Description
SH Series
Up to 100kV Regulated High Voltage DC Power Supplies
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
Specifications
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
- Polarity:Available with either Positive, Negative, or Reversible polarity with respect to chassis ground.
- Ambient Temperature: -20 to +40° C, operating; -40 to +85° C, storage
Features
- 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.
- Constant Voltage/Constant Current Operation: Automatic crossover from constant-voltage to constant-current regulation provides protection against overloads, arcs, and short circuits.
- 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
- Tight Regulation: Voltage regulation is better than 0.01% for allowable line and 0.01% for allowable load variations. Current regulation is better than 0.1% from short circuit to rated voltage.
- Redundant Thermal Overload Protection: Thermostats and tachometer fan RPM sensing
shut down the power supply due to over temperature or reduced fan speeds.
- 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.
