1600W front-end power supplies are for use in distributed, hot-pluggable and redundant
power systems. The HFE1600 series
operates off a universal ac input of from 85 to 265V ac, with active PFC, and
provides a well regulated dc output of 12, 24 or 48V. Operating efficiencies of
up to 92 percent are typical. With the 19 inch rack-mount enclosure as many as
five supplies can be paralleled with automatic load-sharing to provide up to
7600W of output power. A popular option is an integral MCU in each supply that
allows for remote programming, monitoring and status reporting via an isolated
I2C and PMBus interface.
And, an "energy-saving" feature of the I2C/PMBus
interface is that rack-mounted HFE1600 supplies can be individually turned on
or off as the total system load demand varies over time (aka "load-shedding").
The HFE1600 supplies,
each measuring 1.61 H x 3.35 W x 11.8 inch L, can be used individually or as
many as five can be mounted in an 1U-high 19 inch rack enclosure to form a
paralleled connected, load-sharing, hot-swap, N + M redundant 7.6 kW power
system. Should a fault occur, each supply has an internal ORing MOSFET switch
that will automatically disconnect it from the load and the other paralleled
supplies. Plus, alarm signals and LED indicators are provided to indentify a
faulty unit. For added power, up to two rack-mounted enclosures can be parallel
or series connected.
employing the HFE600-S1U rack-mount enclosure the dc outputs and current-share
lines of each plugged-in HFE1600 supply are automatically connected in parallel
with the others. In this way, scalable and expandable power is achieved, even
in the field. The rack assembly includes two sets of output bus bars, each of
which are rated at 200A, for a total of 400A per rack.
higher power applications, up to two power racks containing up to ten model
HFE1600 supplies can be zero-stacked (no space required between racks) and
connected in "parallel" for 15.2 kW of total output power in a compact 2U
vertical space. Likewise, up to two rack-mounted sets with five units each can
be connected in "series" for higher voltage requirements at up to 15.2 kW.
HFE1600 supply has two variable-speed cooling fans and can operate in temperatures
ranging from -10 to 70C. The airflow is directed from the front of each unit to
the rear where the I/O connector is located.
system monitoring, opto-isolated signals are provided including dc-OK, ac-Fail
and Over-Temperature. Front-panel mounted LED indicators provide a visual
status for dc-OK and ac-OK conditions. A remote On/Off control is also
standard, as well as remote-sense to compensate for voltage drops in the cables
that connect the supply outputs to the load. Other standard features include
single wire current-share and an auxiliary 12V/0.5A output that is diode ORed. Remote
programming of the output voltage and current can be accomplished via the I2C and PMBus interface, or
with an external 0-5V signal or a 1k ohm potentiometer.
The 19 inch rack mount enclosure
is available with ac inlets via IEC320-C16 connectors or terminal blocks for
each of the five power module slots. All units in the HFE1600
Series are fully RoHS-compliant, carry the CE mark and meet UL/EN60950-1 safety
specifications, as well as EN55022 and FCC level B EMC conducted specifications.
The radiated EMC performance complies with Level A requirements.
applications for the HFE1600 series include data centers, wireless base
stations, industrial automation, telecommunications, RF power amplifiers,
network equipment, storage systems and distributed power architectures.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.