SF6 Switch

RAM – 负载断路开关设备

G&W Electric RAM 垫装和拱顶气体绝缘开关设备在完全密封的无死角设备中具有负载断路开关功能。这些开关设计用于电压高达 38kV、900A 负载断路和持续电流以及 40kA 非对称瞬时和接近故障额定值的三相系统。这些开关的特点是占地面积小,采用前端或顶部接入结构。这些开关非常灵活,有多种不同的样式。高压连接可设置在底部、顶部或侧面,以方便电缆培训和安装。

开关的设计符合 IEEE C37.72 和 C37.74 的负载断开能力标准。垫装外壳的设计和测试符合 IEEE C57.12.28 和 C57.12.29。

功能和优点

  • 建筑 – 结构紧凑,开关操作和衬套可从正面接触。也可提供拱顶式结构,带有顶部或底部衬套,或可从顶部接触到操作器和衬套。

  • 电压感应 – 提供集成式电压检测,可与电压指示面板一起使用,以确定同相情况,或与继电器一起使用,精度高达 1%。

  • 自动化 – 可通过便携式或永久安装的电机和控制器实现电机自动化。各种继电器(如 SEL、ABB 和 GE)均可使用 G&W Electric 编程和机柜结构。机柜可订购低电压外壳,用于垫式安装、座式安装或 IP68 等级潜水型,用于拱顶安装开关设备。可提供自动源转移编程或 LaZer 定制解决方案。

  • 可见的断裂 – 所有通道都配备了可视断路装置,以便查看开启和关闭位置。

  • 地震认证 – 这些开关可根据 ASCE(美国土木工程师学会)标准 7-05 第 13 章的指导原则进行设计。这些准则涵盖了安装在建筑物中的非结构部件的设计。开关还接受了 ICC-ES-AC-156(国际规范委员会评估服务验收标准)规定的测试,该标准规定了开关的振动台测试输入。经认证可用于加利福尼亚州医疗保健设施的 OSHPD(全州卫生规划与发展办公室)项目。OSHPD 的申请编号为 OSP-0157-10。

RAM、PRAM 和 SPRAM 配置表(SF6 垫装开关)

# of WaysOne-line Diagram (Horizontal)Voltage Class (kV)Mom. (kA asym)Catalog NumberApproximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
2
1540PRAM21-376L-40PI41
(1041)
1550 (705)
25PRAM21-386L-40PI
35PRAM21-396L-40PI
3
1540PRAM33-376L-40PI55
(1397)
1682 (763)
25PRAM33-386L-40PI
35PRAM33-396L-40PI
4
1540PRAM44-376L-40PI70
(1778)
1800 (818)
25PRAM44-386L-40PI
35PRAM44-396L-40PI
5
1540PRAM55-376L-40PI86
(2184)
2400 (1089)
25PRAM55-386L-40PI
35PRAM55-396L-40PI
6
1540PRAM66-376L-40PI101 (2565)2600 (1182)
25PRAM66-386L-40PI
35PRAM66-396L-40PI
15 kV: Enclosure depth = 50.8″ (1289mm), Height = 55.0″ (1397mm)
25 kV and 35 kV: Enclosure depth = 57.8″ (1468mm), Height = 55.0″ (1397mm)

Ratings Chart for PRAM

Voltage Class15 kV25 kV35 kV
Maximum Design Voltage15.5 kV27 kV38 kV
Impulse Level (BIL)110 kV125 kV150 kV
One Minute Withstand35 AC kV60 AC kV70 AC kV
One Minute Withstand, Protection Test Rating34 AC kV40 AC kV50 AC kV
15 minute withstand53 DC kV78 DC kV103 DC kV
** Continuous and load break current630 Amps630 Amps630 Amps
Momentary current40 kA asym40 kA asym40 kA asym
* Fault-close current (3 times)40 kA asym40 kA asym40 kA asym
One second current25 kA asym25 kA asym25 kA asym
Open Gap withstand200 kV200 kV200 kV
* 10 operation overload interrupting capability3000 amps3000 amps3000 amps
* Operations load interrupting at 600a120012001200
Mechanical endurance, operations200020002000
* Rating shown for Linear Puffer, Rotary Puffer limited to 32kA asym
** Available at 900Amps

Ratings Chart for RAM

Voltage Class15 kV25 kV35 kV
Maximum Design Voltage15.5 kV27 kV38 kV
Impulse Level (BIL)110 kV125 kV150 kV
One Minute Withstand35 AC kV60 AC kV70 AC kV
One Minute Withstand, Protection Test Rating34 AC kV40 AC kV50 AC kV
15 minute withstand53 DC kV78 DC kV103 DC kV
** Continuous and load break current630 Amps630 Amps630 Amps
Momentary current40 kA asym40 kA asym40 kA asym
* Fault-close current (3 times)40 kA asym40 kA asym40 kA asym
One second current25 kA asym25 kA asym25 kA asym
Open Gap withstand200 kV200 kV200 kV
* 10 operation overload interrupting capability3000 amps3000 amps3000 amps
* Operations load interrupting at 600a120012001200
Mechanical endurance, operations200020002000
* Rating shown for Linear Puffer, Rotary Puffer limited to 32kA asym
** Available at 900Amps

Ratings Chart for SPRAM

Voltage Class15 kV27 kV38 kV
Maximum Design Voltage15 kV27 kV38 kV
Impulse Level (BIL)110 kV125 kV150 kV
One Minute Withstand35 AC kV60 AC kV70 AC kV
One Minute Withstand, Protection Test Rating34 AC kV40 AC kV50 AC kV
15 minute withstand53 DC kV78 DC kV103 DC kV
** Continuous and load break current630 Amps630 Amps630 Amps
Momentary current40 kA asym40 kA asym40 kA asym
* Fault-close current (3 times)40 kA asym40 kA asym40 kA asym
One second current25 kA asym25 kA asym25 kA asym
Open Gap withstand200 kV200 kV200 kV
* 10 operation overload interrupting capability3000 amps3000 amps3000 amps
* Operations load interrupting at 600a120012001200
Mechanical endurance, operations200020002000
* Rating shown for Linear Puffer, Rotary Puffer limited to 32kA asym
** Available at 900Amps

有关配件和其他选项,请参阅完整目录。

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