10 kW - 50 kW Regulated
DC Power Supplies
PDF Print Version
HTML Print Version
from 0 to 1 kV through 0 to 12 kV, 8.75 H x 19 W x 24.0 D, 60 lbs.
|The LQ family are
sophisticated, 10 kW, high voltage power supplies with low ripple and noise.
They are air insulated, fast response units, with tight regulation.
Please refer to Technology > Applications page on our web site for typical
The LQ Series are fully compliant with the following European Harmonized EMI
EN61010/ IEC61010, Safety
EN61000-6-4, Conducted and Radiated Emissions
EN61000-6-2:2005, Conducted and Radiated Immunity/EC.
- 1 kV to 12 kV
- Rack Mount
- CE Compliant
- Semi S2-93 Compliant
- Parallelable To 50
- 200, 380, 415 & 480
VAC input Options
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.
Low Ripple. Ripple is typically less than 0.1% RMS of rated voltage at
Air Insulated. The LQ Series features air as the primary
dielectric medium. No oil or encapsulation is used to impede serviceability or increase weight.
208 VAC standard. 380, 415 & 480 VAC optional.
One master supply and up to 4 slave supplies for a maximum of 50 kW.
Constant Voltage/Constant Current Operation. Automatic crossover
from constant-voltage to constant-current regulation provides protection against overloads, arcs, and
Constant Current/Current Trip. A rear panel switch allows
selection of either current mode.
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 0.05% for
allowable line variations and 0.05% for allowable load variations. Current regulation is better than 0.5% 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: 187 - 228 V RMS, three-phase, 48-63 Hz, 16.0 kVA maximum at full
load (less than 45 A/phase). Inrush current is less than 150 A. A five position
terminal strip is provided for AC line connection. 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 greater than 85% at full load.
Output: Continuous, stable adjustment from 0 to rated voltage/current by
means of panel-mounted 10-turn potentiometers (0.05% resolution), or external 0 to +10 V signals. Repeatability
better than 0.1% of setting.
Voltage programming accuracy: 1% of setting + 0.5% of rated output.
Resolution is a function of the programming method used.
Current programming accuracy: 1% of setting plus
1% of rated
Line Regulation: < +/- 0.05% of rated output for a +/-10% input line
Load Regulation: < +/- 0.05% of rated output for a no load to full
Ripple: < 0.1% +1V RMS of rated output voltage.
Current Regulation: Better than 0.5% from short circuit to rated voltage
at any load condition.
Voltage Monitor: 0 to +10 V equivalent to 0 to rated voltage. Accuracy:
1% of reading + 0.5% of rating. Output impedance is 10 K Ohm.
Current Monitor: 0 to +10 V equivalent to 0 to rated current. Accuracy:
1% of setting plus 1% of rated output. Output impedance is 10 K ohm.
Stability: 0.01% per hour after 1/2 hour warm-up, 0.05% per 8 hours.
Voltage Rise Time Constant: 50 ms typical, using either HV enable or
remote programming control.
Temperature Coefficient: 0.01%/° C.
Ambient Temperature: -20 to +40° C, operating; -40 to +85° C, storage.
Polarity: Available with either positive or negative polarity.
Protection: Automatic current regulation protects against all overloads,
including arcs and short circuits. Thermal switches and rpm sensing fans protect against thermal overload.
Circuit breaker, 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 20 ms 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 five
arcs, the supply will turn off for approximately five seconds to allow clearance of the fault. After this
period, the supply will return automatically to the programmed output voltage value with the voltage rise time
constant indicated. If the load fault still exists, the above cycle will be repeated.
Current Limit: In current limit mode the power supply will regulate the
load current at the programmed current level with automatic crossover between voltage and current regulating
Current Trip: A switch located on the rear of the control panel assembly
allows the selection of current limit or current trip operation. When the switch is set to 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, toggling the HV enable signal, or by pushing the HV off/reset and
then the HV on switches.
Front Panel Elements: The front panel contains all local control
functions and indicators. These are: AC power on/off circuit breaker and indicator light, separate
controls with locking vernier dials used to set voltage and current levels, high voltage on switch, and high
voltage off/reset switch. LED's indicate: when high voltage is on, output polarity, interlock, 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.
Rear Panel Elements: The rear panel contains the AC mains input
with safety cover, AC power indicator, HV output, ¼-20 ground return stud, CL/CT switch, 25 pin "D" interface
connector, and a 12 position terminal strip. The terminal strip provides local/remote signal selection, interlock,
and remote HV ON/OFF functions.
Remote Control Interface: All LQ family power supplies provide a
standard user's remote interface.
The signals provided are:
Inputs: Safety interlock, output voltage and current program signals,
high voltage enable and connections for remote HV on and off push buttons
Outputs: Output voltage and current monitor signals, HV enable status,
I/V regulation mode status, fault status, and a +10 V reference source. Signal common and ground reference
terminals are also provided.
Optional Analog Interfaces:
RS-232/USB computer interface (external add on assembly).
External Interlock: Open = off, closed = on. Normally latching except
for "NC" option supplies where it is non-latching. The interlock indicator LED is lit when the interlock
Remote Mode: 0 - 1.5 V = OFF, 2.5 - 15 V = ON.
Local Mode: The HV output is permanently enabled.
HV Status, Fault and I/V Regulation Status: Each are a set of form
"C" relay contacts.
Accessories: Detachable, 8 foot, shielded high voltage coaxial cable
is provided. A 25 pin D-subminiature connector for customer or computer interface is provided.
Regulatory: The system will meet the European conducted emission
standards as specified in 2004/108/EC and the European Low Voltage Directive,
Size: 8.75"H X 19"W X 24"D rack mounted chassis. Forced air cooling
||180 to 220 VRMS,
3-phase input, 48-63 Hz,derate output current by 10%.
||342 to 420 VRMS,
3-phase input, 48-63 Hz.
||360 to 440 VRMS,
3-phase input, 48-52 Hz.
||360 to 440 VRMS,
3-phase input, 57-63 Hz.
||370 to 460 VRMS,
3-phase input, 48-52 Hz.
||430 to 530 VRMS,
3-phase input, 57-63 Hz.
panel, AC power breaker/switch and indicator only.
interlock. Voltage control, local or remote, must be at zero before HV
||Slow start ramp.
Specify standard times of 5, 10, 15, 20 or 30 Sec, ±20%.
||0-5 V voltage and
||RS-232 control and monitor.
|Please consult factory for special requirements.
Click on the model number below to request a quote and
for complete ordering part number.
For Models Greater Than 20 kW, Please