1SDA073853R1 ABB DLC Interlock Direct Door E2.2…E6.2

Why Choose the ABB DLC Direct Door Interlock E2.2...E6.2?

The ABB DLC Direct Door Interlock E2.2...E6.2, order code 1SDA073853R1, is a mechanical door-interlocking accessory for ABB SACE Emax 2 air circuit breakers. Designed for the E2.2, E4.2 and E6.2 frame sizes, it provides a direct mechanical link between the circuit breaker and switchboard door.

ABB defines the DLC system as a lock to prevent the door from opening when the circuit breaker is in the closed position. This direct-door version therefore helps prevent access to the breaker compartment while the associated Emax 2 circuit breaker remains closed, supporting controlled switchboard operation and safer access procedures.

The 1SDA073853R1 is the direct mechanical version of the DLC accessory rather than the alternative cable-operated arrangement. For E2.2 through E6.2 applications, ABB specifies that this accessory is used together with the appropriate interlock lever and interlock support, allowing the complete mechanism to coordinate breaker state with enclosure-door access.

Key Advantages

• Genuine ABB SACE Emax 2 mechanical interlocking accessory.
• Helps prevent switchboard-door opening while the circuit breaker is closed.
• Designed for Emax 2 E2.2, E4.2 and E6.2 air circuit breakers.
• Uses a direct mechanical interlock rather than a cable-operated arrangement.
• Supports controlled access to circuit-breaker compartments.
• Mechanical operation does not depend on auxiliary control power.
• Suitable for industrial, infrastructure and critical-power switchgear.

Key Features

• ABB DLC direct door interlock.
• Mechanical interlock between circuit breaker and enclosure door.
• Designed to prevent door opening when the breaker is closed.
• Compatible with SACE Emax 2 E2.2, E4.2 and E6.2.
• Direct-door operating principle.
• Mechanical function independent of electrical control logic.
• ABB classifies the product as a mechanical interlock for switch.
• Designed for use with the required Emax 2 interlock lever and support components.
• IEC accessory for the ABB Emax 2 platform.
• ABB order code 1SDA073853R1.

Reliable Mechanical Door Interlocking for Emax 2 Switchgear

Access to an energised switchboard compartment needs to be coordinated with the operating state of the circuit breaker. The ABB DLC system provides a mechanical relationship between the Emax 2 breaker and the enclosure door, helping ensure that the door cannot normally be opened while the circuit breaker remains in its closed position.

Unlike electrically controlled interlocking, the DLC mechanism operates mechanically and therefore does not rely on PLC logic or an auxiliary control supply for its fundamental interlocking action. The direct-door configuration provides a physical connection to the enclosure-door mechanism, making the 1SDA073853R1 a purpose-designed solution for compatible Emax 2 switchgear assemblies.

Typical Applications

• ABB SACE Emax 2 E2.2, E4.2 and E6.2 air circuit breakers.
• Low-voltage switchboard circuit-breaker compartments.
• Mechanical enclosure-door interlocking.
• Industrial power-distribution switchgear.
• Generator and critical-power distribution systems.
• Infrastructure, utilities and process-industry switchboards.