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
- 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.
- Load Power Factor is not an issue. The 3060-MS will drive virtually any load without
damage or risk.
- 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
- 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.
- 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
- 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.
- 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.
- 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
- Power Levels Grow with demand. Units may be added or removed from the power grid
as required.
- 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).
- External Input is provided as a standard feature. This allows operation as a variable
frequency test power amplifier.
- 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
- Measures volts, amps, watts and kVA for each input and output phase.
- Efficiency is continuously monitored allowing system performance verification.
- Internal Diagnostics assist in quickly locating failed components resulting in extremely
low MTTR.
- 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.
- 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%.