SE-703-xx-00 [LITTELFUSE]

The SE-703 is a microprocessor-based earth-fault;


型号：	SE-703-xx-00
厂家：	LITTELFUSE
描述：	The SE-703 is a microprocessor-based earth-fault
文件：	总1页 (文件大小：298K)
中文：	中文翻译
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Protection Relays and Controls

Ground-Fault Protection–Grounded Systems

SE-703 SERIES

Earth-Leakage Monitor

Description

The SE-703 is a microprocessor-based earth-fault relay for resistance-

and solidly earthed systems. It offers sensitive earth-fault detection as

low as 25 mA and can be used on systems with signiﬁcant harmonic

content.The SE-703 provides feeder-level protection or individual-load

protection.The output contacts can be connected for use in protective

tripping circuits or in alarm indication circuits.The analog output can be

used with a PLC or a meter.The SE-703 is speciﬁcally designed to be

AS/NZS 2081 compliant to either 2011 or 2002 (see ordering options).

Features & Beneﬁts

FEATURES

BENEFITS

Adjustable pickup

(25-500 mA)

Adjustable trip setting provides a wide range of low-level

protection and system coordination

Adjustable time delay

(INST-500 ms)

Adjustable trip delay allows quick protection and

system coordination

Form A and Form B or 2 Form C ground-fault output

contacts for operation of separate annunciation and

trip circuits

Allows for connecting an optional meter (PGA-0500) or

control system

Output contacts

Simpliﬁed Circuit Diagram

Analog output

(0-5V)

ꢀꢁ

CT-Loop monitoring

Alarms when CT is not connected

ꢍ

ꢎ

ꢀ

ꢄꢅꢆꢇꢈꢉEꢉ

ꢊꢇꢋꢋLꢌ

Contact operating

mode

Fail-safe operating mode for undervoltage applications,

optional non-fail-safe mode available

Harmonic ﬁltering

Eliminates nuisance tripping

Non-volatile trip

memory

Retains trip state while de-energized to simplify

troubleshooting

Microprocessor based No calibration required, saves maintenance cost

Universal

power supply

Allows operation in application where one side of PT is

faulted, provides ﬂexibility for numerous applications

SE-703 SERIES

(Earth-Leakage Monitor)

(Output contacts

vary by model)

Lꢃ

Lꢂ

Accessories

EFCT Series Ground-Fault CurrentTransformer

Required zero-sequence current transformer

speciﬁcally designed for low-level detection.

PGA-0500 Analog % Current Meter

Optional panel-mounted analog meter displays ground-

fault current as a percentage of the set-point or 5 A.

Ordering Information

ORDERING NUMBER

SE-703-OU

PMA-60 Series – Mounting Adapter

Required when panel mounting for AS/NZS 2081:2011

compliance

CONTROL POWER

120/240 Vac/Vdc

12/24 Vdc

48 Vdc

SE-703-OD

Speciﬁcations

SE-703-OT

IEEE Device Numbers

Input Voltage

Ground fault (50G/N, 51G/N)

See ordering information

H 75 mm (3.0"); W 55 mm (2.2"); D 115 mm (4.5")

25-500 mA

SE-703-03

SE-703-xx-00¹

SE-703-xx-02^1,2

24 Vac

Dimensions

As above

Trip Level Settings

Trip Time Settings

Contact Operating Mode Fail-safe unless noted

Harmonic Filtering

Test Button

INST-500 ms

As above

Standard feature

ACCESSORIES

EFCT Series

PGA-0500

REQUIREMENT

Required

Optional

Standard feature

Reset Button

Standard feature

CT-Loop Monitoring

Output Contacts

Approvals

Standard feature

Isolated Form A and Form B unless noted

CSA certiﬁed, UL Listed (E340889),

CE (European Union), RCM (Australian) unless noted

AS/NZS 2081:2011 unless noted

0-5 V

PMA-55

Optional

PMA-60

Optional

Compliance

Analog Output

Conformally coated

Warranty

SE-EFVC Voltage Clamp

Optional

Yes

5 years

NOTES:

Two Form C contacts. CSA and UL certiﬁcation pending.

Selectable fail-safe/non-fail-safe operating modes (AS/NZS 2081:2002 compliant)

Mounting

DIN, Surface (standard)

Panel (with PMA-55 or PMA-60 adapter)

Rev: 4-C-032917

Based on Manual Rev 12-A-031017

Littelfuse.com/se-703

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