SCHNEIDER 170NEF11021 Output module

Schneider Electric Braking Resistors Overview

Schneider Electric offers a range of braking resistors designed for use with Variable Speed Drives (VSDs). These resistors dissipate the regenerative energy generated by the motor during deceleration or braking as heat, enabling effective motor deceleration and braking.

Product Detailed Description

• Function:

• Converts and dissipates the regenerative energy generated by the motor during deceleration or braking by the VSD into thermal energy.

• Prevents overvoltage tripping of the VSD due to excessive regenerative energy.

• Enables fast and controlled motor deceleration and braking.

• Features:

• Wide range of power ratings and resistance values available to suit different motor and application requirements.

• Robust industrial design capable of withstanding high power dissipation and industrial environments.

• Different mounting options available, such as panel mounting and DIN rail mounting.

• Some models offer overheating protection.

• Optional IP ratings to suit different environmental conditions.

Product Parameters

As Schneider Electric offers a variety of braking resistors, the following are some general parameters. Always refer to the official datasheet for the specific model:

• Continuous Power Rating:

• Ranges from tens of watts to several kilowatts.

• Resistance Value:

• Select the appropriate resistance value based on application requirements.

• Peak Power Capability:

• Indicates the maximum power the resistor can withstand for a short period.

• Operating Voltage:

• Matches the DC bus voltage of the connected VSD.

• IP Rating:

• E.g., IP20, IP54, IP65.

• Cooling Method:

• Natural cooling or forced air cooling (depending on the power rating).

• Mounting Type:

• E.g., panel mounting, DIN rail mounting.

• Connection Method:

• E.g., screw terminals.

• Overheating Protection:

• Some models have built-in thermistors or thermal protection switches.

Product Advantages

• Improved Braking Performance:

• Enables fast and controlled motor deceleration and braking.

• VSD Protection:

• Prevents overvoltage tripping of the VSD due to excessive regenerative energy, improving system reliability.

• High Adaptability:

• Wide range of power ratings and resistance values available for different applications.

• Robust and Durable:

• Capable of withstanding industrial environments and high power dissipation.

• Easy Installation:

• Various mounting options available.

Precautions

• Correct Selection:

• Select the appropriate power rating and resistance value based on motor power, braking torque requirements, braking frequency, and the VSD's DC bus voltage. Refer to the VSD selection guide.

• Correct Installation:

• Follow Schneider Electric's installation guidelines, ensuring the resistor is mounted on a well-ventilated, non-flammable surface with adequate space for heat dissipation.

• Correct Wiring:

• Connect the resistor and VSD correctly according to the wiring diagram, ensuring secure and reliable connections.

• Overheating Protection:

• If the resistor has overheating protection, ensure it is connected correctly and functioning properly.

• Safe Operation:

• The resistor generates a significant amount of heat during braking. Do not touch it and ensure no flammable materials are nearby.

• Regular Inspection:

• Periodically inspect the resistor for any signs of damage and ensure connections are tight.

Product Applications

Schneider Electric braking resistors are widely used in industrial applications requiring frequent braking or rapid deceleration, including but not limited to:

• Cranes and Hoists:

• Enabling precise lifting and lowering control.

• Conveyors:

• Enabling rapid stopping to prevent material slippage.

• Centrifuges:

• Enabling rapid deceleration.

• Machine Tools:

• Rapid braking of spindles.

• Packaging Machines:

• Precise motion control and rapid stopping.

• Wind Turbines:

• Braking control of rotor blades.

• Elevators:

• Smooth and reliable braking.

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