VCB/ACB AT Ratings
VCB/ACB AT Ratings
(OP)
Hi,
Like we mention AF/AT (Ampere Frame/Ampere Trip)ratings for MCCB, is there any thing that we can mention the same for ACB's & VCB's.
If so, for a 1200A frame VCB, what are the AT ratings available.
thaks in advance,
tlp23
Like we mention AF/AT (Ampere Frame/Ampere Trip)ratings for MCCB, is there any thing that we can mention the same for ACB's & VCB's.
If so, for a 1200A frame VCB, what are the AT ratings available.
thaks in advance,
tlp23





RE: VCB/ACB AT Ratings
VCB is a vacuum circuit breaker? This is not LV technology in my experience and the AF/AT concept is invalid. It will normally have a same manufacturer's protection relay installed, but should support any manufacturer's relay as required. The tripping levels are as adjustable as the relay permits, but usually quite a wide range, and could also depend on CT selection.