WL-Series Capacitors

WL-Series Capacitors Family
  • WL-Series Capacitors

    NWL’s WL-Series are high energy capacitors used in pulse power and power conditioning applications. With welded metal cases of stainless steel, mild steel, aluminum, or brass, these robust oil-filled capacitors offer the highest energy stored per unit, typically 3-100 kJ. Large diameter, low profile bushings provide minimum inductance for fast discharge and high frequency response compared to Equivalent NWL WF-series capacitors with upright bushings. For maximum peak power, an available option is a 100 kVDC (under oil) bushing with a coaxial current return ring enabling the capacitor to have less than 40 nH of inductance and deliver up to a 250 kA repetitive peak pulse current.   Internal construction is customized for the application and both self-healing and non-self-healing versions are available.

    WL-Series capacitors are well suited for high energy storage and discharge in applications including:

    • High energy Marx generators
    • Pulsed magnetic field generators
    • EM forming and impact welding
    • Electromagnetic launchers and accelerators
    • EMP simulators
    • Pulsed X-ray generators
    • Lightning simulators
    • High energy physics experiments

    Unique features of the WL-Series capacitor include:

    • High voltage low profile terminals – With large diameter plastic insulators, this series of capacitors operates at high voltages while keeping resistance and inductance at a minimum.
    • Large welded metal packages – Utilizing well-established and proven vacuum-pressure impregnation processes, these fabricated and welded cases of stainless steel, mild steel, aluminum or brass are able to package capacitors ranging from tens of pounds to more than 500 lbs per unit.
    • Live case connection – For applications requiring minimal inductance, parallel-plate buswork requires low profile high voltage bushings and proximate or coaxial current return connections to the capacitor case. WL-Series offers threaded insert or screw high voltage terminals and either weldnuts or coaxial rings for case connections. A 100 kVdc, 250 kA bushing/terminal with coaxial current return ring is available. Weldnuts and/or brackets can be provided for mounting/securing.
    • Dead case – For applications requiring an isolated (typically grounded) case and two high voltage terminals at up to +/-50 kV, smaller diameter low profile bushings are available.
  • WL-Series Capacitors Product Information and Specifications

    WL-Series capacitors utilize a welded metal case oil-filled product with the latest technological advancements in polypropylene film dielectric systems.

    General Specifications

    Capacitance Tolerance +/- 10% standard, +/- 5% optional
    Voltages DC rating continuous steady state condition
    DC peak pulse duty, 0 – 100% reversal
    Current / Temp Ratings Ripple RMS current @ 40 ºC ambient
    Peak current @ 40 ºC ambient
    Inductance As low as 25 nH, depending on model
    Operating Temperature -40 to +65 ºC

    Electrical Ratings Overview

    Examples of typical ratings and packages shown above. Consult NWL for specific requirements and additional existing models.

