Maximize Performance and Versatility and
Virtually Eliminate Downtime
Pacific’s unique master/slave configuration allows up to ten 62.5 kVA mainframes
to be paralleled in the field. Any mainframe may be designated as the master. A
failed unit is automatically disconnected from the power grid providing
unmatched mission reliability.
Pacific’s MS-Series Power Source Systems Feature
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Maximum system reliability
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Rugged, powerful output
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Lower installation cost
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All frequency operation
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Lower maintenance cost
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Facility/test power flexibility
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Unmatched performance/price ratio
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Simple display and diagnostics
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Uninterruptible Power Source configuration (UMS Option) readily available
True Advantages
Solid State Technology with Unmatched Price/Performance Ratio
Pacific MS-Series is a family of High Performance Line Conditioners/Frequency
Converters that provides highly flexible, yet reliable, AC power ranging from
62.5 to 625 kVA. Using field-proven double conversion methods, the MS-Series
offers unmatched power quality without sacrificing size or efficiency.
Input AC power is rectified to DC by a special input power supply section. This
minimizes input current distortion and prevents the load power factor from
reflecting back onto the utility line. The DC is then converted back to AC by a
high frequency, solid state, pulse-width modulated switchmode inverter under
the control of a highly stable digital oscillator. The result is exceptional
system performance with maximum reliability.
Rugged, Powerful Output
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350 Amps of Pulse Current is delivered by each 3060-MS for driving non-linear
loads.This eliminates the need to oversize power equirements as is common to
rotary or low quality PWM power systems.
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Load Power Factor is not an issue. The 3060-MS will drive virtually any load
without damage or risk.
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Excellent Regulation and response time eliminates load cross talk. Voltage sags
common to other conversion methods are eliminated with 150 microsecond response
time to a 50% load step. The output recovers to ± 3% of nominal within less
than 1/10th of a cycle at 400 Hz.
Maximum Reliability
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Each 3060-MS is capable of operating as either the master or slave in a
multi-cabinet parallel system. Calculated single cabinet MTBF is greater than
five years.
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Mission Reliability is assured. The parallel system architecture is such that a
failed slave unit automatically removes itself from the power grid. Should the
master unit fail, the operator can select any other paralleled unit as the new
master from the front panel and restore system operation.
Low Cost Ownership
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Lower Maintenance Costs are achieved through built-in diagnostics that minimize
MTTR. Quick and easy repair is facilitated with a small complement of local
spares.
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Input Power Factor is a constant 0.95 lagging, regardless of load. The MS
Series actually corrects PF reflected back to the utility, eliminating PF
penalties.
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Low Installation Cost. The MS Series fits through standard doorways. Audible
noise is limited to cooling fans. There is no 400 Hz whine that requires noise
isolation. Solid state design with a forklift base eliminates the need for
concrete pads and vibration isolators common to rotary installations.
Facility/Test Power Flexibility
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Power Levels Grow with demand. Units may be added or removed from the power
grid as required.
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Variable Frequency range of 47-500 Hz, as well as switch selectable fixed
frequency operation of 50, 60 or 400 Hz is standard on every model (800Hz
optional contact factory for more information).
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External Input is provided as a standard feature. This allows operation as a
variable frequency test power amplifier.
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UPC-32 Programmable Controller Option is available to provide steady state and
transient control of output power from the RS-232 or GPIB bus. Compatibility with UPC Studio graphical user interface.
Simple/Informative Display
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Measures volts, amps, watts and kVA for each input and output phase.
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Efficiency is continuously monitored allowing system performance verification.
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Internal Diagnostics assist in quickly locating failed components resulting in
extremely low MTTR.
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Power Generation circuits are separate from display and diagnostics. A failure
in the display logic will not affect output power quality. Output power cannot
be interrupted by system interrogation.
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Audible and Visual Alarms alert the operator to any conditions requiring
attention.
The 3060-MS Delivers High Quality AC Power for all Applications
Electrical Specifications
Output
Power:
62.5kVA/50kW for each 3060-MS.
Voltage:
0-120/208, 3 phase. May be loaded either WYE or Delta. Other voltages are
available as an option.
Current:
175 Arms per phase continuous. 350Apk per phase for non-linear loads.
Load Transient Response and Recovery Time:
150 microseconds for 50% load step and 300 microseconds for 100% load step.
Load Power Factor:
Any. Unit delivers full rated kVA into any power factor.
Load Balance Restrictions:
None. Each phase is independently regulated.
Isolation:
Input is fully isolated from output and frame ground.
Protection:
Integral electronic current limiting with auto recovery. Output CB optional.
Input
Voltage:
Universal input transformer with provisions for 208, 240, 380 and 480VAC, 3
phase + 10%.
Frequency:
47-63 Hz.
Physical Specifications
Size:
36"W x 30"D x 72"H (see diagram).
Weight:
1600 lbs., Approximately 1700 lbs. shipping weight.
Efficiency:
85 to 90%.
Additional Features
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Run time meter.
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Auto restart.
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RS-232 serial port for remote monitoring and diagnostics.
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Programmable voltage & frequency alarm set points.
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Local automatic gain control. Remote sense optional.
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ETL Listing (optional on standard MS-Series cabinet only).
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CE Mark (optional on standard MS-Series cabinet).
UMS Option
MS Series Battery Support Systems
The battery support system for a single cabinet UMS installation (62.5kVA, 50kW)
consists of 30 sealed, maintenance free, immobilized electrolyte, batteries
installed in an open battery rack. The UMS system DC voltage regulator provides
for automatic charging of the battery system to maintain the proper float
voltage.
A battery disconnect center is located on the end of the battery rack.
Battery support time at full load (50kW) is approximately 15 minutes. The
waveform quality at the end of the battery support time meets the requirements
of MIL-STD 1399, section 300A, Types I, II and III power forms.
On-Line, No-Risk Battery Test
This feature of the UMS system provides the ability to perform a battery test on
command from the front panel or RS-232 serial port. Test results are displayed
on the front panel and are available over the serial port as a part of the
system diagnostics. A battery failure during the test will not cause the system
to drop the load or distort the output waveform.
Call for Technical and Application Assistance
Pacific’s technical people are committed to assist you. As a technically
oriented company, we design, manufacture and service leading edge AC Test Power
equipment. We understand your requirement for strong applications support and
we provide it.
Product Brochure and Application Notes
To receive a PDF brochure and/or application notes for this product, please
contact us and check the boxes of the specific product(s) that you are
interested in or login in to the PPS Member area and download the files.
Specifications are subject to change without notice.
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