25 kW Regulated
DC Power Supplies
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|Models from 0 to 1 kV through 0 to 100 kV.
25kW models are 19.25"H x 24.0" D. Weight is only 120 lbs.
- 25 kW to 200 kW
- 1 kV to 100 kV
- Rack Mount
- CE Compliant
- RoHS Compliant
The GX family of power supplies are sophisticated,
25 kW through 200 kW, high voltage power supplies with low ripple and noise. They are air insulated fast response units with tight regulation and extremely low arc discharge currents.
Please refer to Technology > Applications page
on our web site for typical applications.
The GX Series, are fully compliant with the following European 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)
Input. 480 VAC 3 phase standard. 380 &
415 VAC optional.
Controls and Interface. Microcontroller based Front Panel Control and
Integral RS232/USB serial ports and optional Ethernet Interface.
High resolution voltage and current programming with either front panel digital
encoders or analog remote interface.
Constant Voltage/Constant Current Operation. Automatic crossover from
constant-voltage to constant-current regulation provides protection against
overloads, arcs, and short circuits.
Constant Current/Current Trip. A rear panel switch allows selection of
either current mode.
Arc Quench. The HV output is inhibited for a short period after
each load arc to quickly extinguish the arc.
Arc Count. Internal circuitry constantly
senses and integrates arcs that occur over a given time. In the event a system
or a 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 time interval.
Cooling. Forced air, enhanced reliability system with redundant thermal
overload protection including temperature sensing and fan speed monitor.
Parallel Operation. Master/Slave configuration up to 200kw. Please
consult the factory for additional details.
Last Setting Memory. The unit stores power supply parameters at each AC
turn off sequence. Stored parameter are: Output Voltage Setting and Output
Low Ripple. Ripple is typically less than 0.1% RMS of rated voltage at
Air Insulated. Air is the prime dielectric medium. No oil or
encapsulation is used to impede serviceability or increase weight.
Warranty. Standard power supplies are warranted for three years; OEM and
modified power supplies are warranted for one year. A formal warranty statement
The specifications herein apply from 5% to 100%
of rated voltage for a 25kW standalone power supply.
Input Rating: Standard 3 Phase, 480VAC (+/-) 10%, 48-63Hz, 35 kVA max,
less than 45 A RMS per phase. Inrush current is less than 50 A peak. A five
position terminal strip is provided for AC line connection. Mains service
must be protected with fuses or circuit breakers with a maximum rationg of 175 A
Efficiency: Typically > 80% at full load.
Output: Continuous, stable adjustment, from 0 to rated voltage or current
by panel mounted optical rotary encoder or by external 0 to +10V signals.
Voltage programming accuracy is 0.5% of setting + 0.2% of rated. Optical rotary
encoder resolution: 0.025% of rated with “Fine Adjustment” mode selected. 0.25%
of rated with “Coarse Adjustment” mode (default).
Line Regulation: Better than 0.01% of rating for +/-10% input variation,
Static Voltage Load Regulation: Better than 0.01% rating + TBD mV/A for
full load to no load variation.
Current Regulation: Better than 0.5% of the rating for short circuit to
rated output voltage variation, at any load condition.
Dynamic Voltage Regulation: Typical deviation is:
- 8 to100 kV: 2% of rating.
- 1 to 6 kV: TBD% of rating.
The recovery to within 1% of rating is 500 μs and within 0.1% in 1 ms for load
transients from 10% to 100% and 100% to 10%.
- 5kV to 100kV: Max. 0.1% of rated voltage at full load +1V RMS.
- 1kV to 3kV: Max. TBD% of rated voltage at full load +TBD V RMS.
Temperature Coefficient: Max. 100ppm per deg C following 30min warm up.
Stability: Max. 0.05% of rated over 8 hours’ time interval, following
30min warm up.
Voltage Rise Time Constant: Typical 200 ms for 8kV to 100kV models and
50ms for 1kV to 6kV models, using any HV enable.
