Protection Relays and Controls

pdf icon AF0100 Datasheet

pdf icon AF0100 Manual

pdf icon Littelfuse Arc-Flash Relay Brochure

pdf icon Littelfuse Arc-Flash Relay FAQ

pdf icon AF0100 Application Guide

pdf icon AF0500 Datasheet

The AF0500 is a microprocessor-based arc-flash relay that limits arc-fault damage by detecting the light from an arc flash and rapidly tripping the feeder breaker.

pdf icon AF0500 Manual

pdf icon AF0500 Arc-Flash Relay Application Guide

pdf icon TN AF-02 AF0500 Arc-Flash Relay Guideform Specifications Word Doc

AF0500 Arc-Flash Relay Guideform Specifications

pdf icon Littelfuse Arc Flash Energy Reduction Workbook

pdf icon PGR-8800 Datasheet

pdf icon PGR-8800 Manual

The PGR-8800 Arc-Flash Relay is a high-speed, arc-detection device for electrical power distribution systems.

PGR-8800 CAD Drawing

pdf icon PGR-8800 Arc-Flash Relay Application Guide

pdf icon Arc-Flash Case Study

pdf icon PGR-8800 Firmware Update Instructions

pdf icon PGR-8800 Arc-Flash Relay FAQ

pdf icon TN AF-01 PGR-8800 Arc-Flash Relay Guideform Specifications Word Doc

PGR-8800 Arc-Flash Relay Guideform Specifications Technical Note...

pdf icon TN AF-01 PGR-8800 Arc-Flash Relay Guideform Specifications

PGR-8800 Arc-Flash Relay Guideform Specifications Technical Note...

PGR-8800 SKM Device Library Update

Update your SKM software to list the validated PGR-8800 when calculating your incident energy. Using this will save time by automatically determining your systems trip times, arc flash boundaries and required PPE. Please visit www.skm.com for instructions on how to install the SKM file.

pdf icon New Mining Technology Article - Arc-Flash Relays Help Mines Reduce Accidents

pdf icon Littelfuse Arc-Flash Relay Brochure - Spanish

pdf icon PGR-8800 Manual Spanish

PGA-LS10 CAD

pdf icon PGA-LS10 PDF Drawing

pdf icon Electrical Product Portfolio Brochure

We offer industry leading power fuses, protection relays and custom power centers as well as generator protection, controls and alarm panels.

Document D1000 modbus memory map

pdf icon Littelfuse Selco D1000 Presentation

pdf icon PGA-1100 Datasheet

The PGA-1100 Diode Logic module is an optional accessory for the Littelfuse Arc Flash Relays.

CT200 CAD Drawing

CT200-CT200L Drawing

pdf icon 11.1 Ground-Fault CT Selection Flowchart

GROUND-FAULT-CT SELECTION FLOWCHART...

pdf icon 11-1AU Earth-Fault CT Selection Flowchart Australia

EARTH-FAULT-CT SELECTION FLOWCHART...

pdf icon 11-2 Locating Phase Conductors in a Zero-Sequence-CT Window

An ideal window-type current transformer responds only to the sum of the currents flowing through its window...

pdf icon 11-3 Hammond CTs

HAMMOND CT’s...

pdf icon 11-4 Trailing Cable Types

TRAILING CABLE TYPES TECHNICAL INFORMATION...

pdf icon 11-5 Polycast 200 5 CT Test

POLYCAST 200:5 CT TEST TECHNICAL INFORMATION...

pdf icon 11-6 CT-Turns-Ratio Modification

A window-type current transformer is also referred to as a core-balance or flux-balance transformer...

pdf icon 11-7 GE Multilin 2000 1 CT Compatibility with Startco Relays

The HGF5 can be used as a ground-fault-current sensor with Startco MPS, MPU-32, MPU-16A, FPU-16, SE-701, and SE-330 protective relays...

pdf icon 11-8 Ground-Fault Current Transformer Location

A ground fault on a grounded system can be detected using a current-sensitive groundfault monitor...

pdf icon 11-9 Sensitive Ground-Fault Protection Using Split-Core CTs

A zero-sequence CT is optimized by using a symmetrical core and windings that are evenly spaced around the core. The symmetry allows the CT to operate in the presence of high load currents...

pdf icon TN CT-10 CT and PT Polarity Testing

Correct operation of MPS and FPS relays depends on accurate polarity. Markings on current transformers (CT) and potential transformers (PT) have been occasionally misapplied from the factory...

pdf icon TN CT-11 FPL Zero-Sequence Sensors with Littelfuse Relays

pdf icon EFCT Datasheet

The EFCT series is a sensitive nickel-core current transformer used with Littelfuse relays to detect low levels of earth-leakage current.

pdf icon CT Selection Guide

The Current Transformer (CT) Selection Guide provides assistance in selecting the appropriate CT for each protection relay.