WR Series 250 Watt Regulated High Voltage DC Power Supplies	PDF Print Version HTML Print Version
Models from 0 to 85 kV through 0 to 125 kV.
Fully compliant with the European harmonized EMI directive, EN50082-2, and with the low voltage (safety) directive, 73/23/EEC.			Up to 125 kV 5.25 Inch Panel Height Laboratory Performance Enhanced Features

Constant Voltage/Constant Current Operation. Automatic crossover from voltage or current regulation modes is provided as dictated by load conditions.

Low Ripple. Ripple is less than 0.05% of rated voltage at full load.

Tight Regulation. Voltage regulation is better than 0.005%, line or load, and current regulation is better than 0.05% from short circuit to rated voltage.

Fast Transient Response. The supply responds to a 50% load transient in less than 3 milliseconds.

Front Panel Controls (Analog and Digital Versions.) Separate 10-turn controls with locking vernier dials are used to set voltage and current levels. A high voltage enable/disable switch and an AC power On/Off switch complete the panel controls. L.E.D.'s indicate when high voltage is on and whether the supply is operating in a voltage or current regulating mode. For the blank panel version, only a power On/Off switch is provided.

Remote Control Facilities. As standard, all WR Series supplies provide output voltage and current program/monitor terminals. TTL high voltage enable/disable, safety interlock terminals, and a +10 volt reference source.

Small Size and Weight. WR Series power supplies consume only 5.25 inches of panel height. Weight is 30 pounds typical.

Air Insulated. The WR Series features "air" as the primary 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 is available.

(From 5% to 100% rated voltage. All units operate down to zero output with very slight degradation of performance.)

Input: 105-125 V RMS, 48-63 Hz single phase, <6 A. Connector per IEC 320 with mating line cord.

Efficiency: Typically 85% at full load.

Output: Continuous, stable adjustment, from 0 to rated voltage or current by panel mounted 10-turn potentiometers with 0.05% resolution, or by external 0 to 10V signals is provided. Linearity is <1% of rated. Accuracy is 1% of rated + 1% of setting. Repeatability is <0.1% of rated.

Stored Energy: 11 joules, max.

Voltage Regulation: <0.005% line and load.

Ripple: <0.05% RMS of rated voltage at full load.

Current Regulation: <0.05% from short circuit to rated voltage at any set current.

Voltage Monitor: 0 to +10 V DC for zero to rated voltage. Accuracy, 1% of reading + 1% of rated voltage.

Current Monitor: 0 to +10 V DC for zero to rated current. Accuracy, 1% of reading + .05% of rated current.

Stability: 0.01% per hour after 1/2 hour warm-up, 0.05% per 8 hours.

Voltage Rise/Decay Time Constant: Typically 400 ms rise or decay time constant for 125 kV model, using HV on/off or remote voltage control, with 25% resistive load.

Temperature Coefficient: 0.01%/°C.

Ambient Temperature: -20 to +40°C operating, -40 to +85°C storage.

Polarity: Positive, negative, or reversible with respect to chassis ground.

Protection: Automatic current regulation protects against all overloads, including arcs and short circuits. Fuses, surge-limiting resistors, and low-energy components provide ultimate protection.

Accessories: Detachable 8-foot shielded HV Coaxial cable (see Model Chart for cable type) and 6-foot detachable line cord provided.

Remote controls: Common, +10 V reference, interlock, current monitor, current program, voltage monitor, voltage program, TTL, and ground, provided on a rear mounted terminal block.

External Interlock: Open off, closed on. Normally latching except for blank front panel version where it is non-latching.

HV Enable/Disable: 0-1.5 V off, 2.5-15 V on.

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