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Protection Relay Catalog

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Protection Relays, Monitors & Systems

GROUND-FAULT PROTECTION RELAYS

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Ground-Fault Protection – Solidly Grounded System (PGR 4000 Family)

PGR-4700 SERIES (RCD300M2)

Sensitive Ground-Fault Relay

Description

The PGR-4700 Sensitive Ground-Fault Relay provides

sensitive ground-fault protection without nuisance tripping.

It detects very low-level leakage current on large circuits

to avoid or signiﬁcantly reduce equipment damage. The

leakages can be identiﬁed as they develop and ground faults

can be detected before they become critical.

Applications

Ground-fault relays can be used for the protection of critical

circuits in panel boards and switch boards, OEM power

distribution panels and custom controls. They are typically

used in critical load applications with costly downtime and

hazards, such as high humidity, water, dust, chemicals, and

vibration.

Features/Beneﬁts

Adjustable trip level settings from 10 mA to 3.0 A •

Advanced harmonic ﬁltering•

Compatible with VFD applications•

Adjustable time delay•

Metering output with PLC interface for continuous •

monitoring of system

CT loop monitoring•

Ordering Information

Speciﬁcations

IEEE Device Numbers 50G, 50N, 51G, 51N

Input Voltage See Ordering Information

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

Trip Level Settings 10 mA – 3.0 A

Trip Time Delay Settings 0–1.5 s

Contact Operating Mode Selectable fail-safe or non-fail-safe

(Internal switch)

Harmonic Filtering Standard

Test Button Standard

Reset Button Standard

CT Loop Monitoring Standard

Relay Contacts 2 N.O. and N.C.

Approvals UL listed

Communications Analog Output

Conformally Coated Optional

Warranty 5 Year

Mounting DIN, Surface

TEST RESET

CONTROL

POWER

SENSITIVE GROUND-FAULT RELAY

PGR-4700 SERIES

POWR-GARD

ANALOG

OUTPUT

GROUND FAULT

0-1mA

PGC 5000

SERIES

POWR-GARD

GROUND-FAULT

CURRENT

TRANSFORMER

PGA-0500

POWR-GARD

ANALOG %

CURRENT METER

(optional)

1 2 4 5 6 7 8

9 10 11 12 13 14 15 16

PGR-4700-24 24 Vdc Control Power

PGR-4700-120 120 Vac Control Power

PGR-4700-240 240 Vac Control Power

See pg. 31-36 for Current Transformer Selection Guide and

Accessory Information.

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Littelfuse PGR-4700 Series Instrukcja Użytkownika

Przeglądaj online lub pobierz Instrukcja Użytkownika dla Sprzęt komputerowy Littelfuse PGR-4700 Series. Littelfuse PGR-4700 Series User Manual Instrukcja obsługi

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