Always
O
n UPS Systems
M0703_NX_Series_Operators_Manual
V1.25
2012-06-12 8
3.6
Features and Advantages
a. Reliable input protection:
Circuit breakers are in each input loop to ensure power can
continue through the other loops in the event of a breaker trip caused by abnormal conditions
in either the rectifier or the load.
b. Input surge protection:
Input surge protection
is added at the input to provide enhanced
protection to both the UPS and the load and also protects against lightning effects and/or
surges caused by large cycling loads or those that are being turned on and/or off.
c. EMI suppression:
An
EMI filter is added to meet the international EMC limits to ensure that
No noise will effect or interfere with other equipment connected to the same AC source.
d. Ruggedness:
The rectifier employs phase control technology to regulate the DC bus
voltage allowing the batteries to be charged while supplying DC power to the inverter. This has
been proven to be the most efficient method to control and regulate the charge on the
batteries. The SCR technology and PFC circuit also assist in maintaining the input waveform.
e. High frequency design:
The inverter design incorporates high frequency, highly efficiency
Insulated Gate Bi-polar Transistors (IGBT). A PWM wave, synchronized to the bypass input,
triggers the IGBT’s, which invert the DC into AC power required by the loads. This design
decreases the number of required components, increases reliability and performance while
decreasing acoustic noise, size and weight.
f. True galvanic isolation:
The isolation transformer addresses ground differentials between
the input and output, and prevents ground leakage current problems, common mode and
normal mode noise. This transformer is located on the output side of the UPS system providing
isolation under every mode of operation.
g. PNP modular design:
The circuit boards are designed into several modules, which are
plugged into slots in the UPS. These plug-able modules allow for easy replacement in the field
when necessary and eliminate field diagnostics.
h. Cold start function:
The UPS can be started without the utility AC supply being activated.
Or present at the input terminal strip because our designed system is designed with current
limiting circuitry, which allows Startup of the UPS on battery DC power.
i. Multi-CPU design:
Several CPU’s are designed into the control circuit. These critical
functions are designed with multi-level redundancy increasing reliability and up-times by
eliminating field problems.
j. Protection against possible operator error:
The UPS is designed with breaker on/off
sensors and power supply sensors. These sensors prevent potential operational mistakes from
interfering with the start –up operation causing possible damage.
k. Wide input range:
The components are overrated by designed to handle high input
voltages and currents without harm to the system, ensuring that Always
O
n UPS’s remain one
of the most reliable UPS Systems available in today’s market.
l. Harsh environment:
Each component of the UPS is chosen with the highest degree of
safety margins allowing for wider environmental parameters and specifications related to
temperature, humidity, altitude, surge or noise.