Datasheet > EL731-01-X0

EL731-01-X0

更新时间： 2022-02-26 09:16:56

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力特 - LITTELFUSE		/
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2页	375K
描述
The EL731 is a microprocessor-based

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EL731-01-X0 数据手册

Protection Relays and Controls

Earth-Leakage Protection–Grounded AC or DC Systems

EL731 SERIES

AC/DC Sensitive Earth-Leakage Relay

Description

The EL731 is a microprocessor-based AC/DC Sensitive

Earth-Leakage Relay that offers complete coverage for all

frequencies from 0 to 6,000 Hz. Two CTs are required for the

entire frequency range, or one CT can be used for only low- or

high-frequency detection. An RTD/PTC sensor input allows

over-temperature protection for a motor or drive. The EL731

offers metering, password-protected alarm and trip settings

and optional network communications. It is primarily used to

add low-level ground-fault protection to variable-speed drives,

and to dc circuits.

Simpliﬁed Circuit Diagram

CT1

CT2

CT1

GROUNDED

AC SUPPLY

–

GROUNDED

DC SUPPLY

EL731 SERIES

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EL731 SERIES

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AC Mode

DC Mode

For detailed wiring diagram, see adjacent page.

Accessories

Ordering Information

EFCT Series Earth-Fault Current

Transformer

Required zero-sequence current transformer

speciﬁcally designed for low level detection.

CONTROL

ORDERING NUMBER

POWER

COMMUNICATIONS

EL731-00-X0

EL731-01-X0

EL731-02-X0

EL731-03-X0

EL731-04-X0

EL731-10-X0

EL731-11-X0

EL731-12-X0

EL731-13-X0

EL731-14-X0

EL731-20-X0

EL731-21-X0

EL731-22-X0

EL731-23-X0

EL731-24-X0

120/240 Vac/Vdc

None

120/240 Vac/Vdc

48 Vdc & 24 Vac

24 Vdc

DeviceNet^™

Proﬁbus^®

EtherNet/IP^™

Modbus^®TCP

None

DeviceNet^™

Proﬁbus^®

EtherNet/IP^™

Modbus^®TCP

None

AC700-CUA Series

Communication Adapter

Optional network-interface and ﬁrmware-

upgrade communications adapters ﬁeld-install

in EL731.

AC700-SMK DIN-rail & Surface-mount Adapter

EL731 plugs into adapter for back-plane

mounting.

ACCESSORIES

EFCT Series CT

REQUIREMENT

One Required

AC700-CUA Series Com. Unit

AC700-SMK Surface-Mount Kit

Optional

24 Vdc

DeviceNet^™

Proﬁbus^®

EtherNet/IP^™

Modbus^®TCP

AC700-CVR-00 Watertight Cover (IP66) for

Panel-Mount Applications

24 Vdc

Optional

24 Vdc

PGA-0520 Analog Meter

24 Vdc

Note: When building a part number, replace the “X” with “1” for AS/NZS 2081:2011 Compliant product, “0” otherwise.

Rev: 4-F-040716

Based on Manual Rev 6-F-031116

Littelfuse.com/el731

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