✅ ABB KLC Key Lock – Ronis Type – XT2/XT4 – (Part No.: 1SDA066600R1) The ABB KLC Key Lock (1SDA066600R1) is a mechanical Ronis-type lock used to prevent unauthorized operation of XT2 and XT4 circuit breakers. It provides a physical locking mechanism using a key that can be standardized (same keys) across multiple breakers or panels for simplified access management. Ideal for safety-critical applications where operation must be restricted to authorized personnel only, the KLC lock adds a secure layer of mechanical interlocking to the electrical protection system. Technical Specifications: Part Number: 1SDA066600R1 Model: KLC – Ronis Key Lock Type: Mechanical lock with same-key mechanism Compatibility: XT2 and XT4 breakers Function: Prevent unauthorized manual operation Material: Robust metal cylinder with Ronis standard Application: Safety interlock and operational access control