178B0373
Wake Industrial LLC is not an authorized distributor of this product.
MPN: VLT6052HT4C20STR3DLF10A00C0
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The 178B0373 is a robust HVAC drive with a power output of 20 HP and a nominal efficiency of 95%. Manufactured by Danfoss and part of the VLT 6000 HVAC Drives series, it operates at a supply frequency of 48-62 Hz and supports voltages of 200-240 V. The drive features a NEMA 1 enclosure and weighs 60 lbs.
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Product Description:
The 178B0373 Frequency Converter from Danfoss is designed for efficient motor control in demanding applications. It offers reliable performance, optimized energy use and compliance with international standards.
The 178B0373 frequency converter delivers a rated output current of 143 A at 200 – 230 V. The maximum input current of the frequency converter is 126.6 A at an input voltage of 200 V AC. The recommended pre-fuse rating for this setup is 200 A which provides appropriate overcurrent protection for the converter under normal and fault conditions. The maximum cable cross section for motor and DC bus connections is 95 mm² for copper and 90 mcm for aluminum. The minimum cable cross section for the same is 10 mm². The converter exhibits a maximum power loss of 1361 W when operating under rated load conditions. This power loss encompasses all sources of inefficiency within the converter. The model’s efficiency is maintained at 0.95 across operations. The vibration endurance rating of the model at 0.7 g RMS is 18 – 1000 Hz. The amplitude and frequency of the AC output are precisely controlled through pulse width modulation (PWM) techniques. This allows the converter to deliver a variable frequency suitable for driving motors or other AC loads.
The 178B0373 frequency converter supports a rated shaft output of 37 kW with overload capacity allowing short term operation up to 158 A for 60 seconds. The output current of the model at 240 V is rated at 130 A. Its mechanical design allows secure mounting and easy connection. The relative humidity tolerance for operation is 95 % non condensing while for storage it supports 93 % ± 2 % to – 3 %.
Frequently Asked Questions about 178B0373:
Q: How does the 178B0373 frequency converter manage stable AC output during fluctuating input voltages?
A: It first rectifies incoming AC to a steady DC link via a controlled or uncontrolled stage. Then, an inverter uses high-frequency switching to reconstruct a stable AC output.
Q: What switching method does the 178B0373 converter apply to regulate motor speed with precision?
A: The model uses PWM to adjust output amplitude and frequency accurately. This allows variable frequency control ideal for high-performance motor drive systems.
Q: Can the 178B0373 frequency converter tolerate mechanical stress in environments with continuous vibration?
A: Its vibration resistance is validated from 18 to 1000 Hz at 0.7 g RMS. This endurance ensures long-term reliability in dynamic industrial machinery.
Q: What short-term overload handling capability does the 178B0373 offer in transient high-torque operations?
A: It supports current surges up to 158 A for 60 seconds. This behavior is critical for handling startup loads or demanding motor acceleration phases.
Q: What considerations apply for cable sizing when integrating the 178B0373 frequency converter into a power cabinet?
A: The motor and DC bus lines can use up to 95 mm² copper or 90 mcm aluminum conductors. Minimum sizing starts from 10 mm², ensuring flexibility for installation layouts.
