August 2007

CA05311002E

For more information visit: www.eaton.com

1

CurrentWatch™ Current Sensors

EGF Series Ground Fault Sensors

CA05311002E

EGF Series Ground Fault Sensors

CurrentWatch Current Sensors

Contents

Overview . . . . . . . . . . . . . . . . . . . . 1

Model Selection, Switches . . . . . . 2

Model Selection, Accessories . . . 3

Wiring Diagrams . . . . . . . . . . . . . . 5

Specifications . . . . . . . . . . . . . . . . 6

Dimensions . . . . . . . . . . . . . . . . . . 7

The CurrentWatch EGF Series from

Eaton’s electrical business is a family

of ground fault (earth leakage) sensors.

Ground fault sensors help protect

people, products and processes from

damage by ground fault conditions

by monitoring all current-carrying

conductors in grounded single- and

three-phase delta or wye systems.

The EGF Series is available with

either solid-state or mechanical relay

outputs.

The EGF Series with solid-state out-

puts offers the benefit of reliable,

long-lasting solid-state switches.

Solid-state design provides unlim-

ited switch operating life, superior

resistance to shock and vibration,

zero off-state leakage, high switch

speeds and high input-output isola-

tion. Solid-state outputs have solid-

core housings with screw terminals.

The EGF Series with mechanical

relay outputs are available in solid-

core housings with a choice of N.O. or

N.C. SPST latching relays and a SPDT

Form C relay with auto-reset. All

mechanical models can be ordered

with a fixed setpoint or with a “tri-

set” option, which provides three

factory-set, field-adjustable setpoints.

Approvals

Unless otherwise noted, the

products contained in this

document are not designed

or intended for use in human

safety applications.

Ground Fault Sensors with Solid-State or Mechanical Relay

Outputs

Product Features

state or mechanical relays, normally energized or normally de-energized

contacts

selectable 5, 10 or 30 mA setpoints on the EGF “Tri-set” models make user

adjustments fast, sure and convenient

phases systems, ideal for use with shunt trip breakers, and magnetically

isolated from monitored circuit and control power

Typical Applications

ditions, which could cause injury to people, and functions as a sensor and

alarm trigger when applied as an input to an overall ground fault protection

system

personnel protection is not the primary concern, higher setpoint capability

helps eliminate nuisance tripping while still providing adequate ground

fault detection to protect machine electronics

industrial regulatory groups for ground fault sensing

”Zero Sum” Operating Principle

In three-phase delta and wye systems, under normal conditions, current in the

“hot” leg of a two-wire load is equal in magnitude but opposite in sign to the

current in a neutral leg. As a result, the electromagnetic fields surrounding these

two conductors cancel, producing a “zero sum current.” As soon as current leaks

to ground (fault condition), the two currents become imbalanced and a net

magnetic field results. The CurrentWatch EGF Series sensors monitor this field

and trips the contacts when the leakage rises above the setpoint.

For Customer Service in the U.S. call 1-877-ETN CARE (386-2273),

in Canada call 1-800-268-3578.

For Application Assistance in the U.S. and Canada

call 1-800-426-9184.

Built-In Mounting Tabs

Choice of Solid-State

or Mechanical Relays

Bright LED Status Indicators