-phase filter circuit chokes are used in reactive power compensation systems. Together with the capacitors in the reactive power compensation system, they form a series resonant circuit, thereby achieving defined power system conditions.Three-phase filter circuit chokes with power ratings matched to the load ensure the specified reactive power compensation when connected in series with capacitors of the specified capacitance.Three-phase filter circuit chokes that are not power-matched are rated based on the capacitors used and result in varying reactive power compensation values.With a commonly selected inductance of 7%, the series resonant circuit formed by the filter circuit inductor and compensation capacitors results in a resonance frequency of 189 Hz.Configuration:Open, freestanding design, stationary, for equipment installation and mounting in dry rooms. Connection up to 12.5 kVAr to creepage-current-proof transformer terminals with screw and flat-plug connections: 2.8 x 0.8 mm up to 5 A, 6.3 x 0.8 mm up to 20 A. According to DIN 46249, the 2.8 x 0.8 mm flat plug connection may only be loaded up to 5 A, and the 6.3 x 0.8 mm connection up to 20 A. For capacities from 12.5 kVAr to 25 kVAr, universal terminal blocks with screw connections are used; for capacities of 30 kVAr and above, crimped cable lugs are used. The terminals are protected against contact by the back of the hand and fingers in accordance with UVV (BGV A3).With a temperature switch in the center coil.IP 00, insulation class E, max. ambient temperature 40°C (ta40°C/E)Technical Specifications:Rated voltage: 3AC 400 VChoke factor: 7%Resonance frequency: 189 HzRated frequency: 50 Hz50 Hz current: 1.06 x rated current150 Hz current: 0.04 x rated current250 Hz current: 0.31 x rated current350 Hz current: 0.13 x rated currentFilter circuit chokes with different technical specifications are available upon request.
Delivery time on requestk
Three-Phase Sine Wave Filter RDSF 8 – 1120
Three-phase sine wave filterRDSF 8 – 1120Three-phase sine wave filters for use with variable frequency drivesRated voltage: 3AC 400V to 3AC 690V (higher voltages available upon request)Rated current: up to 1200 A (higher currents available upon request)Frequency: 50 Hz to 60 Hz (higher frequencies available upon request)Pulse width modulation (PWM) frequencies: 1.5 kHz to 8.0 kHzThe RDSF series sine wave filters comply with national, international, and anticipated future regulations for worldwide use. General:Michael Riedel Transformatorenbau GmbH’s RDSF series of sine wave filters (output filters for variable frequency drives) are precisely tailored to the technical requirements of modern drives (VFDs). The use of modern variable frequency drives in motor control results in high harmonic content in the pulsed output voltages. These “harmonic components” place additional strain on the motor insulation, leading to shorter motor service life. The use of RDSF sine wave filters reduces these additional losses even when long motor leads are used, thereby helping to prevent early failures and costly downtime.Technical Specifications:Rated voltages: 3AC 400V to 3AC 690V (higher voltages available upon request)Rated current: up to 1200 A (higher currents available upon request)Frequency: 50 Hz to 60 Hz (higher frequencies available upon request)Pulse width modulation (PWM) frequencies: 1.5 kHz to 8.0 kHzAmbient temperature: ta = 40°C / F, S1/100% duty cycleCooling Types: ANProtection class: IP00 (higher protection classes available upon request)Design: compact, open design for installation in dry roomsAdvantages: Low-noise filters thanks to new core geometry (confirmed by noise level measurements at Aalen University) Reduction of overvoltages on the motor insulation (longer motor operating times) Long motor leads are possible Lower noise levels at the motor
Delivery time on requestk
Single-phase mains double choke RDNDr 2 – 32
Single-phase mains double chokeRDNDr 2 – 32Dual mains chokes for current limitingRated voltage: 400 V ACNominal voltage drop (Uk): 2 x 2% (2 x 2.4% at 60 Hz)Rated frequency: 50 Hz (60 Hz)(Series connection of the partial windings: 4%)(Parallel connection of the partial windings: 1%)The RDNDr series dual mains chokes comply with national, international, and anticipated future regulations for worldwide use. General:The use of dual-line chokes is necessary for current limiting and for suppressing power line disturbances or commutation sags. By distributing the inductance across both power supply lines, a symmetrical connection of the load is achieved. Approximately half the voltage drop occurs across each winding section. Series and parallel connections of the windings allow for additional applications up to twice the rated current and half the voltage drop.Current limiting is preferably set to 25 times the rated current. For this, line chokes with a short-circuit voltage of 4% (2 x 2%) must be used.The dual mains choke is rated according to the load’s rated currentto be selected.Configuration:Open design, stationary, for equipment installation and mounting in dry rooms. Connection to transformers with creepage-current-proof terminals featuring screw terminals. The terminals are protected against contact by the back of the hand and fingers in accordance with UVV (BGV A3).Winding consisting of 2 equivalent winding sections insulated from each other.PE connection as a 6.3 x 0.8 mm flat blade terminal.IP 00, insulation class E, max. ambient temperature 40°C (ta40°C/E)Technical Specifications:Rated voltage: 400 V ACNominal voltage drop (Uk): 2 x 2% (2 x 2.4% at 60 Hz)(Series connection of the partial windings: 4%)(Parallel connection of the partial windings: 1%)Rated frequency: 50 Hz (60 Hz)Dual mains chokes with different technical specifications are available upon request.
