3TC直流接触器用在高海拔时的降容系数

以下额定值适用于最大环境温度为40°C。

海拔至2500m

- Reduction of rated insulation voltage to 0,93 x Ui
- Reduction of load current to 0,93 x Ie
- Setting of load current in thermally delayed overcurrent protection devices to 1,02 x Ie
- Short-circuit breaking capacities Icu and Ics: 90 % of normal value at sea level
- Reduction of the working range of the coil to 0.80-1.08
- Switching frequency Catalogue value No restriction
- Reduction of the rated insulation impulse voltage to Uimp 93%.

海拔至3000m

- Reduction of rated insulation ivoltage to 0,88 x Ui
- Reduction of load current to 0,88 x Ie
- Setting of load current in thermally delayed overcurrent protection devices to 1,05 x Ie
- Short-circuit breaking capacities Icu and Ics: 90 % of normal value at sea level
- Reduction of the working range of the coil to 0,80-1,02
- Switching frequency Catalogue value No restriction
- Reduction of the rated insulation impulse voltage to Uimp 88%.

海拔至3500m

- Reduction of the working range of the coil to 0,80-0,96
- Switching frequency Catalogue value 50%
- Reduction of the rated insulation impulse voltage to Uimp 83%.

海拔至4000m

- Reduction of rated insulation voltage to 0,79 x Ui
- Reduction of load current to 0,78 x Ie
- Setting of load current in thermally delayed overcurrent protection devices to 1,1 x Ie
- Short-circuit breaking capacities Icu and Ics: 80 % of normal value at sea level
- Reduction of the working range of the coil to 0,80-0,90
- Switching frequency Catalogue value 50%
- Reduction of the rated insulation impulse voltage to Uimp 78%.

海拔至4500m

- Reduction of the working range of the coil to 0,80-0,85
- Switching frequency Catalogue value 50%
- Reduction of the rated insulation impulse voltage to Uimp 73%.

海拔至5000m

Site altitudes up to 5000m above sea level:
- Reduction of rated insulation voltage to 0,75 x Ui
- Reduction of load current to 0,7 x Ie
- Setting of load current in thermally delayed overcurrent protection devices to 1,15 x Ie
- Reduction of the working range of the coil to 0.80-1.08
- Switching frequency Catalogue value Not possible
- Reduction of the rated insulation impulse voltage to Uimp 68%