XP PowerOQ OpenStack Series
8 kW RegulatedHigh Voltage
DC Power Supplies
200 kV to 500 kV
CE Compliant
Parallelable up to40 kW
Fully RoHS
Compliant
The OQ open stack family are sophisticated 8kW power supplies with extremely low
ripple and noise. They are air insulated fast
response units with tight regulation
Please refer to Technology > Applications pageon our web site for typicalapplications.
The OQ Series are fully compliant with the following European Directives:• EN61010/ IEC61010, Safety• EN61000-6-4, Conducted and RadiatedEmissions• EN61000-6-2:2005, Conducted andRadiated Immunity• 2011/65/EU, Restriction of the use ofHazardous Substances (RoHS)
CE (Meets all applicable directives), UKCA
(Meets all applicable legislation)

Models from 0 to 200 kV through 0 to 500 kV. 8 kW system shown above (and bottomleft).
OQ open stack series models consist of a rack style driver chassis, a high voltage stackassembly, and a remote control unit. The driver chassis is provided in a cabinet which is10.86” H X 19.75” W X 25.06” D. The remote control unit is 5.218” H X 19.00” W X
6.625” D.

Features:
Arc Quench. The HV output is inhibited for a short period after each load arc
to help extinguish the arc.
Arc Count. Internal circuitry constantly senses and integrates arcs that occur
over a given time. In the event thata load arcing problem develops, thepower supply will cycle off, thenautomatically restart.
Embedded Microcontroller
Control. Integral RS-232, USB andoptional Ethernet communications provide remote control program and monitor.
Air Insulated. The OQ Series features “air” as the primary dielectric medium. No oil or encapsulation is used toimpede serviceability, or increase weight.
Input Voltage. 208 VAC standard. 380,
415 & 480 VAC optional
Low Ripple. Typically, ripple is lessthan 0.1% peak to peak of rated voltage
at full load.

www.xppower.com

Parallelable. One master supply andup to 4 slave supplies provide amaximum of 25 - 40 kW depending
on kV.
Pulse-Width Modulation. Off-theline pulse-width modulation provides highefficiency and a reduced parts count for
improved reliability.
Constant Voltage/ConstantCurrent Operation. Automaticcrossover from constant-voltage to constant-current regulation provides protection against overloads, arcs, and short circuits.
Constant Current/Current Trip.
A rear panel selector switch on the
remote chassis allows selection of either
current mode.
Tight Regulation. Voltage regulation
is better than 0.005% for allowable line
and load variations. Current regulation isbetter than 0.1% from short circuit torated voltage.
Warranty. All power supplies arewarranted for three years. A formal warranty statement is available..

102002-146OQ

D

17-Feb-20

XP Power

Specifications
Specifications apply from 5% to 100%
rated voltage. (Operation is guaranteed down to zero voltage with a slightdegradation of performance.)
Input: 187-228 V RMS, 3Ø, 48-63 Hz,
13 kVA maximum at full load. Less
than 40A/Ø at 208 VAC. A five position terminal block with protective
cover is provided. Mains service
must be protected with fuses or circuit breakers with a maximum rating of 125 A for 208 VAC models &100 A for 380 through 480 VAC
models.
Efficiency: Typically 80% at full load.
Output: Continuous stable adjustment from 0 to rated voltage or current by panel mounted 10-turn potentiometers with 0.05% resolution, or byexternal 0 to 10 V signals is provided.
Repeatability better than 0.1% of setting. Voltage accuracy is 0.5% of setting+ 0.2% of rated.
Static Voltage Regulation: Better
than +/- 0.005% for specified line variations and 0.005% for no load to fullload variations.
Current Regulation: Better than
0.1% from short circuit to rated voltage at any load condition, when in current regulation mode.
When in current trip mode the HV
output will disable and latch off when
the load current reaches the programmed current level. Reset isaccomplished by either cycling the ACpower or HV ON/OFF buttons or by
toggling the HV enable signal. A switch
located on the rear panel of theremote control chassis allows theselection of current limit or current
trip operation.
Voltage monitor: 0 to 10 V equivalent to 0 to rated voltage. Accuracy,
0.5% of reading + 0.2% of rated.
Impedance is 10 KΩ.
Current monitor: 0 to 10 V equivalent to 0 to rated current. Accuracy,
1% of reading + 0.1% of rated.
Impedance is 10 KΩ.
Stored Energy: Stored energy
varies with output voltage and is tabulated in the models chart.
Ripple: Ripple consists of two major
components, inverter switchingfrequency components and line
frequency related components. The

inverter frequency component isdependent on the amount of load current drawn. The line frequency relatedcomponent is determined by theamount of power delivered to theload. The maximum values for bothcomponents are specified in the models chart.
Stability: 0.01% per hour after 1/2
hour warm-up, 0.05% per 8 hours.
Voltage Rise/Decay Time
Constant: 400 ms typical using

either the HV ON switch or remote
programming with a minimum 4.8 mA
resistive load.
Temperature Coefficient:

0.01%/°C.