Delivery time on requestk
Three-phase line chokes RNDr 2.5 – 500
Three-phase line chokesRNDr 2.5 – 500Three-phase line chokes for current limitingRated voltage: 3AC 400VRated voltage drop (Uk): 4% (4.8% at 60 Hz)Rated frequency: 50 Hz (60 Hz)The RNDr series line reactors comply with national, international, and anticipated future regulations for worldwide use. General:Mains chokes are required for current limiting, suppression of mains disturbances, and commutation sags.Current limiting is preferably set to 25 times the rated current. To achieve this, line chokes with a short-circuit voltage of 4% must be used.The line reactor must be selected based on the load’s rated current.Configuration:Open, upright design, stationary, for equipment installation and mounting in dry rooms, sturdy mounting brackets for securing. Connection to creepage-current-proof transformer terminals with screw terminals. For currents above 50 A, screw-type terminal blocks or cable lugs are used. The terminals are protected against contact by the back of the hand and fingers in accordance with UVV (BGV A3).For terminal connections of 50 A or higher, dimensions b and c change.IP 00, insulation class E, insulation class F for 250 A and above, max. ambient temperature 40°C (ta40°C)Technical Specifications:Rated voltage: 3AC 400 VRated voltage drop (Uk): 4 % (4,8 % at 60 Hz)Rated frequency: 50 Hz (60 Hz)Line chokes with different technical specifications are available upon request
Delivery time on requestk
Three-Phase Motor Filter RDMF 24 – 1120
Three-phase motor filtersRDMF 24 – 1120Three-phase motor filters for use with variable-frequency drivesRated voltage: 3AC 400V to 3AC 690V (higher voltages available upon request)Rated current: up to 1200 A (higher currents available upon request)Frequency: 50 Hz to 60 Hz (higher frequencies available upon request)Pulse width modulation (PWM) frequencies: 1.5 kHz to 8.0 kHzThe RDMF series motor filters comply with national, international, and anticipated future regulations for worldwide use. General:Michael Riedel Transformatorenbau GmbH ’s RDMF motor filters reduce voltage rise rates to less than 500 V/μs. As standard, the motor filters are supplied for a rated voltage of up to 3AC 690 V and a rated current of up to 1200 A. In addition, a unique core geometry significantly reduces noise emissions. The use of RDMF is recommended for motor supply cables up to 250 m in length.Technical Specifications:Rated voltages: 3AC 400V to 3AC 690V (higher voltages available upon request)Rated current: up to 1200 A (higher currents available upon request)Frequency: 50 Hz to 60 Hz (higher frequencies available upon request)Pulse width modulation (PWM) frequencies: 1.5 kHz to 8.0 kHzAmbient temperature: ta = 40°C / F, S1/100% duty cycleCooling Types: ANProtection class: IP00 (higher protection classes available upon request)Design: compact, open design for installation in dry roomsAdvantages: Low-noise filters thanks to new core geometry (confirmed by noise level measurements at Aalen University) Reduction of overvoltages on the motor insulation (longer motor operating times) Long motor leads are possible Lower noise levels at the motor
Delivery time on requestk
Single-phase line chokes RENDr 1 – 32
Single-phase line chokesRENDr 1 – 32Mains chokes for current limitingRated voltage: AC 230 VRated voltage drop (Uk): 4% (4.8% at 60 Hz)Rated frequency: 50 Hz (60 Hz)The RENDr series line chokes comply with national, international, and anticipated future regulations for worldwide use. Mains chokes are required for current limiting, suppression of mains disturbances, and commutation sags.Current limiting is preferably set to 25 times the rated current. To achieve this, line chokes with a short-circuit voltage of 4% must be used.The line reactor must be selected based on the load’s rated current.Configuration:Open design, stationary, for equipment installation and mounting in dry rooms. Connection to transformers with leakage-current-protected terminals featuring screw terminals. The terminals are protected against accidental contact by hand, arm, and finger in accordance with UVV (BGV A3).PE connection as a 6.3 x 0.8 mm flat blade terminal.IP 00, insulation class E, max. ambient temperature 40°C (ta40°C/E)Technical Specifications:Rated voltage: AC 230 VNominal voltage drop (Uk): 4% (4.8% at 60 Hz)Rated frequency: 50 Hz (60 Hz)Line chokes with different technical specifications are available upon request.
Delivery time on requestk
Three-Phase Motor Chokes RDMDr 24 – 1120
Three-phase motor chokesRDMDr 24 – 1120Three-phase motor chokes for operation with variable frequency drivesRated voltage: 3AC 400V to 3AC 690V (higher voltages available upon request)Rated current: up to 1200 A (higher currents available upon request)Frequency: 50 Hz to 60 Hz (higher frequencies available upon request)Pulse width modulation (PWM) frequencies: 1.5 kHz to 8.0 kHzThe RDMDr series motor chokes comply with national, international, and anticipated future regulations for worldwide use. General:As standard, the motor chokes are supplied with a rated voltage of up to 3AC 690V and a rated current of up to 1200A. In addition, a unique core geometry significantly reduces noise emissions.The use of RDMDr is recommended for motor cable runs up to 150 m in length.Technical Specifications:Rated voltages: 3AC 400V to 3AC 690V (higher voltages available upon request)Rated current: up to 1200 A (higher currents available upon request)Frequency: 50 Hz to 60 Hz (higher frequencies available upon request)Pulse width modulation (PWM) frequencies: 1.5 kHz to 8.0 kHzAmbient temperature: ta = 40°C / F, S1/100% duty cycleCooling Types: ANProtection class: IP00 (higher protection classes available upon request)Design: compact, open design for installation in dry roomsAdvantages: Low-noise filters thanks to new core geometry (confirmed by noise level measurements at Aalen University) Reduction of overvoltages on the motor insulation (longer motor operating times) Lower noise levels at the motor
Delivery time on requestk
Do you have specific requirements?
We’ll provide you with personalized advice and work with you to find the right solution for your application.