Cassie
New Member
Hi,
We have 60A, 230V incoming to a din rail cabinet of breakers and control equipment. The input power is connected directly to a disconnect switch, then tied to a bus bar/mini circuit breaker system of about 30 breakers, some three phase, some one phase, ranging from 30A to 10A.
I'm needing to cut all power to the system with an estop, as there are moving parts attached to almost every breaker.
I've looked into adding anther three phase breaker before the disconnect switch, and adding a shunt breaker which will allow me to remotely trip this breaker (before it hits the disconnect switch). However, I've only found two options for this kind of setup: overvoltage trip, and undervoltage trip.
Undervoltage means that any time the machine is turned off, the breaker would trip. So, we would have to turn on the system, then open the breaker cabinet and switch on the breaker, every time. We have the system set up so that you have to close the cabinet before turning on the disconnect switch. This is backwards to our physical design.
Overvoltage means that we have to supply voltage to the breaker to trip it, so if there is a fault in the wire or the connection, the emergency stop wouldn't work. We want it to be fault proof (or as fault proof as we can get it).
Other than those two options, I'm stuck. I'm really inexperienced in this kind of thing, and was wondering if you had any other ideas on how we could install an estop in a system like this.
We have 60A, 230V incoming to a din rail cabinet of breakers and control equipment. The input power is connected directly to a disconnect switch, then tied to a bus bar/mini circuit breaker system of about 30 breakers, some three phase, some one phase, ranging from 30A to 10A.
I'm needing to cut all power to the system with an estop, as there are moving parts attached to almost every breaker.
I've looked into adding anther three phase breaker before the disconnect switch, and adding a shunt breaker which will allow me to remotely trip this breaker (before it hits the disconnect switch). However, I've only found two options for this kind of setup: overvoltage trip, and undervoltage trip.
Undervoltage means that any time the machine is turned off, the breaker would trip. So, we would have to turn on the system, then open the breaker cabinet and switch on the breaker, every time. We have the system set up so that you have to close the cabinet before turning on the disconnect switch. This is backwards to our physical design.
Overvoltage means that we have to supply voltage to the breaker to trip it, so if there is a fault in the wire or the connection, the emergency stop wouldn't work. We want it to be fault proof (or as fault proof as we can get it).
Other than those two options, I'm stuck. I'm really inexperienced in this kind of thing, and was wondering if you had any other ideas on how we could install an estop in a system like this.