FIM Products

Characteristics

ELECTRICAL CHARACTERISTICS FOR DC FILTERING

Capacitance C
n Nominal value of the capacitance. Working current I
rms r.m.s. value current for continuous operation. Maximum current I
max Maximum r.m.s. current for continuous operation. DC voltageContinuous voltage value.Rated DC voltage V
n Maximum operating peak voltage of either polarity (non-reversing type waveform), for which the capacitor has been designed for continuous operation.Working voltage V
w Value of the maximum operating recurrent voltage for a given hot spot temperature and expected lifetime. Ripple voltage V
r Peak-to-peak alternating component of the unidirectional voltage. Working frequency fRipple voltage frequency. Equivalent series resistance R
s An effective resistance which, if connected in series with an ideal capacitor of capacitance value equal to that of the capacitor in question, would have a power loss equal to active power dissipated in that capacitor under specified operating conditions. Stray inductance L
s Capacitor serial self-inductance.Tangent of loss angle tan δ Ratio between the equivalent series resistance and the capacitivereactance of a capacitor at a specified sinusoidal alternating voltage and frequency.Insulation voltage V
I r.m.s. rated value of the insulation voltage of capacitive elements and terminals to case.

THERMAL CHARACTERISTICS

Cooling air temperature θ
amb (°C):Temperature of the cooling air measured at the hottest position in the bank, understeady-state conditions, midway between two units. If only one is involved, it is the temperature measured at a point approximately x 0.1m away from the capacitor container and two-thirds of the height from its base. Hot spot temperature θ
HS (°C):Highest temperature obtained inside the case of the capacitor in thermal equilibrium. Operating temperature θ (°C):Temperature of the hottest point on the case of the capacitor in thermal equilibrium. Minimum operating temperature θ (°C):Lowest temperature of the case at which the capacitor may be energized. Maximum operating temperature θ
max (°C):Highest temperature of the case at which the capacitor may operate.

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