Voltage Decay Time Constant: Decay time constant is function of the
applied load. The decay time constant will be equal to the rise time constant
with a minimum load of 5%.
Polarity: Available with either Positive or Negative polarity with
respect to chassis ground.
Parallel operation: Up to 8 units can be connected in parallel providing
active current sharing with dedicated master – slave configuration.
Analog Voltage Monitor: 0 to +10 V, equals 0 to rated voltage, with an
accuracy of .5% of reading + 0.2% of rated. Output impedance is 10kOhm.
Analog Current Monitor: 0 to +10 V, equals 0 to Rated current, with an
- 1 to 6kV: 1.5% of reading + .5% of rated.
- 8 to 100kV: 1% of reading + .5% of rated.
Output impedance is 10k ohm.
RS232/485 Programming and Monitor Accuracy:
Resolution: 0.025% of full scale for both the voltage and the current
Remote setting accuracy: Voltage setting accuracy is better than 0.5% of
setting + 0.2% of rated. Current setting accuracy is better than 0.5% of setting
+ 0.5% of rated.
Remote reading accuracy: Voltage reading accuracy is 0.5% of reading +
0.2% of rated. Current reading accuracy is:
- 1 to 6kV: 1.5% of reading + .5% of rated.
- 8 to 100kV: 1% of reading + .5% of rated.
High Voltage Interlock: An external contact, referenced to Common. It is
a “must make” contact for the output to be enabled. (Open = Output Off; Closed =
Output ON. The interlock is normally a latching function for the High Voltage ON
(HV ON) command. It defaults to a non-latching toggle function when the “NC”
option is selected or when the HV ON button on the front panel is bypassed for
the alternative remote command.
Current Limit: When the rear panel switch, S1, is set to CURRENT LIMIT
(CL), the power supply will limit and regulate the load current with automatic
crossover between voltage and current regulating modes.
Current Trip: When this switch is set to CURRENT TRIP (CT), the unit will
shut down and latch off when the load current equals or exceeds the programmed
Over Temperature: Shuts down and latches the unit in OFF state upon
exceeding the internally measured temperature threshold or sensing a defective
fan. The fault indicator will be activated.
Input Under Voltage: Will prevent
the Power Stage circuit from operating without all 3 line voltages active. When
this happens, the output will shut down and recovers automatically when the
normal input line condition is restored. The fault indicator will be activated
during the shutdown period.
DC Under Voltage (DCUV): Will prevent the Power Stage circuit from
operating with DC bus voltage below the operating level When this happens, the
output will shut down and recovers automatically when the normal input line
condition is restored. The fault indicator will be activated during the shutdown
Power Block Desaturation: The IGBT power block control has the capability to
sense an excessive current variation rate in its conduction state and turn off
the conversion cycle to avoid a shoot thru condition.
Arc Count: Internal circuitry senses the number of arcs caused by the
external load characteristics. If the rate of consecutive arcs exceeds
approximately 1 per second, for at least 5 arcs, the supply will turn off for
approximately 5 seconds to allow clearance of the faulty load condition.
Standard on 8 -100kV systems. Custom modifications of this feature are
available. Consult the factory.
Arc Quench: When an arc occurs, the output is inhibited for approximately
20ms to allow clearance of the fault. Standard on 8 – 100kV systems.
Front Panel Elements.
Output voltage display: 3.5 Digits.
Output current display: 3.5 Digits.
Current Mode Indicator: Green LED.
Voltage Mode Indicator: Green LED.
Fault Indicator: Red LED.
Fine Adjustment Indicator: Amber LED.
Preset Indicator: Amber LED.
Remote Program Indicator: Green LED.
Remote Enable Indicator: Green LED.
Polarity + Indicator: Green LED.
Polarity - Indicator: Green LED.
HV ON Indicator: Red LED.
HV OFF Indicator: Amber LED.
AC Power On lamp: Amber.
