Product Introduction
A braking resistor for VFD is used to dissipate the regenerative energy generated by the motor during rapid deceleration or stopping of a variable frequency drive (VFD), preventing excessive bus voltage and protecting the system.
Product advantages
High-Quality Alloy Wire: Iron-chromium-aluminum alloy wire, withstands temperatures over 300°C, preventing accidental breakage.
Wide Power Range: Single units range from 100W to 50kW, expandable with series or parallel connections.
Precise Resistance: Tolerance up to ±5%, ensuring precise control of braking current, preventing unexpected shutdowns or insufficient braking.
High Insulation Safety Level: Insulation resistance ≥100MΩ, preventing leakage current hazards.
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FAQ
Q: Does your product comply with international IEC or national GB standards? What are the specific standard numbers?
A: Yes, our braking resistors are designed and tested in strict accordance with IEC 60068 and GB/T 5729, among other relevant standards, ensuring compliance with electrical performance and environmental reliability.
Q: How do you ensure the accuracy and stability of the resistor's value?
A: We use high-quality resistor wire/alloy materials along with precise winding processes. Before shipment, 100% of the resistors undergo resistance, withstand voltage, and temperature drift tests, ensuring the resistance tolerance is within ±5% (or a smaller tolerance as required by the customer) and maintaining excellent temperature stability.
Q: What is the average service life of the braking resistor? What factors affect its lifespan?
A: Under normal load and optimal cooling conditions, the design lifespan of our braking resistors is between 5 to 10 years. Key factors affecting lifespan include actual temperature rise, operating environment humidity, dust contamination, and whether the resistor is in a long-term overload condition.
Q: Do you offer discounts for large volume purchases? How is the discount calculated?
A: Yes, we offer tiered discounts for bulk purchases. The discount amount is customized based on your order quantity, model consistency, and long-term cooperation intentions. Please contact our sales manager for a detailed quotation.
Q: How is the shipping lead time ensured? What is the delivery time for small and large volume orders?
A: For standard models, small batch (1-50 units) orders are typically shipped within 1-3 working days. Large batch (over 100 units) or custom orders usually have a production cycle of 7-15 working days, depending on the contract agreement.
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