2 kW Regulated
DC Power Supplies
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|Models from 0-200 kV through 0-450 kV.
|The OS Series are fully
compliant with the following European Harmonized EMI Directives:
• EN61010/ IEC61010, Safety
• EN61000-6-4, Conducted and Radiated Emissions
• EN61000-6-2:2005, Conducted and Radiated Immunity
• 2011/65/EU, Restriction of the use of Hazardous Substances (RoHS)
- 200 kV to 450 kV, Open Stack CE Compliant
- Power Factor Corrected to > .995
- Harmonics Well Below EN61000-3-2
- RoHS Compliant
The OS family of power supplies are sophisticated 2 kW, open stack, power
supplies with extremely low ripple and noise. They are air insulated fast response units with tight
regulation. They are designed to meet the growing demands from both users and electric utilities for
switching supplies with excellent input power factors that draw harmonic currents below those specified
Please refer to
Technology > Applications page on our web site for typical applications.
OS series models consist of a rack style driver chassis, a high voltage
stack assembly, and a remote control unit. The driver chassis is provided in a cabinet which is 8.43" H
X 22.56" D, onto which the high voltage stack is mounted. The dimensions of the stack vary with the output
voltage rating and are given in the specifications. The rack mountable remote control provides all
interface functions and is connected to the driver chassis with the 25 ft. long cables provided. The
remote control unit is 5.25" H X 5.0" D.
Power Factor Corrected. Active correction circuitry achieves an input
line current harmonic content well below the maximum specified in EN61000-3-2.
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 a system or load arcing problem develops and exceeds factory-set
parameters, the power supply will cycle off in an attempt to clear the fault and then automatically restart
after a preset "off dwell time".
Pulse-Width Modulation. Off-the-line pulse-width modulation provides
high efficiency and a reduced parts count for improved reliability.
Air Insulated. The OS Series features "air" as the primary dielectric
medium. No oil or encapsulation is used to impede serviceability or increase weight.
Constant Voltage/Constant Current Operation. Automatic crossover from
constant-voltage to constant-current regulation provides protection against overloads, arcs, and short circuits.
Current Trip. This feature may be substituted for constant-current
operation by a remote control chassis rear panel selector switch.
Low Ripple. Typically, ripple is less than 0.05% peak to peak of rated
voltage at full load.
Tight Regulation. Voltage regulation is better than 0.005% for allowable
line and load variations. Current regulation is better than 0.1% from short circuit to rated voltage.
Warranty. Standard power supplies are warranted for three years; OEM
and modified power supplies are warranted for one year. A formal warranty statement is available.
(Specifications apply from 5% to 100% rated voltage. Operation is guaranteed
down to zero voltage with a slight degradation of performance.)
Input: 198-264 V RMS single phase, 48-63 Hz, 2500 VA maximum at full
load. A three position terminal block with protective cover is provided on the rear panel of the driver chassis.
Efficiency: Typically 80% at full load. Power factor >0.995.
Output: Continuous stable adjustment from 0 to rated voltage or current
by panel mounted 10-turn potentiometers with 0.05% resolution, or by external 0 to 10 V signals is provided.
Repeatability better than 0.1% of setting. Accuracy is 0.5% of setting + 0.2%
Voltage Regulation: Better than +/- 0.005% for specified line variations
and 0.005% for no load to full load variations.
Current Regulation: Better than +/- 0.005% for specified line variations
and 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 is accomplished by either cycling the AC power or HV ON/OFF buttons or by toggling the HV enable
signal. A switch located on the rear panel of the remote control chassis allows the selection 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 K Ohm.
Current monitor: 0 to 10 V equivalent to 0 to rated current. Accuracy,
1% of reading + 0.05% of rated. Reverse polarity models: 1% of reading + 0.1% of
rated. Impedance is 10 K Ohm.
Stored Energy: Stored energy varies with output voltage and is tabulated
in the models chart.
Ripple: Ripple consists of two major components, inverter switching
frequency components and line frequency related components. The inverter frequency component is dependent on
the amount of load current drawn. The line frequency related component is determined by the amount of power
delivered to the load. The maximum values for both components 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 1.7 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 protect against thermal overload. Fuses, surge-limiting
resistors and low energy components provide ultimate protection.
Arc Quench: An arc quench feature provides sensing of each load arc and
quickly inhibits the HV output for approximately 0.25 seconds after each arc.
Arc Count: Internal circuitry senses the number of arcs caused by
external load discharges. If the rate of consecutive arcs exceeds approximately one arc per second for 5 arcs,
the supply will turn off for approximately 5 seconds to allow clearance of the fault. After this period the
supply will automatically return to the programmed kV value with the rise time constant indicated. If the
load fault still exists the above cycle will repeat.
Remote Control Unit: A separate control panel chassis is provided which
contains 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 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, and remote
user interface terminal strip. The signals provided on the remote user interface terminal strip 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, and a high voltage status signal.
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 or HV enable signal. The front panel indicator is illuminated when the interlock is open.
Interlock connections are provided on a terminal strip on the rear panel of the driver chassis.
HV Status: TTL level signal. High = HV On, low = HV Off.
Accessories: 25 feet of detachable interconnection cables are provided.
||Zero start interlock. Voltage control, local or remote, must be at zero before HV will enable.
||Slow start ramp. Specify standard times of 5, 10 ,15, 20 or 30 Sec, ±20%.
||0-5 V voltage and current program/monitor.
||180 - 220 VAC input 48 - 63 Hz. Derate output current by 10%.
||RS-232 control and monitor.
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for complete ordering part number.