Littelfuse PGR-4700 Series - Manual

© 2009 Littelfuse
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POWR-GARD ® Protection Relay Catalog 12
POWR-GARD ® Protection Relays, Monitors & Systems
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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
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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
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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.