SCHNEIDER SR2E121BD Load Switches

Description

SCHNEIDER SR2E121BD Load Switches

Schneider Electric offers a comprehensive range of Load Break Switches (LBS), primarily under the ComPact INS/INV, FuPact, and MasterPact series. These devices are designed to make, carry, and break currents under normal circuit conditions, including specified operating overload conditions.

1. Product Detailed Description

Schneider Load Switches are non-automatic switching devices used for manual or remote isolation of electrical circuits. Unlike circuit breakers, standard load switches do not provide automatic overcurrent protection (unless fused); their primary role is safe switching and visible isolation.

• INS Series: Dedicated to high-performance disconnection with a positive contact indication.

• INV Series: Offers visible breaking (the actual separation of contacts can be seen through a transparent cover).

• FuPact Series: Combines a load switch with fuses for integrated short-circuit protection.

2. Technical Parameters (General Range)

While specific parameters vary by model (e.g., INS250 vs. INS1000), the general range is as follows:

3. Product Advantages

• Positive Contact Indication: The handle position always accurately reflects the state of the contacts, ensuring safety during maintenance.

• Modular Accessories: Shared accessories with the ComPact NSX range (extended handles, auxiliary contacts, terminal shields), reducing inventory costs.

• High Thermal Endurance: Designed to carry full rated current even in high-temperature environments (up to 60°C without derating in some models).

• Class II Front Face: Ensures total insulation between the internal circuits and the front of the device for operator safety.

• Interlocking Options: Easily configured for Source Changeover (Manual or Motorized) to switch between a primary grid and a backup generator.

4. Important Considerations (Precautions)

• No Internal Protection: Standard INS/INV switches do not trip on short circuits or overloads. They must be coordinated with upstream fuses or circuit breakers.

• Utilization Category: Ensure the switch is rated for the load type. An AC-23A rating is required for switching motors or highly inductive loads, whereas AC-21A is only for resistive loads.

• Maintenance: Periodically check the tightness of terminal connections, as thermal cycling can loosen bolts, leading to overheating.

• Voltage Polarity: For DC applications, pay strict attention to the wiring diagrams, as some models require series-connected poles to achieve the rated voltage.

5. Product Applications

• Service Entrance: Main isolator in industrial or commercial distribution boards.

• Local Isolation: Used near motors or heavy machinery to ensure safe lockout/tagout (LOTO) during repairs.

• Transfer Switching: Used in pairs with a mechanical interlock for manual switching between Two Power Sources (Grid/Gen).

• Photovoltaic Systems: Specifically designed DC load switches are used to isolate solar array strings from the inverter.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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

Service: Professional Sales provides 24 hours /7 days online service

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