FlexKraft™ Air-Cooled Rectifiers provide premium DC power and performance for demanding industrial environments. Designed for 24/7 continuous operation under harsh conditions, the rectifiers include unique features such as Single and Multiple Outputs wth Optional Polarity Reversal, upgradeable power, self-serviceability and fail-safe operation.
With its modular design and an output ranging from 0-120V and 0-30,000A and a multitude of Control Options, we offer the flexibility to provide a best-fit solution to meet your most demanding process and application requirements.
The FlexKraft™ will help your business save money and become more competitive by reducing energy consumption and maintenance cost while increasing output and improving product quality. It’s not just another black box — it’s there to power your success.
With more than 80 years of experience, we won't let you down!
Click: FlexKraft Video Demo - Removal and Replacement of a Module.
| Items |
 FKA-1M FlexKraft Air-Cooled DC Rectifier (1 Module) (12V-600A, 15V-500A, 24V-300A, 30V-250A) |
 FKA-2M FlexKraft Air-Cooled DC Rectifier (2 Module) (12V-1200A, 15V-1000A, 24V-600A, 30V-500A, 48V-300A, 60V-250A) |
 FKA-3M FlexKraft Air-Cooled DC Rectifier (3 Module) (12V-1800, 15V-1500A, 24V-900A, 30V-750A) |
 FKA-4M FlexKraft Air-Cooled DC Rectifier (4 Module) (12V-2400A, 15V-2000A, 24V-1200A, 30V-1000A, 48V-600A, 60V-500A) |
 FKA-5M FlexKraft Air-Cooled DC Rectifier (5 Module) (12V-3000A, 15V-2500A, 24V-1500A, 30V-1250A) |
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| Alternating Current (AC) Supply Voltage | 480 VAC /- 10%, 60 Hz, 3 Phase | 480 VAC +/- 10%, 60 Hz, 3 Phase | 480 VAC +/- 10%, 60 Hz, 3 Phase | 480 VAC +/- 10%, 60 Hz, 3 Phase | 480 VAC +/- 10%, 60 Hz, 3 Phase | |||||
| Electromagnetic Compatibility (EMC) Conformity | According to IEC 61000-6-4, Emissions, and IEC 61000-6-2, Immunity | |||||||||
| Low Voltage Directive (LVD) Conformity | According to IEC 50178 | |||||||||
| Protection Class | IP 32 | |||||||||
| Power Factor at Rated Load | >0.93 | |||||||||
| Typical Efficiency at Rated Output | 0.90 | |||||||||
| Maximum Ambient Temperature | 104 ºF | |||||||||
| Derated Operation Ambient Temperature | up to 122 ºF | |||||||||
| Cooling | Forced Air-Cooling | |||||||||
| Maximum Relative Humidity | 85 % | |||||||||
| Control Precision (Voltage/Current) | <+/- 1 % | |||||||||
| Direct Current (DC) Ripple | < 1% of rated output current at constant current mode in the entire range of regulation. | |||||||||
| Regulation Range | Stepless at constant voltage or current 0-100 % | |||||||||
| Duty Ratio | Designed for continuous operation at rated load up to 3300 ft altitude. | |||||||||
| Protection | Module Failure Open circuit Over-current Over-temperature Over-voltage Short circuit | |||||||||
| Direct Current (DC) Output Voltage | 0 to 12 V 0 to 15 V 0 to 24 V 0 to 30 V | 0 to 12 V 0 to 15 V 0 to 24 V 0 to 30 V 0 to 48 V 0 to 60 V | 0 to 12 V 0 to 15 V 0 to 24 V 0 to 30 V | 0 to 12 V 0 to 15 V 0 to 24 V 0 to 30 V 0 to 48 V 0 to 60 V | 0 to 12 V 0 to 15 V 0 to 24 V 0 to 30 V | |||||
| Number of Power Modules | 1 | 2 | 3 | 4 | 5 | |||||
| Output Current at 0 to 12 Volt Direct Current (DC) Voltage | 600 A | 1200 A | 1800 A | 2400 A | 3000 A | |||||
| Output Current at 0 to 12 Volt Direct Current (DC) Voltage (Dual Power Supply) | 2 x 300 A | 2 x 600 A | 2 x 900 A | 2 x 1200 A | 2 x 1500 A | |||||
| Output Current at 0 to 15 Volt Direct Current (DC) Voltage | 500 A | 1000 A | 1500 A | 2000 A | 2500 A | |||||
| Output Current at 0 to 15 Volt Direct Current (DC) Voltage (Dual Power Supply) | 2 x 250 A | 2 x 500 A | 2 x 750 A | 2 x 1000 A | 2 x 1250 A | |||||
| Output Current at 0 to 24 Volt Direct Current (DC) Voltage | 300 A | 600 A | 900 A | 1200 A | 1500 A | |||||
| Output Current at 0 to 30 Volt Direct Current (DC) Voltage | 250 A | 500 A | 750 A | 1000 A | 1250 A | |||||
| Output Current at 0 to 48 Volt Direct Current (DC) Voltage | 300 A | 600 A | ||||||||
| Output Current at 0 to 60 Volt Direct Current (DC) Voltage | 250 A | 500 A | ||||||||
| Height | 18 " | 23 " | 29 " | 34 " | 40 " | |||||
| Weight | 108 lbs | 168 lbs | 224 lbs | 243 lbs | 352 lbs | |||||
| Footprint of Cabinet Width Including Busbars on the Rear Side | 20 in | |||||||||
| Footprint of Cabinet Depth Including Busbars on the Rear Side | 24 in | |||||||||
| Upgradable Output Power | If your future power requirements change, don't buy a new rectifier, simply add more power modules to your FlexKraft or reconfigure your existing FlexKraft to meet your updated requirements. | |||||||||
| Serviceable | Simple design, easy accessibility, and self-diagnosing power modules makes the FlexKraft easy to trouble-shoot, service and repair. | |||||||||
| Space-Saving | Compact design and capability to stack several units in one tower makes efficient use of shop floor space. | |||||||||
| High Power Factor | >0.93 at rated load means no reative power penalty on your electricity bill and less strain on your local AC supply. | |||||||||
