1SDA126450R1 ABB Cable Interlock B, C, D Vertical E2.3–E6.3

Why Choose the ABB 1SDA126450R1 Vertical Cable Interlock?

The ABB 1SDA126450R1, product designation Cable interlock B,C,D - Vert E2.3..E6.3, is a dedicated vertical cable mechanical interlock accessory for ABB SACE Emax 3 circuit breakers. Designed for the E2.3 through E6.3 frame range, it forms part of ABB's mechanical interlocking system for coordinating the operating states of multiple circuit breakers within low-voltage switchgear.

This accessory is specifically intended for interlock configurations B, C and D and uses a vertical cable arrangement. Cable interlocking provides mechanical coordination between breakers so that predefined combinations of circuit breakers cannot be closed simultaneously, helping switchboard designers implement controlled source-transfer, bus-coupling and multi-breaker operating sequences.

The 1SDA126450R1 is compatible with the ABB SACE Emax 3 E2.3, E4.3 and E6.3 frame families. As a mechanical accessory, it operates independently of electronic trip-unit protection and is intended to be used with the appropriate Emax 3 interlock supports, cables and breaker-side components required by the selected interlocking scheme.

Key Advantages

• Genuine ABB SACE Emax 3 mechanical interlock accessory.
• Designed for E2.3 through E6.3 circuit-breaker frames.
• Supports ABB mechanical interlock configurations B, C and D.
• Vertical cable arrangement for compatible switchboard layouts.
• Mechanically coordinates the operating states of multiple circuit breakers.
• Helps prevent prohibited breaker-closing combinations.
• Suitable for source-transfer, bus-coupler and multi-breaker interlocking schemes.
• Mechanical operation does not depend on an electronic trip unit or communications network.

Key Features

• ABB SACE Emax 3 accessory.
• Cable-operated mechanical interlock.
• Compatible with interlock types B, C and D.
• Vertical (Vert) cable configuration.
• Compatible with E2.3, E4.3 and E6.3 frame sizes.
• Designed for coordinated operation of multiple circuit breakers.
• Provides mechanical blocking of incompatible breaker states.
• Suitable for low-voltage switchboard interlocking arrangements.
• Works as part of the complete ABB Emax 3 mechanical interlock system.
• Dedicated alternative to the horizontal B, C and D cable-interlock version.
• No control voltage required for the mechanical interlocking function.

Mechanical Interlocking for Multi-Breaker Systems

Mechanical interlocking is used where the operating state of one circuit breaker must physically restrict the permissible state of another. In Emax 3 switchboards, this can be used to prevent incompatible power sources or bus sections from being connected simultaneously. Because the interlocking action is mechanical, it provides physical coordination independently of software, communications or electronic control logic.

The ABB 1SDA126450R1 is the vertical cable version for B, C and D interlocking configurations across E2.3, E4.3 and E6.3 frames. ABB also provides dedicated horizontal cable versions, Type A cable interlocks, lever components and interlock supports, allowing the mechanical interlocking system to be configured around the required breaker arrangement and switchboard geometry.

Typical Applications

• ABB SACE Emax 3 multi-breaker switchboards.
• Dual-source power distribution systems.
• Transformer incomer and bus-coupler arrangements.
• Generator and mains interlocking schemes.
• Bus-section and bus-tie applications.
• Industrial low-voltage distribution switchgear.
• Data centres and critical-power distribution systems.
• Infrastructure and process-industry switchboards requiring mechanical breaker coordination.