ALFA UNION成立于 1997 年，是一家捷克公司，被称为牵引车辆、变电站开关设备和能源设备的机电部件的供应商。
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ominal voltage
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750VDC / 1500VDC / 3000VDC
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Nominal current
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1000A / 2000A / 4000A / 6300A / 10000A / 12000A
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Number of poles
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36925
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Version
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manual
manual with magnetic blocking
motorized
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Control voltage
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24 / 48 / 60 / 110 / 220VDC / 230VAC / 3x400VAC
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Ambient temperature
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-25° - + 40°C
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Number of auxiliary contacts
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0 / 2 / 4 / 6 / 8
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Overvoltage class
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OV4
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Pollution degree
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PD4
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Degree of protection
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IP00
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Mechanical lifetime
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motorized version - 100 000 cycles
manual version - 20 000 cycles
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According to standards
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EN 50123
EN 50328
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ALFA UNION隔离开关STOL系列介绍
STOL disconnectors are devices which are installed in stationary substations. They are used for no-load switching of electrical circuits. They are controlled either manually, with possibility of electromagnetic blocking of end positions, or by a motor unit with emergency control by a crank handle. The disconnector status is signalled by auxiliary contacts. Modular design of the STOL disconnector enables various versions.
STOL 隔离开关是安装在固定变电站中的设备。它们用于电路的空载切换。它们既可以手动控制，也可以通过电磁锁定终端位置，或者由带有曲柄紧急控制的电机单元控制。 隔离开关状态由辅助触点发出信号。STOL隔离开关的模块化设计支持各种版本。
ALFA UNION手动隔离开关STOL系列其他常用型号：
ALFA UNION STOL4021-MAB-R-220DC-1-8-A
ALFA UNION STOL4021-MO-R-220DC-1
ALFA UNION STOL4021-MAB-R-110DC-1-8-A