Fast fuse

I. Overview The RS series fuse for semiconductor device protection manufactured by LONGRONG (hereinafter referred to as the fast fuse) is suitable for AC 50HZ, rated voltage 250-1000V, rated current 30-5000A circuit, as a rectifier diode, thyristor and its composed of semiconductor devices Complete set of converter device short circuit and certain overload protection that does not allow overcurrent. 　　 Fast fuse meets national standards: GB13539.1-92, GB13539.4-92 is equivalent to the International Electrotechnical Commission standard; IEC269-1, IEC269-4. 　　 The fast fuse has been type tested by the low-voltage electrical test station designated by China Quality Inspection Center, and all test items are qualified. 　　 Fast fuse has the characteristics of large rated capacity, high breaking capacity, fast fusing speed, significant current limiting characteristics, low overvoltage, small breaking I2T, low rated power loss, small size, convenient installation, safe and reliable, and reliable indication after fusing. 　　 2. Model meaning 　　Note: *: D=40, O=60 (may not be marked), G=70 　　**: 1=48×48, 2=58×58, 3=72×72, 4=85×85, 5=105×105, 6=120×120 　　 Example: 　　1, RSF-5G　1000V/1600A-PK” means RSF-1000V/1600A fast fuse, porcelain tube: 105×105×70. Structure: plate type, single body, with switch indicating device. 　　2, RSF-3　800V/1400A-M2C　 means RSF-800V/1400A　 fast fuse, porcelain tube: 72×72×60. Structure: busbar type, double body, with striker indicator device. 　　 Three, basic parameters 　　RSF-series fast fuse basic parameters are shown in Table 1: 　　 Four, normal working conditions: 　　 1. The upper limit of ambient air temperature does not exceed +40 degrees, the lower limit is not less than -5 degrees, the average value within 24 hours does not exceed +35 degrees, and the annual average does not exceed +20 degrees. 　　 2. The altitude of the installation site does not exceed 2000M. 　　3. Install in a non-explosive medium, where there is no gas or conductive dust that can corrode metal and destroy insulation. 4. When the highest temperature is +40 degrees, the humidity does not exceed 50%. At lower temperatures, higher relative humidity is allowed (such as 90% at +20 degrees). Under such conditions, due to temperature changes, May cause condensation is allowed. 　　 5. The product can be installed vertically, horizontally or obliquely, and there should be no significant vibration and impact in the workplace. 　　6. The product must be connected to a water-cooled bus or forced air-cooled when the product has a rated current greater than 1250A and is used for a long time above 70% of the rated current. 　　 5. Structure: 　　 fast fuse is a traditional filled closed tube structure. The filler generally uses traditional bulk quartz sand. For higher rated voltage or smaller fuse size, some product specifications adopt the latest technology of solidified quartz sand. Products using new technology have their breaking capacity and various performance indicators. Both are significantly improved. 　　The micro switch in the fast fuse indicating device adopts the LXW2-11 micro switch. Its main parameters are: ~380V　5A. The switch has a pair of normally open and a pair of normally closed contacts, and the action force is ≤500g. The installation forms of 　　 fast fuse mainly include: P type-flat plate type, M-bus type, ZM-straight bus type. P type installation methods are divided into: single body, double body, three body; M type installation methods are divided into: single body, double body (the single body can be installed according to the installation needs, and the contact force is not required to be bent, and the contact blade terminal extends in the required direction Out).