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MX28B-1200+27V PRODUCT MANUAL

5.8.2Installation of Circuit Breakers

1)Remove the metal circuit breaker cover panels.

2)Use diagonal cutters to cut the metal web of the breaker panel “knock-outs” at the desired breaker locations.

3)Install the circuit breaker(s) by snapping the top terminal onto the upper bus bar and rotating the unit down until the second terminal snaps onto the breaker termination post as shown in Figure 5-8. The breaker alarm terminals are designed to make contact with the alarm terminal board as the breaker is snapped into place.

NOTE: Circuit breaker alarm contacts close when the circuit breaker is tripped but not when it is turned OFF.

***** CAUTION *****

During circuit breaker installation, carefully align the breaker alarm terminals with the alarm terminal board to avoid breaker terminal damage.

4) Reattach the circuit breaker cover panels.

Figure 5-8 Plug-in Circuit Breaker Insertion

5.8.2.124V Circuit Breaker Load Connections

Connections for the +24V DC loads are located directly above the corresponding breaker. A typical load connection would utilize a #6 AWG wire with a two-hole lug on 5/8-inch centers, attached with standard #10-32 mounting screws.

The load return cables for each circuit breaker section connect to the return bus directly above the top row of circuit breakers. These return buses contain patterns for 40 two-hole #10-32 lugs on 5/8-inch centers.

5.8.2.2–48V Circuit Breaker Load Connections

Connections for the –48V DC loads are made directly above the corresponding breaker. A typical load connection would utilize a #6 AWG wire with a two-hole lug on 5/8-inch centers, attached with standard #10-32 mounting screws.

The load return cables for each circuit breaker section connect to the return bus located above the upper circuit breakers.

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American Power Conversion MX28B1200 manual Installation of Circuit Breakers, 2.2 -48V Circuit Breaker Load Connections
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MX28B2400+27V, MX28B1200 specifications

The American Power Conversion (APC) MX28B1200 and MX28B2400+27V are advanced power management solutions designed to deliver superior reliability and performance for critical applications. These models are an integral part of APC’s extensive range of uninterruptible power supplies (UPS), catering specifically to high-performance environments such as data centers, server rooms, and industrial systems.

One of the standout features of the MX28 models is their robust power output capability. The MX28B1200 offers a 1200VA power rating, while the MX28B2400+27V boasts a substantial 2400VA rating. This impressive output ensures that connected equipment remains operational during power outages, providing essential backup support and minimizing downtime.

Another key characteristic is their advanced battery management technology, which incorporates intelligent charging systems to extend battery life and improve overall efficiency. This technology helps optimize the charging process, ensuring that the batteries are always in top condition and ready to supply power when needed.

The MX28B series also integrates smart LCD displays that provide real-time information on power conditions, battery status, and system performance. This user-friendly interface allows administrators to monitor the UPS at a glance, facilitating easier management and quicker response times in case of any issues.

In addition to reliable power delivery, the MX28 models emphasize scalability and flexibility. They are designed to support a variety of configurations and are compatible with a range of external battery packs. This ability to adapt means businesses can expand their power capabilities without overhauling their existing systems.

Furthermore, the MX28B series includes advanced protection features against power surges, voltage fluctuations, and other electrical disturbances. This ensures the safety of connected devices, safeguarding against potential damages and enhancing the overall integrity of critical operations.

The design of the APC MX28 models prioritizes efficiency, compliance with global energy standards, and reduced operational costs. This focus on efficiency not only leads to savings but also aligns with sustainable practices, making them an ideal choice for environmentally conscious organizations.

Overall, the APC MX28B1200 and MX28B2400+27V represent a significant advancement in UPS technology, combining power reliability, intelligent management, and environmentally friendly design to support a wide array of demanding applications across various industries.
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