Page 43 - 山东华科电气有限公司

10kV 级 YB- □ -12
预装式变电站 ( 美式 )
outdoor preinstalled type substation (American type)

操作说明 /Instructions

◆ 负荷开关的操作：
美式箱变所用的油浸式负荷开关根据其实现的功能不同有二工位、四工位 T 型、四工位 V 型三种， 可供选择其中一种， 三种的操作分别如下：
◆ 四工位 V 型负荷开关参见图 2，动力片结构是“v”型结构，见图中黑色部分，图中“Ⅰ、 Ⅱ”为环网供电进出线，“T”为经后备熔断器、插入熔断器接变压器高压进线。
环网负荷开关带负荷对网路进行切换。负荷开关的四个工作状态：
◇ “Ⅰ-Ⅱ-T”位置时，“Ⅰ”和“Ⅱ”两网连通，变压器有电；( 变电站起环网作用 )
◇ “Ⅰ-T”位置时，“Ⅰ”网与变压器连通；( 变电站起终端 )
◇ “Ⅱ-T”位置时，“Ⅱ”网与变压器连通；( 变电站起终端 )
◇ “O”位置时，“Ⅰ、Ⅱ”网与变压器均断开；( 全部不带电 )
用专用操作手柄插入负荷开关转轴，顺时针或逆时针方向旋转约 130°，负荷开关每操作一次，动力片即转动一档。开关操作举
例：由电源“Ⅰ”供电改为电源“Ⅱ”供电。
a、将专用操作手柄插入开关轴内；
b、顺时针转动开关一次，此时开关“V”型刀片处于“Ⅰ-Ⅱ-T”位置；
c、顺时针方向再转动一次，此时“V”型刀片处在“Ⅱ-T”之间为电源“Ⅱ”供电；操作完成。
操作方法二：
a、将专用操作手柄插入开关轴内；
b、逆时针转动开关一次，此时开关“V”型刀片处于“O”位置：
c、逆时针方向再转动一次，此时“V”型刀片处在“Ⅱ-T”之间为电源“Ⅱ”供电；操作完成。
采用以上两种方法均可以完成从电源“Ⅰ”转换到电源“Ⅱ”供电，但第二种方法更安全、合理。电源“Ⅰ”切断后不会被再送电，同时若电源“Ⅱ”出现故障也不
会造成合到故障上。而采用方法一，则会出现双电源供电，当电源“Ⅰ”转换到电源“Ⅱ”时，若电源相位不同等原因造成故障。
◆ 四工位环网型负荷开关 (T 型 )
四工位“T”型负荷开关工作原理见图 3，原理操作同 V 型。
◆ Operation of load switch:
American-style box used by the oil-immersed load switch according to its different functions have two stations, four-station T-type, four-station V-type
three, one of the options, three operations are as follows:
◆ 4-position V-type load switch See Figure 2, the power chip structure is "v" type structure, see the black part of the figure, the figure " Ⅰ , Ⅱ " for the
ring network power supply and outlet, "T" , Insert the fuse connected to the transformer high voltage into the line. Ring network load switch with
load to switch the network. Four working states of the load switch:
◇ " Ⅰ - Ⅱ -T" position, " Ⅰ " and " Ⅱ " two network connectivity, the transformer has electricity; (substation from the ring network role)
◇ "I-T" position, "I" network connected with the transformer; (substation from the terminal)
◇ " Ⅱ -T" position, " Ⅱ " network connected with the transformer; (substation from the terminal)
◇ "O" position, " Ⅰ , Ⅱ " network and the transformer are off; (all uncharged)
With a dedicated operating handle into the load switch shaft, clockwise or counterclockwise rotation of about 130 ° , the load switch for each
operation, the power that is rotating a file. Switch operation
Example: Power supply from power supply "I" to power supply " Ⅱ ".
A, the special operating handle into the switch shaft;
B, turn the switch clockwise, then switch "V" type blade in the " Ⅰ - Ⅱ -T" position;
C, clockwise and then turn once, then "V" type blade in the " Ⅱ -T" between the power supply " Ⅱ " power supply; operation is completed.
Method 2:
A, the special operating handle into the switch shaft;
B, turn the switch counterclockwise once, then switch "V" type blade in the "O" position:
C, counterclockwise and then turn once, then "V" type blade in the " Ⅱ -T" between the power supply " Ⅱ " power supply; operation is completed.
Using the above two methods can be completed from the power "I" to power supply " Ⅱ " power supply, but the second method is more secure and
reasonable. Power "I" will not be re-transmission after the cut, and if the power " Ⅱ " failure will not cause to the fault. And the use of a method, there
will be dual power supply, when the power " Ⅰ " switch to the power " Ⅱ ", if the power phase is different and other causes of failure.
◆ four-position ring network load switch (T-type)
Four-station "T" -type load switch works shown in Figure 3, the principle of operation with the V-type.

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