8 kW to 40 kW Regulated
DC Power Supplies
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|Models from 0 to 1 kV through 0 to 100 kV. 8kW models are 17.5"H x 24.0" D. Weight is only 110 lbs.
- 8kW to 40kW
- 1 kV to 100 kV
- Rack Mount
- CE and Semi S2-93 Compliant
The SH family of power supplies are sophisticated, 8 kW through 40 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 SH 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
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 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 SH 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
Current Trip. This feature may be substituted for constant-current
operation by a rear panel selector switch.
Redundant Thermal Overload Protection. Thermostats and tachometer
fan RPM sensing shut down the power supply due to over temperature or reduced fan speeds.
Low Ripple. Typically, ripple is less than 0.025% rms of rated
voltage at full load.
Tight Regulation. Voltage regulation is typically better than 0.01%
for allowable line and load variations. Current regulation is better than 0.1% from short circuit to rated
Higher Power Capability. Power supply modules can be paralleled up
to 40 kW output power utilizing one master control module and up to four slave modules.
Differentially Coupled Analog Control Signals. All voltage and
current programming and monitoring signalsare coupled to the user interface by true differential amplifiers.
This provides for the ability to return the program and monitor commons to ground or system common at the
source. This arrangement isolates the return wires and eliminates errors due to unwanted return currents
flowing in these connections.
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 for 8 kW Power Supplies
(Specifications apply from 5% to 100% of rated voltage. Operation is
guaranteed down to zero with a slight degradation of performance.)
(For 16 kW power supplies, unless otherwise indicated, the performance
specification limits could be increased by a factor of up to 30%. For power supplies over 16 kW consult
Input: 187-228 V rms, three-phase, 48-63 Hz, 12,000 VA maximum at
full load (less than 35 A per phase). Inrush current is less than 45 A with a nominal decay time constant
of 60 ms. Four 10-32 studs for AC line connection with a safety cover and strain relief are provided. For
systems 16 kW and greater, a separate AC input connection is required for each additional slave chassis.
Mains service must be protected with fuses or circuit breakers with a maximum rating of 125 A.
Efficiency: Typically 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: 0.5% of
setting + 0.2% of rated output. Resolution is a function of the programming
method used. Voltage and current external programming are differentially coupled
with a maximum common mode voltage of ±3 VDC..
Voltage Regulation: Better than ±0.005%
for specified line variations and 0.01% + 10 mV/A for no load to full load
variations. For 80 to 100 kV models, V-Load regulation is 0.025%.
Current Regulation: From short circuit
to rated voltage at any load condition: 1 kV to 6 kV: Better than 0.5%. 8 kV to
100 kV: Better than 0.2%
Voltage Monitor: 0 to +10 V equivalent to 0 to rated voltage.
Accuracy: 0.5% of reading + 0.2% of rating. Output impedance is 10 kΩ, differentially coupled.
Current Monitor: 0 to +10 V equivalent
to 0 to rated current. Accuracy: 1 kV to 6 kV: 1.5% of reading plus 0.5% of
rated output. 8 kV to 100 kV: 1% of reading plus 0.2% of rated output. Output
impedance is 10 kΩ, differentially coupled.
Ripple: Better than 0.025% of rated voltage +1 V RMS at full
Stored Energy: See Models chart.
Stability: 0.01% per hour after 1/2 hour warm-up, 0.05% per 8 hours.
Voltage Rise Time Constant: 200 ms for 8 kV to 100 kV models
and 50 ms for 1 kV to 6 kV models typical, using either HV enable or remote programming control.
Voltage Decay time constant: Decay time constant is a function
of the applied load. The decay time constant will be equal to the rise time constant with a minimum load
of 5% of rated maximum.
Temperature Coefficient: 0.01%/° C.
Ambient Temperature: -20 to +40° C, operating; -40 to +85° C,
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. Circuit breaker, fuses, surge-limiting resistors, and low energy components provide
Arc Quench. Optional on models 1 kV through 6 kV; standard on
models 8 kV through 100 kV. 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. Optional on models 1 kV through 6 kV; standard on
models 8 kV through 100 kV. 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
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 remote/local selector switches. These control functions are: AC power on/off circuit
breaker and indicator light, separate 10-turn 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.
Remote/local switches are provided for voltage and current programming and HV on/off functions.
Slave Front Panel Elements. (When applicable). AC power breaker/switch
and indicator. Bias, tracking (over voltage), and thermal overload/low fan speed indicators. Slave current and
voltage service test points.
Remote Control Interface. All standard SH family power supplies
provide a 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 pushbuttons.
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. Toggle switches on the rear of the control chassis select either current limit
or current trip operation and local or remote HV enable.
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 is open.
Remote Mode: 0 - 1.5 V = OFF,2.5 - 15 V = ON.
Local Mode: The HV output is permanently enabled. HV Enable, Fault and I/V Regulation Status: Each
are a set of form "C" relay contacts.
Accessories: Detachable, 8 foot, shielded high voltage coaxial
cable provided. Models 16 kW and above are provided with an additional HV cable per slave module. A 25
pin D-subminiature connector for customer interface is provided. All chassis interconnection cables are
||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.
||Blank front panel. Panel contains AC power breaker/switch and indicator, HV ON, HV OFF, interlock and fault indicators, and output current and voltage service test points.
||For 1 to 6 kV models. Arc quench and arc sensing are provided as described in specifications for 8 to 100 kV models.
||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 16 kW, Please Consult Factory.