SQN30.401A2700 SIEMENS Programmable controller

Description

SQN30.401A2700 SIEMENS Programmable controller

Product Dimensions：

Product Description

The 3RU2126-4CB0 is a part of a modular generation of load feeders designed for reliable current-dependent protection. It operates on the bimetal principle, where heating caused by current flow triggers a mechanical release to disconnect the motor from the power supply via a contactor. This device is specifically engineered to integrate seamlessly with various control components, providing a compact and coordinated solution for motor starters. It features integrated auxiliary contacts for signaling faults to a programmable controller, ensuring that the control logic is aware of the protective trip.

Product Parameters

This specific module is defined by the following technical specifications:

• Current Setting Range: Adjustable thermal release range, typically covering a specific span (e.g., 18 to 25 Amperes).

• Trip Class: Usually Class 10, meaning it trips within 10 seconds at six times the set current from a cold state.

• Size: S0, matching the standard dimensions for medium-range contactors and feeders.

• Auxiliary Contacts: Equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) contact for status feedback.

• Mounting Type: Designed for direct mounting onto contactors or stand-alone installation using a dedicated support.

• Connection Method: Screw terminals for secure electrical contact in high-vibration environments.

• Reset Function: Manual and automatic reset modes with a dedicated reset button and stop function.

Product Advantages

• Space Efficiency: The direct mounting capability reduces the amount of wiring and the footprint required inside the control cabinet.

• Phase Failure Sensitivity: Integrated protection mechanisms detect phase imbalances or failures, preventing motor burnout.

• Ease of Commissioning: The clear adjustment dial allows for precise setting of the rated motor current without specialized tools.

• Ambient Temperature Compensation: Designed to maintain accuracy and prevent nuisance tripping even when internal cabinet temperatures fluctuate.

• Seamless System Integration: High compatibility with programmable controllers via auxiliary contacts allows for remote monitoring and automated system restarts.

Precautions for Use

• Current Setting: The adjustment dial must be set precisely to the motor’s actual rated current (FLA) as indicated on the motor nameplate to ensure effective protection.

• Trip Class Alignment: Verify that the trip class matches the motor’s startup characteristics; heavy-duty starts may require a higher trip class to avoid premature tripping.

• Terminal Torque: Proper torque must be applied to the screw terminals to prevent loose connections, which can lead to localized heating and false trips.

• Environmental Derating: If the module is installed in high-altitude or extremely high-temperature environments, derating factors must be applied to the current settings.

• Test Frequency: The integrated test function should be used periodically to verify the mechanical functionality of the trip mechanism and auxiliary contacts.

Product Applications

The 3RU2126-4CB0 is utilized in diverse industrial control systems to protect rotating equipment:

• Motor Feeders: Serving as the primary thermal protection for standard three-phase AC motors in conveyor systems and production lines.

• Pump and Fan Control: Protecting ventilation and fluid transport equipment from overcurrent conditions in building management systems.

• Manufacturing Machinery: Monitoring load conditions for industrial mixers, grinders, and packaging equipment.

• Distributed Control Systems: Providing local protective feedback to a centralized programmable controller in large-scale industrial plants.

• Safety Architectures: Acting as a reliable mechanical backup to electronic monitoring systems to ensure hardware safety during electrical faults.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

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