Schneider Electric Braking Resistor VW3A7730

Description

The Schneider Electric VW3A7730 is a high-quality braking resistor designed for use with the Altivar series of variable speed drives. Its primary function is to dissipate regenerative energy generated during motor deceleration, preventing drive overvoltage faults and ensuring smooth, controlled stopping. The resistor is housed in a robust, ventilated metal enclosure for optimal heat dissipation and protection.

Specifications

• Manufacturer: Schneider Electric
• Part Number: VW3A7730
• Product Type: Braking Resistor
• Resistance: 100 Ohm
• Continuous Power Dissipation: 0.1 kW
• Protection Rating: IP20
• Nominal Voltage: Up to 600V
• Compatibility: Altivar 12, Altivar 31, Altivar 312, Altivar 32, Altivar Machine ATV320, Lexium 32

Application

This resistor is essential for applications with high inertia loads or frequent start/stop cycles, such as conveyors, hoisting equipment, centrifuges, and material handling systems, where rapid deceleration is required.

Country of Origin

Made in Germany.

CO2 Impact

Opting for this component helps avoid approximately 8.8 kg of CO2 emissions compared to manufacturing a new one, contributing to a more sustainable industrial environment.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

How do I correctly size a braking resistor for my application?

Answer

Sizing depends on the motor's power, the load's inertia, the braking duty cycle, and the desired deceleration time. Always consult the drive's technical manual for the recommended resistance (Ohm) and power (kW) values to avoid damaging the drive or the resistor.

Can I mount the VW3A7730 inside a sealed electrical cabinet?

Answer

It is strongly recommended to mount braking resistors outside the cabinet or in a well-ventilated area. They generate significant heat during operation, and mounting them in a sealed enclosure can lead to overheating and premature failure of both the resistor and other components.

What is the function of the thermal switch sometimes found with braking resistors?

Answer

While this model may not include one, a thermal switch is a safety device that opens the circuit if the resistor overheats. It sends a signal to the drive to stop the braking cycle, protecting the resistor from damage due to an excessive duty cycle or ventilation failure.

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Last Update: Friday, March 13, 2026