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DFW-12 Outdoor opening and Closing (Ring Cage)

DFW-12 Outdoor opening and Closing (Ring Cage)

  • The outdoor ring main unit uses a vacuum switch as the breaking device, and is insulated with SF6 gas in a common box. It has a compact structure, small footprint, beautiful app...
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  • Product overview
  • Model and features
  • Technical parameter
  • Overall dimension

Product overview

The outdoor ring main unit uses a vacuum switch as the breaking device, and is insulated with SF6 gas in a common box. It has a compact structure, small footprint, beautiful appearance, and can coordinate with the surrounding environment. Due to the fully sealed and fully insulated concept, all switch parts in the ring main unit, including all high-voltage live bodies and mechanical parts, are completely sealed in the main box and are not affected by condensation and external pollutants; the protection level of the main box can reach IP67, equipped with Cooper waterproof touchable cable head, which can effectively prevent occasional flooding in rain-prone areas.

Model and features

Normal service conditionsNormal service conditions

●  The upper limit of ambient temperature is +40°C and the lower limit is -15°C;
●  The altitude is not greater than 1000m;
●  The daily average of relative temperature is not greater than 95% and the monthly average is not greater than 90%; there is no risk of fire, explosion or severe vibration Place;
●  The surrounding air is free of obvious pollution such as corrosive or flammable gases, water vapor and conductive dust.

Technical parameter


名称
Description 		单位
Unit 		真空负荷开关
Load switch 		真空断路器
Vacuum circuit breaker
额定电压Rated voltage kV 12 12
额定电流Rated current A 630 630
1分钟工频耐压1 minute power frequency withstand Voltage kV 42 42
雷电冲击耐压(BlL) Lightning impulse withstand voltage (BIL) kV 95 95
15分钟直流耐压15 minutes DC withstand voltage kV 53 53
零表压1分钟工频耐压
Zero gauge pressure 1 minute power frequency withstand voltage 		kV 38 38
二次回路工频耐压(1分钟）
Secondary circuit power frequency withstand voltage (1 minute) 		V 2000 2000
电动操作电源电压Electric operation power supply voltage V DC24 DC24
额定负荷开断电流Rated load breaking current A 630 630
额定电缆充电开断电流Rated cable charging breaking current A 10 10
额定短路开断电流Rated short-circuit breaking current kA 20 20
额定短路关合电流Rated short-ci「cuit making current kA 50 50
额定短时耐受电流，3秒Rated short-time withstand current, 3 s kA 20 20
额定峰值耐受电流Rated peak withstand current kA 50 50
机械寿命Mechanical life 次 10,000 10,000
SF6气体额定压力(20°() Rated pressure of SF6 gas (20°C) 0.035 0.035
SF6气体年泄漏率％SF6 gas annual leakage rate% Mpa <0.1 <0.1

Overall dimension


overall dimension

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