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DNH1(HR17) Fuse Type Isolating Switch
Product Name: DNH1(HR17) Fuse Type Isolating SwitchModel Number: HR17B SeriesPlace of Origin: China1 GeneralDNH1 (HR17) series fuse type isolating switch is a new type isolating switchwith rated insulating voltage AC 800V, rated operating voltage 690V, 400V, ratedfrequency 50Hz, and rated current 160A-630A. It is mainly used as power switch,isolating switch and emergency switch with the functions of protecting circuit,however, it can not be used to directly close/break a single motor.This product is in conformity with the Standards of GB14048.3-2002 and IEC947-3(2001).2 Construction characteristicThe sealed structure of this type isolating switch is three poles whole insulated.The whole enclosure is made of high strength fire-resistance materials withfunction of high insulating protection. The operate handle upon the cover issafe to use and convenient to operate. The transparent panel on the switch covercan be used to examine the working condition. And the cover is convenient to takeoff and the fuse is simple for replace. While the isolating switch is in thebreaking, a clear fracture will appeared.The contact system of switch is advanced designed. When the switch breaks withload, the current will automatic transferred to the arcing corner, and whilethe switch compounded with excellent arcing chamber, it can be guaranteed the reliable break, few ablate on contact side, stable work condition.This structure of switch can be divided into to two types, one is fixed type, andanother is hanging type. When the customers selected hanging type, the power supplywill directly install incoming terminal via the base of switch according withthe standard of landscape orientation. When the customers selected fixed type,the incoming terminal can connect with bus bar, and can be directly connectedto cable while it is collocating with specific terminals.The parts of the switch adopt plug type, thus, the switch is convenient to maintainand repair. When a frame or molded type case circuit breaker has installed onthe switch load terminals, this switch can be used as an isolating switch whenit replace fuse to isolating knife.3 Main technical parameters3.1 Rated insulating voltage: AC 800V3.2 Rated operating current: AC 690V, AC 400V3.3 Rated heating current: 160A, 250A, 400A, 630A3.4 Rated operating current: 400V: 160A, 250A, 400A, 630A, 690V: 100A, 200A, 315A, 425A3.5 Kind of usage: 400V: AC-20B, AC-21B, AC-22B, AC-23B; 690V: AC-20B, AC-21B, AC-22B3.6 Fuse link installed: The fuse is conformity with GB13539.13.7 Withstanding voltage: interphase 12kV, break of each phase 15kV3.8 Rated limiting short current: When the switch installed with standard fuse, therated withstanding short making capacity, short circuit and making capacity areall 50kA under the condition of AC690V, COSΦ0.2
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