Electrical Supplies
ACB
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- Schneider MasterPact MTZ air circuit breakers protecting systems up to 6300 A, with high short-circuit withstand and full selectivity. Micrologic electronic control units add power and energy metering, earth-fault and residual protection, and communication to the building management system through the breaker itself.
Application
Sit at the incomer and bus-tie positions of main LV switchboards in towers, hospitals, airports and industrial plant. What distinguishes an ACB at this level is short-time withstand: it can hold a fault current for a defined delay instead of tripping instantly, which is what lets everything downstream clear its own faults first and keeps the rest of the building live during a fault on one floor.
Standards & Reference 5 cited
IEC/EN 60947-1
The general rules underneath every piece of low-voltage switchgear and controlgear: definitions, ratings and the test conditions the product-specific parts build on.
IEC/EN 60947-2
Circuit breakers: breaking capacity, utilisation categories and the coordination behaviour a protection study depends on.
IEC 60529
The IP code. Two digits stating how well an enclosure keeps out solid objects and water, IP65 and the like. The number a specifier reads first when equipment sits outdoors or in a plant room.
Also citedIEC 61000-4 (EMC)IEC 61850
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