Instantaneous Override Current (ABB Tmax)
Instantaneous Override Current (ABB Tmax)
(OP)
Hi, does anyone know what the instantaneous override current of an ABB Tmax T4S circuit breaker with PR222 trip unit is? I cannot seem to find an ABB document which has this.






RE: Instantaneous Override Current (ABB Tmax)
RE: Instantaneous Override Current (ABB Tmax)
RE: Instantaneous Override Current (ABB Tmax)
RE: Instantaneous Override Current (ABB Tmax)
RE: Instantaneous Override Current (ABB Tmax)
In my previous message I was referring to US equipment - I should have been more specific.
RE: Instantaneous Override Current (ABB Tmax)
There is no OFF setting on the PR222DS Instantaneous element.
Some ACBs have an OFF setting on the Instantaneous element, however if the current approaches the breaker interrupt rating Icu or Ics, the Instantaneous element will automatically operate.
RE: Instantaneous Override Current (ABB Tmax)
RE: Instantaneous Override Current (ABB Tmax)
If this is built to UL molded case circuit breaker standards, it will have an instantaneous trip (either by setting or override)
RE: Instantaneous Override Current (ABB Tmax)
RE: Instantaneous Override Current (ABB Tmax)