3 KW Regulated
DC Power Supplies
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0 to 2kV through 0
to 100kV, 7.0" H x 19" W x 24" D, 44 lbs.
|The KR Series
are fully compliant with the
following European Directives:
EN61010/ IEC61010, Safety
EN61000-6-4, Conducted and Radiated Emissions
EN61000-6-2: Conducted and Radiated Immunity.
- 2 to 100kV
- 7.0" Rack
- Power Factor
Corrected to 0.99
- Low Ripple and
- CE & Semi S2-93 Compliant
The KR Series of 3KW high voltage
supplies feature flexible embedded controls with low ripple and noise. They are
air insulated, fast response units, with tight regulation and extremely low arc
Please refer to
Technology > Applications page on our web site for typical applications.
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.
Embedded Microcontroller Control. Front
panel digital encoders provide high resolution local adjustment of voltage and
current program. Integral RS-232, USB and optional Ethernet communications
provide remote control program and monitor.
Low Ripple. Typically, ripple is less than 0.05% RMS of rated voltage at
Air Insulated. The KR Series features "air" as the
primary dielectric medium. No oil or encapsulation is used to impede serviceability or increase
Constant Voltage/Constant Current Operation. Automatic crossover
from constant-voltage to constant-current regulation provides protection against overloads, arcs, and
Redundant Thermal Overload Protection.
Thermostats and fan RPM sensing shut down the power supply due to over
temperature or reduced fan speeds.
Tight Regulation. Voltage regulation is better than 0.005% for
allowable line and 0.01% for allowable load variations. Current regulation is better than 0.1% from short circuit to
Constant Current/Current Trip. A rear
panel switch allows selection of either current mode.
Adjustable ramp time from 0 - 30 seconds. Output ramps from 0 V to programmed
Warranty. Standard power supplies are warranted for three
years; OEM and modified power supplies are warranted for one year. A formal warranty statement is
(Specifications apply from 5% to 100% rated
voltage. Operation is guaranteed down to zero voltage with a slight degradation
Input: 187 - 264 VAC continuous
single phase, 48-63 Hz. The RMS input current at rated power is less than 20 A
and inrush current is less than 35 A peak across the input line voltage
Efficiency: Typically greater than 85% at full load.
0.99 typical at full load.
Output: Continuous, stable adjustment,
from 0 to rated voltage or current by panel mounted optical rotary encoder or by
external +10V signals. Voltage accuracy is 0.5% of setting + 0.2% of rated.
Optical rotary encoder resolution: 0.025% with "Fine Adjustment" mode selected.
0.25% with "Coarse Adjustment" mode (default). Repeatability is < 0.1% of rated.
Static Voltage Regulation: Better than
±0.005% for specified line variations and 0.01% + 0.5 mV/mA for no load to full
Dynamic Voltage Regulation: For load
transients from 10% to 99% and 99% to 10%, typical deviation is less than 3% of
rated output voltage with recovery to within 1% in 500 us and recovery to within
0.1% in 1 ms.
Ripple: Better than 0.05% of rated
voltage + 1 V RMS at full load.
Current Regulation: When in current
regulation mode, better than 0.1% for 8-100 kV and better than 0.2% for 2-6 kV
from short circuit to rated voltage at any load condition.
Voltage Monitor: 0 to +10 V equivalent
to 0 to rated voltage. Accuracy: 0.5% of reading + 0.2% of rated. Impedance is
Current Monitor: 0 to +10 V equivalent
to 0 to rated current. Accuracy: 1% of reading + 0.1% of rated. Impedance is 10
Stability: 0.01% per hour after 1/2 hour
warm-up, 0.05% per 8 hours.
Voltage Rise/Decay Time Constant: The
voltage rise time constant is 50 ms typical for 2 to 20 kV models and 200 ms
typical for 25 to 100 kV models using either HV enable or remote programming
control. The voltage decay time constant is 50 ms with a 15% resistive load for
2 to 20 kV models and 200 ms with a 7.5% resistive load for 25 to 100 kV models.
Temperature Coefficient: 0.01% /°C.
Ambient Temperature: -20 to +40° C,
operating; -40 to +85° C, storage.
Polarity: Available with either positive, negative, or reversible
polarity with respect to chassis ground.
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.
An arc quench feature provides sensing of each load arc and quickly inhibits the
HV output for approximately 20 ms after each arc. Standard on 8 - 100 kV models;
optional on 2 - 6 kV models.
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
five 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. Standard on 8 - 100 kV models;
optional on 2 - 6 kV models.
Open = off, closed = on. Normally latching except for blank front panel version
where it is non-latching.
Remote HV Enable: 0-1.5 V off, 2.5-15 V on.
RS232/USB/Ethernet Programming and Monitor
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
Remote setting accuracy: Voltage setting accuracy is
better than 0.5% of setting + 0.2% of rated.
Remote Reading accuracy: Voltage reading accuracy is 0.5%
of reading + 0.2% of rated. Current reading accuracy is 1% of reading + 0.1% of
Front Panel Elements:
Output Voltage & Current Display: 3.5
Digit digital meters. 1250 count maximum.
Indicators: AC Power, Current Mode,
Voltage Mode, Pol +, Pol -, Fault, Fine Adjustment, Preset, Control Lock, Remote
Enable, Remote Program, HV On.
AC Power: Rocker switch
Switches (momentary): HV On, SS Slope,
Standby, Remote Enable, Remote Program, Preset, Fine Adjust, Control Lock.
Rotary Encoders: Voltage Adjust, Current
Rear Panel Elements: AC power entry
connector IEC 60320-C20 inlet, power on indicator, ground stud, HV output
connector, remote interface connector and RS232/USB connectors.
The signals provided on the remote interface connector are as follows:
Inputs: Safety interlock, output voltage and current
program signals, high voltage enable and remote HV on.
Outputs: Output voltage and current monitor signals,
HV status, fault status, I/V mode status and a +10 V reference source.
common and ground reference
terminals are also provided.
Accessories: Detachable, 8 foot,
shielded high voltage coaxial cable (see models chart for cable type), 6 foot
NEMA 6-20P line cord, 10 foot null modem cable and 10 foot USB cable are
Weight: Approximately 44 lbs.
input, 48 - 63 Hz. Derate output current by 10%.
||Blank front panel, power switch only.
||Zero start interlock. Voltage control, local or remote, must be at zero before HV will enable.
||0-5 V voltage and current
||Arc count and quench as
described in the specifications for 2 - 6 kV models.
||Arc Count Only.
||Arc Quench Only.
||Virtual RS-232 COM port over
Ethernet network. (Requires compatible OS (eg Windows) for COM drivers).
|Please consult factory for special requirements.
Click on the model number below to request a quote and
for complete ordering part number.