◆ 主要用途Use FN25-12D真空负荷开关和FN25-12DR组合电器三要用于12kV三相交流50Hz环网或终端供电的市区配电站和工业用电设备中，作负荷控制和短路保护用，由于组合电器对变压器等电器设备的保护使用比断路器更可靠，特别适用于环网、双辐射供电单元和箱式变电站。 It s used in the ring network、city distribution and industrial equipment of 12kV and three-phase AC 50Hz to control load and short-cicuit.Because the switch with fuse protects transformer etc.more reliably than circuit breaker.it is especially suitable for ring network、double radial distribution and package substation. ◆ 技术参数 Technical parameter 序号 Number 项目 Name 单位 Unit FN25—12D／ T630-20 FN25—1 2D／ T100-31.5 1 额定电压 Rated voltage KV 12 2 额定频率 Rated frequency Hz 50 3 额定电流 Rated current A 630 100 4 额定绝缘水平 Rated insulating level 1min工频耐受电压 1min power frequency withstand voltage kV 灭弧室断口30：对地及相间42：隔离断口48 Arc room break30.to ground and interphase42.isolating break48 雷电冲击耐压(峰值) Lighting impulse resisting voltage(peak) 对地及相间75、隔离断85 To ground.interphase 75、isolation break 85 5 4S热稳定电流 4S heat-stabling current kA 20   6 额定动稳定电流(峰值) Rated machine stabling current(peak) 50   7 额定闭环开断电流 Rated closed switch-off current   630　　　50 8 额定有功负载开断电流 Rated power load switch off current A 630 9 额定电缆充电开断电流 Rated cable charging switch off current 10 10 额定转移电流 Rated transfer current   2000 11 开断空载变压器容量 Switch-0ff no-load transformer capacity kva 1250　　　1.5 12 额定短路开断电流 Rated shert-circuit switch-off current     1.8　31.5 13 额定短路关合电流(峰值) Rated shert-circuit controlly current(peak) kA 50 80(预期值) Prospesctive value 14 接地开关额定热稳定电流(2s) Earth switch rated heat-stabling current(2S)   20 15 接地开关额定动稳定电流(峰值) Earth switch rated machine stabling current(peak) 50 16 分合闸操作电源额定电压 on-and-off operating power rated voltage V DC220,110 AC220,110 17 机械寿命(负倚开关／接地开关) Mechanical life(load switch/earth switch) 次(Times) 10000／2000

 

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◆ 外形图 Appearance diagram