| Ripple | Less than 2% of rated output current in the entire range of regulation. Typical value at nominal output current is less than 0.2%. This standard feature is perfect for ripple sensitive processes. | |||||||||
| Modular Design | Any combination of power modules up to 120 VDC or 30,000 A can be supplied. | |||||||||
| Options | *Analogue interface with four inputs and four outputs galvanically isolated. Control and status signals 0-10 VDC or 0/4-20 mA. *Analogue/Digital interface. Two controls, and two status signals 0-10 VDC and two controls and two status signals 24 VDC. *Digital interface with four inputs and four outputs. Control signals 24 VDC. Status signals via voltage free relay contacts; contact data 24 VDC or 24 VAC. Standard configuration: On/Off, Block/Run, Power On and Alarm. *Electrically controlled AC breaker. *External reference shunt, 60 mV. *Polarity Reversal. *Raise/Lower function. *Remote control options: ControlKraft Touch or ControlKraft Digital *RS-232C interface control of one dual power supply. *Standard configuration: Iset, Uset, lact and Uact: 0-10 VDC. On/Off, Block/Run, Power On and Alarm as digital signals: 24 VDC. *Standard configuration: lset, Uset, lact and Uact: 4-20 mA | *Analogue interface with four inputs and four outputs galvanically isolated. Control and status signals 0-10 VDC or 0/4-20 mA. *Analogue/Digital interface. Two controls, and two status signals 0-10 VDC and two controls and two status signals 24 VDC. *Digital interface with four inputs and four outputs. Control signals 24 VDC. Status signals via voltage free relay contacts; contact data 24 VDC or 24 VAC. Standard configuration: On/Off, Block/Run, Power On and Alarm. *Electrically controlled AC breaker. *External reference shunt, 60 mV. *Polarity Reversal. *Raise/Lower function. *Remote control options: ControlKraft Touch or ControlKraft Digital *RS-232C interface control of one dual power supply. *Standard configuration: Iset, Uset, lact and Uact: 0-10 VDC. On/Off, Block/Run, Power On and Alarm as digital signals: 24 VDC. *Standard configuration: lset, Uset, lact and Uact: 4-20 mA | *Analogue interface with four inputs and four outputs galvanically isolated. Control and status signals 0-10 VDC or 0/4-20 mA. *Analogue/Digital interface. Two controls, and two status signals 0-10 VDC and two controls and two status signals 24 VDC. *Digital interface with four inputs and four outputs. Control signals 24 VDC. Status signals via voltage free relay contacts; contact data 24 VDC or 24 VAC. Standard configuration: On/Off, Block/Run, Power On and Alarm. *Electrically controlled AC breaker. *External reference shunt, 60 mV. *Polarity Reversal. *Raise/Lower function. *Remote control options: ControlKraft Touch or ControlKraft Digital *RS-232C interface for control of one power supply. *Standard configuration: Iset, Uset, lact and Uact: 0-10 VDC. On/Off, Block/Run, Power On and Alarm as digital signals: 24 VDC. *Standard configuration: lset, Uset, lact and Uact: 4-20 mA | *Analogue interface with four inputs and four outputs galvanically isolated. Control and status signals 0-10 VDC or 0/4-20 mA. *Analogue/Digital interface. Two controls, and two status signals 0-10 VDC and two controls and two status signals 24 VDC. *Digital interface with four inputs and four outputs. Control signals 24 VDC. Status signals via voltage free relay contacts; contact data 24 VDC or 24 VAC. Standard configuration: On/Off, Block/Run, Power On and Alarm. *Electrically controlled AC breaker. *External reference shunt, 60 mV. *Polarity Reversal. *Raise/Lower function. *Remote control options: ControlKraft Touch or ControlKraft Digital *RS-232C interface for control of one power supply. *Standard configuration: Iset, Uset, lact and Uact: 0-10 VDC. On/Off, Block/Run, Power On and Alarm as digital signals: 24 VDC. *Standard configuration: lset, Uset, lact and Uact: 4-20 mA | *Analogue interface with four inputs and four outputs galvanically isolated. Control and status signals 0-10 VDC or 0/4-20 mA. *Analogue/Digital interface. Two controls, and two status signals 0-10 VDC and two controls and two status signals 24 VDC. *Digital interface with four inputs and four outputs. Control signals 24 VDC. Status signals via voltage free relay contacts; contact data 24 VDC or 24 VAC. Standard configuration: On/Off, Block/Run, Power On and Alarm. *Electrically controlled AC breaker. *External reference shunt, 60 mV. *Polarity Reversal. *Raise/Lower function. *Remote control options: ControlKraft Touch or ControlKraft Digital *RS-232C interface for control of one power supply. *Standard configuration: Iset, Uset, lact and Uact: 0-10 VDC. On/Off, Block/Run, Power On and Alarm as digital signals: 24 VDC. *Standard configuration: lset, Uset, lact and Uact: 4-20 mA | |||||
| Manufacturer | KraftPowercon | |||||||||
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