shunt trip

[DBURBS]

I have two 2 lead shunt trip breakers in a panel controlling two dedicated receptacles, the trip leads go to the load and the NC terminal of a hood ansul panel. Everything works great without a load, but when I plug in a piece of equipment the shunt trips. Any suggestions.

 

[augie47]

I'm a little lost on where you have the leads are connected. The "wire" leads to the shunt are feeding a coil. One lead woulld normally be the "neutral" and other fed by you ansul switch. This is assuming a 120v shunt coil. The term "neutral" might need some alteration if your coil voltage is other than 120v.

 

[DBURBS]

I have one lead from the ansul feeding the shunt and the other powering the device.I sent power to a common in the ansul cabinet from my shunt breaker, came off of the NC terminal to one shunt lead and to the device from the other lead, should have I powerd my shunt coil from the ansul, tied the other lead to the device neutral and powerd the receptacle from the breaker? ( this is my first shunt breaker )

 

[scotteng]

The leads on a shunt-trip breaker are connected to the coil inside the breaker. This coil opens the breaker when voltage is applied to the coil. That is why your breaker keeps tripping.

These leads should be connected to the dry contact on the ansul hood. The devices you are powering (and thus contolling) is fed from the breaker just like all other breakers. When the ansul system goes off and closes the contacts, power is delivered to the shut-trip coil and this opens the breaker and shuts off power to the device(s) under the hood.

 

[augie47]

agree. wire your load just like you would to a standard breaker.
Treat your ansul just as you would a wall switch with the leads on your shunt trip breaker being a light that switch controlled.

 

[DBURBS]

thank you, that clears it up for me.