Glassman High Voltage is a leading designer and manufacturer of High Voltage power supplies/DC power supplies for the High Voltage and Vacuum Process equipment market segments. A Glassman DC power supply can range in output from 15W-50kW with output voltages operating down to 50V thru 400kV.  A High Voltage power supply of this type can be offered in modular or Rack-mount configuration as well as special packaging to meet customer-specific mechanical requirements. Most Glassman DC power supplies are offered utilizing proprietary Air Insulation dielectric technology. Air poses numerous reliability and serviceability benefits in comparison to competing solid and liquid dielectric technologies.
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SH Series
8 kW to 40 kW Regulated
High Voltage
DC Power Supplies

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SH Series HV Power Supply
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
  • RoHS 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
2011/65/EU, Restriction of the use of Hazardous Substances (RoHS)

Features Specifications Options Models Outline


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 circuits.

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 voltage.

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 the factory.)

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 load.

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, 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. Circuit breaker, fuses, surge-limiting resistors, and low energy components provide ultimate protection.

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 regulating modes.

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.

HV Enable:
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 provided.


Symbol Description
ZR Zero start interlock. Voltage control, local or remote, must be at zero before HV will enable.
SS Slow start ramp. Specify standard times of 5, 10, 15, 20 or 30 Sec, 20%.
5VC 0-5 V voltage and current program/monitor.
NC 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.
ARC For 1 to 6 kV models. Arc quench and arc sensing are provided as described in specifications for 8 to 100 kV models.
GE9 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.

8kW Models

Stored Energy
SH1R8.0 0 - 1kV 0 - 8.0A 8 RG-8U
SH1.5R5.3 0 - 1.5kV 0 - 5.3A 7.8 RG-8U
SH2R4.0 0 - 2kV 0 - 4.0A 7.5 RG-8U
SH3R2.7 0 - 3kV 0 - 2.7A 8 RG-8U
SH5R1.6 0 - 5kV 0 - 1.6A 7 RG-8U
SH6R1.3 0 - 6kV 0 - 1.3A 8 RG-8U
SH8P1.0 SH8N1.0 SH8R1.0 0 - 8kV 0 -1000mA 10 RG-8U
SH10P800 SH10N800 SH10R800 0 - 10kV 0 - 800mA 12 RG-8U
SH12P670 SH12N670 SH12R670 0 - 12kV 0 - 670mA 12 RG-8U
SH15P530 SH15N530 SH15R530 0 - 15kV 0 - 530mA 10 RG-8U
SH20P400 SH20N400 SH20R400 0 - 20kV 0 - 400mA 18 RG-8U
SH25P320 SH25N320 SH25R320 0 - 25kV 0 - 320mA 13 RG-8U
SH30P270 SH30N270 SH30R270 0 - 30kV 0 - 270mA 18 RG-8U
SH40P200 SH40N200 SH40R200 0 - 40kV 0 - 200mA 16 RG-8U
SH50P160 SH50N160 SH50R160 0 - 50kV 0 - 160mA 20 RG-8U
SH60P130 SH60N130 SH60R130 0 - 60kV 0 - 130mA 24 RG-8U
SH70P110 SH70N110 SH70R110 0 - 70kV 0 - 110mA 28 DS2121
SH80P100 SH80N100 SH80R100 0 - 80kV 0 - 100mA 32 DS2121
SH100P80 SH100N80 SH100R80 0 - 100kV 0 - 80mA 40 DS2121

16kW Models

Stored Energy
SH1R16.0 0 - 1kV 0 - 16.0A 16 2X RG-8U
SH1.5R10.6 0 - 1.5kV 0 - 10.6A 15.6 2X RG-8U
SH2R8.0 0 - 2kV 0 - 8.0A 15 2X RG-8U
SH3R5.4 0 - 3kV 0 - 5.4A 16 2X RG-8U
SH5R3.2 0 - 5kV 0 - 3.2A 14 2X RG-8U
SH6R2.6 0 - 6kV 0 - 2.6A 16 2X RG-8U
SH8P2.0 SH8N2.0 SH8R2.0 0 - 8kV 0 - 2.0A 20 2X RG-8U
SH10P1.6 SH10N1.6 SH10R1.6 0 - 10kV 0 - 1.6A 24 2X RG-8U
SH12P1.3 SH12N1.3 SH12R1.3 0 - 12kV 0 - 1.3A 24 2X RG-8U
SH15P1.06 SH15N1.06 SH15R1.06 0 - 15kV 0 - 1060mA 20 2X RG-8U
SH20P800 SH20N800 SH20R800 0 - 20kV 0 - 800mA 36 2X RG-8U
SH25P640 SH25N640 SH25R640 0 - 25kV 0 - 640mA 26 2X RG-8U
SH30P540 SH30N540 SH30R540 0 - 30kV 0 - 540mA 36 2X RG-8U
SH40P400 SH40N400 SH40R400 0 - 40kV 0 - 400mA 32 2X RG-8U
SH50P320 SH50N320 SH50R320 0 - 50kV 0 - 320mA 40 2X RG-8U
SH60P260 SH60N260 SH60R260 0 - 60kV 0 - 260mA 48 2X RG-8U
SH70P220 SH70N220 SH70R220 0 - 70kV 0 - 220mA 56 2X DS2121
SH80P200 SH80N200 SH80R200 0 - 80kV 0 - 200mA 64 2X DS2121
SH100P160 SH100N160 SH100R160 0 - 100kV 0 - 160mA 80 2X DS2121

For Models Greater Than 16 kW, Please Consult Factory.

Outline Drawing

8kW Models

16kW Models