In the range of molded case circuit breakers conforming with the UL 489 and CSA C22.2 No.5 Standard, ABB proposes an entire range which covers current ratings between 15 A and 2500 A and interrupting ratings, at 480 VAC, which can reach 150 kA @480 VAC. The ranges available are as follows:
- circuit breakers for power distribution (fitted with thermomagnetic or electronic trip units starting from 100 A)
- circuit breakers with adjustable magnetic only trip units for motor protection (MCP: Motor Control Protection)
- molded case switches for use as isolators or switching devices for lines, busbars or parts of a plant (MCS: Molded Case Switch) With the introduction of the new Tmax UL 347 VAC series, a single-pole circuit breaker with interrupting rating of 14 kA at 480 VAC is available on the American market for the first time.
4 8 0 V
All ABB circuit breakers in accordance with the UL 489 and CSA C22.2 Standard can be used in installations with wye or delta distribution systems since use of the circuit breaker at 480 V AC is guaranteed, even for the smallest Tmax T1 size.
ABB molded case circuit breakers ensure high performances in extremely small and compact dimensions. Standardization of the depth of the smaller sizes allows more rational and less deep enclosure to be used than in the past.
Thanks to the double insulation technique, with all ABB molded case circuit breakers* the electrical accessories can be mounted safely with the circuit breaker installed.
This allows considerable savings in time and therefore in costs.
* Except for Isomax S8.