pgr-8800 Littelfuse, Inc., pgr-8800 Datasheet

pgr-8800

Manufacturer Part Number

pgr-8800

Description

Protection Relays, Monitors & Systems Arc-flash Monitoring

Manufacturer

Littelfuse, Inc.

Datasheet

1.PGR-8800.pdf (2 pages)

Current page: 1 of 2
Download datasheet (171Kb)

Simplified Circuit Diagram

Accessories

PGr-8800 series

Arc-Flash Relay

Arc-Flash Monitoring

Protection Relays, Monitors & Systems

www.littelfuse.com

24 Vdc Battery

Backup

(Optional)

1-A SECONDARY P ASE CT’s

PGA-LS10 Point Sensor

Line-of-sight light sensor with a built-in LED

to indicate sensor health or trip state. Comes

standard with a 32-foot cable.

PGA-LS20 Fiber-Optic Sensor

A 360°, 26-foot fiber-optic sensor detects light

along the entire length of the cable and has a

built-in LED to indicate sensor health or trip state.

Recommended installation is along busbars as

well as in challenging spaces that have many

compartments. Comes standard with two 32-foot

cables.

Phase Current Transformers

Phase Current Transformers (CTs) are required to

detect phase currents. When retrofitting systems,

existing CTs with a 5 A secondary can be used.

(Arc-Flash Protection Relay)

POWR-GARD

PGR-8800

(Recommended)

CTs

POWR-GARD

PGA-LS10

(Point Sensor)

POWR-GARD

PGA-LS20

(Fiber-Optic

Sensor)

Description

The PGR-8800 is a microprocessor-based relay that limits arc-fault

damage by detecting the light from an arc flash and rapidly tripping.

Phase-current-transformer inputs are provided for current-constrained

arc-flash protection and, when so equipped, a programmable definite-

time overcurrent function can be enabled. An optical sensor on the

PGR-8800 and adjustable trip level reduce the chance of nuisance

tripping by setting a threshold for ambient light. Sensors, inputs, and

connections are monitored to ensure fail-safe operation. A secondary

solid-state trip circuit provides a redundant trip path. A USB port is

used for configuration and access event logs and graphs.

Optical Sensors

The PGR-8800 accepts both PGA-LS10 and PGA-LS20 optical sensors

designed to collect light over a wide angle and with high sensitivity.

For fast fault location, front-panel and sensor LED’s indicate sensor

health and which sensor detected an arc fault.

Sensor Placement

The PGR-8800 Arc-Flash Relay and sensors are easily installed in

retrofit projects and new switchgear with little or no re-configuration.

Even elaborate systems with multiple power sources take minutes

to configure using the relay’s built-in USB interface software.

Generally, it is recommended to mount 1 or 2 sensors per cubicle

to cover all horizontal and vertical bus bars, breaker compartments,

drawers, and anywhere that there is potential for an arc-fault. Threading

a fiber-optic sensor through the cabinets and in areas where point-

sensor coverage is uncertain results in complete coverage and an added

level of redundancy.

systems, all maintenance areas should be monitored to prevent

potential damage and additional cost

visibility of an arc fault if a person blocks the other sensor(s).

Even if policy is to only work on de-energized

At least one sensor should have

C C

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pgr-8800 Summary of contents

Page 1

... Phase-current-transformer inputs are provided for current-constrained arc-flash protection and, when so equipped, a programmable definite- time overcurrent function can be enabled. An optical sensor on the PGR-8800 and adjustable trip level reduce the chance of nuisance tripping by setting a threshold for ambient light. Sensors, inputs, and connections are monitored to ensure fail-safe operation. A secondary solid-state trip circuit provides a redundant trip path ...

Page 2

... BeNeFits Limits arc-flash damage and risk of injury Single module can monitor 6 sensors PGR-8800 units can be linked into one system Continuous monitoring of optical sensors and inputs ensures protection Solid-state backup arc-detection circuit adds a second layer of safety Allows for operation in bright environments and maximum sensitivity in dark environments ...

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