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http:// /docs/catalogs/hd-he.pdf Main Signal Application Series Type Size Finish Pulses High Energy Molded discs HP 30 Epoxy AC or DC Pulses with 40 potted AC AC Voltage Molded discs HD 30 Epoxy • The main applications include live line indicators, AC dividers, grading systems for power distribution network, protection for HV switches and power circuit breakers. Coupling, by-passing high frequency circuits also use HV • These applications require: - low or moderate losses at working frequencies (from The active power (or losses) being: Wa = 2ÃFC _ tg ä _ V2 = k (C_tg ä) (F_V2) This shows that improved performances are - Good dielectric properties (low tg ä) and - No long term overvoltage are present and - Capacitors free of “partial discharge†(corona) effect, up to rated rms voltage. TPC is able to perform “discharge free test†and may guarantee a rate as low as 5 picocoulombs at Vrms • High voltage capacitors for AC uses are mainly made of type II dielectrics. Most of these materials except strontium titanate exhibit a significant non-linearity. Consequently, the capacitance value depends on the voltage across the component and on the frequency of the applied signal. • Laser pulses circuitry, high energy/high voltage test equipment (HV accelerators, physics research) require products especially adapted to their specific requirements. • Because of the high energy involved, the design of the - a very low ESR (equivalent series resistance) to minimize - a very low ESL (equivalent series inductance) to keep Typically due to the design of the electrodes, the products - a high withstanding of very large dV even under high electric field, (implying that Ã¥r is very Through the use of almost linear or non-voltage dependent capacitors, the stored energy can reach 50 to 100 J/liter for the HP/HW products. • To ensure these properties, traditional ferroelectric type II capacitors cannot be used due to their electrostrictive and piezoelectric properties. The capacitors use quasi “paraelectricâ€, strontium-based, ceramic material. • The main applications are coupling, decoupling, multipliers circuits, HV DC power supplies, high voltage dividers. • Disc capacitor, type N4700 • Excellent capacitance vs voltage characteristic • Good behavior on frequency • AC voltage dividers at industrial frequency • High frequency coupling and decoupling • Other special HV applications • HD range: Molded type with fixtures M5 or M8 • HE range: uncoated type without fixtures TPC – Reference – Capacitance – Rated voltage • Delivery mode: bulk in carton box (25 pc/box) • Dielectric Type: N4700 class (see typical curves on page 8) Operating temperature range (ºC) -30/+85 Capacitance change with temperature (%) +22/-33 Typical dielectric constant at 0.25 kV/mm 1850 Insulation resistance (500V/20ºC) >10G Operating temperature range -30/+85ºC Rated voltage (VRMS/50Hz) 15 and 20 kVac Test voltage (VRMS/50Hz) 18 and 24 kVac Capacitance range 500 to 3000pF Dissipation factor WE GUARANTEE YOUR TOTAL SATISFACTION!! (Capacitor N4700 112M 15KV 709A was posted and is owned by: Isabel Craft) |
isabel_craft@chicagopartsnetwork.com (Isabel Craft) for more information.
