178B2091
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MPN: FCD307PT4P66EXR1D0F10T00C0
No Tariffs On US Orders- Straightforward Pricing: No Rush Fees, No Credit Card Fees
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In-Stock, Ships 1-2 Days
The Danfoss 178B2091 drive, part of the FCD 300 Micro Drives series, features a top-coated compact enclosure with an IP66 rating. It delivers a power rating of 0.75 kW/1.0 HP, supports three-phase inputs, and operates at 380-480V with 50/60 Hz mains voltage. The drive weighs 4.35 kg net.
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Product Description:
The 178B2091 Frequency Converter is a robust device designed to ensure stable and efficient control of motors across a range of industrial environments. It is built to tolerate challenging electrical environments and the wide frequency range allows for smooth acceleration and deceleration of motors.
The 178B2091 frequency converter from Danfoss includes one analogue current input at terminal 60 that supports a current level of 0 to 20 mA with scalable adjustment. The input resistance of the input is approximately 300 ohms and the maximum current capacity is 30 mA that allows accurate current signal handling. The control card of this converter provides a stable 10 V DC output at terminal 50. The output voltage is maintained at 10.5 V ± 0.5 V with a maximum load of 15 mA. This model enhances operational safety by automatically managing generated overvoltage conditions particularly when the motor functions as a generator. The converter prevents voltage buildup in the intermediate circuit through protective disconnection of the IGBT module. It supports effective motor deceleration even with high inertia loads and short ramp down times that ensures energy is dissipated correctly within the system. This combination of functions provides stable motor operation while reducing the risk of system faults.
The 178B2091 frequency converter has been tested with both 10 meter unscreened/unarmored cables and 10 meter screened/armored cables that confirms stable operation under both configurations. The power factor of this model at 400 V is rated between 0.90 and 1.0 at full load that supports efficient energy use. The supply input can be connected up to two times per minute across terminals L1, L2 and L3. The converter is rated for a maximum short circuit withstand value of 100,000 A.
Frequently Asked Questions about 178B2091:
Q: How does the 178B2091 frequency converter manage motor-generated overvoltage during high inertia deceleration?
A: It prevents intermediate circuit overvoltage by disconnecting the IGBT module during regenerative events. This allows safe and efficient braking even with short ramp-down times or heavy rotating loads.
Q: What analog current signal capabilities does the Danfoss 178B2091 converter offer for external control integration?
A: It includes one current input at terminal 60, accepting 0–20 mA signals with a 300 Ω input resistance. This supports scalable and accurate current-based command functions.
Q: How does the 178B2091 converter maintain power quality and efficiency under full load at standard line voltage?
A: It achieves a power factor between 0.90 and 1.0 at 400 V input. This minimizes reactive power draw, improving energy use and reducing upstream losses.
Q: What kind of cable configuration tolerance does the 178B2091 frequency converter offer in noisy industrial environments?
A: It has been validated for both 10 m unscreened/unarmored and screened/armored cable runs. This ensures stable performance regardless of EMI exposure or cable shielding level.
Q: How does the Danfoss 178B2091 frequency converter ensure safe reconnection and protection from line-side disturbances?
A: It allows input switching across L1, L2, and L3 up to two times per minute. The unit also withstands short circuit currents up to 100,000 A, ensuring high system resilience.
