Siemens 3AH3 Operating Instructions Manual page 13

Description
Construction
The vacuum circuit-breaker consists of the mechanism
housing (60.), the 3-pole assemblies (19.) with vacuum
interrupter (30.), cast-resin post insulators (16.1and
16.2), struts (28.) and of the operating rods (48.) with
contact pressure springs (49).
Each of three pole assemblies (19.) is supported by
two cast-resin post insulators (16.1and 16.2), which are
bolted to the pole plate (15) respectively.
The main feature of the 3AH3 vacuum circuit-breaker
are shown in Fig.2/1.
Fig.2/1 3AH3 vacuum circuit-breaker
图.2/1 3AH3 真空断路器
The mechanism housing (60.) accommodates all
electrical and mechanical elements required for
opening and closing the vacuum circuit-breaker. Fig.
2/2 shows the arrangement of the individual modules in
the mechanism housing.
The mechanism housing has a detachable cover
60.1(Fig.2/3).
This cover (60.1) has cutouts for the actuating and
indicating devices.
The vacuum circuit-breaker is closed by means of the
pushbutton (53.). The motor (50.4) immediately
recharges the closing spring (62.). In the event of motor
power supply failure, the closing spring can be charged
by means of a hand crank (50.). The cover
includes an opening (50.1) for the hand crank, behind
which the hand crank coupling (50.5) of the gearing
(50.2) is located. The stored-energy mechanism state
is shown by the indicator (55.). The indicator (59.)
shows the breaker state (ON-OFF). The operating
cycle counter (58.) indicates the number of charging
operations. The rating plate (51.) is attached to the
mechanism housing but visible through an opening
(51.1) in the cover.
The movement is transmitted to the pole assemblies
via moulded-plastic operating rods (48.).
Operating Instruction Siemens 3AH3 / 西门子 3AH3 真空断路器使用手册
说明
结构
真空断路器由机构箱 (60.), 3 相极柱装配 (19.) 真空
灭弧室 (30.), 环氧浇注绝缘子 (16.1 和 16.2), 绝缘支杆
(28.) 和带有触头压力弹簧 (49)的绝缘拉杆(48.).
每相极柱装配 (19.) 由两个环氧浇注绝缘子 (16.1 和
16.2) 所支撑, 绝缘子是通过螺栓连接分别固定在支撑板
上 (15).
3AH3 真空断路器的主要特征见图 2/1.
机构箱 (60.) 包含了用于合分断路器 的所有机械和电气
单元. 图.2/2 显示了机构箱中各个独立的模块单元.
机构箱有一块可拆卸的面板 60.1(图.2/3).
面板 (60.1) 有操作和指示设备的开孔.
真空断路器通过按钮 (53.) 合闸后. 马达 (50.4) 立即对
合闸弹簧 (62.) 储能. 在电动储能失败的情况下,合闸弹
簧可通过手柄 (50.) 进行手动储能. 面板上有一个手动
储能的开孔(50.1), 它的后面是齿轮箱 (50.2) 的 手柄储
能机构 (50.5). 储能机构状态通过储能指示器 (55.) 显
示. 指示器 (59.) 显示断路器状态 (合-分). 操作计数器
(58.) 显示了储能操作次数. 铭牌 (51.) 安放于机构箱中
但是可以通过面板上的开孔 (51.1) 看到.
合分操作通过绝缘拉杆 (48.) 传送到极柱装配.
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