High pressure contact switch, how do I turn this off?

[Ozymandias]

Hi all,
I’ve got a HPC 1600 amp main breaker that I need to shut down to replace breakers in the switch gear. How do I turn it off and back on?
i will turn everything off downstream and turn back on one at a time.
Thank you for any direction you ca n give.

 

[roger]

Push the off button.

Roger

 

[ptonsparky]

Bring your own TP, if you’ve never tripped it before. Same with cranking it back on. They make me jump every time.

 

[roger]

Bring your own TP,

May be the wrong time for this project.

Roger

 

[Ozymandias]

Lol, I’ll bring a pair of emergency undies.
Got it. Push button off, but back on you crank lever. Thanks!

 

[Jraef]

And WHILE you are working, you slide that tab up overt the Off button to keep it depressed, then put in your padlock. As long as that button is depressed, the switch cannot be re-closed.

 

[hillbilly1]

And WHILE you are working, you slide that tab up overt the Off button to keep it depressed, then put in your padlock. As long as that button is depressed, the switch cannot be re-closed.

Don’t forget the multihasp too if more than one person is in the gear!

 

[Hv&Lv]

Bring your own TP, if you’ve never tripped it before. Same with cranking it back on. They make me jump every time.

Loud as an old Westinghouse when the spring recharges or louder?

we have old 25kV and some 115kV air blast breakers.
I'm jumpy anyway... those make me jump..

 

[Ozymandias]

Duly noted

 

[sameguy]

Kerr bang!

 

[dkidd]

I have had a couple of them that din't fully open the contacts, they were stuck. Verify.

 

[ptonsparky]

I have had a couple of them that din't fully open the contacts, they were stuck. Verify.

Probably something that should be cycled more than once a decade.

 

[hillbilly1]

I have had a couple of them that din't fully open the contacts, they were stuck. Verify.

Usually find those during storm duty, old stores, and the switch had never been opened since it was first energized! Can’t hook the entire store up to generator, so the customer isn’t happy.

 

[zbang]

Probably something that should be cycled more than once a decade.

Or even, gasp, be tested and PM'd.

 

[Besoeker3]

I have had a couple of them that din't fully open the contacts, they were stuck. Verify.

Absolutely! I would also add padlock in the OFF position as Jraef stated.

 

[PaulMmn]

That's why our computer hot site test their circuit breakers, generators, elevators, security keypads at least once a year.

 

[dkidd]

Here is a picture of a switch that was in the "open" position.

 

[mbrooke]

And WHILE you are working, you slide that tab up overt the Off button to keep it depressed, then put in your padlock. As long as that button is depressed, the switch cannot be re-closed.

Good words of advice!

 

[Jraef]

When I worked at a steel mill in the late 70s, someone I knew was killed when he didn't lock off a Pringle Switch feeding a switchboard that fed a nail production line. We don't know why he didn't lock it off, but we thought maybe because the room itself was locked. A production supervisor started his shift, panicked about why the nail line was not running and making him miss his quota, went over and saw the switch open and re-closed it. He lost his job, the electrician lost his life.