Circuit Breaker Lockout Device Miniature Circuit Breaker Lockout Pinout Power Isolation Electrical Security Lock Device for MCB

The media could not be loaded. The concept of a Micro Circuit Breaker lockout is a good one to help ensure a circuit you intend to be off, especially while working on that line, doesn't accidentally get turned on.However, I couldn't get this one to fit.I understand it is supposed to go on with the round side up and the flat side down, that you pull back the tab to move the rods from their lock to unlock position, angle it on and then push the tab back to lock it. However, like the other reviewer, I couldn't get it to fit. The manufacturer's video doesn't show anything useful in this regard, and there are no instructions (not that I would expect them for such a simple device).Net, it could be operator error, but I can't get this to function as I believe it should function.

I could not tell from the listing what kind of “miniature circuit breaker” this lockout is intended to secure. I have a number of small DC breakers on a solar control panel which cannot be secured by lockouts designed for conventional breakers, so…? Nah, these are for something else, so I don’t know whether it is a great product or not.The locking principle is based upon two small outward pointing steel prongs which are supposed to expand out into holes on the “miniature circuit breaker” to keep the locking device in place to block operation. When the device is open/unlocked, the ends of the prongs are 0.4” apart. When the device is closed/locked, the ends of the prongs are 0.5” apart. So engagement on each side is only about 1mm — a pretty specific tolerance. I can’t see anything else which moves or adjusts — you either have the correct breaker or you don’t. The locking holes will accept a common lockout padlock.