Ambient Temperature: -20 to+40° C, operating, -40 to +85° C storage.
Protection: Automatic current regulation protects against all overloads,
including arcs and short circuits.
Thermal switches and RPM sensing
fans protect against thermal overload.
Fuses, surge-limiting resistors and low
energy components provide ultimate
protection.
Arc Quench: An arc quench featureprovides sensing of each load arc andquickly inhibits the HV output for
approximately 0.25 seconds after eacharc.
Arc Count: Internal circuitry senses
the number of arcs caused byexternal load discharges. If therate of consecutive arcs exceeds
approximately one arc per second for5 arcs, the supply will turn off forapproximately 5 seconds to allow
clearance of the fault. After this period
the supply will automatically return tothe programmed kV value with the risetime constant indicated. If the load
fault still exists the above cycle will
repeat.
RS232/USB/Ethernet
Programming and MonitorAccuracy:
Resolution: 0.025% of full scale

for both the voltage and the current programs. 0.1% of full scale
for both the voltage and the current monitors.
Remote setting accuracy:

Voltage setting accuracy is better
than 0.5% of setting + 0.2% ofrated.

www.xppower.com

Remote reading accuracy:

Voltage reading accuracy is 0.5% ofreading + 0.2% of rated. Current
reading accuracy is 1%of reading + 0.1% of rated.
Remote Control Unit: A separate
control panel chassis is provided whichcontains all the control
functions.
The front panel of this assembly
contains: separate 10-turn controls
with locking vernier dials used to set
the voltage and current levels, High
Voltage ON switch, High voltage
OFF/Reset switch and an AC power
on/off switch and indicator. LED‘s indicate when the high voltage is on, output polarity, interlock status, fault status, and whether the supply is operating in a voltage or current
regulating mode. Output levels
are indicated by voltage and current
digital meters.
The rear panel of this assembly
contains: AC Power On indicator,
ground stud, driver/control chassis
interface connectors, current limit/current trip selector switch, remote userinterface connector and RS232/USBconnectors.
The signals provided on the remoteuser interface connector are as
follows:
Inputs: Output voltage and current
program signals, and high voltage
enable.
Outputs: Output voltage and current
monitor signals, a +10 V reference
source, a high voltage status signal, fault
status, and V/I mode status.
Signal common and ground reference
terminals are also provided.
Remote HV Enable: 0 - 1.5 V =OFF, 2.5 - 15 V = ON.
External Interlock: Open = off,closed = on. Latching with reset via
the HV ON switch. The front panel
indicator is illuminated when the interlock is open. Interlock connections areprovided on a terminal strip on therear panel of the driver chassis.
Accessories: 25 feet of detachable
interconnection cables, a 10 foot nullmodem cable, and a 10 foot USB cable
are provided.

XP Power

Options
Symbol Description
200
180-220 VRMS, 3Ø input, 48-63 Hz.
380342-440 VRMS, 3Ø input, 48-63 Hz.
415-50 370-460 VRMS, 3Ø input, 48-52 Hz.
480-60 430-530 VRMS, 3Ø input, 57-63 Hz.
ZRZero start Interlock. Voltage control, local or remote, must be zero before HV will enable.
SSSlow start ramp. Specify standard times of 5, 10, 15, 20, or 30 seconds + 20%.
5VC
0-5 V voltage and current program/monitor.
ETH
Virtual RS-232 COM port over Ethernet network. (Requires compatible OS (eg Windows) for COM drivers)
Please consult factory for special requirements.

8 kW Models
Positive
Polarity

Negative
Polarity

Reversible
Polarity

OutputVoltage

OutputCurrent

OQ200P40
OQ250P32
OQ300P25
OQ350P18
OQ400P14
OQ450P12
OQ500P10OQ200N40
OQ250N32
OQ300N25
OQ350N18OQ400N14OQ450N12OQ500N10OQ200R40OQ250R32
OQ300R25
OQ350R18OQ400R14OQ450R12OQ500R100-200 kV
0-250 kV
0-300 kV
0-350 kV
0-400 kV
0-450 kV
0-500 kV

0-40 mA
0-32 mA
0-25 mA
0-18 mA
0-14 mA
0-12 mA
0-10 mA

Max
StoredEnergy(J)
198232286
321375429464High
Freq.
Ripple
(P-P)
210
220
200
175
155
145
140

Line
Freq.
Ripple(P-P)
20202020202020Max
StoredEnergy(J)396464572642750858928

High
Freq.
Ripple(P-P)
210220200175155145140LineFreq.
Ripple(P-P)
2020202020202016 kW Models
Positive
Polarity

Negative
Polarity

Reversible
Polarity

OutputVoltage

OutputCurrent

OQ200P80
OQ250P64
OQ300P50
OQ350P36
OQ400P28
OQ450P24
OQ500P20

OQ200N80
OQ250N64
OQ300N50
OQ350N36
OQ400N28
OQ450N24
OQ500N20

OQ200R80
OQ250R64
OQ300R50
OQ350R36
OQ400R28
OQ450R24
OQ500R200-200 kV
0-250 kV
0-300 kV
0-350 kV
0-400 kV
0-450 kV
0-500 kV

0-80 mA
0-64 mA
0-50 mA
0-36 mA
0-28 mA
0-24 mA
0-20 mA

For Models Greater Than 16 kW, Please Consult Factory.

www.xppower.com

High Voltage Stack Assembly

www.xppower.com

Driver Assembly - MasterDriver Assembly - Slave

www.xppower.com

Remote Control Assembly

www.xppower.com

16 kW System

www.xppower.com