Datasheet > NGRUS325

NGRUS325

更新时间： 2023-12-06 20:13:27

品牌	Logo	应用领域
力特 - LITTELFUSE		/
页数	文件大小	规格书
9页	1169K
描述
高电阻接地可防止许多与未接地和固化接地的配电和电气利用系统相关的问题。高电阻接地可以限制故障点的损害、消除瞬态过电压、减少闪弧危险、限制人员接触到的电压，并为基于电流的选择性接地故障检测和协调提

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

NGRUS325 数据手册

Protection Relays & Controls

NGR SERIES – US

Neutral Grounding Resistor System

Features

Enclosure

The NGR Series – US comes pre-installed in a

ventilated NEMA 3R galvanized steel enclosure

and components are pre-wired to terminals for

ease of installation. Back view shown on left.

ER Series Sensing Resistor

Use with the SE-325 or the SE-330 to continuously monitor

the continuity of a neutral-grounding resistor and eliminate

hazardous voltage levels at the relay.

ꢁꢀ

ER-600VC is designed for use on systems up

to 600 V for indoor applications. Available in

optional moisture-proof enclosure (shown on

left) for outdoor applications.

ꢁꢀ

ER-5KV for use on systems up to 4160 V for

indoor applications.

ꢁꢀ

ER-5WP is designed for use on systems up

to 4160 V and comes with weather-protected

terminals for outdoor installations.

Description

High-resistance grounding prevents many of the problems

that are associated with ungrounded and solidly grounded

electrical distribution and utilization systems. High-resistance

grounding can limit point-of-fault damage, eliminate transient

overvoltages, reduce the arc-flash hazards, limit voltage

exposure to personnel, and provide adequate tripping levels

for selective current-based ground-fault detection and

coordination.

Earth-Fault Current Transformer

Used with the SE-325 or the SE-330 to measure ac current

flowing through the NGR for use with the continuity

monitoring circuit and to detect ground faults.

ꢁꢀ

ELCT5-31 used with SE-330 for 5 A

and 10 A NGRs.

The Littelfuse Neutral Grounding Resistor System is a

neutral grounding resistor (NGR), current transformer, and

sensing resistor installed in a NEMA 3R enclosure used to

high-resistance ground transformers and generators. The

NGR system is designed for use with Littelfuse Neutral

Grounding Resistor Monitors for complete system grounding

and grounding protection.

SE-CS10-2.5 used with SE-330 for 10 A

and 15 A NGRs.

CT200 used with the SE-325 for all

applications.

The NGR series – US systems are designed for use in US

applications and all other parts of the world, not including

Canada. For applications in Canada, please use the NGR

series – Canada.

5SHT-101-E (not shown) used with SE-330 for

25 A NGRs.

Beneﬁts

Applications

ꢁꢀ

Eliminate phase-to-ground arc-ﬂash incidents

High-resistance grounding is applied on transformers and

generators where safety and continuity of service are

important. A faulted feeder may remain in operation until it

is safe to repair the fault, where allowed by the local

electrical code.

ꢁꢀ

Eliminate transient overvoltages

Reduce point-of-fault damage

Can provide continuity of service during a ground fault

Includes current transformer and ER series sensing

resistor for use with Littelfuse monitoring relay and for

ease of installation.

Littelfuse.com

Rev: 1-B-031920

1 of 9

12 3 4 5 6 7...9

下载PDF

与NGRUS325相关器件

型号	品牌	描述	获取价格	数据表
NGRUS326	LITTELFUSE	高电阻接地可防止许多与未接地和固化接地的配电和电气利用系统相关的问题。高电阻接地可以限制	获取价格
NGRUS327	LITTELFUSE	高电阻接地可防止许多与未接地和固化接地的配电和电气利用系统相关的问题。高电阻接地可以限制	获取价格
NGRUS328	LITTELFUSE	高电阻接地可防止许多与未接地和固化接地的配电和电气利用系统相关的问题。高电阻接地可以限制	获取价格
NGRUS329	LITTELFUSE	高电阻接地可防止许多与未接地和固化接地的配电和电气利用系统相关的问题。高电阻接地可以限制	获取价格
NGRUS330	LITTELFUSE	高电阻接地可防止许多与未接地和固化接地的配电和电气利用系统相关的问题。高电阻接地可以限制	获取价格
NGRUS331	LITTELFUSE	高电阻接地可防止许多与未接地和固化接地的配电和电气利用系统相关的问题。高电阻接地可以限制	获取价格

产品中心

服务支持

精选活动

关于我们

帮助中心

NGRUS325

NGRUS325 数据手册

与NGRUS325相关器件

与NGRUS325相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

NGRUS325

NGRUS325 数据手册

与NGRUS325相关器件

与NGRUS325相关文章

您还可以找

您在本页遇到什么问题？