Littelfuse PGR-4700-24 - PGR-4700-24 is a sensitive ground-fault relay with a supply voltage ac and dc of 24.
Littelfuse

PGR-4700-24

Alternate Item Number: PGR-4700-24

UPC: 079458177350


Documents & Media
BrochureTechnical BulletinSpecification SheetUser Manual

Contact for Pricing

Overview

The Littelfuse PGR-4700-24 is a high-performance sensitive ground-fault relay engineered to deliver reliable, rapid detection of ground-fault conditions in industrial power systems. Designed for applications where personnel safety and equipment protection are critical, this relay provides precise monitoring and response to ground faults, preventing damage, downtime, and hazardous conditions. With a versatile 24 VAC/DC supply voltage rating, the PGR-4700-24 ensures seamless integration into a wide range of industrial environments, including manufacturing plants, automation systems, data centers, and renewable energy installations. Ground-fault relays are essential components in electrical safety architectures, serving as the first line of defense against insulation failures, wiring errors, and equipment faults that can lead to electric shock, fires, or catastrophic system failures. Unlike standard overcurrent protection devices, ground-fault relays specifically monitor leakage current to ground, enabling early intervention before faults escalate. The PGR-4700-24 excels in this role by offering adjustable pickup settings and time delays, allowing engineers to tailor protection levels to the unique demands of their systems. This flexibility is particularly valuable in applications with variable load conditions or where selective coordination with other protective devices is required. Key features of the PGR-4700-24 include its compact, DIN-rail mountable design, which simplifies installation in control panels and switchgear. The relay operates without the need for external current transformers (CTs), reducing wiring complexity and installation costs while maintaining high accuracy. Its Form C output contacts provide versatile interfacing options for alarm signaling, remote monitoring, or direct tripping of circuit breakers. Additionally, the relay includes a local test button for routine verification and a reset function for both local and remote operation, enhancing operational convenience and maintenance efficiency. The PGR-4700-24 is ideal for a broad spectrum of industrial applications, including motor control centers, panelboards, generators, and distribution systems. In manufacturing environments, it protects critical machinery from ground-fault damage, minimizing unplanned downtime and repair costs. For automation systems, the relay ensures the integrity of control circuits, safeguarding sensitive electronics from transient faults. In renewable energy installations, such as solar or wind power systems, the PGR-4700-24 monitors ground-fault conditions in inverters and distribution panels, supporting compliance with safety standards like NEC Article 690 and 705. Littelfuse, a global leader in circuit protection and electrical safety solutions, has designed the PGR-4700-24 to meet the rigorous demands of industrial applications. With a heritage of innovation and a commitment to quality, Littelfuse relays are trusted by engineers and technicians worldwide for their reliability, precision, and durability. The PGR-4700-24 is UL Listed and backed by a 5-year warranty, providing peace of mind for mission-critical installations. Whether deployed in new construction or as part of an upgrade to existing systems, this ground-fault relay delivers the performance and dependability required to protect personnel, assets, and operations.
  • 24 VAC/DC supply voltage for versatile industrial compatibility
  • No external CTs required, simplifying installation and reducing costs
  • Adjustable pickup (100-1200 A) and time delay (0-1.0 s) for system coordination
  • Form C output contacts for alarming or tripping applications
  • Compact DIN-rail mountable design with local test and reset functions
  • UL Listed and backed by a 5-year warranty for reliability
  • Ideal for generators, motor control centers, automation systems, and renewable energy installations

Specifications

Application
NA
Brand Name
Littelfuse
Special Features
Detects very lowlevel leakage current on large circuits
Standard
UL Listed
Sub Brand
PGR 4700 Series
Type
Protection Relay
RTXD Extractor Tool

6896057-1

RTXD Extractor Tool
Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10

1-1393143-3

Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10
Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10

1-1393143-6

Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

SCP102D24X-C02

IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.