1SDA073787R1 ABB KLC-S Key Lock Open N.20009 E1.2

Why Choose the ABB 1SDA073787R1 Emax 2 KLC-S Key Lock?

The ABB 1SDA073787R1 is a KLC-S key lock accessory designed for ABB SACE Emax 2 E1.2 air circuit breakers. Identified by ABB as KLC-S Key lock open N.20009 E1.2, it provides a mechanical locking function that allows the compatible circuit breaker to be secured in the open position.

As part of the ABB SACE Emax 2 accessory range, the KLC-S key lock supports controlled operation of low-voltage switchgear by helping prevent unauthorised or unintended closing of the circuit breaker while the locking function is engaged. This makes it particularly useful in installations where operating procedures, maintenance activities or switchgear interlocking arrangements require the breaker to remain open.

This version is supplied for the Emax 2 E1.2 frame and uses key lock number N.20009. Its dedicated mechanical design integrates with the circuit breaker operating mechanism to provide a practical means of securing the breaker in its open state.

Key Advantages

• Genuine ABB SACE Emax 2 mechanical locking accessory.
• Allows a compatible circuit breaker to be locked in the open position.
• Helps prevent unintended or unauthorised circuit breaker closing.
• Designed specifically for the ABB SACE Emax 2 E1.2 frame.
• Supplied with key lock number N.20009.
• Suitable for switchgear operating procedures, maintenance control and mechanical interlocking applications.

Key Features

• ABB SACE Emax 2 circuit breaker accessory.
• KLC-S key locking system.
• Designed to lock the circuit breaker in the open position.
• Key number N.20009.
• Compatible with Emax 2 E1.2 air circuit breakers.
• Mechanical locking function requiring no external electrical supply.
• Supports controlled access to circuit breaker operation.
• Suitable for industrial and commercial low-voltage switchgear.
• ABB order code and Product ID 1SDA073787R1.

Controlled Circuit Breaker Operation and Open-Position Locking

Key locking accessories provide a mechanical means of controlling circuit breaker operation. When the ABB KLC-S lock is engaged, the associated Emax 2 circuit breaker can be secured in the open position, helping ensure that the breaker cannot be closed until the prescribed key-operated release procedure has been completed.

The ABB 1SDA073787R1 is particularly useful in installations where access to circuit breaker operation must be controlled or coordinated with defined switching procedures. The N.20009 key coding also enables the correct lock configuration to be specified when planning switchboard locking and interlocking arrangements.

Typical Applications

• ABB SACE Emax 2 E1.2 air circuit breaker installations.
• Circuit breaker open-position locking.
• Low-voltage switchboards and switchgear assemblies.
• Controlled electrical maintenance procedures.
• Mechanical switchgear interlocking arrangements.
• Industrial, commercial and infrastructure power distribution systems.