PGR-4300 Series – Generator Ground-Fault Relay Series - Littelfuse PGR-4300 Relays Provide Superior Generator Ground-Fault Protection

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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The PGR-4300 series relay operates on solidly-grounded ac systems. This generator ground-fault relay provides a simple method for detecting a ground-fault condition on generators without the need for current transformers (CTs). The lack of CTs greatly simplifies the installation process. This relay also monitors the neutral-to-ground path for continuity, and it is compatible with both three- and four-pole transfer switches. The PGR-4300 relay is ideal for any generator or application where there is not sufficient space to install CTs.

Features

  • No CTs required
  • Adjustable pickup (100–1200 A)
  • Adjustable time-delay (0–1.0 s)
  • Output contacts
  • POWR-GARD® technology
  • Analog output (0–1 mA)
  • N–G continuity alarm
  • Passive filtering

Access specifications, certifications, check availability and order parts below

Catalog #Supply
Voltage
VAC
Supply
Voltage
VDC
Relay Contacts ConfigAnalog Output Current mAIEEE Device NumbersRelay
Contact
Operating
Weight (lbs/g)Auto Manual ResetConformally coatedGF Trip Level AGF Trip Time sReset TypeSystem typeTest ButtonCompare
PGR-4300-12121 Form C (N.O./N.C.)0 - 150G - 50N - 51G - 51NNon Fail-safe0 KgLatching; AutoresetOptional100 - 12000.0 - 1.0Front-panel switchSolidly Grounded ACFront-panel switch
PGR-4300-1201201 Form C (N.O./N.C.)0 - 150G - 50N - 51G - 51NNon Fail-safe0 KgLatching; AutoresetOptional100 - 12000.0 - 1.0Front-panel switchSolidly Grounded ACFront-panel switch
PGR-4300-24241 Form C (N.O./N.C.)0 - 150G - 50N - 51G - 51NNon Fail-safe0 KgLatching; AutoresetOptional100 - 12000.0 - 1.0Front-panel switchSolidly Grounded ACFront-panel switch
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