178B0623
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The 178B0623 is a three-phase drive with a typical shaft output of 3.0 kW and an enclosure class of IP20. Manufactured by Danfoss in their VLT 6000 HVAC Drives series, it features a supply voltage range of 380-480 V (±10%) and supports Profibus DP fieldbus communication. The drive has a rated efficiency of 0.96.
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Product Description:
The 178B0623 Frequency Converter is designed for industrial motor control with reliable performance. The model supports a wide frequency range and high torque during start up. It ensures system stability under various operational loads.
This 178B0623 frequency converter from Danfoss operates at 3 × 380 – 460 V input. It supports 50 - 60Hz supply and 0 – 1000Hz output frequency. The unit delivers a current of 7A input with 7.2A output max and 6.3 A continuous. The apparent output power of the converter is 5.2 kVA. It offers a starting torque up to 160 % for 0.5 seconds while the acceleration torque is rated at 100 % and overload torque reaches 110%. The converter operates within ambient temperatures of up to 45 °C (113 °F). The chassis protection rating of the model is IP20. This ensures basic protection against solid objects. The frequency resolution is precise at ± 0.003 Hz that allows accurate speed control. The system response time is 3 milliseconds which supports rapid control feedback. The speed regulation in open loop mode offers a 1:100 control range of synchronous speed. For speeds under 1500 rpm, accuracy is ± 7.5rpm and for speeds over 1500 rpm, the error is limited to 0.5 % of actual speed.
The 178B0623 frequency converter safety features include monitoring of intermediate circuit voltage which cuts off the converter if voltage limits are exceeded. It also shuts down automatically if a motor phase is missing. In case of a mains fault, it enables a controlled deceleration to protect the motor and system. The frequency converter ensures operational reliability through these built in protections. These safeguards help maintain consistent performance and avoid damage under fault conditions.
Frequently Asked Questions about 178B0623:
Q: What frequency control precision can be expected from the 178B0623 frequency converter in speed-sensitive systems?
A: It offers a resolution of ±0.003 Hz, supporting fine-tuned frequency control. Combined with a 3 ms system response time, this allows fast and accurate speed adjustments in real-time.
Q: How does the Danfoss 178B0623 frequency converter maintain precise motor control during low-speed operation?
A: It delivers ±7.5 rpm speed accuracy below 1500 rpm and maintains 0.5% accuracy above that threshold. The open-loop 1:100 control range enables stable regulation across variable load demands.
Q: What role does the voltage monitoring function in the 178B0623 converter play in protecting connected motors?
A: It continuously monitors the intermediate circuit voltage and disconnects if safe thresholds are exceeded. This protects both drive and motor from overvoltage-related failures.
Q: How does the 178B0623 converter handle torque-intensive motor starts in dynamic applications?
A: It delivers high starting torque during initial acceleration without stalling. This ensures smooth engagement of heavy loads such as conveyors or compressors.
Q: How does the Danfoss 178B0623 support operational safety in the event of a mains fault or missing phase?
A: It initiates a controlled deceleration to protect the motor during power disruptions. If a motor phase is missing, the converter shuts down to prevent damage.
