PGR-5330-21-00【PDF 1/2 页】GRND RES RELAY DEVICENET DC SUP

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录629

[1页]2页

POWR-GARD ? Protection Relays, Monitors & Systems

Ground-Fault Protection – Resistance-Grounded System (PGR 5000 Family)

PGR-5330 SERIES

Resistance Grounded Relay

Description

The PGR-5330 is an advanced ground-fault and grounding-

resistor-monitoring relay. It measures neutral current, neutral-to-

ground voltage, and neutral-to-ground resistance. It provides

continuous monitoring of the neutral-to-ground path to verify

that the neutral-grounding resistor (NGR) is intact. This is of

utmost importance because an open NGR renders current-

sensing ground-fault protection inoperative. The PGR-5330 can

be used with low- and medium-voltage transformers and

generators used in processing, manufacturing, chemical, pulp

and paper, petroleum, and water-treatment facilities.

Resistor Monitoring

The PGR-5330 combines the measured values of resistance,

current, and voltage to continuously determine that the NGR

is intact. It is able to detect a resistor failure with or without a

ground fault present. Voltage-rated sensing resistors are used to

monitor NGRs on systems up to 35 kV.

Ground-Fault Monitoring

The PGR-5330 uses an application-appropriate current

transformer to reliably detect ground-fault currents as small as

100 mA. DFT filtering ensures that false trips due to harmonic

noise from adjustable-speed drives do not occur. Should the

resistor open and a ground fault subsequently occur, the

PGR-5330 will detect the fault through voltage measurement,

while other current-sensing relays will be ineffective.

Wiring Diagram

Simplified Circuit Diagram

CONTROL

POWER

UNIT

HEALTHY

POWER SYSTEM

NEUTRAL (X0)

POWR-GARD

SENSING RESISTOR

PGE FAMILY

POWR-GARD ? 16

RESISTANCE GROUNDED RELAY 17

PGR-5330 SERIES

+24 Vdc 18

RESET

PULSE

ENABLE

NGR

POWR-GARD ?

PGE FAMILY

SENSING RESISTOR

POWR-GARD ?

PGR-5330

RESISTANCE

GROUNDED

RELAY

(required)

ANALOG

OUTPUT

4-20 mA

Accessories

G A

POWR-GARD ?

TRIP OR

PULSING

0 V 21

PGE Family Sensing Resistors

Required interface between the power system

and the PGR-5330. Eliminates hazardous voltage

levels at the relay.

CURRENT TRANSFORMER

PGC FAMILY

(required)

GROUND

FAULT

RESISTOR

FAULT

PGC-3000 Ground-Fault Current Transformers

Sensitive ground-fault current detection (5 A primary)

PGC-5000 Ground-Fault Current Transformers

Sensitive ground-fault current detection (30 A primary)

Other Current Transformers

For low resistance NGRs choose a CT primary

approximately equal to the NGR rating.

www.littelfuse.com/pgr-5330

? 2010 Littelfuse ? POWR-GARD ? Protection Relay Catalog

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式