Resistor ZX15 series, open type, is applicable for the start, timing, braking and discharge in distribution system of 50Hz, 660V AC, 440V DC. The capacitor is up to 4.6kW, fixed by aludirome with rounded spiral tubular type resistor element. With shockproof and unbreakable advantages, it can take the place of Z1 series resistor. Features: 1) Altitude does not exceed 2,500m 2) The ambient temperature between -25  and +40, average temperature less than +35  during 24 hours 3) Relative humidity below 85%, between -5  and +20 4) Place free from serious pollution metal, insulation destroying, explosive, electric conductor dust and frequent violent vibration