Case 1: Single-pole MCB in factory workshop (Schneider iC65N)
Scene: Workshop lighting / socket circuits, single-pole miniature circuit breaker, handle with standard lock hole
Circuit breaker: Schneider iC65N 1P C16
Selection: Snap-on dedicated lock (such as Schneider A9A26970 / Badi 65387)
Selection reason:
The dedicated snap-on precisely fits the handle of iC65, preventing vibration and detachment
Tool-free, quick installation, 10 seconds to complete locking by one person
Compatible with standard padlocks, meeting single-person LOTO requirements
Compliance: Conforms to GB/T 14048.2, NFPA 70E, visible break point + physical locking
Case 2: Mixed brand distribution cabinet (multiple brands MCB)
Scene: Property distribution room, including Schneider, Siemens, ZTE, etc. single-pole MCBs
Circuit breaker: Handle width 12–20mm, some without lock hole
Selection: General adjustable circuit breaker lock (such as BOZZYS D18 / Master 493B)
Selection reason:
Adjustable snap-on covers 12–23mm handles, compatible with multiple brands
Clamping locking, suitable for MCBs with or without lock holes
Engineering nylon + stainless steel, resistant to oil stains, impact resistance
Compliance: Meets NEC 110.25, suitable for unified selection in mixed brand on-site
Case 3: Industrial three-phase main circuit (plastic shell MCCB)
Scene: 37kW motor main circuit, Schneider NSX100N 3P
Circuit breaker: Three-pole联动 plastic shell， handle width 25mm， no standard lock hole
Selection： Linking three-pole lock (such as Loko M-K24 / E-T-A X4230)
Selection reason：
Linking of the three-pole handle by the link， preventing accidental tripping
Large clamping force suitable for the heavy handle of MCCB， preventing accidental opening
Supports multi-person multi-lock， meeting team maintenance LOTO requirements
Compliance： Conforms to IEC 60947-3， suitable for high-power industrial circuits
Case 4： Holeless plastic circuit breaker (ABB Tmax)
Scene： Distribution cabinet in chemical area， ABB Tmax T1N 3P， handle without lock hole， compact space
Circuit breaker： No lock hole， short handle travel
Selection： Holeless dedicated clamping lock (such as Badi 65680 / Master 495)
Selection reason：
Fully enclosed clamping， not relying on lock hole， suitable for special MCCB
Ultra-thin design， suitable for densely installed distribution cabinets
Anti-pick structure， meeting high safety requirements of chemical area
Compliance： Meets ATEX explosion-proof environment requirements， suitable for special designed circuit breakers
Case 5： Distribution room main cabinet (universal circuit breaker)
Scene： 1000A universal circuit breaker (DW45)， whole cabinet maintenance
Circuit breaker： Drawer-type / Fixed universal circuit breaker， cabinet door can be opened
Selection： Cabinet door panel lock + circuit breaker body double-key lock
Selection reason：
Panel lock seals the cabinet door， preventing unauthorized personnel from entering
Double-key lock for the body， requires two keys to unlock， two-person supervision
Multi-level protection， meeting high-risk distribution room LOTO specifications
Compliance： Meets power industry safety regulations， suitable for main incoming / main transformer circuits
Case 6： Collaborative maintenance (simultaneous locking of multiple circuits)
Scene： Production line shutdown major repair， 10 devices simultaneously maintained， multiple people working
Circuit breaker： Multiple single / three-pole MCBs + MCCB mixed
Selection： Multiple lock clips + collective lock box + circuit-specific locks
Selection reason：
Each circuit is independently locked with individual lock
Multiple lock clips support simultaneous locking of the same circuit by multiple people
Collective lock box manages keys uniformly， unlocking requires confirmation from all personnel
Compliance： Meets OSHA 1910.147， meeting collaborative LOTO requirements
Post time: Mar-19-2026
