External Accessories, Locking device for breaker with Toggle lever-3VM9388-0LB10

Product Description

Siemens External Accessories – Locking Device for Breaker with Toggle Lever – 3VM9388-0LB10

The Siemens 3VM9388-0LB10 is an external locking device accessory designed for SENTRON 3VM MCCB systems. It is used to secure the breaker operating toggle/handle in ON or OFF position, preventing unauthorized switching and ensuring safe isolation during maintenance or lockout-tagout (LOTO) procedures.

This accessory is commonly used in LT panels, MCC/PCC panels, industrial distribution boards, and OEM switchgear assemblies, where operational safety and controlled access are critical.

Key Features:

• Siemens SENTRON 3VM series accessory 

• Part Number: 3VM9388-0LB10 

• Locking device for toggle lever / operating handle 

• Provides mechanical locking of MCCB handle in ON or OFF position 

• Supports LOTO (Lockout-Tagout) safety procedures 

• Prevents accidental or unauthorized switching of breaker 

• Suitable for industrial power distribution systems 

• Compact and easy-to-install design 

• High-strength industrial-grade construction 

• Designed for reliable operation in harsh panel environments 

• Compatible with selected 3VM MCCB frame ranges (100A–630A variants)