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| | | FPX PROTECTION APPLICATIONS Protection of thyristors. Protection of gate turn-off thyristor (G.T.O.). Clamping (Secondary snubber). TECHNOLOGY Metallized polypropylene dielectric capacitor with controlled self-healing. Reinforced metallization developed for high impulse currents. Axial connections specially developed to reduce series inductance and to provide rigid mechanical mounting. PACKAGING Cylindrical in plastic case filled with thermosetting resin. Outputs: threaded inserts either M6 or M8. | | |
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| | | | | | | | | | ELECTRICAL CHARACTERI | | | | | Capacitance range Cn | 0.5uF to 6uF | | | | Tolerance on Cn | ±5% | | | | Rated DC voltage Vndc | 1000 to 3000 V | | | | Peak voltage Vpeak | 1600 to 4000 V | | | | Allowable overvoltage Vs (for 10 s/day) | 2000 to 4600 V | | | | Stray inductance | 5 to 20 nH | | | | RMS current | Irms max. = up to 160 A | | | | | The currents shown in the tables are maximum. | | | | | It is necessary to respect the thermal limits of the dielectric 85°C | | | | | see "Hot spot temperature calculation" | | | | Insulation resistance | RiX C > 30,000 s | | | | | | | | | |
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| | | Impulse current I2.t maxi. = up to 729 A2.s | | |
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| | | Spikes or peak currents in the capacitors may cause a deterioration of the bonding between the metallization and the connections. These bonds are capable of withstanding only a limited amount of energy for each spike. The table shows the maximum energy permitted in the form (I2.t), where I is in Ampere, and t is in seconds. | | |
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| | | Note: The formula (I2.t) replaces dV/dt which is less easy to use as it is not an expression of energy (I = C.dV/dt). This type of capacitor has been designed to withstand high (I2.t) values. | | |
| | | | | | | | | | | Variation of capacitance with temperature | ^C < ±2% | between -40 and 85°C | | | | Climatic category | 40/085/56 | (IEC 60068) | | | | Test voltage between terminals @ 25°C | Vs for 10s | | | | | Test voltage between terminals | | | | | | and case @ 25°C (Type test) | @ 4 kVrms | @ 50 Hz for 1 min. | | | | | | | | | | |
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| | | For higher power protection devices and further information please see PPX Series in Capacitor for High Power Electronics available on AVX website: www.avxcorp.com | | |
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