    uF VDC Vpk Current Current Inductance Life(hours) Life(pulses) Dielectric Technology Case Size
    +/- 10% Continuous Pulse RMS @ 40¼C Peak nH Continuous VDC 20% Voltage Reversal L x W x H
    (inches)
    LOW PROFILE BUSHING(S)
    15800 1,400 2,800 150 75,000 400 1.3E+03 7.5E+05 Metfilm dead 7.00 x 16.00 x 24.00
    2000 4,500 5,000 200 30,000 250 1.0E+03 1.0E+06 Metfilm live 11.00 x 14.00 x 28.00
    500 8,400 10,000 75 100,000 tba 1.0E+05 4.4E+04 Metfilm live 13.25 x 13.25 x 24.00
    826 11,000 12,000 50 100,000 tba 2.0E+02 5.0E+03 Metfilm live 13.25 x 18.00 x 27.25
    1000 8,000 11,000 50 50,000 100 5.0E+01 2.0E+03 Metfilm live 11.50 x 16.00 x 23.00
    55 16,000 17,600 50 2,500 200 1.0E+05 1.0E+06 Metfilm live 7.00 x 14.00 x 16.00
    11.5 17,000 20,000 25 5,000 100 5.0E+04 2.5E+04 Metfilm live 8.50 x 13.50 x 7.00
    255 19,000 20,000 75 25,000 800 1.0E+04 2.5E+04 Metfilm dead 11.00 x 13.25 x 29.50
    20 19,000 25,000 50 5,000 60 1.0E+03 1.0E+05 Metfilm live 8.00 x 16.00 x 21.00
    70 19,000 25,000 100 50,000 60 1.0E+02 1.0E+04 Metfilm live 12.00 x 16.00 x 22.00
    100 18,000 20,000 75 4,000 250 1.0E+05 4.0E+06 Metfilm dead 11.00 x 13.25 x 22.50
    100 20,000 25,000 50 8,000 tba 1.0E+04 6.0E+07 Metfilm live 11.50 x 14.00 x 17.00
    200 12,500 15,000 75 4,000 500 1.0E+05 3.0E+07 Metfilm dead 11.00 x 14.00 x 29.50
    10 20,000 25,000 45 50,000 tba 1.0E+05 1.0E+06 Film / Foil dead 7.25 x 14.00 x 17.50
    5 25,000 30,000 45 50,000 tba 1.0E+05 2.0E+06 Film / Foil live 9.00 x 14.00 x 24.00
    10 25,000 30,000 45 50,000 tba 1.0E+05 1.0E+06 Film / Foil dead 9.00 x 14.00 x 24.00
    4.5 32,000 40,000 50 50,000 40 1.0E+04 3.0E+06 Film / Foil live 8.00 x 14.00 x 22.75
    27 36,000 44,000 75 100,000 50 1.0E+02 3.0E+03 Metfilm live 11.25 x 16.00 x 25.00
    3.12 35,000 40,000 50 40,000 75 1.0E+04 5.0E+05 Film / Foil dead 11.00 x 14.00 x 22.75
    2 50,000 60,000 50 30,000 tba 1.0E+04 1.0E+05 Film / Foil live 11.00 x 15.00 x 24.00
    2.2 50,000 60,000 50 75,000 60 1.0E+03 5.0E+04 Film / Foil live 10.50 x 12.00 x 25.00
    5 25,000 30,000 50 50,000 50 1.0E+02 1.0E+04 Film / Foil live 10.00 x 14.00 x 18.00
    6.25 55,000 66,000 75 80,000 70 1.0E+02 4.4E+04 Film / Foil live 12.00 x 17.75 x 23.00
    2 80,000 100,000 50 25,000 tba 2.0E+04 2.0E+04 Film / Foil live 11.00 x 15.00 x 24.00
    COAXIAL TERMINAL / CURRENT RETURN
    500 1,600 3,000 150 100,000 60 5.0E+04 5.0E+07 Film / Foil live 11.00 x 14.00 x 24.00
    8 30,000 35,000 50 60,000 30 1.0E+02 1.0E+04 Film / Foil live 11.00 x 12.00 x 15.00
    12.5 35,000 40,000 75 180,000 40 2.0E+02 2.5E+04 Film / Foil live 11.00 x 14.00 x 27.00
    52 36,000 44,000 75 150,000 70 2.5E+01 3.0E+03 Metfilm live 13.25 x 16.00 x 31.00
    2.2 80,000 100,000 50 250,000 70 2.0E+02 2.0E+04 Film / Foil live 11.00 x 14.00 x 25.00
    2.6 80,000 100,000 50 200,000 40 2.0E+02 2.0E+04 Film / Foil live 11.50 x 16.00 x 25.00
    WL-Series Low Profile Delrin Terminal Drawing WL-Series Low Profile Delrin Terminal WL-Series Coaxial Terminal / Current Return Drawing WL-Series Coaxial Terminal / Current Return