Switches (momentary): Remote Program, Remote Enable, Fine Adjustment,
Preset, HV ON, HV OFF.
Rotary Encoders: Voltage, Current, fine or coarse adjustments
AC Power Circuit Breaker
Rear Panel Elements.
DRIVER CHASSIS, MASTER/STAND ALONE: AC Power Terminal Block: Screw Terminal
with safety cover; GND stud; AC ON indicator; 15 pin “D” connector for HV
signals; 9 pin “D” connector for HV fans; 25 pin “D” connector for customer
interface; 3 pin Interlock terminal block; RS232/RJ45 connector; USB connector;
Ethernet Port (Optional); CL/CT switch; Four HVAC output connectors that connect
the driver to the HV Chassis, 15 pin “D” Slave Interface connector; 9 pin “D”
Slave Control connector.
DRIVER CHASSIS, SLAVE: AC Power Terminal Block: Screw Terminal with
safety cover; GND stud; AC ON indicator; 15 pin “D” connector for HV signals; 9
pin “D” connector for HV fans; 2 X 15 pin “D” Slave Interface connector; 2 X 9
pin “D” Slave Control connector; Four HVAC output connectors that connect the
driver to the HV Chassis.
HV CHASSIS: 4 x HVAC input connectors; ¼-20 GND return stud; 15 pin “D”
HV signal connector; 9 pin “D” HV fan connector; HV output connector.(See Model
Analog Customer Interface (Driver, Rear panel J3 connector)
Analog control signals: 0 to 10 V, Voltage Program and Monitor, Current
Program and Monitor and 10V Reference.
Logic Control Signals: Implemented with TTL compatible, 0 to 5.5 V CMOS,
positive logic circuitry.
HV ON RMT: implemented by a “Dry Contact” function. The momentary connection of
these pins will bypass the HV ON button on the front panel and turn the output
HV ENABLE input: Active in Remote Analog control. HIGH for HV Output Enable.
MODE STATUS indicator: LOW / HIGH indicates that output is in Current/ Voltage
FAULT indicator: Active HIGH, indicates a fault condition. The continuously
monitored faults are: Input under-voltage, DC under-voltage, Over Temperature,
Power Module and Fan failure.
HV STATUS indicator: LOW /HIGH indicates that Output is OFF/ ON.
Operating Temperature: 0 to +40 deg C, full load.
Operating Humidity: 30 – 90% RH (no condensation)
Storage Temperature: -20 to +70 deg C
Storage Humidity: 10 – 95 % RH (no condensation)
Altitude: For operation at Max. 5,000 ft.
Cooling: Forced air cooling with internal fans
Dimensions (W X H X D):
DRIVER 19” X 14” X 24”
HV CHASSIS 19” X 5.25” X 24”
Refer to the outline drawing.
Weight: 120lbs (55 kg)
Accessories: Accessories: Remote interface mating connector; detachable,
8 foot, shielded high voltage coaxial cable. (See Model Chart for cable type);
10’ null-modem RS232 cable; 10’ A/B –STD USB cable. Terminator Plug; Software
CD. All chassis interconnect cables are provided.
||3 Phase Input,
380VAC +/- 10%. The RMS rated current is less than 60A@345Vrms.
||3 Phase Input,
415VAC +/- 10%. The RMS rated current is less than 55A@375Vrms.
||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.
||For 1 to 6 kV models. Arc quench and arc
count are provided as described in specifications for 8 to 100 kV models.
||Blank front panel.
||0-5 V voltage and current program/monitor.
com port over ethernet network. Requires compatible OS (eg Windows).
|Please consult factory for special requirements.
Click on the model number below to request a quote and
for complete ordering part number.
50kW to 200kw Models: Multiply current
rating and stored energy in 25kw table above by number of parallel supplies.
For example. For 100kV at 75kW (1 master
2 slaves), multiply current and energy by 3. 750mA and 120J.
50 kW Models
Front and Side