Molded-case circuit breakers
The ACW Series of molded-case circuit breakers disconnects power and provides circuit protection for low-voltage distribution systems against overloads and/or short circuits. UL489-certified, the circuit breakers are available in four different compact frames. Standard selection factors include: voltage and frequency rating, interrupting rating, continuous current rating, and accessories. In addition, the product is available in two levels of short circuit interrupting capacity — “P” for standard industrial and commercial applications and “W” for high-performance applications.
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Combination startersSquare D NEMA circuit breaker combination starters now feature PowerPact eMCP circuit breakers, which the company says protect higher amp flow and offer greater in-field flexibility. The upgraded starters also include 30-mm LED pilot lights and pliable “foam-in-place” cabinet seals that protect from harmful outside elements. Additional product highlights include a flexible fit that accommodates standard 9070TF control power transformers, door-mounted pilot device, and a redesigned operating mechanism and disconnect switch that allows users to reset the overload without special tools.
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The microEntelliGuard trip unit is now offered in the company’s Spectra SG600 and SK1200 circuit breakers, and is backward compatible with existing Spectra MicroVersa Trip breakers. Product features include a flexible time-current curve shaping, instantaneous Zone Selective Interlocking (ZSI), waveform capture and event log, and reduced energy let-through (RELT) for arc flash protection. In addition, the trip unit features a human machine interface that provides a backlit LCD display with 5-button tactile keypad and LED status, current metering, and an optional ground fault trip or alarm with multiple slopes.
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Miniature circuit breakers
The Eaton WMZT Series of miniature single-pole, 2-pole and triple-pole circuit breakers is available in sizes from 0.5A to 40A. According to the company, the circuit breakers feature a current-limiting design that provides fast short circuit interruption within one-half cycle of the fault. Available with C and D curve thermal magnetic overcurrent protection characteristics, the C-curve devices are suitable for applications where medium levels of inrush current are expected while the D-curve devices provide protection from nuisance tripping where high levels of inrush current are expected. The products are suitable for reverse-feed applications.