RAM – 负载断开开关

Name: RAM – 负载断开开关
Brand: G&W Electric

G&W Electric RAM 垫片和穹顶气绝缘开关设备在完全密封的死前端设备中具备负载断开切换功能。这些开关设计用于电压最高38kV、900A负载断路和连续电流，以及40kA非对称瞬时和接近故障额定的三相系统。它们具备可选的紧凑型布局，采用前置或顶部通道结构。这些开关极其灵活，提供多种款式。高压连接可以安装在底部、顶部或侧面，以便于电缆训练和安装。

这些交换机按照IEEE C37.72和C37.74设计，具备负载断开能力。垫装外壳设计并测试符合IEEE C57.12.28和C57.12.29标准。

配置器SF6加载中断通过电子邮件发送您的规格

特色与优势

建设 – 可选紧凑型结构，前置可访问开关操作员和衬套。拱顶结构也可选配顶部或底部衬套，或顶部可接入操作员和衬套。
电压感应 – 可配备集成电压传感，可配合电压指示面板测定同相状态，或用于继电器，精度高达1%。
自动化 – 适用于电动机自动化，配备便携式或永久安装的电机和控制装置。G&W Electric的编程和箱体制造提供了多种继电器，如SEL、ABB和GE。柜体可订购为低压外壳，用于安装垫、底座或IP68级潜水器，用于穹顶安装开关设备。提供自动源传输或激光器定制解决方案的编程。
可见断裂 – 所有通道均配备可见断裂点，可查看开闭位置。
地震认证 – 交换机可根据美国土木工程师学会（ASCE）标准7-05第13章的指导方针定制设计。这些指南涵盖了建筑物中非结构性构件的设计。这些交换机还经过了ICC-ES-AC-156（国际规范委员会评估服务验收标准）规定的测试方案，规定了施加在交换机上的震动表测试输入。认证可用于加州州级健康规划与发展办公室（OSHPD）医疗机构项目。OSHPD的申请编号为OSP-0157-10。

内存、PRAM 和 SPRAM（SF6 垫装交换机）配置表

# of Ways	One-line Diagram (Horizontal)	Voltage Class (kV)	Mom. (kA asym)	Catalog Number	Approximate
					Width* in. (mm)	Wt. w/SF6 lbs (kg)
2		15	40	PRAM21-376L-40PI	41 (1041)	1550 (705)
		25		PRAM21-386L-40PI
		35		PRAM21-396L-40PI
3		15	40	PRAM33-376L-40PI	55 (1397)	1682 (763)
		25		PRAM33-386L-40PI
		35		PRAM33-396L-40PI
4		15	40	PRAM44-376L-40PI	70 (1778)	1800 (818)
		25		PRAM44-386L-40PI
		35		PRAM44-396L-40PI
5		15	40	PRAM55-376L-40PI	86 (2184)	2400 (1089)
		25		PRAM55-386L-40PI
		35		PRAM55-396L-40PI
6		15	40	PRAM66-376L-40PI	101 (2565)	2600 (1182)
		25		PRAM66-386L-40PI
		35		PRAM66-396L-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 Class	15 kV	25 kV	35 kV
Maximum Design Voltage	15.5 kV	27 kV	38 kV
Impulse Level (BIL)	110 kV	125 kV	150 kV
One Minute Withstand	35 AC kV	60 AC kV	70 AC kV
One Minute Withstand, Protection Test Rating	34 AC kV	40 AC kV	50 AC kV
15 minute withstand	53 DC kV	78 DC kV	103 DC kV
** Continuous and load break current	630 Amps	630 Amps	630 Amps
Momentary current	40 kA asym	40 kA asym	40 kA asym
* Fault-close current (3 times)	40 kA asym	40 kA asym	40 kA asym
One second current	25 kA asym	25 kA asym	25 kA asym
Open Gap withstand	200 kV	200 kV	200 kV
* 10 operation overload interrupting capability	3000 amps	3000 amps	3000 amps
* Operations load interrupting at 600a	1200	1200	1200
Mechanical endurance, operations	2000	2000	2000
* Rating shown for Linear Puffer, Rotary Puffer limited to 32kA asym
** Available at 900Amps

Ratings Chart for RAM

Voltage Class	15 kV	25 kV	35 kV
Maximum Design Voltage	15.5 kV	27 kV	38 kV
Impulse Level (BIL)	110 kV	125 kV	150 kV
One Minute Withstand	35 AC kV	60 AC kV	70 AC kV
One Minute Withstand, Protection Test Rating	34 AC kV	40 AC kV	50 AC kV
15 minute withstand	53 DC kV	78 DC kV	103 DC kV
** Continuous and load break current	630 Amps	630 Amps	630 Amps
Momentary current	40 kA asym	40 kA asym	40 kA asym
* Fault-close current (3 times)	40 kA asym	40 kA asym	40 kA asym
One second current	25 kA asym	25 kA asym	25 kA asym
Open Gap withstand	200 kV	200 kV	200 kV
* 10 operation overload interrupting capability	3000 amps	3000 amps	3000 amps
* Operations load interrupting at 600a	1200	1200	1200
Mechanical endurance, operations	2000	2000	2000
* Rating shown for Linear Puffer, Rotary Puffer limited to 32kA asym
** Available at 900Amps

Ratings Chart for SPRAM

Voltage Class	15 kV	27 kV	38 kV
Maximum Design Voltage	15 kV	27 kV	38 kV
Impulse Level (BIL)	110 kV	125 kV	150 kV
One Minute Withstand	35 AC kV	60 AC kV	70 AC kV
One Minute Withstand, Protection Test Rating	34 AC kV	40 AC kV	50 AC kV
15 minute withstand	53 DC kV	78 DC kV	103 DC kV
** Continuous and load break current	630 Amps	630 Amps	630 Amps
Momentary current	40 kA asym	40 kA asym	40 kA asym
* Fault-close current (3 times)	40 kA asym	40 kA asym	40 kA asym
One second current	25 kA asym	25 kA asym	25 kA asym
Open Gap withstand	200 kV	200 kV	200 kV
* 10 operation overload interrupting capability	3000 amps	3000 amps	3000 amps
* Operations load interrupting at 600a	1200	1200	1200
Mechanical endurance, operations	2000	2000	2000
* Rating shown for Linear Puffer, Rotary Puffer limited to 32kA asym
** Available at 900Amps

有关配件及其他选项，请参见完整目录。

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